[llvm-commits] [llvm] r54885 - in /llvm/trunk/lib/CodeGen: AsmPrinter.cpp AsmPrinter/ AsmPrinter/AsmPrinter.cpp AsmPrinter/DwarfWriter.cpp AsmPrinter/Makefile AsmPrinter/OcamlGCMetadataPrinter.cpp DwarfWriter.cpp Makefile
Anton Korobeynikov
asl at math.spbu.ru
Sun Aug 17 06:53:05 PDT 2008
Author: asl
Date: Sun Aug 17 08:53:04 2008
New Revision: 54885
URL: http://llvm.org/viewvc/llvm-project?rev=54885&view=rev
Log:
Move all assembler printing related stuff into new libAsmPrinter
Added:
llvm/trunk/lib/CodeGen/AsmPrinter/
llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
- copied, changed from r54884, llvm/trunk/lib/CodeGen/AsmPrinter.cpp
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
- copied, changed from r54884, llvm/trunk/lib/CodeGen/DwarfWriter.cpp
llvm/trunk/lib/CodeGen/AsmPrinter/Makefile
llvm/trunk/lib/CodeGen/AsmPrinter/OcamlGCMetadataPrinter.cpp
Removed:
llvm/trunk/lib/CodeGen/AsmPrinter.cpp
llvm/trunk/lib/CodeGen/DwarfWriter.cpp
Modified:
llvm/trunk/lib/CodeGen/Makefile
Removed: llvm/trunk/lib/CodeGen/AsmPrinter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter.cpp?rev=54884&view=auto
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter.cpp (removed)
@@ -1,1509 +0,0 @@
-//===-- AsmPrinter.cpp - Common AsmPrinter code ---------------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the AsmPrinter class.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/Assembly/Writer.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Constants.h"
-#include "llvm/Module.h"
-#include "llvm/CodeGen/GCStrategy.h"
-#include "llvm/CodeGen/GCMetadata.h"
-#include "llvm/CodeGen/GCs.h"
-#include "llvm/CodeGen/MachineConstantPool.h"
-#include "llvm/CodeGen/MachineJumpTableInfo.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/Support/Mangler.h"
-#include "llvm/Support/MathExtras.h"
-#include "llvm/Support/Streams.h"
-#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetLowering.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallString.h"
-#include <cerrno>
-using namespace llvm;
-
-char AsmPrinter::ID = 0;
-AsmPrinter::AsmPrinter(std::ostream &o, TargetMachine &tm,
- const TargetAsmInfo *T)
- : MachineFunctionPass((intptr_t)&ID), FunctionNumber(0), O(o),
- TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
- IsInTextSection(false)
-{}
-
-AsmPrinter::~AsmPrinter() {
- for (gcp_iterator I = GCMetadataPrinters.begin(),
- E = GCMetadataPrinters.end(); I != E; ++I)
- delete I->second;
-}
-
-std::string AsmPrinter::getSectionForFunction(const Function &F) const {
- return TAI->getTextSection();
-}
-
-
-/// SwitchToTextSection - Switch to the specified text section of the executable
-/// if we are not already in it!
-///
-void AsmPrinter::SwitchToTextSection(const char *NewSection,
- const GlobalValue *GV) {
- std::string NS;
- if (GV && GV->hasSection())
- NS = TAI->getSwitchToSectionDirective() + GV->getSection();
- else
- NS = NewSection;
-
- // If we're already in this section, we're done.
- if (CurrentSection == NS) return;
-
- // Close the current section, if applicable.
- if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
- O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
-
- CurrentSection = NS;
-
- if (!CurrentSection.empty())
- O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
-
- IsInTextSection = true;
-}
-
-/// SwitchToDataSection - Switch to the specified data section of the executable
-/// if we are not already in it!
-///
-void AsmPrinter::SwitchToDataSection(const char *NewSection,
- const GlobalValue *GV) {
- std::string NS;
- if (GV && GV->hasSection())
- NS = TAI->getSwitchToSectionDirective() + GV->getSection();
- else
- NS = NewSection;
-
- // If we're already in this section, we're done.
- if (CurrentSection == NS) return;
-
- // Close the current section, if applicable.
- if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
- O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
-
- CurrentSection = NS;
-
- if (!CurrentSection.empty())
- O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
-
- IsInTextSection = false;
-}
-
-
-void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
- MachineFunctionPass::getAnalysisUsage(AU);
- AU.addRequired<CollectorModuleMetadata>();
-}
-
-bool AsmPrinter::doInitialization(Module &M) {
- Mang = new Mangler(M, TAI->getGlobalPrefix());
-
- CollectorModuleMetadata *CMM = getAnalysisToUpdate<CollectorModuleMetadata>();
- assert(CMM && "AsmPrinter didn't require CollectorModuleMetadata?");
- for (CollectorModuleMetadata::iterator I = CMM->begin(),
- E = CMM->end(); I != E; ++I)
- if (GCMetadataPrinter *GCP = GetOrCreateGCPrinter(*I))
- GCP->beginAssembly(O, *this, *TAI);
-<<<<<<< HEAD:lib/CodeGen/AsmPrinter.cpp
-=======
-
->>>>>>> Factor out asmprinters from collector interface.:lib/CodeGen/AsmPrinter.cpp
-
- if (!M.getModuleInlineAsm().empty())
- O << TAI->getCommentString() << " Start of file scope inline assembly\n"
- << M.getModuleInlineAsm()
- << '\n' << TAI->getCommentString()
- << " End of file scope inline assembly\n";
-
- SwitchToDataSection(""); // Reset back to no section.
-
- MMI = getAnalysisToUpdate<MachineModuleInfo>();
- if (MMI) MMI->AnalyzeModule(M);
-
- return false;
-}
-
-bool AsmPrinter::doFinalization(Module &M) {
- if (TAI->getWeakRefDirective()) {
- if (!ExtWeakSymbols.empty())
- SwitchToDataSection("");
-
- for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
- e = ExtWeakSymbols.end(); i != e; ++i) {
- const GlobalValue *GV = *i;
- std::string Name = Mang->getValueName(GV);
- O << TAI->getWeakRefDirective() << Name << '\n';
- }
- }
-
- if (TAI->getSetDirective()) {
- if (!M.alias_empty())
- SwitchToTextSection(TAI->getTextSection());
-
- O << '\n';
- for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
- I!=E; ++I) {
- std::string Name = Mang->getValueName(I);
- std::string Target;
-
- const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
- Target = Mang->getValueName(GV);
-
- if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
- O << "\t.globl\t" << Name << '\n';
- else if (I->hasWeakLinkage())
- O << TAI->getWeakRefDirective() << Name << '\n';
- else if (!I->hasInternalLinkage())
- assert(0 && "Invalid alias linkage");
-
- if (I->hasHiddenVisibility()) {
- if (const char *Directive = TAI->getHiddenDirective())
- O << Directive << Name << '\n';
- } else if (I->hasProtectedVisibility()) {
- if (const char *Directive = TAI->getProtectedDirective())
- O << Directive << Name << '\n';
- }
-
- O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
-
- // If the aliasee has external weak linkage it can be referenced only by
- // alias itself. In this case it can be not in ExtWeakSymbols list. Emit
- // weak reference in such case.
- if (GV->hasExternalWeakLinkage()) {
- if (TAI->getWeakRefDirective())
- O << TAI->getWeakRefDirective() << Target << '\n';
- else
- O << "\t.globl\t" << Target << '\n';
- }
- }
- }
-
- CollectorModuleMetadata *CMM = getAnalysisToUpdate<CollectorModuleMetadata>();
- assert(CMM && "AsmPrinter didn't require CollectorModuleMetadata?");
- for (CollectorModuleMetadata::iterator I = CMM->end(),
- E = CMM->begin(); I != E; )
- if (GCMetadataPrinter *GCP = GetOrCreateGCPrinter(*--I))
- GCP->finishAssembly(O, *this, *TAI);
-
- // If we don't have any trampolines, then we don't require stack memory
- // to be executable. Some targets have a directive to declare this.
- Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
- if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
- if (TAI->getNonexecutableStackDirective())
- O << TAI->getNonexecutableStackDirective() << '\n';
-
- delete Mang; Mang = 0;
- return false;
-}
-
-std::string AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) {
- assert(MF && "No machine function?");
- std::string Name = MF->getFunction()->getName();
- if (Name.empty())
- Name = Mang->getValueName(MF->getFunction());
- return Mang->makeNameProper(Name + ".eh", TAI->getGlobalPrefix());
-}
-
-void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
- // What's my mangled name?
- CurrentFnName = Mang->getValueName(MF.getFunction());
- IncrementFunctionNumber();
-}
-
-/// EmitConstantPool - Print to the current output stream assembly
-/// representations of the constants in the constant pool MCP. This is
-/// used to print out constants which have been "spilled to memory" by
-/// the code generator.
-///
-void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
- const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
- if (CP.empty()) return;
-
- // Some targets require 4-, 8-, and 16- byte constant literals to be placed
- // in special sections.
- std::vector<std::pair<MachineConstantPoolEntry,unsigned> > FourByteCPs;
- std::vector<std::pair<MachineConstantPoolEntry,unsigned> > EightByteCPs;
- std::vector<std::pair<MachineConstantPoolEntry,unsigned> > SixteenByteCPs;
- std::vector<std::pair<MachineConstantPoolEntry,unsigned> > OtherCPs;
- std::vector<std::pair<MachineConstantPoolEntry,unsigned> > TargetCPs;
- for (unsigned i = 0, e = CP.size(); i != e; ++i) {
- MachineConstantPoolEntry CPE = CP[i];
- const Type *Ty = CPE.getType();
- if (TAI->getFourByteConstantSection() &&
- TM.getTargetData()->getABITypeSize(Ty) == 4)
- FourByteCPs.push_back(std::make_pair(CPE, i));
- else if (TAI->getEightByteConstantSection() &&
- TM.getTargetData()->getABITypeSize(Ty) == 8)
- EightByteCPs.push_back(std::make_pair(CPE, i));
- else if (TAI->getSixteenByteConstantSection() &&
- TM.getTargetData()->getABITypeSize(Ty) == 16)
- SixteenByteCPs.push_back(std::make_pair(CPE, i));
- else
- OtherCPs.push_back(std::make_pair(CPE, i));
- }
-
- unsigned Alignment = MCP->getConstantPoolAlignment();
- EmitConstantPool(Alignment, TAI->getFourByteConstantSection(), FourByteCPs);
- EmitConstantPool(Alignment, TAI->getEightByteConstantSection(), EightByteCPs);
- EmitConstantPool(Alignment, TAI->getSixteenByteConstantSection(),
- SixteenByteCPs);
- EmitConstantPool(Alignment, TAI->getConstantPoolSection(), OtherCPs);
-}
-
-void AsmPrinter::EmitConstantPool(unsigned Alignment, const char *Section,
- std::vector<std::pair<MachineConstantPoolEntry,unsigned> > &CP) {
- if (CP.empty()) return;
-
- SwitchToDataSection(Section);
- EmitAlignment(Alignment);
- for (unsigned i = 0, e = CP.size(); i != e; ++i) {
- O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
- << CP[i].second << ":\t\t\t\t\t" << TAI->getCommentString() << ' ';
- WriteTypeSymbolic(O, CP[i].first.getType(), 0) << '\n';
- if (CP[i].first.isMachineConstantPoolEntry())
- EmitMachineConstantPoolValue(CP[i].first.Val.MachineCPVal);
- else
- EmitGlobalConstant(CP[i].first.Val.ConstVal);
- if (i != e-1) {
- const Type *Ty = CP[i].first.getType();
- unsigned EntSize =
- TM.getTargetData()->getABITypeSize(Ty);
- unsigned ValEnd = CP[i].first.getOffset() + EntSize;
- // Emit inter-object padding for alignment.
- EmitZeros(CP[i+1].first.getOffset()-ValEnd);
- }
- }
-}
-
-/// EmitJumpTableInfo - Print assembly representations of the jump tables used
-/// by the current function to the current output stream.
-///
-void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
- MachineFunction &MF) {
- const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
- if (JT.empty()) return;
-
- bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
-
- // Pick the directive to use to print the jump table entries, and switch to
- // the appropriate section.
- TargetLowering *LoweringInfo = TM.getTargetLowering();
-
- const char* JumpTableDataSection = TAI->getJumpTableDataSection();
- const Function *F = MF.getFunction();
- unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
- if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
- !JumpTableDataSection ||
- SectionFlags & SectionFlags::Linkonce) {
- // In PIC mode, we need to emit the jump table to the same section as the
- // function body itself, otherwise the label differences won't make sense.
- // We should also do if the section name is NULL or function is declared in
- // discardable section.
- SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
- } else {
- SwitchToDataSection(JumpTableDataSection);
- }
-
- EmitAlignment(Log2_32(MJTI->getAlignment()));
-
- for (unsigned i = 0, e = JT.size(); i != e; ++i) {
- const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
-
- // If this jump table was deleted, ignore it.
- if (JTBBs.empty()) continue;
-
- // For PIC codegen, if possible we want to use the SetDirective to reduce
- // the number of relocations the assembler will generate for the jump table.
- // Set directives are all printed before the jump table itself.
- SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
- if (TAI->getSetDirective() && IsPic)
- for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
- if (EmittedSets.insert(JTBBs[ii]))
- printPICJumpTableSetLabel(i, JTBBs[ii]);
-
- // On some targets (e.g. darwin) we want to emit two consequtive labels
- // before each jump table. The first label is never referenced, but tells
- // the assembler and linker the extents of the jump table object. The
- // second label is actually referenced by the code.
- if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
- O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
-
- O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << i << ":\n";
-
- for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
- printPICJumpTableEntry(MJTI, JTBBs[ii], i);
- O << '\n';
- }
- }
-}
-
-void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
- const MachineBasicBlock *MBB,
- unsigned uid) const {
- bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
-
- // Use JumpTableDirective otherwise honor the entry size from the jump table
- // info.
- const char *JTEntryDirective = TAI->getJumpTableDirective();
- bool HadJTEntryDirective = JTEntryDirective != NULL;
- if (!HadJTEntryDirective) {
- JTEntryDirective = MJTI->getEntrySize() == 4 ?
- TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
- }
-
- O << JTEntryDirective << ' ';
-
- // If we have emitted set directives for the jump table entries, print
- // them rather than the entries themselves. If we're emitting PIC, then
- // emit the table entries as differences between two text section labels.
- // If we're emitting non-PIC code, then emit the entries as direct
- // references to the target basic blocks.
- if (IsPic) {
- if (TAI->getSetDirective()) {
- O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
- << '_' << uid << "_set_" << MBB->getNumber();
- } else {
- printBasicBlockLabel(MBB, false, false, false);
- // If the arch uses custom Jump Table directives, don't calc relative to
- // JT
- if (!HadJTEntryDirective)
- O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
- << getFunctionNumber() << '_' << uid;
- }
- } else {
- printBasicBlockLabel(MBB, false, false, false);
- }
-}
-
-
-/// EmitSpecialLLVMGlobal - Check to see if the specified global is a
-/// special global used by LLVM. If so, emit it and return true, otherwise
-/// do nothing and return false.
-bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
- if (GV->getName() == "llvm.used") {
- if (TAI->getUsedDirective() != 0) // No need to emit this at all.
- EmitLLVMUsedList(GV->getInitializer());
- return true;
- }
-
- // Ignore debug and non-emitted data.
- if (GV->getSection() == "llvm.metadata") return true;
-
- if (!GV->hasAppendingLinkage()) return false;
-
- assert(GV->hasInitializer() && "Not a special LLVM global!");
-
- const TargetData *TD = TM.getTargetData();
- unsigned Align = Log2_32(TD->getPointerPrefAlignment());
- if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
- SwitchToDataSection(TAI->getStaticCtorsSection());
- EmitAlignment(Align, 0);
- EmitXXStructorList(GV->getInitializer());
- return true;
- }
-
- if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
- SwitchToDataSection(TAI->getStaticDtorsSection());
- EmitAlignment(Align, 0);
- EmitXXStructorList(GV->getInitializer());
- return true;
- }
-
- return false;
-}
-
-/// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
-/// global in the specified llvm.used list as being used with this directive.
-void AsmPrinter::EmitLLVMUsedList(Constant *List) {
- const char *Directive = TAI->getUsedDirective();
-
- // Should be an array of 'sbyte*'.
- ConstantArray *InitList = dyn_cast<ConstantArray>(List);
- if (InitList == 0) return;
-
- for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
- O << Directive;
- EmitConstantValueOnly(InitList->getOperand(i));
- O << '\n';
- }
-}
-
-/// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
-/// function pointers, ignoring the init priority.
-void AsmPrinter::EmitXXStructorList(Constant *List) {
- // Should be an array of '{ int, void ()* }' structs. The first value is the
- // init priority, which we ignore.
- if (!isa<ConstantArray>(List)) return;
- ConstantArray *InitList = cast<ConstantArray>(List);
- for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
- if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
- if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
-
- if (CS->getOperand(1)->isNullValue())
- return; // Found a null terminator, exit printing.
- // Emit the function pointer.
- EmitGlobalConstant(CS->getOperand(1));
- }
-}
-
-/// getGlobalLinkName - Returns the asm/link name of of the specified
-/// global variable. Should be overridden by each target asm printer to
-/// generate the appropriate value.
-const std::string AsmPrinter::getGlobalLinkName(const GlobalVariable *GV) const{
- std::string LinkName;
-
- if (isa<Function>(GV)) {
- LinkName += TAI->getFunctionAddrPrefix();
- LinkName += Mang->getValueName(GV);
- LinkName += TAI->getFunctionAddrSuffix();
- } else {
- LinkName += TAI->getGlobalVarAddrPrefix();
- LinkName += Mang->getValueName(GV);
- LinkName += TAI->getGlobalVarAddrSuffix();
- }
-
- return LinkName;
-}
-
-/// EmitExternalGlobal - Emit the external reference to a global variable.
-/// Should be overridden if an indirect reference should be used.
-void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
- O << getGlobalLinkName(GV);
-}
-
-
-
-//===----------------------------------------------------------------------===//
-/// LEB 128 number encoding.
-
-/// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
-/// representing an unsigned leb128 value.
-void AsmPrinter::PrintULEB128(unsigned Value) const {
- do {
- unsigned Byte = Value & 0x7f;
- Value >>= 7;
- if (Value) Byte |= 0x80;
- O << "0x" << std::hex << Byte << std::dec;
- if (Value) O << ", ";
- } while (Value);
-}
-
-/// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
-/// representing a signed leb128 value.
-void AsmPrinter::PrintSLEB128(int Value) const {
- int Sign = Value >> (8 * sizeof(Value) - 1);
- bool IsMore;
-
- do {
- unsigned Byte = Value & 0x7f;
- Value >>= 7;
- IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
- if (IsMore) Byte |= 0x80;
- O << "0x" << std::hex << Byte << std::dec;
- if (IsMore) O << ", ";
- } while (IsMore);
-}
-
-//===--------------------------------------------------------------------===//
-// Emission and print routines
-//
-
-/// PrintHex - Print a value as a hexidecimal value.
-///
-void AsmPrinter::PrintHex(int Value) const {
- O << "0x" << std::hex << Value << std::dec;
-}
-
-/// EOL - Print a newline character to asm stream. If a comment is present
-/// then it will be printed first. Comments should not contain '\n'.
-void AsmPrinter::EOL() const {
- O << '\n';
-}
-
-void AsmPrinter::EOL(const std::string &Comment) const {
- if (VerboseAsm && !Comment.empty()) {
- O << '\t'
- << TAI->getCommentString()
- << ' '
- << Comment;
- }
- O << '\n';
-}
-
-void AsmPrinter::EOL(const char* Comment) const {
- if (VerboseAsm && *Comment) {
- O << '\t'
- << TAI->getCommentString()
- << ' '
- << Comment;
- }
- O << '\n';
-}
-
-/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
-/// unsigned leb128 value.
-void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
- if (TAI->hasLEB128()) {
- O << "\t.uleb128\t"
- << Value;
- } else {
- O << TAI->getData8bitsDirective();
- PrintULEB128(Value);
- }
-}
-
-/// EmitSLEB128Bytes - print an assembler byte data directive to compose a
-/// signed leb128 value.
-void AsmPrinter::EmitSLEB128Bytes(int Value) const {
- if (TAI->hasLEB128()) {
- O << "\t.sleb128\t"
- << Value;
- } else {
- O << TAI->getData8bitsDirective();
- PrintSLEB128(Value);
- }
-}
-
-/// EmitInt8 - Emit a byte directive and value.
-///
-void AsmPrinter::EmitInt8(int Value) const {
- O << TAI->getData8bitsDirective();
- PrintHex(Value & 0xFF);
-}
-
-/// EmitInt16 - Emit a short directive and value.
-///
-void AsmPrinter::EmitInt16(int Value) const {
- O << TAI->getData16bitsDirective();
- PrintHex(Value & 0xFFFF);
-}
-
-/// EmitInt32 - Emit a long directive and value.
-///
-void AsmPrinter::EmitInt32(int Value) const {
- O << TAI->getData32bitsDirective();
- PrintHex(Value);
-}
-
-/// EmitInt64 - Emit a long long directive and value.
-///
-void AsmPrinter::EmitInt64(uint64_t Value) const {
- if (TAI->getData64bitsDirective()) {
- O << TAI->getData64bitsDirective();
- PrintHex(Value);
- } else {
- if (TM.getTargetData()->isBigEndian()) {
- EmitInt32(unsigned(Value >> 32)); O << '\n';
- EmitInt32(unsigned(Value));
- } else {
- EmitInt32(unsigned(Value)); O << '\n';
- EmitInt32(unsigned(Value >> 32));
- }
- }
-}
-
-/// toOctal - Convert the low order bits of X into an octal digit.
-///
-static inline char toOctal(int X) {
- return (X&7)+'0';
-}
-
-/// printStringChar - Print a char, escaped if necessary.
-///
-static void printStringChar(std::ostream &O, unsigned char C) {
- if (C == '"') {
- O << "\\\"";
- } else if (C == '\\') {
- O << "\\\\";
- } else if (isprint(C)) {
- O << C;
- } else {
- switch(C) {
- case '\b': O << "\\b"; break;
- case '\f': O << "\\f"; break;
- case '\n': O << "\\n"; break;
- case '\r': O << "\\r"; break;
- case '\t': O << "\\t"; break;
- default:
- O << '\\';
- O << toOctal(C >> 6);
- O << toOctal(C >> 3);
- O << toOctal(C >> 0);
- break;
- }
- }
-}
-
-/// EmitString - Emit a string with quotes and a null terminator.
