[llvm-commits] [llvm] r47621 - in /llvm/trunk: include/llvm-c/lto.h tools/lto2/ tools/lto2/LTOCodeGenerator.cpp tools/lto2/LTOCodeGenerator.h tools/lto2/LTOModule.cpp tools/lto2/LTOModule.h tools/lto2/Makefile tools/lto2/lto.cpp tools/lto2/lto.exports
Nick Kledzik
kledzik at apple.com
Tue Feb 26 12:26:44 PST 2008
Author: kledzik
Date: Tue Feb 26 14:26:43 2008
New Revision: 47621
URL: http://llvm.org/viewvc/llvm-project?rev=47621&view=rev
Log:
first commit of new LTO system. It is not hooked up in the llvm/tools/Makefile, so no one will build it be default yet
Added:
llvm/trunk/include/llvm-c/lto.h
llvm/trunk/tools/lto2/
llvm/trunk/tools/lto2/LTOCodeGenerator.cpp
llvm/trunk/tools/lto2/LTOCodeGenerator.h
llvm/trunk/tools/lto2/LTOModule.cpp
llvm/trunk/tools/lto2/LTOModule.h
llvm/trunk/tools/lto2/Makefile
llvm/trunk/tools/lto2/lto.cpp
llvm/trunk/tools/lto2/lto.exports
Added: llvm/trunk/include/llvm-c/lto.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm-c/lto.h?rev=47621&view=auto
==============================================================================
--- llvm/trunk/include/llvm-c/lto.h (added)
+++ llvm/trunk/include/llvm-c/lto.h Tue Feb 26 14:26:43 2008
@@ -0,0 +1,234 @@
+/*===-- llvm-c/lto.h - LTO Public C Interface ---------------------*- C -*-===*\
+|* *|
+|* The LLVM Compiler Infrastructure *|
+|* *|
+|* This file is distributed under the University of Illinois Open Source *|
+|* License. See LICENSE.TXT for details. *|
+|* *|
+|*===----------------------------------------------------------------------===*|
+|* *|
+|* This header provides public interface to an abstract link time optimization*|
+|* library. LLVM provides an implementation of this interface for use with *|
+|* llvm bitcode files. *|
+|* *|
+\*===----------------------------------------------------------------------===*/
+
+#ifndef LTO_H
+#define LTO_H 1
+
+#include <stdbool.h>
+#include <stddef.h>
+
+typedef enum {
+ LTO_SYMBOL_ALIGNMENT_MASK = 0x0000001F, /* log2 of alignment */
+ LTO_SYMBOL_PERMISSIONS_MASK = 0x000000E0,
+ LTO_SYMBOL_PERMISSIONS_CODE = 0x000000A0,
+ LTO_SYMBOL_PERMISSIONS_DATA = 0x000000C0,
+ LTO_SYMBOL_PERMISSIONS_RODATA = 0x00000080,
+ LTO_SYMBOL_DEFINITION_MASK = 0x00000700,
+ LTO_SYMBOL_DEFINITION_REGULAR = 0x00000100,
+ LTO_SYMBOL_DEFINITION_TENTATIVE = 0x00000200,
+ LTO_SYMBOL_DEFINITION_WEAK = 0x00000300,
+ LTO_SYMBOL_DEFINITION_UNDEFINED = 0x00000400,
+ LTO_SYMBOL_SCOPE_MASK = 0x00001800,
+ LTO_SYMBOL_SCOPE_INTERNAL = 0x00000800,
+ LTO_SYMBOL_SCOPE_HIDDEN = 0x00001000,
+ LTO_SYMBOL_SCOPE_DEFAULT = 0x00001800
+} lto_symbol_attributes;
+
+typedef enum {
+ LTO_DEBUG_MODEL_NONE = 0,
+ LTO_DEBUG_MODEL_DWARF = 1
+} lto_debug_model;
+
+typedef enum {
+ LTO_CODEGEN_PIC_MODEL_STATIC = 0,
+ LTO_CODEGEN_PIC_MODEL_DYNAMIC = 1,
+ LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC = 2
+} lto_codegen_model;
+
+
+/** opaque reference to a loaded object module */
+typedef struct LTOModule* lto_module_t;
+
+/** opaque reference to a code generator */
+typedef struct LTOCodeGenerator* lto_code_gen_t;
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Returns a printable string.
+ */
+extern const char*
+lto_get_version();
+
+
+/**
+ * Returns the last error string or NULL if last operation was sucessful.
+ */
+extern const char*
+lto_get_error_message();
+
+
+/**
+ * Checks if a file is a loadable object file.