-/// Special characters are emitted properly.
-/// \literal (Eg. '\t') \endliteral
-void AsmPrinter::EmitString(const std::string &String) const {
- const char* AscizDirective = TAI->getAscizDirective();
- if (AscizDirective)
- O << AscizDirective;
- else
- O << TAI->getAsciiDirective();
- O << '\"';
- for (unsigned i = 0, N = String.size(); i < N; ++i) {
- unsigned char C = String[i];
- printStringChar(O, C);
- }
- if (AscizDirective)
- O << '\"';
- else
- O << "\\0\"";
-}
-
-
-/// EmitFile - Emit a .file directive.
-void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
- O << "\t.file\t" << Number << " \"";
- for (unsigned i = 0, N = Name.size(); i < N; ++i) {
- unsigned char C = Name[i];
- printStringChar(O, C);
- }
- O << '\"';
-}
-
-
-//===----------------------------------------------------------------------===//
-
-// EmitAlignment - Emit an alignment directive to the specified power of
-// two boundary. For example, if you pass in 3 here, you will get an 8
-// byte alignment. If a global value is specified, and if that global has
-// an explicit alignment requested, it will unconditionally override the
-// alignment request. However, if ForcedAlignBits is specified, this value
-// has final say: the ultimate alignment will be the max of ForcedAlignBits
-// and the alignment computed with NumBits and the global.
-//
-// The algorithm is:
-// Align = NumBits;
-// if (GV && GV->hasalignment) Align = GV->getalignment();
-// Align = std::max(Align, ForcedAlignBits);
-//
-void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
- unsigned ForcedAlignBits,
- bool UseFillExpr) const {
- if (GV && GV->getAlignment())
- NumBits = Log2_32(GV->getAlignment());
- NumBits = std::max(NumBits, ForcedAlignBits);
-
- if (NumBits == 0) return; // No need to emit alignment.
- if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
- O << TAI->getAlignDirective() << NumBits;
-
- unsigned FillValue = TAI->getTextAlignFillValue();
- UseFillExpr &= IsInTextSection && FillValue;
- if (UseFillExpr) O << ",0x" << std::hex << FillValue << std::dec;
- O << '\n';
-}
-
-
-/// EmitZeros - Emit a block of zeros.
-///
-void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
- if (NumZeros) {
- if (TAI->getZeroDirective()) {
- O << TAI->getZeroDirective() << NumZeros;
- if (TAI->getZeroDirectiveSuffix())
- O << TAI->getZeroDirectiveSuffix();
- O << '\n';
- } else {
- for (; NumZeros; --NumZeros)
- O << TAI->getData8bitsDirective() << "0\n";
- }
- }
-}
-
-// Print out the specified constant, without a storage class. Only the
-// constants valid in constant expressions can occur here.
-void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
- if (CV->isNullValue() || isa<UndefValue>(CV))
- O << '0';
- else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
- O << CI->getZExtValue();
- } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
- // This is a constant address for a global variable or function. Use the
- // name of the variable or function as the address value, possibly
- // decorating it with GlobalVarAddrPrefix/Suffix or
- // FunctionAddrPrefix/Suffix (these all default to "" )
- if (isa<Function>(GV)) {
- O << TAI->getFunctionAddrPrefix()
- << Mang->getValueName(GV)
- << TAI->getFunctionAddrSuffix();
- } else {
- O << TAI->getGlobalVarAddrPrefix()
- << Mang->getValueName(GV)
- << TAI->getGlobalVarAddrSuffix();
- }
- } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
- const TargetData *TD = TM.getTargetData();
- unsigned Opcode = CE->getOpcode();
- switch (Opcode) {
- case Instruction::GetElementPtr: {
- // generate a symbolic expression for the byte address
- const Constant *ptrVal = CE->getOperand(0);
- SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
- if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
- idxVec.size())) {
- if (Offset)
- O << '(';
- EmitConstantValueOnly(ptrVal);
- if (Offset > 0)
- O << ") + " << Offset;
- else if (Offset < 0)
- O << ") - " << -Offset;
- } else {
- EmitConstantValueOnly(ptrVal);
- }
- break;
- }
- case Instruction::Trunc:
- case Instruction::ZExt:
- case Instruction::SExt:
- case Instruction::FPTrunc:
- case Instruction::FPExt:
- case Instruction::UIToFP:
- case Instruction::SIToFP:
- case Instruction::FPToUI:
- case Instruction::FPToSI:
- assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
- break;
- case Instruction::BitCast:
- return EmitConstantValueOnly(CE->getOperand(0));
-
- case Instruction::IntToPtr: {
- // Handle casts to pointers by changing them into casts to the appropriate
- // integer type. This promotes constant folding and simplifies this code.
- Constant *Op = CE->getOperand(0);
- Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
- return EmitConstantValueOnly(Op);
- }
-
-
- case Instruction::PtrToInt: {
- // Support only foldable casts to/from pointers that can be eliminated by
- // changing the pointer to the appropriately sized integer type.
- Constant *Op = CE->getOperand(0);
- const Type *Ty = CE->getType();
-
- // We can emit the pointer value into this slot if the slot is an
- // integer slot greater or equal to the size of the pointer.
- if (TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
- return EmitConstantValueOnly(Op);
-
- O << "((";
- EmitConstantValueOnly(Op);
- APInt ptrMask = APInt::getAllOnesValue(TD->getABITypeSizeInBits(Ty));
-
- SmallString<40> S;
- ptrMask.toStringUnsigned(S);
- O << ") & " << S.c_str() << ')';
- break;
- }
- case Instruction::Add:
- case Instruction::Sub:
- case Instruction::And:
- case Instruction::Or:
- case Instruction::Xor:
- O << '(';
- EmitConstantValueOnly(CE->getOperand(0));
- O << ')';
- switch (Opcode) {
- case Instruction::Add:
- O << " + ";
- break;
- case Instruction::Sub:
- O << " - ";
- break;
- case Instruction::And:
- O << " & ";
- break;
- case Instruction::Or:
- O << " | ";
- break;
- case Instruction::Xor:
- O << " ^ ";
- break;
- default:
- break;
- }
- O << '(';
- EmitConstantValueOnly(CE->getOperand(1));
- O << ')';
- break;
- default:
- assert(0 && "Unsupported operator!");
- }
- } else {
- assert(0 && "Unknown constant value!");
- }
-}
-
-/// printAsCString - Print the specified array as a C compatible string, only if
-/// the predicate isString is true.
-///
-static void printAsCString(std::ostream &O, const ConstantArray *CVA,
- unsigned LastElt) {
- assert(CVA->isString() && "Array is not string compatible!");
-
- O << '\"';
- for (unsigned i = 0; i != LastElt; ++i) {
- unsigned char C =
- (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
- printStringChar(O, C);
- }
- O << '\"';
-}
-
-/// EmitString - Emit a zero-byte-terminated string constant.
-///
-void AsmPrinter::EmitString(const ConstantArray *CVA) const {
- unsigned NumElts = CVA->getNumOperands();
- if (TAI->getAscizDirective() && NumElts &&
- cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
- O << TAI->getAscizDirective();
- printAsCString(O, CVA, NumElts-1);
- } else {
- O << TAI->getAsciiDirective();
- printAsCString(O, CVA, NumElts);
- }
- O << '\n';
-}
-
-/// EmitGlobalConstant - Print a general LLVM constant to the .s file.
-void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
- const TargetData *TD = TM.getTargetData();
- unsigned Size = TD->getABITypeSize(CV->getType());
-
- if (CV->isNullValue() || isa<UndefValue>(CV)) {
- EmitZeros(Size);
- return;
- } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
- if (CVA->isString()) {
- EmitString(CVA);
- } else { // Not a string. Print the values in successive locations
- for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
- EmitGlobalConstant(CVA->getOperand(i));
- }
- return;
- } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
- // Print the fields in successive locations. Pad to align if needed!
- const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
- uint64_t sizeSoFar = 0;
- for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
- const Constant* field = CVS->getOperand(i);
-
- // Check if padding is needed and insert one or more 0s.
- uint64_t fieldSize = TD->getABITypeSize(field->getType());
- uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
- - cvsLayout->getElementOffset(i)) - fieldSize;
- sizeSoFar += fieldSize + padSize;
-
- // Now print the actual field value.
- EmitGlobalConstant(field);
-
- // Insert padding - this may include padding to increase the size of the
- // current field up to the ABI size (if the struct is not packed) as well
- // as padding to ensure that the next field starts at the right offset.
- EmitZeros(padSize);
- }
- assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
- "Layout of constant struct may be incorrect!");
- return;
- } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
- // FP Constants are printed as integer constants to avoid losing
- // precision...
- if (CFP->getType() == Type::DoubleTy) {
- double Val = CFP->getValueAPF().convertToDouble(); // for comment only
- uint64_t i = CFP->getValueAPF().convertToAPInt().getZExtValue();
- if (TAI->getData64bitsDirective())
- O << TAI->getData64bitsDirective() << i << '\t'
- << TAI->getCommentString() << " double value: " << Val << '\n';
- else if (TD->isBigEndian()) {
- O << TAI->getData32bitsDirective() << unsigned(i >> 32)
- << '\t' << TAI->getCommentString()
- << " double most significant word " << Val << '\n';
- O << TAI->getData32bitsDirective() << unsigned(i)
- << '\t' << TAI->getCommentString()
- << " double least significant word " << Val << '\n';
- } else {
- O << TAI->getData32bitsDirective() << unsigned(i)
- << '\t' << TAI->getCommentString()
- << " double least significant word " << Val << '\n';
- O << TAI->getData32bitsDirective() << unsigned(i >> 32)
- << '\t' << TAI->getCommentString()
- << " double most significant word " << Val << '\n';
- }
- return;
- } else if (CFP->getType() == Type::FloatTy) {
- float Val = CFP->getValueAPF().convertToFloat(); // for comment only
- O << TAI->getData32bitsDirective()
- << CFP->getValueAPF().convertToAPInt().getZExtValue()
- << '\t' << TAI->getCommentString() << " float " << Val << '\n';
- return;
- } else if (CFP->getType() == Type::X86_FP80Ty) {
- // all long double variants are printed as hex
- // api needed to prevent premature destruction
- APInt api = CFP->getValueAPF().convertToAPInt();
- const uint64_t *p = api.getRawData();
- APFloat DoubleVal = CFP->getValueAPF();
- DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
- if (TD->isBigEndian()) {
- O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
- << '\t' << TAI->getCommentString()
- << " long double most significant halfword of ~"
- << DoubleVal.convertToDouble() << '\n';
- O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
- << '\t' << TAI->getCommentString()
- << " long double next halfword\n";
- O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
- << '\t' << TAI->getCommentString()
- << " long double next halfword\n";
- O << TAI->getData16bitsDirective() << uint16_t(p[0])
- << '\t' << TAI->getCommentString()
- << " long double next halfword\n";
- O << TAI->getData16bitsDirective() << uint16_t(p[1])
- << '\t' << TAI->getCommentString()
- << " long double least significant halfword\n";
- } else {
- O << TAI->getData16bitsDirective() << uint16_t(p[1])
- << '\t' << TAI->getCommentString()
- << " long double least significant halfword of ~"
- << DoubleVal.convertToDouble() << '\n';
- O << TAI->getData16bitsDirective() << uint16_t(p[0])
- << '\t' << TAI->getCommentString()
- << " long double next halfword\n";
- O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
- << '\t' << TAI->getCommentString()
- << " long double next halfword\n";
- O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
- << '\t' << TAI->getCommentString()
- << " long double next halfword\n";
- O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
- << '\t' << TAI->getCommentString()
- << " long double most significant halfword\n";
- }
- EmitZeros(Size - TD->getTypeStoreSize(Type::X86_FP80Ty));
- return;
- } else if (CFP->getType() == Type::PPC_FP128Ty) {
- // all long double variants are printed as hex
- // api needed to prevent premature destruction
- APInt api = CFP->getValueAPF().convertToAPInt();
- const uint64_t *p = api.getRawData();
- if (TD->isBigEndian()) {
- O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
- << '\t' << TAI->getCommentString()
- << " long double most significant word\n";
- O << TAI->getData32bitsDirective() << uint32_t(p[0])
- << '\t' << TAI->getCommentString()
- << " long double next word\n";
- O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
- << '\t' << TAI->getCommentString()
- << " long double next word\n";
- O << TAI->getData32bitsDirective() << uint32_t(p[1])
- << '\t' << TAI->getCommentString()
- << " long double least significant word\n";
- } else {
- O << TAI->getData32bitsDirective() << uint32_t(p[1])
- << '\t' << TAI->getCommentString()
- << " long double least significant word\n";
- O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
- << '\t' << TAI->getCommentString()
- << " long double next word\n";
- O << TAI->getData32bitsDirective() << uint32_t(p[0])
- << '\t' << TAI->getCommentString()
- << " long double next word\n";
- O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
- << '\t' << TAI->getCommentString()
- << " long double most significant word\n";
- }
- return;
- } else assert(0 && "Floating point constant type not handled");
- } else if (CV->getType() == Type::Int64Ty) {
- if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
- uint64_t Val = CI->getZExtValue();
-
- if (TAI->getData64bitsDirective())
- O << TAI->getData64bitsDirective() << Val << '\n';
- else if (TD->isBigEndian()) {
- O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
- << '\t' << TAI->getCommentString()
- << " Double-word most significant word " << Val << '\n';
- O << TAI->getData32bitsDirective() << unsigned(Val)
- << '\t' << TAI->getCommentString()
- << " Double-word least significant word " << Val << '\n';
- } else {
- O << TAI->getData32bitsDirective() << unsigned(Val)
- << '\t' << TAI->getCommentString()
- << " Double-word least significant word " << Val << '\n';
- O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
- << '\t' << TAI->getCommentString()
- << " Double-word most significant word " << Val << '\n';
- }
- return;
- }
- } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
- const VectorType *PTy = CP->getType();
-
- for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
- EmitGlobalConstant(CP->getOperand(I));
-
- return;
- }
-
- const Type *type = CV->getType();
- printDataDirective(type);
- EmitConstantValueOnly(CV);
- if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
- SmallString<40> S;
- CI->getValue().toStringUnsigned(S, 16);
- O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
- }
- O << '\n';
-}
-
-void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
- // Target doesn't support this yet!
- abort();
-}
-
-/// PrintSpecial - Print information related to the specified machine instr
-/// that is independent of the operand, and may be independent of the instr
-/// itself. This can be useful for portably encoding the comment character
-/// or other bits of target-specific knowledge into the asmstrings. The
-/// syntax used is ${:comment}. Targets can override this to add support
-/// for their own strange codes.
-void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
- if (!strcmp(Code, "private")) {
- O << TAI->getPrivateGlobalPrefix();
- } else if (!strcmp(Code, "comment")) {
- O << TAI->getCommentString();
- } else if (!strcmp(Code, "uid")) {
- // Assign a unique ID to this machine instruction.
- static const MachineInstr *LastMI = 0;
- static const Function *F = 0;
- static unsigned Counter = 0U-1;
-
- // Comparing the address of MI isn't sufficient, because machineinstrs may
- // be allocated to the same address across functions.
- const Function *ThisF = MI->getParent()->getParent()->getFunction();
-
- // If this is a new machine instruction, bump the counter.
- if (LastMI != MI || F != ThisF) {
- ++Counter;
- LastMI = MI;
- F = ThisF;
- }
- O << Counter;
- } else {
- cerr << "Unknown special formatter '" << Code
- << "' for machine instr: " << *MI;
- exit(1);
- }
-}
-
-
-/// printInlineAsm - This method formats and prints the specified machine
-/// instruction that is an inline asm.
-void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
- unsigned NumOperands = MI->getNumOperands();
-
- // Count the number of register definitions.
- unsigned NumDefs = 0;
- for (; MI->getOperand(NumDefs).isRegister() && MI->getOperand(NumDefs).isDef();
- ++NumDefs)
- assert(NumDefs != NumOperands-1 && "No asm string?");
-
- assert(MI->getOperand(NumDefs).isExternalSymbol() && "No asm string?");
-
- // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
- const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
-
- // If this asmstr is empty, just print the #APP/#NOAPP markers.
- // These are useful to see where empty asm's wound up.
- if (AsmStr[0] == 0) {
- O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
- return;
- }
-
- O << TAI->getInlineAsmStart() << "\n\t";
-
- // The variant of the current asmprinter.
- int AsmPrinterVariant = TAI->getAssemblerDialect();
-
- int CurVariant = -1; // The number of the {.|.|.} region we are in.
- const char *LastEmitted = AsmStr; // One past the last character emitted.
-
- while (*LastEmitted) {
- switch (*LastEmitted) {
- default: {
- // Not a special case, emit the string section literally.
- const char *LiteralEnd = LastEmitted+1;
- while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
- *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
- ++LiteralEnd;
- if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
- O.write(LastEmitted, LiteralEnd-LastEmitted);
- LastEmitted = LiteralEnd;
- break;
- }
- case '\n':
- ++LastEmitted; // Consume newline character.
- O << '\n'; // Indent code with newline.
- break;
- case '$': {
- ++LastEmitted; // Consume '$' character.
- bool Done = true;
-
- // Handle escapes.
- switch (*LastEmitted) {
- default: Done = false; break;
- case '$': // $$ -> $
- if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
- O << '$';
- ++LastEmitted; // Consume second '$' character.
- break;
- case '(': // $( -> same as GCC's { character.
- ++LastEmitted; // Consume '(' character.
- if (CurVariant != -1) {
- cerr << "Nested variants found in inline asm string: '"
- << AsmStr << "'\n";
- exit(1);
- }
- CurVariant = 0; // We're in the first variant now.
- break;
- case '|':
- ++LastEmitted; // consume '|' character.
- if (CurVariant == -1) {
- cerr << "Found '|' character outside of variant in inline asm "
- << "string: '" << AsmStr << "'\n";
- exit(1);
- }
- ++CurVariant; // We're in the next variant.
- break;
- case ')': // $) -> same as GCC's } char.
- ++LastEmitted; // consume ')' character.
- if (CurVariant == -1) {
- cerr << "Found '}' character outside of variant in inline asm "
- << "string: '" << AsmStr << "'\n";
- exit(1);
- }
- CurVariant = -1;
- break;
- }
- if (Done) break;
-
- bool HasCurlyBraces = false;
- if (*LastEmitted == '{') { // ${variable}
- ++LastEmitted; // Consume '{' character.
- HasCurlyBraces = true;
- }
-
- const char *IDStart = LastEmitted;
- char *IDEnd;
- errno = 0;
- long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
- if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
- cerr << "Bad $ operand number in inline asm string: '"
- << AsmStr << "'\n";
- exit(1);
- }
- LastEmitted = IDEnd;
-
- char Modifier[2] = { 0, 0 };
-
- if (HasCurlyBraces) {
- // If we have curly braces, check for a modifier character. This
- // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
- if (*LastEmitted == ':') {
- ++LastEmitted; // Consume ':' character.
- if (*LastEmitted == 0) {
- cerr << "Bad ${:} expression in inline asm string: '"
- << AsmStr << "'\n";
- exit(1);
- }
-
- Modifier[0] = *LastEmitted;
- ++LastEmitted; // Consume modifier character.
- }
-
- if (*LastEmitted != '}') {
- cerr << "Bad ${} expression in inline asm string: '"
- << AsmStr << "'\n";
- exit(1);
- }
- ++LastEmitted; // Consume '}' character.
- }
-
- if ((unsigned)Val >= NumOperands-1) {
- cerr << "Invalid $ operand number in inline asm string: '"
- << AsmStr << "'\n";
- exit(1);
- }
-
- // Okay, we finally have a value number. Ask the target to print this
- // operand!
- if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
- unsigned OpNo = 1;
-
- bool Error = false;
-
- // Scan to find the machine operand number for the operand.
- for (; Val; --Val) {
- if (OpNo >= MI->getNumOperands()) break;
- unsigned OpFlags = MI->getOperand(OpNo).getImm();
- OpNo += (OpFlags >> 3) + 1;
- }
-
- if (OpNo >= MI->getNumOperands()) {
- Error = true;
- } else {
- unsigned OpFlags = MI->getOperand(OpNo).getImm();
- ++OpNo; // Skip over the ID number.
-
- if (Modifier[0]=='l') // labels are target independent
- printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
- false, false, false);
- else {
- AsmPrinter *AP = const_cast<AsmPrinter*>(this);
- if ((OpFlags & 7) == 4 /*ADDR MODE*/) {
- Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
- Modifier[0] ? Modifier : 0);
- } else {
- Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
- Modifier[0] ? Modifier : 0);
- }
- }
- }
- if (Error) {
- cerr << "Invalid operand found in inline asm: '"
- << AsmStr << "'\n";
- MI->dump();
- exit(1);
- }
- }
- break;
- }
- }
- }
- O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
-}
-
-/// printImplicitDef - This method prints the specified machine instruction
-/// that is an implicit def.
-void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
- O << '\t' << TAI->getCommentString() << " implicit-def: "
- << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
-}
-
-/// printLabel - This method prints a local label used by debug and
-/// exception handling tables.
-void AsmPrinter::printLabel(const MachineInstr *MI) const {
- printLabel(MI->getOperand(0).getImm());
-}
-
-void AsmPrinter::printLabel(unsigned Id) const {
- O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
-}
-
-/// printDeclare - This method prints a local variable declaration used by
-/// debug tables.
-/// FIXME: It doesn't really print anything rather it inserts a DebugVariable
-/// entry into dwarf table.
-void AsmPrinter::printDeclare(const MachineInstr *MI) const {
- int FI = MI->getOperand(0).getIndex();
- GlobalValue *GV = MI->getOperand(1).getGlobal();
- MMI->RecordVariable(GV, FI);
-}
-
-/// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
-/// instruction, using the specified assembler variant. Targets should
-/// overried this to format as appropriate.
-bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
- unsigned AsmVariant, const char *ExtraCode) {
- // Target doesn't support this yet!
- return true;
-}
-
-bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
- unsigned AsmVariant,
- const char *ExtraCode) {
- // Target doesn't support this yet!
- return true;
-}
-
-/// printBasicBlockLabel - This method prints the label for the specified
-/// MachineBasicBlock
-void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
- bool printAlign,
- bool printColon,
- bool printComment) const {
- if (printAlign) {
- unsigned Align = MBB->getAlignment();
- if (Align)
- EmitAlignment(Log2_32(Align));
- }
-
- O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
- << MBB->getNumber();
- if (printColon)
- O << ':';
- if (printComment && MBB->getBasicBlock())
- O << '\t' << TAI->getCommentString() << ' '
- << MBB->getBasicBlock()->getNameStart();
-}
-
-/// printPICJumpTableSetLabel - This method prints a set label for the
-/// specified MachineBasicBlock for a jumptable entry.