+ */
+extern bool
+lto_module_is_object_file(const char* path);
+
+
+/**
+ * Checks if a file is a loadable object compiled for requested target.
+ */
+extern bool
+lto_module_is_object_file_for_target(const char* path,
+ const char* target_triple_prefix);
+
+
+/**
+ * Checks if a buffer is a loadable object file.
+ */
+extern bool
+lto_module_is_object_file_in_memory(const void* mem, size_t length);
+
+
+/**
+ * Checks if a buffer is a loadable object compiled for requested target.
+ */
+extern bool
+lto_module_is_object_file_in_memory_for_target(const void* mem, size_t length,
+ const char* target_triple_prefix);
+
+
+/**
+ * Loads an object file from disk.
+ * Returns NULL on error (check lto_get_error_message() for details).
+ */
+extern lto_module_t
+lto_module_create(const char* path);
+
+
+/**
+ * Loads an object file from memory.
+ * Returns NULL on error (check lto_get_error_message() for details).
+ */
+extern lto_module_t
+lto_module_create_from_memory(const void* mem, size_t length);
+
+
+/**
+ * Frees all memory internally allocated by the module.
+ * Upon return the lto_module_t is no longer valid.
+ */
+extern void
+lto_module_dispose(lto_module_t mod);
+
+
+/**
+ * Returns triple string which the object module was compiled under.
+ */
+extern const char*
+lto_module_get_target_triple(lto_module_t mod);
+
+
+/**
+ * Returns the number of symbols in the object module.
+ */
+extern unsigned int
+lto_module_get_num_symbols(lto_module_t mod);
+
+
+/**
+ * Returns the name of the ith symbol in the object module.
+ */
+extern const char*
+lto_module_get_symbol_name(lto_module_t mod, unsigned int index);
+
+
+/**
+ * Returns the attributes of the ith symbol in the object module.
+ */
+extern lto_symbol_attributes
+lto_module_get_symbol_attribute(lto_module_t mod, unsigned int index);
+
+
+/**
+ * Instantiates a code generator.
+ * Returns NULL on error (check lto_get_error_message() for details).
+ */
+extern lto_code_gen_t
+lto_codegen_create();
+
+
+/**
+ * Frees all code generator and all memory it internally allocated.
+ * Upon return the lto_code_gen_t is no longer valid.
+ */
+extern void
+lto_codegen_dispose(lto_code_gen_t);
+
+
+
+/**
+ * Add an object module to the set of modules for which code will be generated.
+ * Returns true on error (check lto_get_error_message() for details).
+ */
+extern bool
+lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod);
+
+
+
+/**
+ * Sets if debug info should be generated.
+ * Returns true on error (check lto_get_error_message() for details).
+ */
+extern bool
+lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model);
+
+
+/**
+ * Sets which PIC code model to generated.
+ * Returns true on error (check lto_get_error_message() for details).
+ */
+extern bool
+lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model);
+
+
+/**
+ * Adds to a list of all global symbols that must exist in the final
+ * generated code. If a function is not listed, it might be
+ * inlined into every usage and optimized away.
+ */
+extern void
+lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg, const char* symbol);
+
+
+/**
+ * Writes a new object file at the specified path that contains the
+ * merged contents of all modules added so far.
+ * Returns true on error (check lto_get_error_message() for details).
+ */
+extern bool
+lto_codegen_write_merged_modules(lto_code_gen_t cg, const char* path);
+
+
+/**
+ * Generates code for all added modules into one native object file.
+ * On sucess returns a pointer to a generated mach-o/ELF buffer and
+ * length set to the buffer size. Client owns the buffer and should
+ * free() it when done.
+ * On failure, returns NULL (check lto_get_error_message() for details).
+ */
+extern void*
+lto_codegen_compile(lto_code_gen_t cg, size_t* length);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif
Added: llvm/trunk/tools/lto2/LTOCodeGenerator.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lto2/LTOCodeGenerator.cpp?rev=47621&view=auto
==============================================================================
--- llvm/trunk/tools/lto2/LTOCodeGenerator.cpp (added)
+++ llvm/trunk/tools/lto2/LTOCodeGenerator.cpp Tue Feb 26 14:26:43 2008
@@ -0,0 +1,465 @@
+//===-LTOCodeGenerator.cpp - LLVM Link Time Optimizer ---------------------===//
+//
+// 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 Link Time Optimization library. This library is
+// intended to be used by linker to optimize code at link time.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Module.h"
+#include "llvm/PassManager.h"
+#include "llvm/Linker.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/ModuleProvider.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileUtilities.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/System/Program.h"
+#include "llvm/System/Signals.h"
+#include "llvm/Analysis/Passes.h"
+#include "llvm/Analysis/LoopPass.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/CodeGen/FileWriters.h"
+#include "llvm/Target/SubtargetFeature.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetMachineRegistry.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Transforms/IPO.h"
+#include "llvm/Transforms/Scalar.h"
+#include "llvm/Analysis/LoadValueNumbering.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Config/config.h"
+
+#include "LTOModule.h"
+#include "LTOCodeGenerator.h"
+
+#include <fstream>
+#include <unistd.h>
+#include <stdlib.h>
+#include <fcntl.h>
+
+
+using namespace llvm;
+
+
+
+const char* LTOCodeGenerator::getVersionString()
+{
+#ifdef LLVM_VERSION_INFO
+ return PACKAGE_NAME " version " PACKAGE_VERSION ", " LLVM_VERSION_INFO;
+#else
+ return PACKAGE_NAME " version " PACKAGE_VERSION;
+#endif
+}
+
+
+LTOCodeGenerator::LTOCodeGenerator()
+ : _linker("LinkTimeOptimizer", "ld-temp.o"), _target(NULL),
+ _emitDwarfDebugInfo(false), _scopeRestrictionsDone(false),
+ _codeModel(LTO_CODEGEN_PIC_MODEL_DYNAMIC)
+{
+
+}
+
+LTOCodeGenerator::~LTOCodeGenerator()
+{
+ // FIXME
+}
+
+
+
+bool LTOCodeGenerator::addModule(LTOModule* mod, std::string& errMsg)
+{
+ return _linker.LinkInModule(mod->getLLVVMModule(), &errMsg);
+}
+
+
+bool LTOCodeGenerator::setDebugInfo(lto_debug_model debug, std::string& errMsg)
+{
+ switch (debug) {
+ case LTO_DEBUG_MODEL_NONE:
+ _emitDwarfDebugInfo = false;
+ return false;
+
+ case LTO_DEBUG_MODEL_DWARF:
+ _emitDwarfDebugInfo = true;
+ return false;
+ }
+ errMsg = "unknown debug format";
+ return true;
+}
+
+
+bool LTOCodeGenerator::setCodePICModel(lto_codegen_model model,
+ std::string& errMsg)
+{
+ switch (model) {
+ case LTO_CODEGEN_PIC_MODEL_STATIC:
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
+ _codeModel = model;
+ return false;
+ }
+ errMsg = "unknown pic model";
+ return true;
+}
+
+
+void LTOCodeGenerator::addMustPreserveSymbol(const char* sym)
+{
+ _mustPreserveSymbols[sym] = 1;
+}
+
+
+bool LTOCodeGenerator::writeMergedModules(const char* path, std::string& errMsg)
+{
+ if ( this->determineTarget(errMsg) )
+ return true;
+
+ // mark which symbols can not be internalized
+ this->applyScopeRestrictions();
+
+ // create output file
+ std::ofstream out(path, std::ios_base::out|std::ios::trunc|std::ios::binary);
+ if ( out.fail() ) {
+ errMsg = "could not open bitcode file for writing: ";
+ errMsg += path;
+ return true;
+ }
+
+ // write bitcode to it
+ WriteBitcodeToFile(_linker.getModule(), out);
+ if ( out.fail() ) {
+ errMsg = "could not write bitcode file: ";
+ errMsg += path;
+ return true;
+ }
+
+ return false;
+}
+
+
+void* LTOCodeGenerator::compile(size_t* length, std::string& errMsg)
+{
+ // make unqiue temp .s file to put generated assembly code