-void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
- const MachineBasicBlock *MBB) const {
- if (!TAI->getSetDirective())
- return;
-
- O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
- << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
- printBasicBlockLabel(MBB, false, false, false);
- O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << uid << '\n';
-}
-
-void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
- const MachineBasicBlock *MBB) const {
- if (!TAI->getSetDirective())
- return;
-
- O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
- << getFunctionNumber() << '_' << uid << '_' << uid2
- << "_set_" << MBB->getNumber() << ',';
- printBasicBlockLabel(MBB, false, false, false);
- O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << uid << '_' << uid2 << '\n';
-}
-
-/// printDataDirective - This method prints the asm directive for the
-/// specified type.
-void AsmPrinter::printDataDirective(const Type *type) {
- const TargetData *TD = TM.getTargetData();
- switch (type->getTypeID()) {
- case Type::IntegerTyID: {
- unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
- if (BitWidth <= 8)
- O << TAI->getData8bitsDirective();
- else if (BitWidth <= 16)
- O << TAI->getData16bitsDirective();
- else if (BitWidth <= 32)
- O << TAI->getData32bitsDirective();
- else if (BitWidth <= 64) {
- assert(TAI->getData64bitsDirective() &&
- "Target cannot handle 64-bit constant exprs!");
- O << TAI->getData64bitsDirective();
- }
- break;
- }
- case Type::PointerTyID:
- if (TD->getPointerSize() == 8) {
- assert(TAI->getData64bitsDirective() &&
- "Target cannot handle 64-bit pointer exprs!");
- O << TAI->getData64bitsDirective();
- } else {
- O << TAI->getData32bitsDirective();
- }
- break;
- case Type::FloatTyID: case Type::DoubleTyID:
- case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
- assert (0 && "Should have already output floating point constant.");
- default:
- assert (0 && "Can't handle printing this type of thing");
- break;
- }
-}
-
-void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
- const char *Prefix) {
- if (Name[0]=='\"')
- O << '\"';
- O << TAI->getPrivateGlobalPrefix();
- if (Prefix) O << Prefix;
- if (Name[0]=='\"')
- O << '\"';
- if (Name[0]=='\"')
- O << Name[1];
- else
- O << Name;
- O << Suffix;
- if (Name[0]=='\"')
- O << '\"';
-}
-
-void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
- printSuffixedName(Name.c_str(), Suffix);
-}
-
-void AsmPrinter::printVisibility(const std::string& Name,
- unsigned Visibility) const {
- if (Visibility == GlobalValue::HiddenVisibility) {
- if (const char *Directive = TAI->getHiddenDirective())
- O << Directive << Name << '\n';
- } else if (Visibility == GlobalValue::ProtectedVisibility) {
- if (const char *Directive = TAI->getProtectedDirective())
- O << Directive << Name << '\n';
- }
-}
-
-GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(Collector *C) {
- if (!C->usesMetadata())
- return 0;
-<<<<<<< HEAD:lib/CodeGen/AsmPrinter.cpp
-
- gcp_iterator GCPI = GCMetadataPrinters.find(C);
- if (GCPI != GCMetadataPrinters.end())
- return GCPI->second;
-
- const char *Name = C->getName().c_str();
-
-=======
-
- gcp_iterator GCPI = GCMetadataPrinters.find(C);
- if (GCPI != GCMetadataPrinters.end())
- return GCPI->second;
-
- const char *Name = C->getName().c_str();
-
->>>>>>> Factor out asmprinters from collector interface.:lib/CodeGen/AsmPrinter.cpp
- for (GCMetadataPrinterRegistry::iterator
- I = GCMetadataPrinterRegistry::begin(),
- E = GCMetadataPrinterRegistry::end(); I != E; ++I)
- if (strcmp(Name, I->getName()) == 0) {
- GCMetadataPrinter *GCP = I->instantiate();
- GCP->Coll = C;
- GCMetadataPrinters.insert(std::make_pair(C, GCP));
- return GCP;
- }
-<<<<<<< HEAD:lib/CodeGen/AsmPrinter.cpp
-
-=======
-
->>>>>>> Factor out asmprinters from collector interface.:lib/CodeGen/AsmPrinter.cpp
- cerr << "no GCMetadataPrinter registered for collector: " << Name << "\n";
- abort();
-}
Copied: llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp (from r54884, llvm/trunk/lib/CodeGen/AsmPrinter.cpp)
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp?p2=llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp&p1=llvm/trunk/lib/CodeGen/AsmPrinter.cpp&r1=54884&r2=54885&rev=54885&view=diff
==============================================================================
(empty)
Copied: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfWriter.cpp (from r54884, llvm/trunk/lib/CodeGen/DwarfWriter.cpp)
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfWriter.cpp?p2=llvm/trunk/lib/CodeGen/AsmPrinter/DwarfWriter.cpp&p1=llvm/trunk/lib/CodeGen/DwarfWriter.cpp&r1=54884&r2=54885&rev=54885&view=diff
==============================================================================
(empty)
Added: llvm/trunk/lib/CodeGen/AsmPrinter/Makefile
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/Makefile?rev=54885&view=auto
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/Makefile (added)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/Makefile Sun Aug 17 08:53:04 2008
@@ -0,0 +1,15 @@
+##===- lib/CodeGen/SelectionDAG/Makefile -------------------*- Makefile -*-===##
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+LEVEL = ../../..
+LIBRARYNAME = LLVMAsmPrinter
+PARALLEL_DIRS =
+BUILD_ARCHIVE = 1
+DONT_BUILD_RELINKED = 1
+
+include $(LEVEL)/Makefile.common
Added: llvm/trunk/lib/CodeGen/AsmPrinter/OcamlGCMetadataPrinter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/OcamlGCMetadataPrinter.cpp?rev=54885&view=auto
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/OcamlGCMetadataPrinter.cpp (added)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/OcamlGCMetadataPrinter.cpp Sun Aug 17 08:53:04 2008
@@ -0,0 +1,157 @@
+//===-- OcamlGCMetadataPrinter.cpp - Ocaml frametable emitter -------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements gc metadata printing for the llvm.gc* intrinsics
+// compatible with Objective Caml 3.10.0, which uses a liveness-accurate static
+// stack map.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/Collectors.h"
+#include "llvm/CodeGen/Collector.h"
+#include "llvm/Module.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+
+using namespace llvm;
+
+namespace {
+ class VISIBILITY_HIDDEN OcamlGCMetadataPrinter : public GCMetadataPrinter {
+ public:
+ void beginAssembly(std::ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI);
+ void finishAssembly(std::ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI);
+ };
+}
+
+static GCMetadataPrinterRegistry::Add<OcamlGCMetadataPrinter>
+X("ocaml", "ocaml 3.10-compatible collector");
+
+static void EmitCamlGlobal(const Module &M, std::ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI, const char *Id) {
+ const std::string &MId = M.getModuleIdentifier();
+
+ std::string Mangled;
+ Mangled += TAI.getGlobalPrefix();
+ Mangled += "caml";
+ size_t Letter = Mangled.size();
+ Mangled.append(MId.begin(), std::find(MId.begin(), MId.end(), '.'));
+ Mangled += "__";
+ Mangled += Id;
+
+ // Capitalize the first letter of the module name.
+ Mangled[Letter] = toupper(Mangled[Letter]);
+
+ if (const char *GlobalDirective = TAI.getGlobalDirective())
+ OS << GlobalDirective << Mangled << "\n";
+ OS << Mangled << ":\n";
+}
+
+void OcamlGCMetadataPrinter::beginAssembly(std::ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI) {
+ AP.SwitchToTextSection(TAI.getTextSection());
+ EmitCamlGlobal(getModule(), OS, AP, TAI, "code_begin");
+
+ AP.SwitchToDataSection(TAI.getDataSection());
+ EmitCamlGlobal(getModule(), OS, AP, TAI, "data_begin");
+}
+
+/// emitAssembly - Print the frametable. The ocaml frametable format is thus:
+///
+/// extern "C" struct align(sizeof(intptr_t)) {
+/// uint16_t NumDescriptors;
+/// struct align(sizeof(intptr_t)) {
+/// void *ReturnAddress;
+/// uint16_t FrameSize;
+/// uint16_t NumLiveOffsets;
+/// uint16_t LiveOffsets[NumLiveOffsets];
+/// } Descriptors[NumDescriptors];
+/// } caml${module}__frametable;
+///
+/// Note that this precludes programs from stack frames larger than 64K
+/// (FrameSize and LiveOffsets would overflow). FrameTablePrinter will abort if
+/// either condition is detected in a function which uses the collector.
+///
+void OcamlGCMetadataPrinter::finishAssembly(std::ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI) {
+ const char *AddressDirective;
+ int AddressAlignLog;
+ if (AP.TM.getTargetData()->getPointerSize() == sizeof(int32_t)) {
+ AddressDirective = TAI.getData32bitsDirective();
+ AddressAlignLog = 2;
+ } else {
+ AddressDirective = TAI.getData64bitsDirective();
+ AddressAlignLog = 3;
+ }
+
+ AP.SwitchToTextSection(TAI.getTextSection());
+ EmitCamlGlobal(getModule(), OS, AP, TAI, "code_end");
+
+ AP.SwitchToDataSection(TAI.getDataSection());
+ EmitCamlGlobal(getModule(), OS, AP, TAI, "data_end");
+
+ OS << AddressDirective << 0; // FIXME: Why does ocaml emit this??
+ AP.EOL();
+
+ AP.SwitchToDataSection(TAI.getDataSection());
+ EmitCamlGlobal(getModule(), OS, AP, TAI, "frametable");
+
+ for (iterator FI = begin(), FE = end(); FI != FE; ++FI) {
+ CollectorMetadata &MD = **FI;
+
+ OS << "\t" << TAI.getCommentString() << " live roots for "
+ << MD.getFunction().getNameStart() << "\n";
+
+ for (CollectorMetadata::iterator PI = MD.begin(),
+ PE = MD.end(); PI != PE; ++PI) {
+
+ uint64_t FrameSize = MD.getFrameSize();
+ if (FrameSize >= 1<<16) {
+ cerr << "Function '" << MD.getFunction().getNameStart()
+ << "' is too large for the ocaml collector! "
+ << "Frame size " << FrameSize << " >= 65536.\n";
+ abort(); // Very rude!
+ }
+
+ size_t LiveCount = MD.live_size(PI);
+ if (LiveCount >= 1<<16) {
+ cerr << "Function '" << MD.getFunction().getNameStart()
+ << "' is too large for the ocaml collector! "
+ << "Live root count " << LiveCount << " >= 65536.\n";
+ abort(); // Very rude!
+ }
+
+ OS << AddressDirective
+ << TAI.getPrivateGlobalPrefix() << "label" << PI->Num;
+ AP.EOL("call return address");
+
+ AP.EmitInt16(FrameSize);
+ AP.EOL("stack frame size");
+
+ AP.EmitInt16(LiveCount);
+ AP.EOL("live root count");
+
+ for (CollectorMetadata::live_iterator LI = MD.live_begin(PI),
+ LE = MD.live_end(PI);
+ LI != LE; ++LI) {
+ assert(LI->StackOffset < 1<<16 &&
+ "GC root stack offset is outside of fixed stack frame and out "
+ "of range for Ocaml collector!");
+
+ OS << "\t.word\t" << LI->StackOffset;
+ AP.EOL("stack offset");
+ }
+
+ AP.EmitAlignment(AddressAlignLog);
+ }
+ }
+}
Removed: llvm/trunk/lib/CodeGen/DwarfWriter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/DwarfWriter.cpp?rev=54884&view=auto
==============================================================================
--- llvm/trunk/lib/CodeGen/DwarfWriter.cpp (original)
+++ llvm/trunk/lib/CodeGen/DwarfWriter.cpp (removed)
@@ -1,3930 +0,0 @@
-//===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework ----------*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains support for writing dwarf info into asm files.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/DwarfWriter.h"
-
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/FoldingSet.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/UniqueVector.h"
-#include "llvm/Module.h"
-#include "llvm/Type.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineLocation.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/Dwarf.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/DataTypes.h"
-#include "llvm/Support/Mangler.h"
-#include "llvm/System/Path.h"
-#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetFrameInfo.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
-#include <ostream>
-#include <string>
-using namespace llvm;
-using namespace llvm::dwarf;
-
-namespace llvm {
-
-//===----------------------------------------------------------------------===//
-
-/// Configuration values for initial hash set sizes (log2).
-///
-static const unsigned InitDiesSetSize = 9; // 512
-static const unsigned InitAbbreviationsSetSize = 9; // 512
-static const unsigned InitValuesSetSize = 9; // 512
-
-//===----------------------------------------------------------------------===//
-/// Forward declarations.
-///
-class DIE;
-class DIEValue;
-
-//===----------------------------------------------------------------------===//
-/// DWLabel - Labels are used to track locations in the assembler file.
-/// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim,
-/// where the tag is a category of label (Ex. location) and number is a value
-/// unique in that category.
-class DWLabel {
-public:
- /// Tag - Label category tag. Should always be a staticly declared C string.
- ///
- const char *Tag;
-
- /// Number - Value to make label unique.
- ///
- unsigned Number;
-
- DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
-
- void Profile(FoldingSetNodeID &ID) const {
- ID.AddString(std::string(Tag));
- ID.AddInteger(Number);
- }
-
-#ifndef NDEBUG
- void print(std::ostream *O) const {
- if (O) print(*O);
- }
- void print(std::ostream &O) const {
- O << "." << Tag;
- if (Number) O << Number;
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
-/// Dwarf abbreviation.
-class DIEAbbrevData {
-private:
- /// Attribute - Dwarf attribute code.
- ///
- unsigned Attribute;
-
- /// Form - Dwarf form code.
- ///
- unsigned Form;
-
-public:
- DIEAbbrevData(unsigned A, unsigned F)
- : Attribute(A)
- , Form(F)
- {}
-
- // Accessors.
- unsigned getAttribute() const { return Attribute; }
- unsigned getForm() const { return Form; }
-
- /// Profile - Used to gather unique data for the abbreviation folding set.
- ///
- void Profile(FoldingSetNodeID &ID)const {
- ID.AddInteger(Attribute);
- ID.AddInteger(Form);
- }
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
-/// information object.
-class DIEAbbrev : public FoldingSetNode {
-private:
- /// Tag - Dwarf tag code.
- ///
- unsigned Tag;
-
- /// Unique number for node.
- ///
- unsigned Number;
-
- /// ChildrenFlag - Dwarf children flag.
- ///
- unsigned ChildrenFlag;
-
- /// Data - Raw data bytes for abbreviation.
- ///
- SmallVector<DIEAbbrevData, 8> Data;
-
-public:
-
- DIEAbbrev(unsigned T, unsigned C)
- : Tag(T)
- , ChildrenFlag(C)
- , Data()
- {}
- ~DIEAbbrev() {}
-
- // Accessors.
- unsigned getTag() const { return Tag; }
- unsigned getNumber() const { return Number; }
- unsigned getChildrenFlag() const { return ChildrenFlag; }
- const SmallVector<DIEAbbrevData, 8> &getData() const { return Data; }
- void setTag(unsigned T) { Tag = T; }
- void setChildrenFlag(unsigned CF) { ChildrenFlag = CF; }
- void setNumber(unsigned N) { Number = N; }
-
- /// AddAttribute - Adds another set of attribute information to the
- /// abbreviation.
- void AddAttribute(unsigned Attribute, unsigned Form) {
- Data.push_back(DIEAbbrevData(Attribute, Form));
- }
-
- /// AddFirstAttribute - Adds a set of attribute information to the front
- /// of the abbreviation.
- void AddFirstAttribute(unsigned Attribute, unsigned Form) {
- Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form));
- }
-
- /// Profile - Used to gather unique data for the abbreviation folding set.
- ///
- void Profile(FoldingSetNodeID &ID) {
- ID.AddInteger(Tag);
- ID.AddInteger(ChildrenFlag);
-
- // For each attribute description.
- for (unsigned i = 0, N = Data.size(); i < N; ++i)
- Data[i].Profile(ID);
- }
-
- /// Emit - Print the abbreviation using the specified Dwarf writer.
- ///
- void Emit(const DwarfDebug &DD) const;
-
-#ifndef NDEBUG
- void print(std::ostream *O) {
- if (O) print(*O);
- }
- void print(std::ostream &O);
- void dump();
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIE - A structured debug information entry. Has an abbreviation which
-/// describes it's organization.
-class DIE : public FoldingSetNode {
-protected:
- /// Abbrev - Buffer for constructing abbreviation.
- ///
- DIEAbbrev Abbrev;
-
- /// Offset - Offset in debug info section.
- ///
- unsigned Offset;
-
- /// Size - Size of instance + children.
- ///
- unsigned Size;
-
- /// Children DIEs.
- ///
- std::vector<DIE *> Children;
-
- /// Attributes values.
- ///
- SmallVector<DIEValue*, 32> Values;
-
-public:
- explicit DIE(unsigned Tag)
- : Abbrev(Tag, DW_CHILDREN_no)
- , Offset(0)
- , Size(0)
- , Children()
- , Values()
- {}
- virtual ~DIE();
-
- // Accessors.
- DIEAbbrev &getAbbrev() { return Abbrev; }
- unsigned getAbbrevNumber() const {
- return Abbrev.getNumber();
- }
- unsigned getTag() const { return Abbrev.getTag(); }
- unsigned getOffset() const { return Offset; }
- unsigned getSize() const { return Size; }
- const std::vector<DIE *> &getChildren() const { return Children; }
- SmallVector<DIEValue*, 32> &getValues() { return Values; }
- void setTag(unsigned Tag) { Abbrev.setTag(Tag); }
- void setOffset(unsigned O) { Offset = O; }
- void setSize(unsigned S) { Size = S; }
-
- /// AddValue - Add a value and attributes to a DIE.
- ///
- void AddValue(unsigned Attribute, unsigned Form, DIEValue *Value) {
- Abbrev.AddAttribute(Attribute, Form);
- Values.push_back(Value);
- }
-
- /// SiblingOffset - Return the offset of the debug information entry's
- /// sibling.
- unsigned SiblingOffset() const { return Offset + Size; }
-
- /// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
- ///
- void AddSiblingOffset();
-
- /// AddChild - Add a child to the DIE.
- ///
- void AddChild(DIE *Child) {
- Abbrev.setChildrenFlag(DW_CHILDREN_yes);
- Children.push_back(Child);
- }
-
- /// Detach - Detaches objects connected to it after copying.
- ///
- void Detach() {
- Children.clear();
- }
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- void Profile(FoldingSetNodeID &ID) ;
-
-#ifndef NDEBUG
- void print(std::ostream *O, unsigned IncIndent = 0) {
- if (O) print(*O, IncIndent);
- }
- void print(std::ostream &O, unsigned IncIndent = 0);
- void dump();
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEValue - A debug information entry value.
-///
-class DIEValue : public FoldingSetNode {
-public:
- enum {
- isInteger,
- isString,
- isLabel,
- isAsIsLabel,
- isSectionOffset,
- isDelta,
- isEntry,
- isBlock
- };
-
- /// Type - Type of data stored in the value.
- ///
- unsigned Type;
-
- explicit DIEValue(unsigned T)
- : Type(T)
- {}
- virtual ~DIEValue() {}
-
- // Accessors
- unsigned getType() const { return Type; }
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEValue *) { return true; }
-
- /// EmitValue - Emit value via the Dwarf writer.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form) = 0;
-
- /// SizeOf - Return the size of a value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const = 0;
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- virtual void Profile(FoldingSetNodeID &ID) = 0;
-
-#ifndef NDEBUG
- void print(std::ostream *O) {
- if (O) print(*O);
- }
- virtual void print(std::ostream &O) = 0;
- void dump();
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DWInteger - An integer value DIE.
-///
-class DIEInteger : public DIEValue {
-private:
- uint64_t Integer;
-
-public:
- explicit DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEInteger *) { return true; }
- static bool classof(const DIEValue *I) { return I->Type == isInteger; }
-
- /// BestForm - Choose the best form for integer.
- ///
- static unsigned BestForm(bool IsSigned, uint64_t Integer) {
- if (IsSigned) {
- if ((char)Integer == (signed)Integer) return DW_FORM_data1;
- if ((short)Integer == (signed)Integer) return DW_FORM_data2;
- if ((int)Integer == (signed)Integer) return DW_FORM_data4;
- } else {
- if ((unsigned char)Integer == Integer) return DW_FORM_data1;
- if ((unsigned short)Integer == Integer) return DW_FORM_data2;
- if ((unsigned int)Integer == Integer) return DW_FORM_data4;
- }
- return DW_FORM_data8;
- }
-
- /// EmitValue - Emit integer of appropriate size.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of integer value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, unsigned Integer) {
- ID.AddInteger(isInteger);
- ID.AddInteger(Integer);
- }
- virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Integer); }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Int: " << (int64_t)Integer
- << " 0x" << std::hex << Integer << std::dec;
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEString - A string value DIE.
-///
-class DIEString : public DIEValue {
-public:
- const std::string String;
-
- explicit DIEString(const std::string &S) : DIEValue(isString), String(S) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEString *) { return true; }
- static bool classof(const DIEValue *S) { return S->Type == isString; }
-
- /// EmitValue - Emit string value.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of string value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
- return String.size() + sizeof(char); // sizeof('\0');
- }
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, const std::string &String) {
- ID.AddInteger(isString);
- ID.AddString(String);
- }
- virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, String); }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Str: \"" << String << "\"";
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEDwarfLabel - A Dwarf internal label expression DIE.
-//
-class DIEDwarfLabel : public DIEValue {
-public:
-
- const DWLabel Label;
-
- explicit DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEDwarfLabel *) { return true; }
- static bool classof(const DIEValue *L) { return L->Type == isLabel; }
-
- /// EmitValue - Emit label value.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of label value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, const DWLabel &Label) {
- ID.AddInteger(isLabel);
- Label.Profile(ID);
- }
- virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Lbl: ";
- Label.print(O);
- }
-#endif
-};
-
-
-//===----------------------------------------------------------------------===//
-/// DIEObjectLabel - A label to an object in code or data.