+ sys::Path uniqueAsmPath("lto-llvm.s");
+ if ( uniqueAsmPath.createTemporaryFileOnDisk(true, &errMsg) )
+ return NULL;
+ sys::RemoveFileOnSignal(uniqueAsmPath);
+
+ // generate assembly code
+ std::ofstream asmFile(uniqueAsmPath.c_str());
+ bool genResult = this->generateAssemblyCode(asmFile, errMsg);
+ asmFile.close();
+ if ( genResult ) {
+ if ( uniqueAsmPath.exists() )
+ uniqueAsmPath.eraseFromDisk();
+ return NULL;
+ }
+
+ // make unqiue temp .o file to put generated object file
+ sys::PathWithStatus uniqueObjPath("lto-llvm.o");
+ if ( uniqueObjPath.createTemporaryFileOnDisk(true, &errMsg) ) {
+ if ( uniqueAsmPath.exists() )
+ uniqueAsmPath.eraseFromDisk();
+ return NULL;
+ }
+ sys::RemoveFileOnSignal(uniqueObjPath);
+
+ // assemble the assembly code
+ void* buffer = NULL;
+ bool asmResult = this->assemble(uniqueAsmPath.toString(),
+ uniqueObjPath.toString(), errMsg);
+ if ( !asmResult ) {
+ // read .o file into memory buffer
+ const sys::FileStatus* objStatus;
+ objStatus = uniqueObjPath.getFileStatus(false, &errMsg);
+ if ( objStatus != NULL ) {
+ *length = objStatus->getSize();
+ // use malloc() because caller will own this buffer and free() it
+ buffer = ::malloc(*length);
+ if ( buffer != NULL ) {
+ int fd = ::open(uniqueObjPath.c_str(), O_RDONLY, 0);
+ if ( fd != -1 ) {
+ // read object file contents into buffer
+ if ( ::read(fd, buffer, *length) != (ssize_t)*length ) {
+ errMsg = "error reading object file";
+ free(buffer);
+ buffer = NULL;
+ }
+ close(fd);
+ }
+ else {
+ errMsg = "error opening object file";
+ free(buffer);
+ buffer = NULL;
+ }
+ }
+ else {
+ errMsg = "error mallocing space for object file";
+ }
+ }
+ else {
+ errMsg = "error stat'ing object file";
+ }
+ }
+ // clean up temp files
+ uniqueAsmPath.eraseFromDisk();
+ uniqueObjPath.eraseFromDisk();
+ return buffer;
+}
+
+
+bool LTOCodeGenerator::assemble(const std::string& asmPath,
+ const std::string& objPath, std::string& errMsg)
+{
+ // find compiler driver
+ const sys::Path gcc = sys::Program::FindProgramByName("gcc");
+ if ( gcc.isEmpty() ) {
+ errMsg = "can't locate gcc";
+ return true;
+ }
+
+ // build argument list
+ std::vector<const char*> args;
+ std::string targetTriple = _linker.getModule()->getTargetTriple();
+ args.push_back(gcc.c_str());
+ if ( targetTriple.find("darwin") != targetTriple.size() ) {
+ if (strncmp(targetTriple.c_str(), "i686-apple-", 11) == 0) {
+ args.push_back("-arch");
+ args.push_back("i386");
+ }
+ else if (strncmp(targetTriple.c_str(), "x86_64-apple-", 13) == 0) {
+ args.push_back("-arch");
+ args.push_back("x86_64");
+ }
+ else if (strncmp(targetTriple.c_str(), "powerpc-apple-", 14) == 0) {
+ args.push_back("-arch");
+ args.push_back("ppc");
+ }
+ else if (strncmp(targetTriple.c_str(), "powerpc64-apple-", 16) == 0) {
+ args.push_back("-arch");
+ args.push_back("ppc64");
+ }
+ }
+ args.push_back("-c");
+ args.push_back("-x");
+ args.push_back("assembler");
+ args.push_back("-o");
+ args.push_back(objPath.c_str());
+ args.push_back(asmPath.c_str());
+ args.push_back(0);
+
+ // invoke assembler
+ if ( sys::Program::ExecuteAndWait(gcc, &args[0], 0, 0, 0, 0, &errMsg) ) {
+ errMsg = "error in assembly";
+ return true;
+ }
+ return false; // success
+}
+
+
+
+bool LTOCodeGenerator::determineTarget(std::string& errMsg)
+{
+ if ( _target == NULL ) {
+ // create target machine from info for merged modules
+ Module* mergedModule = _linker.getModule();
+ const TargetMachineRegistry::entry* march =
+ TargetMachineRegistry::getClosestStaticTargetForModule(
+ *mergedModule, errMsg);
+ if ( march == NULL )
+ return true;
+ std::string features;
+ _target = march->CtorFn(*mergedModule, features);
+ }
+ return false;
+}
+
+void LTOCodeGenerator::applyScopeRestrictions()
+{
+ if ( !_scopeRestrictionsDone ) {
+ Module* mergedModule = _linker.getModule();
+
+ // Start off with a verification pass.
+ PassManager passes;
+ passes.add(createVerifierPass());
+
+ // mark which symbols can not be internalized
+ if ( !_mustPreserveSymbols.empty() ) {
+ Mangler mangler(*mergedModule,
+ _target->getTargetAsmInfo()->getGlobalPrefix());
+ std::vector<const char*> mustPreserveList;
+ for (Module::iterator f = mergedModule->begin(),
+ e = mergedModule->end(); f != e; ++f) {
+ if ( !f->isDeclaration()
+ && _mustPreserveSymbols.count(mangler.getValueName(f)) )
+ mustPreserveList.push_back(::strdup(f->getName().c_str()));
+ }
+ for (Module::global_iterator v = mergedModule->global_begin(),
+ e = mergedModule->global_end(); v != e; ++v) {
+ if ( !v->isDeclaration()
+ && _mustPreserveSymbols.count(mangler.getValueName(v)) )
+ mustPreserveList.push_back(::strdup(v->getName().c_str()));
+ }
+ passes.add(createInternalizePass(mustPreserveList));
+ }
+ // apply scope restrictions
+ passes.run(*mergedModule);
+
+ _scopeRestrictionsDone = true;
+ }
+}
+
+
+/// Optimize merged modules using various IPO passes
+bool LTOCodeGenerator::generateAssemblyCode(std::ostream& out, std::string& errMsg)
+{
+ if ( this->determineTarget(errMsg) )
+ return true;
+
+ // mark which symbols can not be internalized
+ this->applyScopeRestrictions();
+
+ Module* mergedModule = _linker.getModule();
+
+ // If target supports exception handling then enable it now.
+ if ( _target->getTargetAsmInfo()->doesSupportExceptionHandling() )
+ llvm::ExceptionHandling = true;
+
+ // set codegen model
+ switch( _codeModel ) {
+ case LTO_CODEGEN_PIC_MODEL_STATIC:
+ _target->setRelocationModel(Reloc::Static);
+ break;
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
+ _target->setRelocationModel(Reloc::PIC_);
+ break;
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
+ _target->setRelocationModel(Reloc::DynamicNoPIC);
+ break;
+ }
+
+ // Instantiate the pass manager to organize the passes.
+ PassManager passes;
+
+ // Start off with a verification pass.
+ passes.add(createVerifierPass());
+
+ // Add an appropriate TargetData instance for this module...
+ passes.add(new TargetData(*_target->getTargetData()));
+
+ // Now that we internalized some globals, see if we can hack on them!
+ passes.add(createGlobalOptimizerPass());
+
+ // Linking modules together can lead to duplicated global constants, only
+ // keep one copy of each constant...
+ passes.add(createConstantMergePass());
+
+ // If the -s command line option was specified, strip the symbols out of the
+ // resulting program to make it smaller. -s is a GLD option that we are
+ // supporting.
+ if( !llvm::ExceptionHandling ) {
+ // FIXME : This causes multiple nameless _.eh symbols on
+ // darwin when EH is ON.
+ passes.add(createStripSymbolsPass());
+ }
+
+ // Propagate constants at call sites into the functions they call.
+ passes.add(createIPConstantPropagationPass());
+
+ // Remove unused arguments from functions...
+ passes.add(createDeadArgEliminationPass());
+
+ passes.add(createFunctionInliningPass()); // Inline small functions
+
+ passes.add(createPruneEHPass()); // Remove dead EH info
+
+ passes.add(createGlobalDCEPass()); // Remove dead functions
+
+ // If we didn't decide to inline a function, check to see if we can
+ // transform it to pass arguments by value instead of by reference.
+ passes.add(createArgumentPromotionPass());
+
+ // The IPO passes may leave cruft around. Clean up after them.
+ passes.add(createInstructionCombiningPass());
+
+ passes.add(createScalarReplAggregatesPass()); // Break up allocas
+
+ // Run a few AA driven optimizations here and now, to cleanup the code.
+ passes.add(createGlobalsModRefPass()); // IP alias analysis
+
+ passes.add(createLICMPass()); // Hoist loop invariants
+ passes.add(createLoadValueNumberingPass()); // GVN for load instrs
+ passes.add(createGCSEPass()); // Remove common subexprs
+ passes.add(createDeadStoreEliminationPass()); // Nuke dead stores
+
+ // Cleanup and simplify the code after the scalar optimizations.
+ passes.add(createInstructionCombiningPass());
+
+ // Delete basic blocks, which optimization passes may have killed...
+ passes.add(createCFGSimplificationPass());
+
+ // Now that we have optimized the program, discard unreachable functions...
+ passes.add(createGlobalDCEPass());
+
+ // Make sure everything is still good.