-//
-class DIEObjectLabel : public DIEValue {
-public:
- const std::string Label;
-
- explicit DIEObjectLabel(const std::string &L)
- : DIEValue(isAsIsLabel), Label(L) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEObjectLabel *) { return true; }
- static bool classof(const DIEValue *L) { return L->Type == isAsIsLabel; }
-
- /// EmitValue - Emit label value.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of label value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, const std::string &Label) {
- ID.AddInteger(isAsIsLabel);
- ID.AddString(Label);
- }
- virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Obj: " << Label;
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIESectionOffset - A section offset DIE.
-//
-class DIESectionOffset : public DIEValue {
-public:
- const DWLabel Label;
- const DWLabel Section;
- bool IsEH : 1;
- bool UseSet : 1;
-
- DIESectionOffset(const DWLabel &Lab, const DWLabel &Sec,
- bool isEH = false, bool useSet = true)
- : DIEValue(isSectionOffset), Label(Lab), Section(Sec),
- IsEH(isEH), UseSet(useSet) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIESectionOffset *) { return true; }
- static bool classof(const DIEValue *D) { return D->Type == isSectionOffset; }
-
- /// EmitValue - Emit section offset.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of section offset value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, const DWLabel &Label,
- const DWLabel &Section) {
- ID.AddInteger(isSectionOffset);
- Label.Profile(ID);
- Section.Profile(ID);
- // IsEH and UseSet are specific to the Label/Section that we will emit
- // the offset for; so Label/Section are enough for uniqueness.
- }
- virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label, Section); }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Off: ";
- Label.print(O);
- O << "-";
- Section.print(O);
- O << "-" << IsEH << "-" << UseSet;
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEDelta - A simple label difference DIE.
-///
-class DIEDelta : public DIEValue {
-public:
- const DWLabel LabelHi;
- const DWLabel LabelLo;
-
- DIEDelta(const DWLabel &Hi, const DWLabel &Lo)
- : DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEDelta *) { return true; }
- static bool classof(const DIEValue *D) { return D->Type == isDelta; }
-
- /// EmitValue - Emit delta value.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of delta value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, const DWLabel &LabelHi,
- const DWLabel &LabelLo) {
- ID.AddInteger(isDelta);
- LabelHi.Profile(ID);
- LabelLo.Profile(ID);
- }
- virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, LabelHi, LabelLo); }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Del: ";
- LabelHi.print(O);
- O << "-";
- LabelLo.print(O);
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEntry - A pointer to another debug information entry. An instance of this
-/// class can also be used as a proxy for a debug information entry not yet
-/// defined (ie. types.)
-class DIEntry : public DIEValue {
-public:
- DIE *Entry;
-
- explicit DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEntry *) { return true; }
- static bool classof(const DIEValue *E) { return E->Type == isEntry; }
-
- /// EmitValue - Emit debug information entry offset.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of debug information entry in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
- return sizeof(int32_t);
- }
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, DIE *Entry) {
- ID.AddInteger(isEntry);
- ID.AddPointer(Entry);
- }
- virtual void Profile(FoldingSetNodeID &ID) {
- ID.AddInteger(isEntry);
-
- if (Entry) {
- ID.AddPointer(Entry);
- } else {
- ID.AddPointer(this);
- }
- }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Die: 0x" << std::hex << (intptr_t)Entry << std::dec;
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEBlock - A block of values. Primarily used for location expressions.
-//
-class DIEBlock : public DIEValue, public DIE {
-public:
- unsigned Size; // Size in bytes excluding size header.
-
- DIEBlock()
- : DIEValue(isBlock)
- , DIE(0)
- , Size(0)
- {}
- ~DIEBlock() {
- }
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEBlock *) { return true; }
- static bool classof(const DIEValue *E) { return E->Type == isBlock; }
-
- /// ComputeSize - calculate the size of the block.
- ///
- unsigned ComputeSize(DwarfDebug &DD);
-
- /// BestForm - Choose the best form for data.
- ///
- unsigned BestForm() const {
- if ((unsigned char)Size == Size) return DW_FORM_block1;
- if ((unsigned short)Size == Size) return DW_FORM_block2;
- if ((unsigned int)Size == Size) return DW_FORM_block4;
- return DW_FORM_block;
- }
-
- /// EmitValue - Emit block data.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of block data in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- virtual void Profile(FoldingSetNodeID &ID) {
- ID.AddInteger(isBlock);
- DIE::Profile(ID);
- }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Blk: ";
- DIE::print(O, 5);
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// CompileUnit - This dwarf writer support class manages information associate
-/// with a source file.
-class CompileUnit {
-private:
- /// Desc - Compile unit debug descriptor.
- ///
- CompileUnitDesc *Desc;
-
- /// ID - File identifier for source.
- ///
- unsigned ID;
-
- /// Die - Compile unit debug information entry.
- ///
- DIE *Die;
-
- /// DescToDieMap - Tracks the mapping of unit level debug informaton
- /// descriptors to debug information entries.
- std::map<DebugInfoDesc *, DIE *> DescToDieMap;
-
- /// DescToDIEntryMap - Tracks the mapping of unit level debug informaton
- /// descriptors to debug information entries using a DIEntry proxy.
- std::map<DebugInfoDesc *, DIEntry *> DescToDIEntryMap;
-
- /// Globals - A map of globally visible named entities for this unit.
- ///
- std::map<std::string, DIE *> Globals;
-
- /// DiesSet - Used to uniquely define dies within the compile unit.
- ///
- FoldingSet<DIE> DiesSet;
-
- /// Dies - List of all dies in the compile unit.
- ///
- std::vector<DIE *> Dies;
-
-public:
- CompileUnit(CompileUnitDesc *CUD, unsigned I, DIE *D)
- : Desc(CUD)
- , ID(I)
- , Die(D)
- , DescToDieMap()
- , DescToDIEntryMap()
- , Globals()
- , DiesSet(InitDiesSetSize)
- , Dies()
- {}
-
- ~CompileUnit() {
- delete Die;
-
- for (unsigned i = 0, N = Dies.size(); i < N; ++i)
- delete Dies[i];
- }
-
- // Accessors.
- CompileUnitDesc *getDesc() const { return Desc; }
- unsigned getID() const { return ID; }
- DIE* getDie() const { return Die; }
- std::map<std::string, DIE *> &getGlobals() { return Globals; }
-
- /// hasContent - Return true if this compile unit has something to write out.
- ///
- bool hasContent() const {
- return !Die->getChildren().empty();
- }
-
- /// AddGlobal - Add a new global entity to the compile unit.
- ///
- void AddGlobal(const std::string &Name, DIE *Die) {
- Globals[Name] = Die;
- }
-
- /// getDieMapSlotFor - Returns the debug information entry map slot for the
- /// specified debug descriptor.
- DIE *&getDieMapSlotFor(DebugInfoDesc *DID) {
- return DescToDieMap[DID];
- }
-
- /// getDIEntrySlotFor - Returns the debug information entry proxy slot for the
- /// specified debug descriptor.
- DIEntry *&getDIEntrySlotFor(DebugInfoDesc *DID) {
- return DescToDIEntryMap[DID];
- }
-
- /// AddDie - Adds or interns the DIE to the compile unit.
- ///
- DIE *AddDie(DIE &Buffer) {
- FoldingSetNodeID ID;
- Buffer.Profile(ID);
- void *Where;
- DIE *Die = DiesSet.FindNodeOrInsertPos(ID, Where);
-
- if (!Die) {
- Die = new DIE(Buffer);
- DiesSet.InsertNode(Die, Where);
- this->Die->AddChild(Die);
- Buffer.Detach();
- }
-
- return Die;
- }
-};
-
-//===----------------------------------------------------------------------===//
-/// Dwarf - Emits general Dwarf directives.
-///
-class Dwarf {
-
-protected:
-
- //===--------------------------------------------------------------------===//
- // Core attributes used by the Dwarf writer.
- //
-
- //
- /// O - Stream to .s file.
- ///
- std::ostream &O;
-
- /// Asm - Target of Dwarf emission.
- ///
- AsmPrinter *Asm;
-
- /// TAI - Target asm information.
- const TargetAsmInfo *TAI;
-
- /// TD - Target data.
- const TargetData *TD;
-
- /// RI - Register Information.
- const TargetRegisterInfo *RI;
-
- /// M - Current module.
- ///
- Module *M;
-
- /// MF - Current machine function.
- ///
- MachineFunction *MF;
-
- /// MMI - Collected machine module information.
- ///
- MachineModuleInfo *MMI;
-
- /// SubprogramCount - The running count of functions being compiled.
- ///
- unsigned SubprogramCount;
-
- /// Flavor - A unique string indicating what dwarf producer this is, used to
- /// unique labels.
- const char * const Flavor;
-
- unsigned SetCounter;
- Dwarf(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T,
- const char *flavor)
- : O(OS)
- , Asm(A)
- , TAI(T)
- , TD(Asm->TM.getTargetData())
- , RI(Asm->TM.getRegisterInfo())
- , M(NULL)
- , MF(NULL)
- , MMI(NULL)
- , SubprogramCount(0)
- , Flavor(flavor)
- , SetCounter(1)
- {
- }
-
-public:
-
- //===--------------------------------------------------------------------===//
- // Accessors.
- //
- AsmPrinter *getAsm() const { return Asm; }
- MachineModuleInfo *getMMI() const { return MMI; }
- const TargetAsmInfo *getTargetAsmInfo() const { return TAI; }
- const TargetData *getTargetData() const { return TD; }
-
- void PrintRelDirective(bool Force32Bit = false, bool isInSection = false)
- const {
- if (isInSection && TAI->getDwarfSectionOffsetDirective())
- O << TAI->getDwarfSectionOffsetDirective();
- else if (Force32Bit || TD->getPointerSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
- }
-
- /// PrintLabelName - Print label name in form used by Dwarf writer.
- ///
- void PrintLabelName(DWLabel Label) const {
- PrintLabelName(Label.Tag, Label.Number);
- }
- void PrintLabelName(const char *Tag, unsigned Number) const {
- O << TAI->getPrivateGlobalPrefix() << Tag;
- if (Number) O << Number;
- }
-
- void PrintLabelName(const char *Tag, unsigned Number,
- const char *Suffix) const {
- O << TAI->getPrivateGlobalPrefix() << Tag;
- if (Number) O << Number;
- O << Suffix;
- }
-
- /// EmitLabel - Emit location label for internal use by Dwarf.
- ///
- void EmitLabel(DWLabel Label) const {
- EmitLabel(Label.Tag, Label.Number);
- }
- void EmitLabel(const char *Tag, unsigned Number) const {
- PrintLabelName(Tag, Number);
- O << ":\n";
- }
-
- /// EmitReference - Emit a reference to a label.
- ///
- void EmitReference(DWLabel Label, bool IsPCRelative = false,
- bool Force32Bit = false) const {
- EmitReference(Label.Tag, Label.Number, IsPCRelative, Force32Bit);
- }
- void EmitReference(const char *Tag, unsigned Number,
- bool IsPCRelative = false, bool Force32Bit = false) const {
- PrintRelDirective(Force32Bit);
- PrintLabelName(Tag, Number);
-
- if (IsPCRelative) O << "-" << TAI->getPCSymbol();
- }
- void EmitReference(const std::string &Name, bool IsPCRelative = false,
- bool Force32Bit = false) const {
- PrintRelDirective(Force32Bit);
-
- O << Name;
-
- if (IsPCRelative) O << "-" << TAI->getPCSymbol();
- }
-
- /// EmitDifference - Emit the difference between two labels. Some
- /// assemblers do not behave with absolute expressions with data directives,
- /// so there is an option (needsSet) to use an intermediary set expression.
- void EmitDifference(DWLabel LabelHi, DWLabel LabelLo,
- bool IsSmall = false) {
- EmitDifference(LabelHi.Tag, LabelHi.Number,
- LabelLo.Tag, LabelLo.Number,
- IsSmall);
- }
- void EmitDifference(const char *TagHi, unsigned NumberHi,
- const char *TagLo, unsigned NumberLo,
- bool IsSmall = false) {
- if (TAI->needsSet()) {
- O << "\t.set\t";
- PrintLabelName("set", SetCounter, Flavor);
- O << ",";
- PrintLabelName(TagHi, NumberHi);
- O << "-";
- PrintLabelName(TagLo, NumberLo);
- O << "\n";
-
- PrintRelDirective(IsSmall);
- PrintLabelName("set", SetCounter, Flavor);
- ++SetCounter;
- } else {
- PrintRelDirective(IsSmall);
-
- PrintLabelName(TagHi, NumberHi);
- O << "-";
- PrintLabelName(TagLo, NumberLo);
- }
- }
-
- void EmitSectionOffset(const char* Label, const char* Section,
- unsigned LabelNumber, unsigned SectionNumber,
- bool IsSmall = false, bool isEH = false,
- bool useSet = true) {
- bool printAbsolute = false;
- if (isEH)
- printAbsolute = TAI->isAbsoluteEHSectionOffsets();
- else
- printAbsolute = TAI->isAbsoluteDebugSectionOffsets();
-
- if (TAI->needsSet() && useSet) {
- O << "\t.set\t";
- PrintLabelName("set", SetCounter, Flavor);
- O << ",";
- PrintLabelName(Label, LabelNumber);
-
- if (!printAbsolute) {
- O << "-";
- PrintLabelName(Section, SectionNumber);
- }
- O << "\n";
-
- PrintRelDirective(IsSmall);
-
- PrintLabelName("set", SetCounter, Flavor);
- ++SetCounter;
- } else {
- PrintRelDirective(IsSmall, true);
-
- PrintLabelName(Label, LabelNumber);
-
- if (!printAbsolute) {
- O << "-";
- PrintLabelName(Section, SectionNumber);
- }
- }
- }
-
- /// EmitFrameMoves - Emit frame instructions to describe the layout of the
- /// frame.
- void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
- const std::vector<MachineMove> &Moves, bool isEH) {
- int stackGrowth =
- Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
- TargetFrameInfo::StackGrowsUp ?
- TD->getPointerSize() : -TD->getPointerSize();
- bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0;
-
- for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
- const MachineMove &Move = Moves[i];
- unsigned LabelID = Move.getLabelID();
-
- if (LabelID) {
- LabelID = MMI->MappedLabel(LabelID);
-
- // Throw out move if the label is invalid.
- if (!LabelID) continue;
- }
-
- const MachineLocation &Dst = Move.getDestination();
- const MachineLocation &Src = Move.getSource();
-
- // Advance row if new location.
- if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) {
- Asm->EmitInt8(DW_CFA_advance_loc4);
- Asm->EOL("DW_CFA_advance_loc4");
- EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true);
- Asm->EOL();
-
- BaseLabelID = LabelID;
- BaseLabel = "label";
- IsLocal = true;
- }
-
- // If advancing cfa.
- if (Dst.isRegister() && Dst.getRegister() == MachineLocation::VirtualFP) {
- if (!Src.isRegister()) {
- if (Src.getRegister() == MachineLocation::VirtualFP) {
- Asm->EmitInt8(DW_CFA_def_cfa_offset);
- Asm->EOL("DW_CFA_def_cfa_offset");
- } else {
- Asm->EmitInt8(DW_CFA_def_cfa);
- Asm->EOL("DW_CFA_def_cfa");
- Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getRegister(), isEH));
- Asm->EOL("Register");
- }
-
- int Offset = -Src.getOffset();
-
- Asm->EmitULEB128Bytes(Offset);
- Asm->EOL("Offset");
- } else {
- assert(0 && "Machine move no supported yet.");
- }
- } else if (Src.isRegister() &&
- Src.getRegister() == MachineLocation::VirtualFP) {
- if (Dst.isRegister()) {
- Asm->EmitInt8(DW_CFA_def_cfa_register);
- Asm->EOL("DW_CFA_def_cfa_register");
- Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getRegister(), isEH));
- Asm->EOL("Register");
- } else {
- assert(0 && "Machine move no supported yet.");
- }
- } else {
- unsigned Reg = RI->getDwarfRegNum(Src.getRegister(), isEH);
- int Offset = Dst.getOffset() / stackGrowth;
-
- if (Offset < 0) {
- Asm->EmitInt8(DW_CFA_offset_extended_sf);
- Asm->EOL("DW_CFA_offset_extended_sf");
- Asm->EmitULEB128Bytes(Reg);
- Asm->EOL("Reg");
- Asm->EmitSLEB128Bytes(Offset);
- Asm->EOL("Offset");
- } else if (Reg < 64) {
- Asm->EmitInt8(DW_CFA_offset + Reg);
- if (VerboseAsm)
- Asm->EOL("DW_CFA_offset + Reg (" + utostr(Reg) + ")");
- else
- Asm->EOL();
- Asm->EmitULEB128Bytes(Offset);
- Asm->EOL("Offset");
- } else {
- Asm->EmitInt8(DW_CFA_offset_extended);
- Asm->EOL("DW_CFA_offset_extended");
- Asm->EmitULEB128Bytes(Reg);
- Asm->EOL("Reg");
- Asm->EmitULEB128Bytes(Offset);
- Asm->EOL("Offset");
- }
- }
- }
- }
-
-};
-
-//===----------------------------------------------------------------------===//
-/// DwarfDebug - Emits Dwarf debug directives.
-///
-class DwarfDebug : public Dwarf {
-
-private:
- //===--------------------------------------------------------------------===//
- // Attributes used to construct specific Dwarf sections.
- //
-
- /// CompileUnits - All the compile units involved in this build. The index
- /// of each entry in this vector corresponds to the sources in MMI.
- std::vector<CompileUnit *> CompileUnits;
-
- /// AbbreviationsSet - Used to uniquely define abbreviations.
- ///
- FoldingSet<DIEAbbrev> AbbreviationsSet;
-
- /// Abbreviations - A list of all the unique abbreviations in use.
- ///
- std::vector<DIEAbbrev *> Abbreviations;
-
- /// ValuesSet - Used to uniquely define values.
- ///
- FoldingSet<DIEValue> ValuesSet;
-
- /// Values - A list of all the unique values in use.
- ///
- std::vector<DIEValue *> Values;
-
- /// StringPool - A UniqueVector of strings used by indirect references.
- ///
- UniqueVector<std::string> StringPool;
-
- /// UnitMap - Map debug information descriptor to compile unit.
- ///
- std::map<DebugInfoDesc *, CompileUnit *> DescToUnitMap;
-
- /// SectionMap - Provides a unique id per text section.
- ///
- UniqueVector<std::string> SectionMap;
-
- /// SectionSourceLines - Tracks line numbers per text section.
- ///
- std::vector<std::vector<SourceLineInfo> > SectionSourceLines;
-
- /// didInitial - Flag to indicate if initial emission has been done.
- ///
- bool didInitial;
-
- /// shouldEmit - Flag to indicate if debug information should be emitted.
- ///
- bool shouldEmit;
-
- struct FunctionDebugFrameInfo {
- unsigned Number;
- std::vector<MachineMove> Moves;
-
- FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M):
- Number(Num), Moves(M) { }
- };
-
- std::vector<FunctionDebugFrameInfo> DebugFrames;
-
-public:
-
- /// ShouldEmitDwarf - Returns true if Dwarf declarations should be made.
- ///
- bool ShouldEmitDwarf() const { return shouldEmit; }
-
- /// AssignAbbrevNumber - Define a unique number for the abbreviation.
- ///
- void AssignAbbrevNumber(DIEAbbrev &Abbrev) {
- // Profile the node so that we can make it unique.
- FoldingSetNodeID ID;
- Abbrev.Profile(ID);
-
- // Check the set for priors.
- DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
-
- // If it's newly added.
- if (InSet == &Abbrev) {
- // Add to abbreviation list.
- Abbreviations.push_back(&Abbrev);
- // Assign the vector position + 1 as its number.
- Abbrev.setNumber(Abbreviations.size());
- } else {
- // Assign existing abbreviation number.
- Abbrev.setNumber(InSet->getNumber());
- }
- }
-
- /// NewString - Add a string to the constant pool and returns a label.
- ///
- DWLabel NewString(const std::string &String) {
- unsigned StringID = StringPool.insert(String);
- return DWLabel("string", StringID);
- }
-
- /// NewDIEntry - Creates a new DIEntry to be a proxy for a debug information
- /// entry.
- DIEntry *NewDIEntry(DIE *Entry = NULL) {
- DIEntry *Value;
-
- if (Entry) {
- FoldingSetNodeID ID;
- DIEntry::Profile(ID, Entry);
- void *Where;
- Value = static_cast<DIEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
-
- if (Value) return Value;
-
- Value = new DIEntry(Entry);
- ValuesSet.InsertNode(Value, Where);
- } else {
- Value = new DIEntry(Entry);
- }
-
- Values.push_back(Value);
- return Value;
- }
-
- /// SetDIEntry - Set a DIEntry once the debug information entry is defined.
- ///
- void SetDIEntry(DIEntry *Value, DIE *Entry) {
- Value->Entry = Entry;
- // Add to values set if not already there. If it is, we merely have a
- // duplicate in the values list (no harm.)
- ValuesSet.GetOrInsertNode(Value);
- }
-
- /// AddUInt - Add an unsigned integer attribute data and value.
- ///
- void AddUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer) {
- if (!Form) Form = DIEInteger::BestForm(false, Integer);
-
- FoldingSetNodeID ID;
- DIEInteger::Profile(ID, Integer);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIEInteger(Integer);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddSInt - Add an signed integer attribute data and value.
- ///
- void AddSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer) {
- if (!Form) Form = DIEInteger::BestForm(true, Integer);
-
- FoldingSetNodeID ID;
- DIEInteger::Profile(ID, (uint64_t)Integer);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIEInteger(Integer);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddString - Add a std::string attribute data and value.
- ///
- void AddString(DIE *Die, unsigned Attribute, unsigned Form,
- const std::string &String) {
- FoldingSetNodeID ID;
- DIEString::Profile(ID, String);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIEString(String);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddLabel - Add a Dwarf label attribute data and value.
- ///
- void AddLabel(DIE *Die, unsigned Attribute, unsigned Form,
- const DWLabel &Label) {
- FoldingSetNodeID ID;
- DIEDwarfLabel::Profile(ID, Label);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIEDwarfLabel(Label);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddObjectLabel - Add an non-Dwarf label attribute data and value.
- ///
- void AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form,
- const std::string &Label) {
- FoldingSetNodeID ID;
- DIEObjectLabel::Profile(ID, Label);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIEObjectLabel(Label);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddSectionOffset - Add a section offset label attribute data and value.
- ///
- void AddSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
- const DWLabel &Label, const DWLabel &Section,
- bool isEH = false, bool useSet = true) {
- FoldingSetNodeID ID;
- DIESectionOffset::Profile(ID, Label, Section);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIESectionOffset(Label, Section, isEH, useSet);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddDelta - Add a label delta attribute data and value.