+ passes.add(createVerifierPass());
+
+ FunctionPassManager* codeGenPasses =
+ new FunctionPassManager(new ExistingModuleProvider(mergedModule));
+
+ codeGenPasses->add(new TargetData(*_target->getTargetData()));
+
+ MachineCodeEmitter* mce = NULL;
+
+ switch (_target->addPassesToEmitFile(*codeGenPasses, out,
+ TargetMachine::AssemblyFile, true)) {
+ case FileModel::MachOFile:
+ mce = AddMachOWriter(*codeGenPasses, out, *_target);
+ break;
+ case FileModel::ElfFile:
+ mce = AddELFWriter(*codeGenPasses, out, *_target);
+ break;
+ case FileModel::AsmFile:
+ break;
+ case FileModel::Error:
+ case FileModel::None:
+ errMsg = "target file type not supported";
+ return true;
+ }
+
+ if (_target->addPassesToEmitFileFinish(*codeGenPasses, mce, true)) {
+ errMsg = "target does not support generation of this file type";
+ return true;
+ }
+
+ // Run our queue of passes all at once now, efficiently.
+ passes.run(*mergedModule);
+
+ // Run the code generator, and write assembly file
+ codeGenPasses->doInitialization();
+ for (Module::iterator it = mergedModule->begin(),
+ e = mergedModule->end(); it != e; ++it) {
+ if (!it->isDeclaration())
+ codeGenPasses->run(*it);
+ }
+ codeGenPasses->doFinalization();
+
+ return false; // success
+}
+
+
+
Added: llvm/trunk/tools/lto2/LTOCodeGenerator.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lto2/LTOCodeGenerator.h?rev=47621&view=auto
==============================================================================
--- llvm/trunk/tools/lto2/LTOCodeGenerator.h (added)
+++ llvm/trunk/tools/lto2/LTOCodeGenerator.h Tue Feb 26 14:26:43 2008
@@ -0,0 +1,59 @@
+//===-LTOCodeGenerator.h - LLVM Link Time Optimizer -----------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the LTOCodeGenerator class.
+//
+//===----------------------------------------------------------------------===//
+
+
+#ifndef LTO_CODE_GENERATOR_H
+#define LTO_CODE_GENERATOR_H
+
+#include "llvm/Linker.h"
+#include "llvm/ADT/StringMap.h"
+
+
+
+//
+// C++ class which implements the opaque lto_code_gen_t
+//
+class LTOCodeGenerator {
+public:
+ static const char* getVersionString();
+
+ LTOCodeGenerator();
+ ~LTOCodeGenerator();
+
+ bool addModule(class LTOModule*, std::string& errMsg);
+ bool setDebugInfo(lto_debug_model, std::string& errMsg);
+ bool setCodePICModel(lto_codegen_model, std::string& errMsg);
+ void addMustPreserveSymbol(const char* sym);
+ bool writeMergedModules(const char* path, std::string& errMsg);
+ void* compile(size_t* length, std::string& errMsg);
+
+private:
+ bool generateAssemblyCode(std::ostream& out,
+ std::string& errMsg);
+ bool assemble(const std::string& asmPath,
+ const std::string& objPath, std::string& errMsg);
+ void applyScopeRestrictions();
+ bool determineTarget(std::string& errMsg);
+
+ typedef llvm::StringMap<uint8_t> StringSet;
+
+ llvm::Linker _linker;
+ llvm::TargetMachine* _target;
+ bool _emitDwarfDebugInfo;
+ bool _scopeRestrictionsDone;
+ lto_codegen_model _codeModel;
+ StringSet _mustPreserveSymbols;
+};
+
+#endif // LTO_CODE_GENERATOR_H
+
Added: llvm/trunk/tools/lto2/LTOModule.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lto2/LTOModule.cpp?rev=47621&view=auto
==============================================================================
--- llvm/trunk/tools/lto2/LTOModule.cpp (added)
+++ llvm/trunk/tools/lto2/LTOModule.cpp Tue Feb 26 14:26:43 2008
@@ -0,0 +1,329 @@
+//===-LTOModule.cpp - LLVM Link Time Optimizer ----------------------------===//
+//
+// 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 Link Time Optimization library. This library is
+// intended to be used by linker to optimize code at link time.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Module.h"
+#include "llvm/PassManager.h"
+#include "llvm/Linker.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/ModuleProvider.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileUtilities.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/System/Program.h"
+#include "llvm/System/Path.h"
+#include "llvm/System/Signals.h"