- ///
- void AddDelta(DIE *Die, unsigned Attribute, unsigned Form,
- const DWLabel &Hi, const DWLabel &Lo) {
- FoldingSetNodeID ID;
- DIEDelta::Profile(ID, Hi, Lo);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIEDelta(Hi, Lo);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddDIEntry - Add a DIE attribute data and value.
- ///
- void AddDIEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
- Die->AddValue(Attribute, Form, NewDIEntry(Entry));
- }
-
- /// AddBlock - Add block data.
- ///
- void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block) {
- Block->ComputeSize(*this);
- FoldingSetNodeID ID;
- Block->Profile(ID);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = Block;
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- } else {
- // Already exists, reuse the previous one.
- delete Block;
- Block = cast<DIEBlock>(Value);
- }
-
- Die->AddValue(Attribute, Block->BestForm(), Value);
- }
-
-private:
-
- /// AddSourceLine - Add location information to specified debug information
- /// entry.
- void AddSourceLine(DIE *Die, CompileUnitDesc *File, unsigned Line) {
- if (File && Line) {
- CompileUnit *FileUnit = FindCompileUnit(File);
- unsigned FileID = FileUnit->getID();
- AddUInt(Die, DW_AT_decl_file, 0, FileID);
- AddUInt(Die, DW_AT_decl_line, 0, Line);
- }
- }
-
- /// AddAddress - Add an address attribute to a die based on the location
- /// provided.
- void AddAddress(DIE *Die, unsigned Attribute,
- const MachineLocation &Location) {
- unsigned Reg = RI->getDwarfRegNum(Location.getRegister(), false);
- DIEBlock *Block = new DIEBlock();
-
- if (Location.isRegister()) {
- if (Reg < 32) {
- AddUInt(Block, 0, DW_FORM_data1, DW_OP_reg0 + Reg);
- } else {
- AddUInt(Block, 0, DW_FORM_data1, DW_OP_regx);
- AddUInt(Block, 0, DW_FORM_udata, Reg);
- }
- } else {
- if (Reg < 32) {
- AddUInt(Block, 0, DW_FORM_data1, DW_OP_breg0 + Reg);
- } else {
- AddUInt(Block, 0, DW_FORM_data1, DW_OP_bregx);
- AddUInt(Block, 0, DW_FORM_udata, Reg);
- }
- AddUInt(Block, 0, DW_FORM_sdata, Location.getOffset());
- }
-
- AddBlock(Die, Attribute, 0, Block);
- }
-
- /// AddBasicType - Add a new basic type attribute to the specified entity.
- ///
- void AddBasicType(DIE *Entity, CompileUnit *Unit,
- const std::string &Name,
- unsigned Encoding, unsigned Size) {
- DIE *Die = ConstructBasicType(Unit, Name, Encoding, Size);
- AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, Die);
- }
-
- /// ConstructBasicType - Construct a new basic type.
- ///
- DIE *ConstructBasicType(CompileUnit *Unit,
- const std::string &Name,
- unsigned Encoding, unsigned Size) {
- DIE Buffer(DW_TAG_base_type);
- AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
- AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, Encoding);
- if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
- return Unit->AddDie(Buffer);
- }
-
- /// AddPointerType - Add a new pointer type attribute to the specified entity.
- ///
- void AddPointerType(DIE *Entity, CompileUnit *Unit, const std::string &Name) {
- DIE *Die = ConstructPointerType(Unit, Name);
- AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, Die);
- }
-
- /// ConstructPointerType - Construct a new pointer type.
- ///
- DIE *ConstructPointerType(CompileUnit *Unit, const std::string &Name) {
- DIE Buffer(DW_TAG_pointer_type);
- AddUInt(&Buffer, DW_AT_byte_size, 0, TD->getPointerSize());
- if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
- return Unit->AddDie(Buffer);
- }
-
- /// AddType - Add a new type attribute to the specified entity.
- ///
- void AddType(DIE *Entity, TypeDesc *TyDesc, CompileUnit *Unit) {
- if (!TyDesc) {
- AddBasicType(Entity, Unit, "", DW_ATE_signed, sizeof(int32_t));
- } else {
- // Check for pre-existence.
- DIEntry *&Slot = Unit->getDIEntrySlotFor(TyDesc);
-
- // If it exists then use the existing value.
- if (Slot) {
- Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
- return;
- }
-
- if (SubprogramDesc *SubprogramTy = dyn_cast<SubprogramDesc>(TyDesc)) {
- // FIXME - Not sure why programs and variables are coming through here.
- // Short cut for handling subprogram types (not really a TyDesc.)
- AddPointerType(Entity, Unit, SubprogramTy->getName());
- } else if (GlobalVariableDesc *GlobalTy =
- dyn_cast<GlobalVariableDesc>(TyDesc)) {
- // FIXME - Not sure why programs and variables are coming through here.
- // Short cut for handling global variable types (not really a TyDesc.)
- AddPointerType(Entity, Unit, GlobalTy->getName());
- } else {
- // Set up proxy.
- Slot = NewDIEntry();
-
- // Construct type.
- DIE Buffer(DW_TAG_base_type);
- ConstructType(Buffer, TyDesc, Unit);
-
- // Add debug information entry to entity and unit.
- DIE *Die = Unit->AddDie(Buffer);
- SetDIEntry(Slot, Die);
- Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
- }
- }
- }
-
- /// ConstructType - Adds all the required attributes to the type.
- ///
- void ConstructType(DIE &Buffer, TypeDesc *TyDesc, CompileUnit *Unit) {
- // Get core information.
- const std::string &Name = TyDesc->getName();
- uint64_t Size = TyDesc->getSize() >> 3;
-
- if (BasicTypeDesc *BasicTy = dyn_cast<BasicTypeDesc>(TyDesc)) {
- // Fundamental types like int, float, bool
- Buffer.setTag(DW_TAG_base_type);
- AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, BasicTy->getEncoding());
- } else if (DerivedTypeDesc *DerivedTy = dyn_cast<DerivedTypeDesc>(TyDesc)) {
- // Fetch tag.
- unsigned Tag = DerivedTy->getTag();
- // FIXME - Workaround for templates.
- if (Tag == DW_TAG_inheritance) Tag = DW_TAG_reference_type;
- // Pointers, typedefs et al.
- Buffer.setTag(Tag);
- // Map to main type, void will not have a type.
- if (TypeDesc *FromTy = DerivedTy->getFromType())
- AddType(&Buffer, FromTy, Unit);
- } else if (CompositeTypeDesc *CompTy = dyn_cast<CompositeTypeDesc>(TyDesc)){
- // Fetch tag.
- unsigned Tag = CompTy->getTag();
-
- // Set tag accordingly.
- if (Tag == DW_TAG_vector_type)
- Buffer.setTag(DW_TAG_array_type);
- else
- Buffer.setTag(Tag);
-
- std::vector<DebugInfoDesc *> &Elements = CompTy->getElements();
-
- switch (Tag) {
- case DW_TAG_vector_type:
- AddUInt(&Buffer, DW_AT_GNU_vector, DW_FORM_flag, 1);
- // Fall thru
- case DW_TAG_array_type: {
- // Add element type.
- if (TypeDesc *FromTy = CompTy->getFromType())
- AddType(&Buffer, FromTy, Unit);
-
- // Don't emit size attribute.
- Size = 0;
-
- // Construct an anonymous type for index type.
- DIE *IndexTy = ConstructBasicType(Unit, "", DW_ATE_signed,
- sizeof(int32_t));
-
- // Add subranges to array type.
- for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
- SubrangeDesc *SRD = cast<SubrangeDesc>(Elements[i]);
- int64_t Lo = SRD->getLo();
- int64_t Hi = SRD->getHi();
- DIE *Subrange = new DIE(DW_TAG_subrange_type);
-
- // If a range is available.
- if (Lo != Hi) {
- AddDIEntry(Subrange, DW_AT_type, DW_FORM_ref4, IndexTy);
- // Only add low if non-zero.
- if (Lo) AddSInt(Subrange, DW_AT_lower_bound, 0, Lo);
- AddSInt(Subrange, DW_AT_upper_bound, 0, Hi);
- }
-
- Buffer.AddChild(Subrange);
- }
- break;
- }
- case DW_TAG_structure_type:
- case DW_TAG_union_type: {
- // Add elements to structure type.
- for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
- DebugInfoDesc *Element = Elements[i];
-
- if (DerivedTypeDesc *MemberDesc = dyn_cast<DerivedTypeDesc>(Element)){
- // Add field or base class.
-
- unsigned Tag = MemberDesc->getTag();
-
- // Extract the basic information.
- const std::string &Name = MemberDesc->getName();
- uint64_t Size = MemberDesc->getSize();
- uint64_t Align = MemberDesc->getAlign();
- uint64_t Offset = MemberDesc->getOffset();
-
- // Construct member debug information entry.
- DIE *Member = new DIE(Tag);
-
- // Add name if not "".
- if (!Name.empty())
- AddString(Member, DW_AT_name, DW_FORM_string, Name);
- // Add location if available.
- AddSourceLine(Member, MemberDesc->getFile(), MemberDesc->getLine());
-
- // Most of the time the field info is the same as the members.
- uint64_t FieldSize = Size;
- uint64_t FieldAlign = Align;
- uint64_t FieldOffset = Offset;
-
- // Set the member type.
- TypeDesc *FromTy = MemberDesc->getFromType();
- AddType(Member, FromTy, Unit);
-
- // Walk up typedefs until a real size is found.
- while (FromTy) {
- if (FromTy->getTag() != DW_TAG_typedef) {
- FieldSize = FromTy->getSize();
- FieldAlign = FromTy->getSize();
- break;
- }
-
- FromTy = cast<DerivedTypeDesc>(FromTy)->getFromType();
- }
-
- // Unless we have a bit field.
- if (Tag == DW_TAG_member && FieldSize != Size) {
- // Construct the alignment mask.
- uint64_t AlignMask = ~(FieldAlign - 1);
- // Determine the high bit + 1 of the declared size.
- uint64_t HiMark = (Offset + FieldSize) & AlignMask;
- // Work backwards to determine the base offset of the field.
- FieldOffset = HiMark - FieldSize;
- // Now normalize offset to the field.
- Offset -= FieldOffset;
-
- // Maybe we need to work from the other end.
- if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
-
- // Add size and offset.
- AddUInt(Member, DW_AT_byte_size, 0, FieldSize >> 3);
- AddUInt(Member, DW_AT_bit_size, 0, Size);
- AddUInt(Member, DW_AT_bit_offset, 0, Offset);
- }
-
- // Add computation for offset.
- DIEBlock *Block = new DIEBlock();
- AddUInt(Block, 0, DW_FORM_data1, DW_OP_plus_uconst);
- AddUInt(Block, 0, DW_FORM_udata, FieldOffset >> 3);
- AddBlock(Member, DW_AT_data_member_location, 0, Block);
-
- // Add accessibility (public default unless is base class.
- if (MemberDesc->isProtected()) {
- AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_protected);
- } else if (MemberDesc->isPrivate()) {
- AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_private);
- } else if (Tag == DW_TAG_inheritance) {
- AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_public);
- }
-
- Buffer.AddChild(Member);
- } else if (GlobalVariableDesc *StaticDesc =
- dyn_cast<GlobalVariableDesc>(Element)) {
- // Add static member.
-
- // Construct member debug information entry.
- DIE *Static = new DIE(DW_TAG_variable);
-
- // Add name and mangled name.
- const std::string &Name = StaticDesc->getName();
- const std::string &LinkageName = StaticDesc->getLinkageName();
- AddString(Static, DW_AT_name, DW_FORM_string, Name);
- if (!LinkageName.empty()) {
- AddString(Static, DW_AT_MIPS_linkage_name, DW_FORM_string,
- LinkageName);
- }
-
- // Add location.
- AddSourceLine(Static, StaticDesc->getFile(), StaticDesc->getLine());
-
- // Add type.
- if (TypeDesc *StaticTy = StaticDesc->getType())
- AddType(Static, StaticTy, Unit);
-
- // Add flags.
- if (!StaticDesc->isStatic())
- AddUInt(Static, DW_AT_external, DW_FORM_flag, 1);
- AddUInt(Static, DW_AT_declaration, DW_FORM_flag, 1);
-
- Buffer.AddChild(Static);
- } else if (SubprogramDesc *MethodDesc =
- dyn_cast<SubprogramDesc>(Element)) {
- // Add member function.
-
- // Construct member debug information entry.
- DIE *Method = new DIE(DW_TAG_subprogram);
-
- // Add name and mangled name.
- const std::string &Name = MethodDesc->getName();
- const std::string &LinkageName = MethodDesc->getLinkageName();
-
- AddString(Method, DW_AT_name, DW_FORM_string, Name);
- bool IsCTor = TyDesc->getName() == Name;
-
- if (!LinkageName.empty()) {
- AddString(Method, DW_AT_MIPS_linkage_name, DW_FORM_string,
- LinkageName);
- }
-
- // Add location.
- AddSourceLine(Method, MethodDesc->getFile(), MethodDesc->getLine());
-
- // Add type.
- if (CompositeTypeDesc *MethodTy =
- dyn_cast_or_null<CompositeTypeDesc>(MethodDesc->getType())) {
- // Get argument information.
- std::vector<DebugInfoDesc *> &Args = MethodTy->getElements();
-
- // If not a ctor.
- if (!IsCTor) {
- // Add return type.
- AddType(Method, dyn_cast<TypeDesc>(Args[0]), Unit);
- }
-
- // Add arguments.
- for(unsigned i = 1, N = Args.size(); i < N; ++i) {
- DIE *Arg = new DIE(DW_TAG_formal_parameter);
- AddType(Arg, cast<TypeDesc>(Args[i]), Unit);
- AddUInt(Arg, DW_AT_artificial, DW_FORM_flag, 1);
- Method->AddChild(Arg);
- }
- }
-
- // Add flags.
- if (!MethodDesc->isStatic())
- AddUInt(Method, DW_AT_external, DW_FORM_flag, 1);
- AddUInt(Method, DW_AT_declaration, DW_FORM_flag, 1);
-
- Buffer.AddChild(Method);
- }
- }
- break;
- }
- case DW_TAG_enumeration_type: {
- // Add enumerators to enumeration type.
- for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
- EnumeratorDesc *ED = cast<EnumeratorDesc>(Elements[i]);
- const std::string &Name = ED->getName();
- int64_t Value = ED->getValue();
- DIE *Enumerator = new DIE(DW_TAG_enumerator);
- AddString(Enumerator, DW_AT_name, DW_FORM_string, Name);
- AddSInt(Enumerator, DW_AT_const_value, DW_FORM_sdata, Value);
- Buffer.AddChild(Enumerator);
- }
-
- break;
- }
- case DW_TAG_subroutine_type: {
- // Add prototype flag.
- AddUInt(&Buffer, DW_AT_prototyped, DW_FORM_flag, 1);
- // Add return type.
- AddType(&Buffer, dyn_cast<TypeDesc>(Elements[0]), Unit);
-
- // Add arguments.
- for(unsigned i = 1, N = Elements.size(); i < N; ++i) {
- DIE *Arg = new DIE(DW_TAG_formal_parameter);
- AddType(Arg, cast<TypeDesc>(Elements[i]), Unit);
- Buffer.AddChild(Arg);
- }
-
- break;
- }
- default: break;
- }
- }
-
- // Add size if non-zero (derived types don't have a size.)
- if (Size) AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
- // Add name if not anonymous or intermediate type.
- if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
- // Add source line info if available.
- AddSourceLine(&Buffer, TyDesc->getFile(), TyDesc->getLine());
- }
-
- /// NewCompileUnit - Create new compile unit and it's debug information entry.
- ///
- CompileUnit *NewCompileUnit(CompileUnitDesc *UnitDesc, unsigned ID) {
- // Construct debug information entry.
- DIE *Die = new DIE(DW_TAG_compile_unit);
- AddSectionOffset(Die, DW_AT_stmt_list, DW_FORM_data4,
- DWLabel("section_line", 0), DWLabel("section_line", 0), false);
- AddString(Die, DW_AT_producer, DW_FORM_string, UnitDesc->getProducer());
- AddUInt (Die, DW_AT_language, DW_FORM_data1, UnitDesc->getLanguage());
- AddString(Die, DW_AT_name, DW_FORM_string, UnitDesc->getFileName());
- AddString(Die, DW_AT_comp_dir, DW_FORM_string, UnitDesc->getDirectory());
-
- // Construct compile unit.
- CompileUnit *Unit = new CompileUnit(UnitDesc, ID, Die);
-
- // Add Unit to compile unit map.
- DescToUnitMap[UnitDesc] = Unit;
-
- return Unit;
- }
-
- /// GetBaseCompileUnit - Get the main compile unit.
- ///
- CompileUnit *GetBaseCompileUnit() const {
- CompileUnit *Unit = CompileUnits[0];
- assert(Unit && "Missing compile unit.");
- return Unit;
- }
-
- /// FindCompileUnit - Get the compile unit for the given descriptor.
- ///
- CompileUnit *FindCompileUnit(CompileUnitDesc *UnitDesc) {
- CompileUnit *Unit = DescToUnitMap[UnitDesc];
- assert(Unit && "Missing compile unit.");
- return Unit;
- }
-
- /// NewGlobalVariable - Add a new global variable DIE.
- ///
- DIE *NewGlobalVariable(GlobalVariableDesc *GVD) {
- // Get the compile unit context.
- CompileUnitDesc *UnitDesc =
- static_cast<CompileUnitDesc *>(GVD->getContext());
- CompileUnit *Unit = GetBaseCompileUnit();
-
- // Check for pre-existence.
- DIE *&Slot = Unit->getDieMapSlotFor(GVD);
- if (Slot) return Slot;
-
- // Get the global variable itself.
- GlobalVariable *GV = GVD->getGlobalVariable();
-
- const std::string &Name = GVD->getName();
- const std::string &FullName = GVD->getFullName();
- const std::string &LinkageName = GVD->getLinkageName();
- // Create the global's variable DIE.
- DIE *VariableDie = new DIE(DW_TAG_variable);
- AddString(VariableDie, DW_AT_name, DW_FORM_string, Name);
- if (!LinkageName.empty()) {
- AddString(VariableDie, DW_AT_MIPS_linkage_name, DW_FORM_string,
- LinkageName);
- }
- AddType(VariableDie, GVD->getType(), Unit);
- if (!GVD->isStatic())
- AddUInt(VariableDie, DW_AT_external, DW_FORM_flag, 1);
-
- // Add source line info if available.
- AddSourceLine(VariableDie, UnitDesc, GVD->getLine());
-
- // Add address.
- DIEBlock *Block = new DIEBlock();
- AddUInt(Block, 0, DW_FORM_data1, DW_OP_addr);
- AddObjectLabel(Block, 0, DW_FORM_udata, Asm->getGlobalLinkName(GV));
- AddBlock(VariableDie, DW_AT_location, 0, Block);
-
- // Add to map.
- Slot = VariableDie;
-
- // Add to context owner.
- Unit->getDie()->AddChild(VariableDie);
-
- // Expose as global.
- // FIXME - need to check external flag.
- Unit->AddGlobal(FullName, VariableDie);
-
- return VariableDie;
- }
-
- /// NewSubprogram - Add a new subprogram DIE.
- ///
- DIE *NewSubprogram(SubprogramDesc *SPD) {
- // Get the compile unit context.
- CompileUnitDesc *UnitDesc =
- static_cast<CompileUnitDesc *>(SPD->getContext());
- CompileUnit *Unit = GetBaseCompileUnit();
-
- // Check for pre-existence.
- DIE *&Slot = Unit->getDieMapSlotFor(SPD);
- if (Slot) return Slot;
-
- // Gather the details (simplify add attribute code.)
- const std::string &Name = SPD->getName();
- const std::string &FullName = SPD->getFullName();
- const std::string &LinkageName = SPD->getLinkageName();
-
- DIE *SubprogramDie = new DIE(DW_TAG_subprogram);
- AddString(SubprogramDie, DW_AT_name, DW_FORM_string, Name);
- if (!LinkageName.empty()) {
- AddString(SubprogramDie, DW_AT_MIPS_linkage_name, DW_FORM_string,
- LinkageName);
- }
- if (SPD->getType()) AddType(SubprogramDie, SPD->getType(), Unit);
- if (!SPD->isStatic())
- AddUInt(SubprogramDie, DW_AT_external, DW_FORM_flag, 1);
- AddUInt(SubprogramDie, DW_AT_prototyped, DW_FORM_flag, 1);
-
- // Add source line info if available.
- AddSourceLine(SubprogramDie, UnitDesc, SPD->getLine());
-
- // Add to map.
- Slot = SubprogramDie;
-
- // Add to context owner.
- Unit->getDie()->AddChild(SubprogramDie);
-
- // Expose as global.
- Unit->AddGlobal(FullName, SubprogramDie);
-
- return SubprogramDie;
- }
-
- /// NewScopeVariable - Create a new scope variable.
- ///
- DIE *NewScopeVariable(DebugVariable *DV, CompileUnit *Unit) {
- // Get the descriptor.
- VariableDesc *VD = DV->getDesc();
-
- // Translate tag to proper Dwarf tag. The result variable is dropped for
- // now.
- unsigned Tag;
- switch (VD->getTag()) {
- case DW_TAG_return_variable: return NULL;
- case DW_TAG_arg_variable: Tag = DW_TAG_formal_parameter; break;
- case DW_TAG_auto_variable: // fall thru
- default: Tag = DW_TAG_variable; break;
- }
-
- // Define variable debug information entry.
- DIE *VariableDie = new DIE(Tag);
- AddString(VariableDie, DW_AT_name, DW_FORM_string, VD->getName());
-
- // Add source line info if available.
- AddSourceLine(VariableDie, VD->getFile(), VD->getLine());
-
- // Add variable type.
- AddType(VariableDie, VD->getType(), Unit);
-
- // Add variable address.
- MachineLocation Location;
- Location.set(RI->getFrameRegister(*MF),
- RI->getFrameIndexOffset(*MF, DV->getFrameIndex()));
- AddAddress(VariableDie, DW_AT_location, Location);
-
- return VariableDie;
- }
-
- /// ConstructScope - Construct the components of a scope.
- ///
- void ConstructScope(DebugScope *ParentScope,
- unsigned ParentStartID, unsigned ParentEndID,
- DIE *ParentDie, CompileUnit *Unit) {
- // Add variables to scope.