+#include "llvm/Target/SubtargetFeature.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetMachineRegistry.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Transforms/IPO.h"
+#include "llvm/Transforms/Scalar.h"
+#include "llvm/Analysis/LoadValueNumbering.h"
+#include "llvm/Support/MathExtras.h"
+
+#include "LTOModule.h"
+
+#include <fstream>
+
+using namespace llvm;
+
+bool LTOModule::isBitcodeFile(const void* mem, size_t length)
+{
+ return ( llvm::sys::IdentifyFileType((char*)mem, length)
+ == llvm::sys::Bitcode_FileType );
+}
+
+bool LTOModule::isBitcodeFile(const char* path)
+{
+ return llvm::sys::Path(path).isBitcodeFile();
+}
+
+bool LTOModule::isBitcodeFileForTarget(const void* mem,
+ size_t length, const char* triplePrefix)
+{
+ bool result = false;
+ MemoryBuffer* buffer;
+ buffer = MemoryBuffer::getMemBuffer((char*)mem, (char*)mem+length);
+ if ( buffer != NULL ) {
+ ModuleProvider* mp = getBitcodeModuleProvider(buffer);
+ if ( mp != NULL ) {
+ std::string actualTarget = mp->getModule()->getTargetTriple();
+ if ( strncmp(actualTarget.c_str(), triplePrefix,
+ strlen(triplePrefix)) == 0) {
+ result = true;
+ }
+ // mp destructor will delete buffer
+ delete mp;
+ }
+ else {
+ // if getBitcodeModuleProvider failed, we need to delete buffer
+ delete buffer;
+ }
+ }
+ return result;
+}
+
+bool LTOModule::isBitcodeFileForTarget(const char* path,
+ const char* triplePrefix)
+{
+ bool result = false;
+ MemoryBuffer* buffer;
+ buffer = MemoryBuffer::getFile(path, strlen(path));
+ if ( buffer != NULL ) {
+ ModuleProvider* mp = getBitcodeModuleProvider(buffer);
+ if ( mp != NULL ) {
+ std::string actualTarget = mp->getModule()->getTargetTriple();
+ if ( strncmp(actualTarget.c_str(), triplePrefix,
+ strlen(triplePrefix)) == 0) {
+ result = true;
+ }
+ // mp destructor will delete buffer
+ delete mp;
+ }
+ else {
+ // if getBitcodeModuleProvider failed, we need to delete buffer
+ delete buffer;
+ }
+ }
+ return result;
+}
+
+
+LTOModule::LTOModule(Module* m, TargetMachine* t)
+ : _module(m), _target(t), _symbolsParsed(false)
+{
+}
+
+LTOModule::~LTOModule()
+{
+ delete _module;
+ if ( _target != NULL )
+ delete _target;
+}
+
+
+LTOModule* LTOModule::makeLTOModule(const char* path, std::string& errMsg)
+{
+ MemoryBuffer* buffer = MemoryBuffer::getFile(path, strlen(path));
+ if ( buffer != NULL ) {
+ Module* m = ParseBitcodeFile(buffer, &errMsg);
+ delete buffer;
+ if ( m != NULL ) {
+ const TargetMachineRegistry::entry* march =
+ TargetMachineRegistry::getClosestStaticTargetForModule(*m, errMsg);
+ if ( march != NULL ) {
+ std::string features;
+ TargetMachine* target = march->CtorFn(*m, features);
+ return new LTOModule(m, target);
+ }
+ }
+ }
+ return NULL;
+}
+
+LTOModule* LTOModule::makeLTOModule(const void* mem, size_t length,
+ std::string& errMsg)
+{
+ MemoryBuffer* buffer;
+ buffer = MemoryBuffer::getMemBuffer((char*)mem, (char*)mem+length);
+ if ( buffer != NULL ) {
+ Module* m = ParseBitcodeFile(buffer, &errMsg);
+ delete buffer;
+ if ( m != NULL ) {
+ const TargetMachineRegistry::entry* march =
+ TargetMachineRegistry::getClosestStaticTargetForModule(*m, errMsg);
+ if ( march != NULL ) {
+ std::string features;
+ TargetMachine* target = march->CtorFn(*m, features);
+ return new LTOModule(m, target);
+ }
+ }
+ }
+ return NULL;
+}
+
+
+const char* LTOModule::getTargetTriple()
+{
+ return _module->getTargetTriple().c_str();
+}
+
+void LTOModule::addDefinedSymbol(GlobalValue* def, Mangler &mangler,
+ bool isFunction)
+{
+ const char* symbolName = ::strdup(mangler.getValueName(def).c_str());
+
+ // set alignment part log2() can have rounding errors
+ uint32_t align = def->getAlignment();
+ uint32_t attr = align ? __builtin_ctz(def->getAlignment()) : 0;
+
+ // set permissions part
+ if ( isFunction )
+ attr |= LTO_SYMBOL_PERMISSIONS_CODE;
+ else {
+ GlobalVariable* gv = dyn_cast<GlobalVariable>(def);
+ if ( (gv != NULL) && gv->isConstant() )
+ attr |= LTO_SYMBOL_PERMISSIONS_RODATA;
+ else
+ attr |= LTO_SYMBOL_PERMISSIONS_DATA;
+ }
+
+ // set definition part
+ if ( def->hasWeakLinkage() || def->hasLinkOnceLinkage() ) {
+ // lvm bitcode does not differenciate between weak def data
+ // and tentative definitions!