- std::vector<DebugVariable *> &Variables = ParentScope->getVariables();
- for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
- DIE *VariableDie = NewScopeVariable(Variables[i], Unit);
- if (VariableDie) ParentDie->AddChild(VariableDie);
- }
-
- // Add nested scopes.
- std::vector<DebugScope *> &Scopes = ParentScope->getScopes();
- for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
- // Define the Scope debug information entry.
- DebugScope *Scope = Scopes[j];
- // FIXME - Ignore inlined functions for the time being.
- if (!Scope->getParent()) continue;
-
- unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
- unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
-
- // Ignore empty scopes.
- if (StartID == EndID && StartID != 0) continue;
- if (Scope->getScopes().empty() && Scope->getVariables().empty()) continue;
-
- if (StartID == ParentStartID && EndID == ParentEndID) {
- // Just add stuff to the parent scope.
- ConstructScope(Scope, ParentStartID, ParentEndID, ParentDie, Unit);
- } else {
- DIE *ScopeDie = new DIE(DW_TAG_lexical_block);
-
- // Add the scope bounds.
- if (StartID) {
- AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
- DWLabel("label", StartID));
- } else {
- AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
- DWLabel("func_begin", SubprogramCount));
- }
- if (EndID) {
- AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
- DWLabel("label", EndID));
- } else {
- AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
- DWLabel("func_end", SubprogramCount));
- }
-
- // Add the scope contents.
- ConstructScope(Scope, StartID, EndID, ScopeDie, Unit);
- ParentDie->AddChild(ScopeDie);
- }
- }
- }
-
- /// ConstructRootScope - Construct the scope for the subprogram.
- ///
- void ConstructRootScope(DebugScope *RootScope) {
- // Exit if there is no root scope.
- if (!RootScope) return;
-
- // Get the subprogram debug information entry.
- SubprogramDesc *SPD = cast<SubprogramDesc>(RootScope->getDesc());
-
- // Get the compile unit context.
- CompileUnit *Unit = GetBaseCompileUnit();
-
- // Get the subprogram die.
- DIE *SPDie = Unit->getDieMapSlotFor(SPD);
- assert(SPDie && "Missing subprogram descriptor");
-
- // Add the function bounds.
- AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr,
- DWLabel("func_begin", SubprogramCount));
- AddLabel(SPDie, DW_AT_high_pc, DW_FORM_addr,
- DWLabel("func_end", SubprogramCount));
- MachineLocation Location(RI->getFrameRegister(*MF));
- AddAddress(SPDie, DW_AT_frame_base, Location);
-
- ConstructScope(RootScope, 0, 0, SPDie, Unit);
- }
-
- /// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
- /// tools to recognize the object file contains Dwarf information.
- void EmitInitial() {
- // Check to see if we already emitted intial headers.
- if (didInitial) return;
- didInitial = true;
-
- // Dwarf sections base addresses.
- if (TAI->doesDwarfRequireFrameSection()) {
- Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
- EmitLabel("section_debug_frame", 0);
- }
- Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
- EmitLabel("section_info", 0);
- Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
- EmitLabel("section_abbrev", 0);
- Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
- EmitLabel("section_aranges", 0);
- Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
- EmitLabel("section_macinfo", 0);
- Asm->SwitchToDataSection(TAI->getDwarfLineSection());
- EmitLabel("section_line", 0);
- Asm->SwitchToDataSection(TAI->getDwarfLocSection());
- EmitLabel("section_loc", 0);
- Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
- EmitLabel("section_pubnames", 0);
- Asm->SwitchToDataSection(TAI->getDwarfStrSection());
- EmitLabel("section_str", 0);
- Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
- EmitLabel("section_ranges", 0);
-
- Asm->SwitchToTextSection(TAI->getTextSection());
- EmitLabel("text_begin", 0);
- Asm->SwitchToDataSection(TAI->getDataSection());
- EmitLabel("data_begin", 0);
- }
-
- /// EmitDIE - Recusively Emits a debug information entry.
- ///
- void EmitDIE(DIE *Die) {
- // Get the abbreviation for this DIE.
- unsigned AbbrevNumber = Die->getAbbrevNumber();
- const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
-
- Asm->EOL();
-
- // Emit the code (index) for the abbreviation.
- Asm->EmitULEB128Bytes(AbbrevNumber);
-
- if (VerboseAsm)
- Asm->EOL(std::string("Abbrev [" +
- utostr(AbbrevNumber) +
- "] 0x" + utohexstr(Die->getOffset()) +
- ":0x" + utohexstr(Die->getSize()) + " " +
- TagString(Abbrev->getTag())));
- else
- Asm->EOL();
-
- SmallVector<DIEValue*, 32> &Values = Die->getValues();
- const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
-
- // Emit the DIE attribute values.
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- unsigned Attr = AbbrevData[i].getAttribute();
- unsigned Form = AbbrevData[i].getForm();
- assert(Form && "Too many attributes for DIE (check abbreviation)");
-
- switch (Attr) {
- case DW_AT_sibling: {
- Asm->EmitInt32(Die->SiblingOffset());
- break;
- }
- default: {
- // Emit an attribute using the defined form.
- Values[i]->EmitValue(*this, Form);
- break;
- }
- }
-
- Asm->EOL(AttributeString(Attr));
- }
-
- // Emit the DIE children if any.
- if (Abbrev->getChildrenFlag() == DW_CHILDREN_yes) {
- const std::vector<DIE *> &Children = Die->getChildren();
-
- for (unsigned j = 0, M = Children.size(); j < M; ++j) {
- EmitDIE(Children[j]);
- }
-
- Asm->EmitInt8(0); Asm->EOL("End Of Children Mark");
- }
- }
-
- /// SizeAndOffsetDie - Compute the size and offset of a DIE.
- ///
- unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last) {
- // Get the children.
- const std::vector<DIE *> &Children = Die->getChildren();
-
- // If not last sibling and has children then add sibling offset attribute.
- if (!Last && !Children.empty()) Die->AddSiblingOffset();
-
- // Record the abbreviation.
- AssignAbbrevNumber(Die->getAbbrev());
-
- // Get the abbreviation for this DIE.
- unsigned AbbrevNumber = Die->getAbbrevNumber();
- const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
-
- // Set DIE offset
- Die->setOffset(Offset);
-
- // Start the size with the size of abbreviation code.
- Offset += TargetAsmInfo::getULEB128Size(AbbrevNumber);
-
- const SmallVector<DIEValue*, 32> &Values = Die->getValues();
- const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
-
- // Size the DIE attribute values.
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- // Size attribute value.
- Offset += Values[i]->SizeOf(*this, AbbrevData[i].getForm());
- }
-
- // Size the DIE children if any.
- if (!Children.empty()) {
- assert(Abbrev->getChildrenFlag() == DW_CHILDREN_yes &&
- "Children flag not set");
-
- for (unsigned j = 0, M = Children.size(); j < M; ++j) {
- Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
- }
-
- // End of children marker.
- Offset += sizeof(int8_t);
- }
-
- Die->setSize(Offset - Die->getOffset());
- return Offset;
- }
-
- /// SizeAndOffsets - Compute the size and offset of all the DIEs.
- ///
- void SizeAndOffsets() {
- // Process base compile unit.
- CompileUnit *Unit = GetBaseCompileUnit();
- // Compute size of compile unit header
- unsigned Offset = sizeof(int32_t) + // Length of Compilation Unit Info
- sizeof(int16_t) + // DWARF version number
- sizeof(int32_t) + // Offset Into Abbrev. Section
- sizeof(int8_t); // Pointer Size (in bytes)
- SizeAndOffsetDie(Unit->getDie(), Offset, true);
- }
-
- /// EmitDebugInfo - Emit the debug info section.
- ///
- void EmitDebugInfo() {
- // Start debug info section.
- Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
-
- CompileUnit *Unit = GetBaseCompileUnit();
- DIE *Die = Unit->getDie();
- // Emit the compile units header.
- EmitLabel("info_begin", Unit->getID());
- // Emit size of content not including length itself
- unsigned ContentSize = Die->getSize() +
- sizeof(int16_t) + // DWARF version number
- sizeof(int32_t) + // Offset Into Abbrev. Section
- sizeof(int8_t) + // Pointer Size (in bytes)
- sizeof(int32_t); // FIXME - extra pad for gdb bug.
-
- Asm->EmitInt32(ContentSize); Asm->EOL("Length of Compilation Unit Info");
- Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
- EmitSectionOffset("abbrev_begin", "section_abbrev", 0, 0, true, false);
- Asm->EOL("Offset Into Abbrev. Section");
- Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Address Size (in bytes)");
-
- EmitDIE(Die);
- // FIXME - extra padding for gdb bug.
- Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
- Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
- Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
- Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
- EmitLabel("info_end", Unit->getID());
-
- Asm->EOL();
- }
-
- /// EmitAbbreviations - Emit the abbreviation section.
- ///
- void EmitAbbreviations() const {
- // Check to see if it is worth the effort.
- if (!Abbreviations.empty()) {
- // Start the debug abbrev section.
- Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
-
- EmitLabel("abbrev_begin", 0);
-
- // For each abbrevation.
- for (unsigned i = 0, N = Abbreviations.size(); i < N; ++i) {
- // Get abbreviation data
- const DIEAbbrev *Abbrev = Abbreviations[i];
-
- // Emit the abbrevations code (base 1 index.)
- Asm->EmitULEB128Bytes(Abbrev->getNumber());
- Asm->EOL("Abbreviation Code");
-
- // Emit the abbreviations data.
- Abbrev->Emit(*this);
-
- Asm->EOL();
- }
-
- // Mark end of abbreviations.
- Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(3)");
-
- EmitLabel("abbrev_end", 0);
-
- Asm->EOL();
- }
- }
-
- /// EmitEndOfLineMatrix - Emit the last address of the section and the end of
- /// the line matrix.
- ///
- void EmitEndOfLineMatrix(unsigned SectionEnd) {
- // Define last address of section.
- Asm->EmitInt8(0); Asm->EOL("Extended Op");
- Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
- Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
- EmitReference("section_end", SectionEnd); Asm->EOL("Section end label");
-
- // Mark end of matrix.
- Asm->EmitInt8(0); Asm->EOL("DW_LNE_end_sequence");
- Asm->EmitULEB128Bytes(1); Asm->EOL();
- Asm->EmitInt8(1); Asm->EOL();
- }
-
- /// EmitDebugLines - Emit source line information.
- ///
- void EmitDebugLines() {
- // If the target is using .loc/.file, the assembler will be emitting the
- // .debug_line table automatically.
- if (TAI->hasDotLocAndDotFile())
- return;
-
- // Minimum line delta, thus ranging from -10..(255-10).
- const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1);
- // Maximum line delta, thus ranging from -10..(255-10).
- const int MaxLineDelta = 255 + MinLineDelta;
-
- // Start the dwarf line section.
- Asm->SwitchToDataSection(TAI->getDwarfLineSection());
-
- // Construct the section header.
-
- EmitDifference("line_end", 0, "line_begin", 0, true);
- Asm->EOL("Length of Source Line Info");
- EmitLabel("line_begin", 0);
-
- Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
-
- EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0, true);
- Asm->EOL("Prolog Length");
- EmitLabel("line_prolog_begin", 0);
-
- Asm->EmitInt8(1); Asm->EOL("Minimum Instruction Length");
-
- Asm->EmitInt8(1); Asm->EOL("Default is_stmt_start flag");
-
- Asm->EmitInt8(MinLineDelta); Asm->EOL("Line Base Value (Special Opcodes)");
-
- Asm->EmitInt8(MaxLineDelta); Asm->EOL("Line Range Value (Special Opcodes)");
-
- Asm->EmitInt8(-MinLineDelta); Asm->EOL("Special Opcode Base");
-
- // Line number standard opcode encodings argument count
- Asm->EmitInt8(0); Asm->EOL("DW_LNS_copy arg count");
- Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_pc arg count");
- Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_line arg count");
- Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_file arg count");
- Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_column arg count");
- Asm->EmitInt8(0); Asm->EOL("DW_LNS_negate_stmt arg count");
- Asm->EmitInt8(0); Asm->EOL("DW_LNS_set_basic_block arg count");
- Asm->EmitInt8(0); Asm->EOL("DW_LNS_const_add_pc arg count");
- Asm->EmitInt8(1); Asm->EOL("DW_LNS_fixed_advance_pc arg count");
-
- const UniqueVector<std::string> &Directories = MMI->getDirectories();
- const UniqueVector<SourceFileInfo> &SourceFiles = MMI->getSourceFiles();
-
- // Emit directories.
- for (unsigned DirectoryID = 1, NDID = Directories.size();
- DirectoryID <= NDID; ++DirectoryID) {
- Asm->EmitString(Directories[DirectoryID]); Asm->EOL("Directory");
- }
- Asm->EmitInt8(0); Asm->EOL("End of directories");
-
- // Emit files.
- for (unsigned SourceID = 1, NSID = SourceFiles.size();
- SourceID <= NSID; ++SourceID) {
- const SourceFileInfo &SourceFile = SourceFiles[SourceID];
- Asm->EmitString(SourceFile.getName());
- Asm->EOL("Source");
- Asm->EmitULEB128Bytes(SourceFile.getDirectoryID());
- Asm->EOL("Directory #");
- Asm->EmitULEB128Bytes(0);
- Asm->EOL("Mod date");
- Asm->EmitULEB128Bytes(0);
- Asm->EOL("File size");
- }
- Asm->EmitInt8(0); Asm->EOL("End of files");
-
- EmitLabel("line_prolog_end", 0);
-
- // A sequence for each text section.
- unsigned SecSrcLinesSize = SectionSourceLines.size();
-
- for (unsigned j = 0; j < SecSrcLinesSize; ++j) {
- // Isolate current sections line info.
- const std::vector<SourceLineInfo> &LineInfos = SectionSourceLines[j];
-
- if (VerboseAsm)
- Asm->EOL(std::string("Section ") + SectionMap[j + 1]);
- else
- Asm->EOL();
-
- // Dwarf assumes we start with first line of first source file.
- unsigned Source = 1;
- unsigned Line = 1;
-
- // Construct rows of the address, source, line, column matrix.
- for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
- const SourceLineInfo &LineInfo = LineInfos[i];
- unsigned LabelID = MMI->MappedLabel(LineInfo.getLabelID());
- if (!LabelID) continue;
-
- unsigned SourceID = LineInfo.getSourceID();
- const SourceFileInfo &SourceFile = SourceFiles[SourceID];
- unsigned DirectoryID = SourceFile.getDirectoryID();
- if (VerboseAsm)
- Asm->EOL(Directories[DirectoryID]
- + SourceFile.getName()
- + ":"
- + utostr_32(LineInfo.getLine()));
- else
- Asm->EOL();
-
- // Define the line address.
- Asm->EmitInt8(0); Asm->EOL("Extended Op");
- Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
- Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
- EmitReference("label", LabelID); Asm->EOL("Location label");
-
- // If change of source, then switch to the new source.
- if (Source != LineInfo.getSourceID()) {
- Source = LineInfo.getSourceID();
- Asm->EmitInt8(DW_LNS_set_file); Asm->EOL("DW_LNS_set_file");
- Asm->EmitULEB128Bytes(Source); Asm->EOL("New Source");
- }
-
- // If change of line.
- if (Line != LineInfo.getLine()) {
- // Determine offset.
- int Offset = LineInfo.getLine() - Line;
- int Delta = Offset - MinLineDelta;
-
- // Update line.
- Line = LineInfo.getLine();
-
- // If delta is small enough and in range...
- if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
- // ... then use fast opcode.
- Asm->EmitInt8(Delta - MinLineDelta); Asm->EOL("Line Delta");
- } else {
- // ... otherwise use long hand.
- Asm->EmitInt8(DW_LNS_advance_line); Asm->EOL("DW_LNS_advance_line");
- Asm->EmitSLEB128Bytes(Offset); Asm->EOL("Line Offset");
- Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
- }
- } else {
- // Copy the previous row (different address or source)
- Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
- }
- }
-
- EmitEndOfLineMatrix(j + 1);
- }
-
- if (SecSrcLinesSize == 0)
- // Because we're emitting a debug_line section, we still need a line
- // table. The linker and friends expect it to exist. If there's nothing to
- // put into it, emit an empty table.
- EmitEndOfLineMatrix(1);
-
- EmitLabel("line_end", 0);
-
- Asm->EOL();
- }
-
- /// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
- ///
- void EmitCommonDebugFrame() {
- if (!TAI->doesDwarfRequireFrameSection())
- return;
-
- int stackGrowth =
- Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
- TargetFrameInfo::StackGrowsUp ?
- TD->getPointerSize() : -TD->getPointerSize();
-
- // Start the dwarf frame section.
- Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
-
- EmitLabel("debug_frame_common", 0);
- EmitDifference("debug_frame_common_end", 0,
- "debug_frame_common_begin", 0, true);
- Asm->EOL("Length of Common Information Entry");
-
- EmitLabel("debug_frame_common_begin", 0);
- Asm->EmitInt32((int)DW_CIE_ID);
- Asm->EOL("CIE Identifier Tag");
- Asm->EmitInt8(DW_CIE_VERSION);
- Asm->EOL("CIE Version");
- Asm->EmitString("");
- Asm->EOL("CIE Augmentation");
- Asm->EmitULEB128Bytes(1);
- Asm->EOL("CIE Code Alignment Factor");
- Asm->EmitSLEB128Bytes(stackGrowth);
- Asm->EOL("CIE Data Alignment Factor");
- Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false));
- Asm->EOL("CIE RA Column");
-
- std::vector<MachineMove> Moves;
- RI->getInitialFrameState(Moves);
-
- EmitFrameMoves(NULL, 0, Moves, false);
-
- Asm->EmitAlignment(2, 0, 0, false);
- EmitLabel("debug_frame_common_end", 0);
-
- Asm->EOL();
- }
-
- /// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
- /// section.
- void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
- if (!TAI->doesDwarfRequireFrameSection())
- return;
-
- // Start the dwarf frame section.
- Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
-
- EmitDifference("debug_frame_end", DebugFrameInfo.Number,
- "debug_frame_begin", DebugFrameInfo.Number, true);
- Asm->EOL("Length of Frame Information Entry");
-
- EmitLabel("debug_frame_begin", DebugFrameInfo.Number);
-
- EmitSectionOffset("debug_frame_common", "section_debug_frame",
- 0, 0, true, false);
- Asm->EOL("FDE CIE offset");
-
- EmitReference("func_begin", DebugFrameInfo.Number);
- Asm->EOL("FDE initial location");
- EmitDifference("func_end", DebugFrameInfo.Number,
- "func_begin", DebugFrameInfo.Number);
- Asm->EOL("FDE address range");
-
- EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves, false);
-
- Asm->EmitAlignment(2, 0, 0, false);
- EmitLabel("debug_frame_end", DebugFrameInfo.Number);
-
- Asm->EOL();
- }
-
- /// EmitDebugPubNames - Emit visible names into a debug pubnames section.
- ///
- void EmitDebugPubNames() {
- // Start the dwarf pubnames section.
- Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
-
- CompileUnit *Unit = GetBaseCompileUnit();
-
- EmitDifference("pubnames_end", Unit->getID(),
- "pubnames_begin", Unit->getID(), true);
- Asm->EOL("Length of Public Names Info");
-
- EmitLabel("pubnames_begin", Unit->getID());
-
- Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF Version");
-
- EmitSectionOffset("info_begin", "section_info",
- Unit->getID(), 0, true, false);
- Asm->EOL("Offset of Compilation Unit Info");
-
- EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID(),true);
- Asm->EOL("Compilation Unit Length");
-
- std::map<std::string, DIE *> &Globals = Unit->getGlobals();
-
- for (std::map<std::string, DIE *>::iterator GI = Globals.begin(),
- GE = Globals.end();
- GI != GE; ++GI) {
- const std::string &Name = GI->first;
- DIE * Entity = GI->second;
-
- Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset");
- Asm->EmitString(Name); Asm->EOL("External Name");
- }
-
- Asm->EmitInt32(0); Asm->EOL("End Mark");
- EmitLabel("pubnames_end", Unit->getID());
-
- Asm->EOL();
- }
-
- /// EmitDebugStr - Emit visible names into a debug str section.
- ///
- void EmitDebugStr() {
- // Check to see if it is worth the effort.
- if (!StringPool.empty()) {
- // Start the dwarf str section.
- Asm->SwitchToDataSection(TAI->getDwarfStrSection());
-
- // For each of strings in the string pool.
- for (unsigned StringID = 1, N = StringPool.size();
- StringID <= N; ++StringID) {
- // Emit a label for reference from debug information entries.
- EmitLabel("string", StringID);
- // Emit the string itself.
- const std::string &String = StringPool[StringID];
- Asm->EmitString(String); Asm->EOL();
- }
-
- Asm->EOL();
- }
- }
-
- /// EmitDebugLoc - Emit visible names into a debug loc section.
- ///
- void EmitDebugLoc() {
- // Start the dwarf loc section.
- Asm->SwitchToDataSection(TAI->getDwarfLocSection());
-
- Asm->EOL();
- }
-
- /// EmitDebugARanges - Emit visible names into a debug aranges section.
- ///
- void EmitDebugARanges() {
- // Start the dwarf aranges section.
- Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
-
- // FIXME - Mock up
- #if 0
- CompileUnit *Unit = GetBaseCompileUnit();
-
- // Don't include size of length
- Asm->EmitInt32(0x1c); Asm->EOL("Length of Address Ranges Info");
-
- Asm->EmitInt16(DWARF_VERSION); Asm->EOL("Dwarf Version");
-
- EmitReference("info_begin", Unit->getID());
- Asm->EOL("Offset of Compilation Unit Info");
-
- Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Size of Address");
-
- Asm->EmitInt8(0); Asm->EOL("Size of Segment Descriptor");
-
- Asm->EmitInt16(0); Asm->EOL("Pad (1)");
- Asm->EmitInt16(0); Asm->EOL("Pad (2)");
-
- // Range 1
- EmitReference("text_begin", 0); Asm->EOL("Address");
- EmitDifference("text_end", 0, "text_begin", 0, true); Asm->EOL("Length");
-
- Asm->EmitInt32(0); Asm->EOL("EOM (1)");
- Asm->EmitInt32(0); Asm->EOL("EOM (2)");
- #endif
-
- Asm->EOL();
- }
-
- /// EmitDebugRanges - Emit visible names into a debug ranges section.
- ///
- void EmitDebugRanges() {
- // Start the dwarf ranges section.
- Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
-
- Asm->EOL();
- }
-
- /// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
- ///
- void EmitDebugMacInfo() {
- // Start the dwarf macinfo section.
- Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
-
- Asm->EOL();
- }
-
- /// ConstructCompileUnitDIEs - Create a compile unit DIE for each source and
- /// header file.
- void ConstructCompileUnitDIEs() {
- const UniqueVector<CompileUnitDesc *> CUW = MMI->getCompileUnits();
-
- for (unsigned i = 1, N = CUW.size(); i <= N; ++i) {
- unsigned ID = MMI->RecordSource(CUW[i]);
- CompileUnit *Unit = NewCompileUnit(CUW[i], ID);
- CompileUnits.push_back(Unit);
- }
- }
-
- /// ConstructGlobalDIEs - Create DIEs for each of the externally visible
- /// global variables.
- void ConstructGlobalDIEs() {
- std::vector<GlobalVariableDesc *> GlobalVariables;
- MMI->getAnchoredDescriptors<GlobalVariableDesc>(*M, GlobalVariables);
-
- for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
- GlobalVariableDesc *GVD = GlobalVariables[i];
- NewGlobalVariable(GVD);
- }
- }
-
- /// ConstructSubprogramDIEs - Create DIEs for each of the externally visible
- /// subprograms.
- void ConstructSubprogramDIEs() {
- std::vector<SubprogramDesc *> Subprograms;
- MMI->getAnchoredDescriptors<SubprogramDesc>(*M, Subprograms);
-
- for (unsigned i = 0, N = Subprograms.size(); i < N; ++i) {
- SubprogramDesc *SPD = Subprograms[i];
- NewSubprogram(SPD);
- }
- }
-
-public:
- //===--------------------------------------------------------------------===//
- // Main entry points.
- //
- DwarfDebug(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
- : Dwarf(OS, A, T, "dbg")
- , CompileUnits()
- , AbbreviationsSet(InitAbbreviationsSetSize)
- , Abbreviations()
- , ValuesSet(InitValuesSetSize)
- , Values()
- , StringPool()
- , DescToUnitMap()
- , SectionMap()
- , SectionSourceLines()
- , didInitial(false)
- , shouldEmit(false)
- {
- }
- virtual ~DwarfDebug() {
- for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i)
- delete CompileUnits[i];
- for (unsigned j = 0, M = Values.size(); j < M; ++j)
- delete Values[j];
- }
-
- /// SetModuleInfo - Set machine module information when it's known that pass
- /// manager has created it. Set by the target AsmPrinter.
- void SetModuleInfo(MachineModuleInfo *mmi) {
- // Make sure initial declarations are made.
- if (!MMI && mmi->hasDebugInfo()) {
- MMI = mmi;
- shouldEmit = true;
-
- // Create all the compile unit DIEs.
- ConstructCompileUnitDIEs();
-
- // Create DIEs for each of the externally visible global variables.
- ConstructGlobalDIEs();
-
- // Create DIEs for each of the externally visible subprograms.
- ConstructSubprogramDIEs();
-
- // Prime section data.
- SectionMap.insert(TAI->getTextSection());
-
- // Print out .file directives to specify files for .loc directives. These
- // are printed out early so that they precede any .loc directives.
- if (TAI->hasDotLocAndDotFile()) {
- const UniqueVector<SourceFileInfo> &SourceFiles = MMI->getSourceFiles();
- const UniqueVector<std::string> &Directories = MMI->getDirectories();
- for (unsigned i = 1, e = SourceFiles.size(); i <= e; ++i) {
- sys::Path FullPath(Directories[SourceFiles[i].getDirectoryID()]);
- bool AppendOk = FullPath.appendComponent(SourceFiles[i].getName());
- assert(AppendOk && "Could not append filename to directory!");
- Asm->EmitFile(i, FullPath.toString());
- Asm->EOL();
- }
- }
-
- // Emit initial sections
- EmitInitial();
- }
- }
-
- /// BeginModule - Emit all Dwarf sections that should come prior to the
- /// content.
- void BeginModule(Module *M) {
- this->M = M;
- }
-
- /// EndModule - Emit all Dwarf sections that should come after the content.
- ///
- void EndModule() {
- if (!ShouldEmitDwarf()) return;
-
- // Standard sections final addresses.
- Asm->SwitchToTextSection(TAI->getTextSection());
- EmitLabel("text_end", 0);
- Asm->SwitchToDataSection(TAI->getDataSection());
- EmitLabel("data_end", 0);
-
- // End text sections.
- for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
- Asm->SwitchToTextSection(SectionMap[i].c_str());
- EmitLabel("section_end", i);
- }
-
- // Emit common frame information.
- EmitCommonDebugFrame();
-
- // Emit function debug frame information
- for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
- E = DebugFrames.end(); I != E; ++I)
- EmitFunctionDebugFrame(*I);
-
- // Compute DIE offsets and sizes.
- SizeAndOffsets();
-
- // Emit all the DIEs into a debug info section
- EmitDebugInfo();
-
- // Corresponding abbreviations into a abbrev section.
- EmitAbbreviations();
-
- // Emit source line correspondence into a debug line section.
- EmitDebugLines();
-
- // Emit info into a debug pubnames section.
- EmitDebugPubNames();
-
- // Emit info into a debug str section.
- EmitDebugStr();
-
- // Emit info into a debug loc section.
- EmitDebugLoc();
-
- // Emit info into a debug aranges section.
- EmitDebugARanges();
-
- // Emit info into a debug ranges section.
- EmitDebugRanges();
-
- // Emit info into a debug macinfo section.
- EmitDebugMacInfo();
- }
-
- /// BeginFunction - Gather pre-function debug information. Assumes being
- /// emitted immediately after the function entry point.
- void BeginFunction(MachineFunction *MF) {
- this->MF = MF;
-
- if (!ShouldEmitDwarf()) return;
-
- // Begin accumulating function debug information.
- MMI->BeginFunction(MF);
-
- // Assumes in correct section after the entry point.
- EmitLabel("func_begin", ++SubprogramCount);
-
- // Emit label for the implicitly defined dbg.stoppoint at the start of
- // the function.
- const std::vector<SourceLineInfo> &LineInfos = MMI->getSourceLines();
- if (!LineInfos.empty()) {
- const SourceLineInfo &LineInfo = LineInfos[0];
- Asm->printLabel(LineInfo.getLabelID());
- }
- }
-
- /// EndFunction - Gather and emit post-function debug information.
- ///
- void EndFunction() {
- if (!ShouldEmitDwarf()) return;
-
- // Define end label for subprogram.
- EmitLabel("func_end", SubprogramCount);
-
- // Get function line info.
- const std::vector<SourceLineInfo> &LineInfos = MMI->getSourceLines();
-
- if (!LineInfos.empty()) {
- // Get section line info.
- unsigned ID = SectionMap.insert(Asm->CurrentSection);
- if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID);
- std::vector<SourceLineInfo> &SectionLineInfos = SectionSourceLines[ID-1];
- // Append the function info to section info.
- SectionLineInfos.insert(SectionLineInfos.end(),
- LineInfos.begin(), LineInfos.end());
- }
-
- // Construct scopes for subprogram.
- ConstructRootScope(MMI->getRootScope());
-
- DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount,
- MMI->getFrameMoves()));
- }
-};
-
-//===----------------------------------------------------------------------===//
-/// DwarfException - Emits Dwarf exception handling directives.
-///
-class DwarfException : public Dwarf {
-
-private:
- struct FunctionEHFrameInfo {
- std::string FnName;
- unsigned Number;
- unsigned PersonalityIndex;
- bool hasCalls;
- bool hasLandingPads;
- std::vector<MachineMove> Moves;
- const Function * function;
-
- FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P,
- bool hC, bool hL,
- const std::vector<MachineMove> &M,
- const Function *f):
- FnName(FN), Number(Num), PersonalityIndex(P),
- hasCalls(hC), hasLandingPads(hL), Moves(M), function (f) { }
- };
-
- std::vector<FunctionEHFrameInfo> EHFrames;
-
- /// shouldEmitTable - Per-function flag to indicate if EH tables should
- /// be emitted.
- bool shouldEmitTable;
-
- /// shouldEmitMoves - Per-function flag to indicate if frame moves info
- /// should be emitted.
- bool shouldEmitMoves;
-
- /// shouldEmitTableModule - Per-module flag to indicate if EH tables
- /// should be emitted.
- bool shouldEmitTableModule;
-
- /// shouldEmitFrameModule - Per-module flag to indicate if frame moves
- /// should be emitted.
- bool shouldEmitMovesModule;
-
- /// EmitCommonEHFrame - Emit the common eh unwind frame.
- ///
- void EmitCommonEHFrame(const Function *Personality, unsigned Index) {
- // Size and sign of stack growth.
- int stackGrowth =
- Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
- TargetFrameInfo::StackGrowsUp ?
- TD->getPointerSize() : -TD->getPointerSize();
-
- // Begin eh frame section.
- Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
- O << "EH_frame" << Index << ":\n";
- EmitLabel("section_eh_frame", Index);
-
- // Define base labels.
- EmitLabel("eh_frame_common", Index);
-
- // Define the eh frame length.
- EmitDifference("eh_frame_common_end", Index,
- "eh_frame_common_begin", Index, true);
- Asm->EOL("Length of Common Information Entry");
-
- // EH frame header.
- EmitLabel("eh_frame_common_begin", Index);
- Asm->EmitInt32((int)0);
- Asm->EOL("CIE Identifier Tag");
- Asm->EmitInt8(DW_CIE_VERSION);
- Asm->EOL("CIE Version");
-
- // The personality presence indicates that language specific information
- // will show up in the eh frame.
- Asm->EmitString(Personality ? "zPLR" : "zR");
- Asm->EOL("CIE Augmentation");
-
- // Round out reader.
- Asm->EmitULEB128Bytes(1);
- Asm->EOL("CIE Code Alignment Factor");
- Asm->EmitSLEB128Bytes(stackGrowth);
- Asm->EOL("CIE Data Alignment Factor");
- Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true));
- Asm->EOL("CIE Return Address Column");
-
- // If there is a personality, we need to indicate the functions location.
- if (Personality) {
- Asm->EmitULEB128Bytes(7);
- Asm->EOL("Augmentation Size");
-
- if (TAI->getNeedsIndirectEncoding()) {
- Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4 | DW_EH_PE_indirect);
- Asm->EOL("Personality (pcrel sdata4 indirect)");
- } else {
- Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
- Asm->EOL("Personality (pcrel sdata4)");
- }
-
- PrintRelDirective(true);
- O << TAI->getPersonalityPrefix();
- Asm->EmitExternalGlobal((const GlobalVariable *)(Personality));
- O << TAI->getPersonalitySuffix();
- if (strcmp(TAI->getPersonalitySuffix(), "+4 at GOTPCREL"))
- O << "-" << TAI->getPCSymbol();
- Asm->EOL("Personality");
-
- Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
- Asm->EOL("LSDA Encoding (pcrel sdata4)");
- Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
- Asm->EOL("FDE Encoding (pcrel sdata4)");
- } else {
- Asm->EmitULEB128Bytes(1);
- Asm->EOL("Augmentation Size");
- Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
- Asm->EOL("FDE Encoding (pcrel sdata4)");
- }
-
- // Indicate locations of general callee saved registers in frame.
- std::vector<MachineMove> Moves;
- RI->getInitialFrameState(Moves);
- EmitFrameMoves(NULL, 0, Moves, true);
-
- // On Darwin the linker honors the alignment of eh_frame, which means it
- // must be 8-byte on 64-bit targets to match what gcc does. Otherwise
- // you get holes which confuse readers of eh_frame.
- Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
- 0, 0, false);
- EmitLabel("eh_frame_common_end", Index);
-
- Asm->EOL();
- }
-
- /// EmitEHFrame - Emit function exception frame information.
- ///
- void EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
- Function::LinkageTypes linkage = EHFrameInfo.function->getLinkage();
-
- Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
-
- // Externally visible entry into the functions eh frame info.
- // If the corresponding function is static, this should not be
- // externally visible.
- if (linkage != Function::InternalLinkage) {
- if (const char *GlobalEHDirective = TAI->getGlobalEHDirective())
- O << GlobalEHDirective << EHFrameInfo.FnName << "\n";
- }
-
- // If corresponding function is weak definition, this should be too.
- if ((linkage == Function::WeakLinkage ||
- linkage == Function::LinkOnceLinkage) &&
- TAI->getWeakDefDirective())
- O << TAI->getWeakDefDirective() << EHFrameInfo.FnName << "\n";
-
- // If there are no calls then you can't unwind. This may mean we can
- // omit the EH Frame, but some environments do not handle weak absolute
- // symbols.
- // If UnwindTablesMandatory is set we cannot do this optimization; the
- // unwind info is to be available for non-EH uses.
- if (!EHFrameInfo.hasCalls &&
- !UnwindTablesMandatory &&
- ((linkage != Function::WeakLinkage &&
- linkage != Function::LinkOnceLinkage) ||
- !TAI->getWeakDefDirective() ||
- TAI->getSupportsWeakOmittedEHFrame()))
- {
- O << EHFrameInfo.FnName << " = 0\n";
- // This name has no connection to the function, so it might get
- // dead-stripped when the function is not, erroneously. Prohibit
- // dead-stripping unconditionally.
- if (const char *UsedDirective = TAI->getUsedDirective())
- O << UsedDirective << EHFrameInfo.FnName << "\n\n";
- } else {
- O << EHFrameInfo.FnName << ":\n";
-
- // EH frame header.
- EmitDifference("eh_frame_end", EHFrameInfo.Number,
- "eh_frame_begin", EHFrameInfo.Number, true);
- Asm->EOL("Length of Frame Information Entry");
-
- EmitLabel("eh_frame_begin", EHFrameInfo.Number);
-
- EmitSectionOffset("eh_frame_begin", "eh_frame_common",
- EHFrameInfo.Number, EHFrameInfo.PersonalityIndex,
- true, true, false);
- Asm->EOL("FDE CIE offset");
-
- EmitReference("eh_func_begin", EHFrameInfo.Number, true, true);
- Asm->EOL("FDE initial location");
- EmitDifference("eh_func_end", EHFrameInfo.Number,
- "eh_func_begin", EHFrameInfo.Number, true);
- Asm->EOL("FDE address range");
-
- // If there is a personality and landing pads then point to the language
- // specific data area in the exception table.
- if (EHFrameInfo.PersonalityIndex) {
- Asm->EmitULEB128Bytes(4);
- Asm->EOL("Augmentation size");
-
- if (EHFrameInfo.hasLandingPads)
- EmitReference("exception", EHFrameInfo.Number, true, true);
- else
- Asm->EmitInt32((int)0);
- Asm->EOL("Language Specific Data Area");
- } else {
- Asm->EmitULEB128Bytes(0);
- Asm->EOL("Augmentation size");
- }
-
- // Indicate locations of function specific callee saved registers in
- // frame.
- EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves, true);
-
- // On Darwin the linker honors the alignment of eh_frame, which means it
- // must be 8-byte on 64-bit targets to match what gcc does. Otherwise
- // you get holes which confuse readers of eh_frame.
- Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
- 0, 0, false);
- EmitLabel("eh_frame_end", EHFrameInfo.Number);
-
- // If the function is marked used, this table should be also. We cannot
- // make the mark unconditional in this case, since retaining the table
- // also retains the function in this case, and there is code around
- // that depends on unused functions (calling undefined externals) being
- // dead-stripped to link correctly. Yes, there really is.
- if (MMI->getUsedFunctions().count(EHFrameInfo.function))
- if (const char *UsedDirective = TAI->getUsedDirective())
- O << UsedDirective << EHFrameInfo.FnName << "\n\n";
- }
- }
-
- /// EmitExceptionTable - Emit landing pads and actions.
- ///
- /// The general organization of the table is complex, but the basic concepts
- /// are easy. First there is a header which describes the location and
- /// organization of the three components that follow.
- /// 1. The landing pad site information describes the range of code covered
- /// by the try. In our case it's an accumulation of the ranges covered
- /// by the invokes in the try. There is also a reference to the landing
- /// pad that handles the exception once processed. Finally an index into
- /// the actions table.
- /// 2. The action table, in our case, is composed of pairs of type ids
- /// and next action offset. Starting with the action index from the
- /// landing pad site, each type Id is checked for a match to the current
- /// exception. If it matches then the exception and type id are passed
- /// on to the landing pad. Otherwise the next action is looked up. This
- /// chain is terminated with a next action of zero. If no type id is
- /// found the the frame is unwound and handling continues.
- /// 3. Type id table contains references to all the C++ typeinfo for all
- /// catches in the function. This tables is reversed indexed base 1.
-
- /// SharedTypeIds - How many leading type ids two landing pads have in common.
- static unsigned SharedTypeIds(const LandingPadInfo *L,
- const LandingPadInfo *R) {
- const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
- unsigned LSize = LIds.size(), RSize = RIds.size();
- unsigned MinSize = LSize < RSize ? LSize : RSize;
- unsigned Count = 0;
-
- for (; Count != MinSize; ++Count)
- if (LIds[Count] != RIds[Count])
- return Count;
-
- return Count;
- }
-
- /// PadLT - Order landing pads lexicographically by type id.
- static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R) {
- const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
- unsigned LSize = LIds.size(), RSize = RIds.size();
- unsigned MinSize = LSize < RSize ? LSize : RSize;
-
- for (unsigned i = 0; i != MinSize; ++i)
- if (LIds[i] != RIds[i])
- return LIds[i] < RIds[i];
-
- return LSize < RSize;
- }
-
- struct KeyInfo {
- static inline unsigned getEmptyKey() { return -1U; }
- static inline unsigned getTombstoneKey() { return -2U; }
- static unsigned getHashValue(const unsigned &Key) { return Key; }
- static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; }
- static bool isPod() { return true; }
- };
-
- /// ActionEntry - Structure describing an entry in the actions table.
- struct ActionEntry {
- int ValueForTypeID; // The value to write - may not be equal to the type id.
- int NextAction;
- struct ActionEntry *Previous;
- };
-
- /// PadRange - Structure holding a try-range and the associated landing pad.
- struct PadRange {
- // The index of the landing pad.
- unsigned PadIndex;
- // The index of the begin and end labels in the landing pad's label lists.
- unsigned RangeIndex;
- };
-
- typedef DenseMap<unsigned, PadRange, KeyInfo> RangeMapType;
-
- /// CallSiteEntry - Structure describing an entry in the call-site table.
- struct CallSiteEntry {
- // The 'try-range' is BeginLabel .. EndLabel.
- unsigned BeginLabel; // zero indicates the start of the function.
- unsigned EndLabel; // zero indicates the end of the function.
- // The landing pad starts at PadLabel.
- unsigned PadLabel; // zero indicates that there is no landing pad.
- unsigned Action;
- };
-
- void EmitExceptionTable() {
- const std::vector<GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
- const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
- const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads();
- if (PadInfos.empty()) return;
-
- // Sort the landing pads in order of their type ids. This is used to fold
- // duplicate actions.
- SmallVector<const LandingPadInfo *, 64> LandingPads;
- LandingPads.reserve(PadInfos.size());
- for (unsigned i = 0, N = PadInfos.size(); i != N; ++i)
- LandingPads.push_back(&PadInfos[i]);
- std::sort(LandingPads.begin(), LandingPads.end(), PadLT);
-
- // Negative type ids index into FilterIds, positive type ids index into
- // TypeInfos. The value written for a positive type id is just the type
- // id itself. For a negative type id, however, the value written is the
- // (negative) byte offset of the corresponding FilterIds entry. The byte
- // offset is usually equal to the type id, because the FilterIds entries
- // are written using a variable width encoding which outputs one byte per
- // entry as long as the value written is not too large, but can differ.
- // This kind of complication does not occur for positive type ids because
- // type infos are output using a fixed width encoding.
- // FilterOffsets[i] holds the byte offset corresponding to FilterIds[i].
- SmallVector<int, 16> FilterOffsets;
- FilterOffsets.reserve(FilterIds.size());
- int Offset = -1;
- for(std::vector<unsigned>::const_iterator I = FilterIds.begin(),
- E = FilterIds.end(); I != E; ++I) {
- FilterOffsets.push_back(Offset);
- Offset -= TargetAsmInfo::getULEB128Size(*I);
- }
-
- // Compute the actions table and gather the first action index for each
- // landing pad site.
- SmallVector<ActionEntry, 32> Actions;
- SmallVector<unsigned, 64> FirstActions;
- FirstActions.reserve(LandingPads.size());
-
- int FirstAction = 0;
- unsigned SizeActions = 0;
- for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
- const LandingPadInfo *LP = LandingPads[i];
- const std::vector<int> &TypeIds = LP->TypeIds;
- const unsigned NumShared = i ? SharedTypeIds(LP, LandingPads[i-1]) : 0;
- unsigned SizeSiteActions = 0;
-
- if (NumShared < TypeIds.size()) {
- unsigned SizeAction = 0;
- ActionEntry *PrevAction = 0;
-
- if (NumShared) {
- const unsigned SizePrevIds = LandingPads[i-1]->TypeIds.size();
- assert(Actions.size());
- PrevAction = &Actions.back();
- SizeAction = TargetAsmInfo::getSLEB128Size(PrevAction->NextAction) +
- TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
- for (unsigned j = NumShared; j != SizePrevIds; ++j) {
- SizeAction -=
- TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
- SizeAction += -PrevAction->NextAction;
- PrevAction = PrevAction->Previous;
- }
- }
-
- // Compute the actions.
- for (unsigned I = NumShared, M = TypeIds.size(); I != M; ++I) {
- int TypeID = TypeIds[I];
- assert(-1-TypeID < (int)FilterOffsets.size() && "Unknown filter id!");
- int ValueForTypeID = TypeID < 0 ? FilterOffsets[-1 - TypeID] : TypeID;
- unsigned SizeTypeID = TargetAsmInfo::getSLEB128Size(ValueForTypeID);
-
- int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0;
- SizeAction = SizeTypeID + TargetAsmInfo::getSLEB128Size(NextAction);
- SizeSiteActions += SizeAction;
-
- ActionEntry Action = {ValueForTypeID, NextAction, PrevAction};
- Actions.push_back(Action);
-
- PrevAction = &Actions.back();
- }
-
- // Record the first action of the landing pad site.
- FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
- } // else identical - re-use previous FirstAction
-
- FirstActions.push_back(FirstAction);
-
- // Compute this sites contribution to size.
- SizeActions += SizeSiteActions;
- }
-
- // Compute the call-site table. The entry for an invoke has a try-range
- // containing the call, a non-zero landing pad and an appropriate action.
- // The entry for an ordinary call has a try-range containing the call and
- // zero for the landing pad and the action. Calls marked 'nounwind' have
- // no entry and must not be contained in the try-range of any entry - they
- // form gaps in the table. Entries must be ordered by try-range address.
- SmallVector<CallSiteEntry, 64> CallSites;
-
- RangeMapType PadMap;
- // Invokes and nounwind calls have entries in PadMap (due to being bracketed
- // by try-range labels when lowered). Ordinary calls do not, so appropriate
- // try-ranges for them need be deduced.
- for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
- const LandingPadInfo *LandingPad = LandingPads[i];
- for (unsigned j = 0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
- unsigned BeginLabel = LandingPad->BeginLabels[j];
- assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!");
- PadRange P = { i, j };
- PadMap[BeginLabel] = P;
- }
- }
-
- // The end label of the previous invoke or nounwind try-range.
- unsigned LastLabel = 0;
-
- // Whether there is a potentially throwing instruction (currently this means
- // an ordinary call) between the end of the previous try-range and now.
- bool SawPotentiallyThrowing = false;
-
- // Whether the last callsite entry was for an invoke.
- bool PreviousIsInvoke = false;
-
- // Visit all instructions in order of address.
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I) {
- for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
- MI != E; ++MI) {
- if (!MI->isLabel()) {
- SawPotentiallyThrowing |= MI->getDesc().isCall();
- continue;
- }
-
- unsigned BeginLabel = MI->getOperand(0).getImm();
- assert(BeginLabel && "Invalid label!");
-
- // End of the previous try-range?
- if (BeginLabel == LastLabel)
- SawPotentiallyThrowing = false;
-
- // Beginning of a new try-range?
- RangeMapType::iterator L = PadMap.find(BeginLabel);
- if (L == PadMap.end())
- // Nope, it was just some random label.
- continue;
-
- PadRange P = L->second;
- const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
-
- assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] &&
- "Inconsistent landing pad map!");
-
- // If some instruction between the previous try-range and this one may
- // throw, create a call-site entry with no landing pad for the region
- // between the try-ranges.
- if (SawPotentiallyThrowing) {
- CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0};
- CallSites.push_back(Site);
- PreviousIsInvoke = false;
- }
-
- LastLabel = LandingPad->EndLabels[P.RangeIndex];
- assert(BeginLabel && LastLabel && "Invalid landing pad!");
-
- if (LandingPad->LandingPadLabel) {
- // This try-range is for an invoke.
- CallSiteEntry Site = {BeginLabel, LastLabel,
- LandingPad->LandingPadLabel, FirstActions[P.PadIndex]};
-
- // Try to merge with the previous call-site.
- if (PreviousIsInvoke) {
- CallSiteEntry &Prev = CallSites.back();
- if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
- // Extend the range of the previous entry.
- Prev.EndLabel = Site.EndLabel;
- continue;
- }
- }
-
- // Otherwise, create a new call-site.
- CallSites.push_back(Site);
- PreviousIsInvoke = true;
- } else {
- // Create a gap.
- PreviousIsInvoke = false;
- }
- }
- }
- // If some instruction between the previous try-range and the end of the
- // function may throw, create a call-site entry with no landing pad for the
- // region following the try-range.
- if (SawPotentiallyThrowing) {
- CallSiteEntry Site = {LastLabel, 0, 0, 0};
- CallSites.push_back(Site);
- }
-
- // Final tallies.
-
- // Call sites.
- const unsigned SiteStartSize = sizeof(int32_t); // DW_EH_PE_udata4
- const unsigned SiteLengthSize = sizeof(int32_t); // DW_EH_PE_udata4
- const unsigned LandingPadSize = sizeof(int32_t); // DW_EH_PE_udata4
- unsigned SizeSites = CallSites.size() * (SiteStartSize +
- SiteLengthSize +
- LandingPadSize);
- for (unsigned i = 0, e = CallSites.size(); i < e; ++i)
- SizeSites += TargetAsmInfo::getULEB128Size(CallSites[i].Action);
-
- // Type infos.
- const unsigned TypeInfoSize = TD->getPointerSize(); // DW_EH_PE_absptr
- unsigned SizeTypes = TypeInfos.size() * TypeInfoSize;
-
- unsigned TypeOffset = sizeof(int8_t) + // Call site format
- TargetAsmInfo::getULEB128Size(SizeSites) + // Call-site table length
- SizeSites + SizeActions + SizeTypes;
-
- unsigned TotalSize = sizeof(int8_t) + // LPStart format
- sizeof(int8_t) + // TType format
- TargetAsmInfo::getULEB128Size(TypeOffset) + // TType base offset
- TypeOffset;
-
- unsigned SizeAlign = (4 - TotalSize) & 3;
-
- // Begin the exception table.
- Asm->SwitchToDataSection(TAI->getDwarfExceptionSection());
- O << "GCC_except_table" << SubprogramCount << ":\n";
- Asm->EmitAlignment(2, 0, 0, false);
- for (unsigned i = 0; i != SizeAlign; ++i) {
- Asm->EmitInt8(0);
- Asm->EOL("Padding");
- }
- EmitLabel("exception", SubprogramCount);
-
- // Emit the header.
- Asm->EmitInt8(DW_EH_PE_omit);
- Asm->EOL("LPStart format (DW_EH_PE_omit)");
- Asm->EmitInt8(DW_EH_PE_absptr);
- Asm->EOL("TType format (DW_EH_PE_absptr)");
- Asm->EmitULEB128Bytes(TypeOffset);
- Asm->EOL("TType base offset");
- Asm->EmitInt8(DW_EH_PE_udata4);
- Asm->EOL("Call site format (DW_EH_PE_udata4)");
- Asm->EmitULEB128Bytes(SizeSites);
- Asm->EOL("Call-site table length");
-
- // Emit the landing pad site information.
- for (unsigned i = 0; i < CallSites.size(); ++i) {
- CallSiteEntry &S = CallSites[i];
- const char *BeginTag;
- unsigned BeginNumber;
-
- if (!S.BeginLabel) {
- BeginTag = "eh_func_begin";
- BeginNumber = SubprogramCount;
- } else {
- BeginTag = "label";
- BeginNumber = S.BeginLabel;
- }
-
- EmitSectionOffset(BeginTag, "eh_func_begin", BeginNumber, SubprogramCount,
- true, true);
- Asm->EOL("Region start");
-
- if (!S.EndLabel) {
- EmitDifference("eh_func_end", SubprogramCount, BeginTag, BeginNumber,
- true);
- } else {
- EmitDifference("label", S.EndLabel, BeginTag, BeginNumber, true);
- }
- Asm->EOL("Region length");
-
- if (!S.PadLabel)
- Asm->EmitInt32(0);
- else
- EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount,
- true, true);
- Asm->EOL("Landing pad");
-
- Asm->EmitULEB128Bytes(S.Action);
- Asm->EOL("Action");
- }
-
- // Emit the actions.
- for (unsigned I = 0, N = Actions.size(); I != N; ++I) {
- ActionEntry &Action = Actions[I];
-
- Asm->EmitSLEB128Bytes(Action.ValueForTypeID);
- Asm->EOL("TypeInfo index");
- Asm->EmitSLEB128Bytes(Action.NextAction);
- Asm->EOL("Next action");
- }
-
- // Emit the type ids.
- for (unsigned M = TypeInfos.size(); M; --M) {
- GlobalVariable *GV = TypeInfos[M - 1];
-
- PrintRelDirective();
-
- if (GV)
- O << Asm->getGlobalLinkName(GV);
- else
- O << "0";
-
- Asm->EOL("TypeInfo");
- }
-
- // Emit the filter typeids.
- for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) {
- unsigned TypeID = FilterIds[j];
- Asm->EmitULEB128Bytes(TypeID);
- Asm->EOL("Filter TypeInfo index");
- }
-
- Asm->EmitAlignment(2, 0, 0, false);
- }
-
-public:
- //===--------------------------------------------------------------------===//
- // Main entry points.
- //
- DwarfException(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
- : Dwarf(OS, A, T, "eh")
- , shouldEmitTable(false)
- , shouldEmitMoves(false)
- , shouldEmitTableModule(false)
- , shouldEmitMovesModule(false)
- {}
-
- virtual ~DwarfException() {}
-
- /// SetModuleInfo - Set machine module information when it's known that pass
- /// manager has created it. Set by the target AsmPrinter.
- void SetModuleInfo(MachineModuleInfo *mmi) {
- MMI = mmi;
- }
-
- /// BeginModule - Emit all exception information that should come prior to the
- /// content.
- void BeginModule(Module *M) {
- this->M = M;
- }
-
- /// EndModule - Emit all exception information that should come after the
- /// content.
- void EndModule() {
- if (shouldEmitMovesModule || shouldEmitTableModule) {
- const std::vector<Function *> Personalities = MMI->getPersonalities();
- for (unsigned i =0; i < Personalities.size(); ++i)
- EmitCommonEHFrame(Personalities[i], i);
-
- for (std::vector<FunctionEHFrameInfo>::iterator I = EHFrames.begin(),
- E = EHFrames.end(); I != E; ++I)
- EmitEHFrame(*I);
- }
- }
-
- /// BeginFunction - Gather pre-function exception information. Assumes being
- /// emitted immediately after the function entry point.
- void BeginFunction(MachineFunction *MF) {
- this->MF = MF;
- shouldEmitTable = shouldEmitMoves = false;
- if (MMI && TAI->doesSupportExceptionHandling()) {
-
- // Map all labels and get rid of any dead landing pads.
- MMI->TidyLandingPads();
- // If any landing pads survive, we need an EH table.
- if (MMI->getLandingPads().size())
- shouldEmitTable = true;
-
- // See if we need frame move info.
- if (!MF->getFunction()->doesNotThrow() || UnwindTablesMandatory)
- shouldEmitMoves = true;
-
- if (shouldEmitMoves || shouldEmitTable)
- // Assumes in correct section after the entry point.
- EmitLabel("eh_func_begin", ++SubprogramCount);
- }
- shouldEmitTableModule |= shouldEmitTable;
- shouldEmitMovesModule |= shouldEmitMoves;
- }
-
- /// EndFunction - Gather and emit post-function exception information.
- ///
- void EndFunction() {
- if (shouldEmitMoves || shouldEmitTable) {
- EmitLabel("eh_func_end", SubprogramCount);
- EmitExceptionTable();
-
- // Save EH frame information
- EHFrames.
- push_back(FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF),
- SubprogramCount,
- MMI->getPersonalityIndex(),
- MF->getFrameInfo()->hasCalls(),
- !MMI->getLandingPads().empty(),
- MMI->getFrameMoves(),
- MF->getFunction()));
- }
- }
-};
-
-} // End of namespace llvm
-
-//===----------------------------------------------------------------------===//
-
-/// Emit - Print the abbreviation using the specified Dwarf writer.
-///
-void DIEAbbrev::Emit(const DwarfDebug &DD) const {
- // Emit its Dwarf tag type.
- DD.getAsm()->EmitULEB128Bytes(Tag);
- DD.getAsm()->EOL(TagString(Tag));
-
- // Emit whether it has children DIEs.
- DD.getAsm()->EmitULEB128Bytes(ChildrenFlag);
- DD.getAsm()->EOL(ChildrenString(ChildrenFlag));
-
- // For each attribute description.
- for (unsigned i = 0, N = Data.size(); i < N; ++i) {
- const DIEAbbrevData &AttrData = Data[i];
-
- // Emit attribute type.
- DD.getAsm()->EmitULEB128Bytes(AttrData.getAttribute());
- DD.getAsm()->EOL(AttributeString(AttrData.getAttribute()));
-
- // Emit form type.
- DD.getAsm()->EmitULEB128Bytes(AttrData.getForm());
- DD.getAsm()->EOL(FormEncodingString(AttrData.getForm()));
- }
-
- // Mark end of abbreviation.
- DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(1)");
- DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(2)");
-}
-
-#ifndef NDEBUG
-void DIEAbbrev::print(std::ostream &O) {
- O << "Abbreviation @"
- << std::hex << (intptr_t)this << std::dec
- << " "
- << TagString(Tag)
- << " "
- << ChildrenString(ChildrenFlag)
- << "\n";
-
- for (unsigned i = 0, N = Data.size(); i < N; ++i) {
- O << " "
- << AttributeString(Data[i].getAttribute())
- << " "
- << FormEncodingString(Data[i].getForm())
- << "\n";
- }
-}
-void DIEAbbrev::dump() { print(cerr); }
-#endif
-
-//===----------------------------------------------------------------------===//
-
-#ifndef NDEBUG
-void DIEValue::dump() {
- print(cerr);
-}
-#endif
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit integer of appropriate size.
-///
-void DIEInteger::EmitValue(DwarfDebug &DD, unsigned Form) {
- switch (Form) {
- case DW_FORM_flag: // Fall thru
- case DW_FORM_ref1: // Fall thru
- case DW_FORM_data1: DD.getAsm()->EmitInt8(Integer); break;
- case DW_FORM_ref2: // Fall thru
- case DW_FORM_data2: DD.getAsm()->EmitInt16(Integer); break;
- case DW_FORM_ref4: // Fall thru
- case DW_FORM_data4: DD.getAsm()->EmitInt32(Integer); break;
- case DW_FORM_ref8: // Fall thru
- case DW_FORM_data8: DD.getAsm()->EmitInt64(Integer); break;
- case DW_FORM_udata: DD.getAsm()->EmitULEB128Bytes(Integer); break;
- case DW_FORM_sdata: DD.getAsm()->EmitSLEB128Bytes(Integer); break;
- default: assert(0 && "DIE Value form not supported yet"); break;
- }
-}
-
-/// SizeOf - Determine size of integer value in bytes.
-///
-unsigned DIEInteger::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- switch (Form) {
- case DW_FORM_flag: // Fall thru
- case DW_FORM_ref1: // Fall thru
- case DW_FORM_data1: return sizeof(int8_t);
- case DW_FORM_ref2: // Fall thru
- case DW_FORM_data2: return sizeof(int16_t);
- case DW_FORM_ref4: // Fall thru
- case DW_FORM_data4: return sizeof(int32_t);
- case DW_FORM_ref8: // Fall thru
- case DW_FORM_data8: return sizeof(int64_t);
- case DW_FORM_udata: return TargetAsmInfo::getULEB128Size(Integer);
- case DW_FORM_sdata: return TargetAsmInfo::getSLEB128Size(Integer);
- default: assert(0 && "DIE Value form not supported yet"); break;
- }
- return 0;
-}
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit string value.
-///
-void DIEString::EmitValue(DwarfDebug &DD, unsigned Form) {
- DD.getAsm()->EmitString(String);
-}
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit label value.
-///
-void DIEDwarfLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
- bool IsSmall = Form == DW_FORM_data4;
- DD.EmitReference(Label, false, IsSmall);
-}
-
-/// SizeOf - Determine size of label value in bytes.
-///
-unsigned DIEDwarfLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- if (Form == DW_FORM_data4) return 4;
- return DD.getTargetData()->getPointerSize();
-}
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit label value.
-///
-void DIEObjectLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
- bool IsSmall = Form == DW_FORM_data4;
- DD.EmitReference(Label, false, IsSmall);
-}
-
-/// SizeOf - Determine size of label value in bytes.
-///
-unsigned DIEObjectLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- if (Form == DW_FORM_data4) return 4;
- return DD.getTargetData()->getPointerSize();
-}
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit delta value.
-///
-void DIESectionOffset::EmitValue(DwarfDebug &DD, unsigned Form) {
- bool IsSmall = Form == DW_FORM_data4;
- DD.EmitSectionOffset(Label.Tag, Section.Tag,
- Label.Number, Section.Number, IsSmall, IsEH, UseSet);
-}
-
-/// SizeOf - Determine size of delta value in bytes.
-///
-unsigned DIESectionOffset::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- if (Form == DW_FORM_data4) return 4;
- return DD.getTargetData()->getPointerSize();
-}
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit delta value.
-///
-void DIEDelta::EmitValue(DwarfDebug &DD, unsigned Form) {
- bool IsSmall = Form == DW_FORM_data4;
- DD.EmitDifference(LabelHi, LabelLo, IsSmall);
-}
-
-/// SizeOf - Determine size of delta value in bytes.
-///
-unsigned DIEDelta::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- if (Form == DW_FORM_data4) return 4;
- return DD.getTargetData()->getPointerSize();
-}
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit debug information entry offset.
-///
-void DIEntry::EmitValue(DwarfDebug &DD, unsigned Form) {
- DD.getAsm()->EmitInt32(Entry->getOffset());
-}
-
-//===----------------------------------------------------------------------===//
-
-/// ComputeSize - calculate the size of the block.
-///
-unsigned DIEBlock::ComputeSize(DwarfDebug &DD) {
- if (!Size) {
- const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
-
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- Size += Values[i]->SizeOf(DD, AbbrevData[i].getForm());
- }
- }
- return Size;
-}
-
-/// EmitValue - Emit block data.
-///
-void DIEBlock::EmitValue(DwarfDebug &DD, unsigned Form) {
- switch (Form) {
- case DW_FORM_block1: DD.getAsm()->EmitInt8(Size); break;
- case DW_FORM_block2: DD.getAsm()->EmitInt16(Size); break;
- case DW_FORM_block4: DD.getAsm()->EmitInt32(Size); break;
- case DW_FORM_block: DD.getAsm()->EmitULEB128Bytes(Size); break;
- default: assert(0 && "Improper form for block"); break;
- }
-
- const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
-
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- DD.getAsm()->EOL();
- Values[i]->EmitValue(DD, AbbrevData[i].getForm());
- }
-}
-
-/// SizeOf - Determine size of block data in bytes.
-///
-unsigned DIEBlock::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- switch (Form) {
- case DW_FORM_block1: return Size + sizeof(int8_t);
- case DW_FORM_block2: return Size + sizeof(int16_t);
- case DW_FORM_block4: return Size + sizeof(int32_t);
- case DW_FORM_block: return Size + TargetAsmInfo::getULEB128Size(Size);
- default: assert(0 && "Improper form for block"); break;
- }
- return 0;
-}
-
-//===----------------------------------------------------------------------===//
-/// DIE Implementation
-
-DIE::~DIE() {
- for (unsigned i = 0, N = Children.size(); i < N; ++i)
- delete Children[i];
-}
-
-/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
-///
-void DIE::AddSiblingOffset() {
- DIEInteger *DI = new DIEInteger(0);
- Values.insert(Values.begin(), DI);
- Abbrev.AddFirstAttribute(DW_AT_sibling, DW_FORM_ref4);
-}
-
-/// Profile - Used to gather unique data for the value folding set.
-///
-void DIE::Profile(FoldingSetNodeID &ID) {
- Abbrev.Profile(ID);
-
- for (unsigned i = 0, N = Children.size(); i < N; ++i)
- ID.AddPointer(Children[i]);
-
- for (unsigned j = 0, M = Values.size(); j < M; ++j)
- ID.AddPointer(Values[j]);
-}
-
-#ifndef NDEBUG
-void DIE::print(std::ostream &O, unsigned IncIndent) {
- static unsigned IndentCount = 0;
- IndentCount += IncIndent;
- const std::string Indent(IndentCount, ' ');
- bool isBlock = Abbrev.getTag() == 0;
-
- if (!isBlock) {
- O << Indent
- << "Die: "
- << "0x" << std::hex << (intptr_t)this << std::dec
- << ", Offset: " << Offset
- << ", Size: " << Size
- << "\n";
-
- O << Indent
- << TagString(Abbrev.getTag())
- << " "
- << ChildrenString(Abbrev.getChildrenFlag());
- } else {
- O << "Size: " << Size;
- }
- O << "\n";
-
- const SmallVector<DIEAbbrevData, 8> &Data = Abbrev.getData();
-
- IndentCount += 2;
- for (unsigned i = 0, N = Data.size(); i < N; ++i) {
- O << Indent;
-
- if (!isBlock)
- O << AttributeString(Data[i].getAttribute());
- else
- O << "Blk[" << i << "]";
-
- O << " "
- << FormEncodingString(Data[i].getForm())
- << " ";
- Values[i]->print(O);
- O << "\n";
- }
- IndentCount -= 2;
-
- for (unsigned j = 0, M = Children.size(); j < M; ++j) {
- Children[j]->print(O, 4);
- }
-
- if (!isBlock) O << "\n";
- IndentCount -= IncIndent;
-}
-
-void DIE::dump() {
- print(cerr);
-}
-#endif
-
-//===----------------------------------------------------------------------===//
-/// DwarfWriter Implementation
-///
-
-DwarfWriter::DwarfWriter(std::ostream &OS, AsmPrinter *A,
- const TargetAsmInfo *T) {
- DE = new DwarfException(OS, A, T);
- DD = new DwarfDebug(OS, A, T);
-}
-
-DwarfWriter::~DwarfWriter() {
- delete DE;
- delete DD;
-}
-
-/// SetModuleInfo - Set machine module info when it's known that pass manager
-/// has created it. Set by the target AsmPrinter.
-void DwarfWriter::SetModuleInfo(MachineModuleInfo *MMI) {
- DD->SetModuleInfo(MMI);
- DE->SetModuleInfo(MMI);
-}
-
-/// BeginModule - Emit all Dwarf sections that should come prior to the
-/// content.
-void DwarfWriter::BeginModule(Module *M) {
- DE->BeginModule(M);
- DD->BeginModule(M);
-}
-
-/// EndModule - Emit all Dwarf sections that should come after the content.
-///
-void DwarfWriter::EndModule() {
- DE->EndModule();
- DD->EndModule();
-}
-
-/// BeginFunction - Gather pre-function debug information. Assumes being
-/// emitted immediately after the function entry point.
-void DwarfWriter::BeginFunction(MachineFunction *MF) {
- DE->BeginFunction(MF);
- DD->BeginFunction(MF);
-}
-
-/// EndFunction - Gather and emit post-function debug information.
-///
-void DwarfWriter::EndFunction() {
- DD->EndFunction();
- DE->EndFunction();
-
- if (MachineModuleInfo *MMI = DD->getMMI() ? DD->getMMI() : DE->getMMI())
- // Clear function debug information.
- MMI->EndFunction();
-}
Modified: llvm/trunk/lib/CodeGen/Makefile
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/Makefile?rev=54885&r1=54884&r2=54885&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/Makefile (original)
+++ llvm/trunk/lib/CodeGen/Makefile Sun Aug 17 08:53:04 2008
@@ -9,7 +9,7 @@
LEVEL = ../..
LIBRARYNAME = LLVMCodeGen
-PARALLEL_DIRS = SelectionDAG
+PARALLEL_DIRS = SelectionDAG AsmPrinter
BUILD_ARCHIVE = 1
include $(LEVEL)/Makefile.common
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