+ // HACK HACK HACK
+ // C++ does not use tentative definitions, but does use weak symbols
+ // so guess that anything that looks like a C++ symbol is weak and others
+ // are tentative definitions
+ if ( (strncmp(symbolName, "__Z", 3) == 0) )
+ attr |= LTO_SYMBOL_DEFINITION_WEAK;
+ else {
+ attr |= LTO_SYMBOL_DEFINITION_TENTATIVE;
+ }
+ }
+ else {
+ attr |= LTO_SYMBOL_DEFINITION_REGULAR;
+ }
+
+ // set scope part
+ if ( def->hasHiddenVisibility() )
+ attr |= LTO_SYMBOL_SCOPE_HIDDEN;
+ else if ( def->hasExternalLinkage() || def->hasWeakLinkage() )
+ attr |= LTO_SYMBOL_SCOPE_DEFAULT;
+ else
+ attr |= LTO_SYMBOL_SCOPE_INTERNAL;
+
+ // add to table of symbols
+ NameAndAttributes info;
+ info.name = symbolName;
+ info.attributes = (lto_symbol_attributes)attr;
+ _symbols.push_back(info);
+ _defines[info.name] = 1;
+}
+
+
+void LTOModule::addUndefinedSymbol(const char* name)
+{
+ // ignore all llvm.* symbols
+ if ( strncmp(name, "llvm.", 5) != 0 ) {
+ _undefines[name] = 1;
+ }
+}
+
+
+
+// Find exeternal symbols referenced by VALUE. This is a recursive function.
+void LTOModule::findExternalRefs(Value* value, Mangler &mangler) {
+
+ if (GlobalValue* gv = dyn_cast<GlobalValue>(value)) {
+ if ( !gv->hasExternalLinkage() )
+ addUndefinedSymbol(mangler.getValueName(gv).c_str());
+ }
+
+ // GlobalValue, even with InternalLinkage type, may have operands with
+ // ExternalLinkage type. Do not ignore these operands.
+ if (Constant* c = dyn_cast<Constant>(value)) {
+ // Handle ConstantExpr, ConstantStruct, ConstantArry etc..
+ for (unsigned i = 0, e = c->getNumOperands(); i != e; ++i)
+ findExternalRefs(c->getOperand(i), mangler);
+ }
+}
+
+
+uint32_t LTOModule::getSymbolCount()
+{
+ if ( !_symbolsParsed ) {
+ _symbolsParsed = true;
+
+ // Use mangler to add GlobalPrefix to names to match linker names.
+ Mangler mangler(*_module, _target->getTargetAsmInfo()->getGlobalPrefix());
+
+ // add functions
+ for (Module::iterator f = _module->begin(); f != _module->end(); ++f) {
+ if ( f->isDeclaration() ) {
+ addUndefinedSymbol(mangler.getValueName(f).c_str());
+ }
+ else {
+ addDefinedSymbol(f, mangler, true);
+ // add external symbols referenced by this function.
+ for (Function::iterator b = f->begin(); b != f->end(); ++b) {
+ for (BasicBlock::iterator i = b->begin();
+ i != b->end(); ++i) {
+ for (unsigned count = 0, total = i->getNumOperands();
+ count != total; ++count) {
+ findExternalRefs(i->getOperand(count), mangler);
+ }
+ }
+ }
+ }
+ }
+
+ // add data
+ for (Module::global_iterator v = _module->global_begin(),
+ e = _module->global_end(); v != e; ++v) {
+ if ( v->isDeclaration() ) {
+ addUndefinedSymbol(mangler.getValueName(v).c_str());
+ }
+ else {
+ addDefinedSymbol(v, mangler, false);
+ // add external symbols referenced by this data
+ for (unsigned count = 0, total = v->getNumOperands();
+ count != total; ++count) {
+ findExternalRefs(v->getOperand(count), mangler);
+ }
+ }
+ }
+
+ // make symbols for all undefines
+ for (StringSet::iterator it=_undefines.begin();
+ it != _undefines.end(); ++it) {
+ // if this symbol also has a definition, then don't make an undefine
+ // because it is a tentative definition
+ if ( _defines.find(it->getKeyData(), it->getKeyData()+it->getKeyLength()) == _defines.end() ) {
+ NameAndAttributes info;
+ info.name = it->getKeyData();
+ info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+ _symbols.push_back(info);
+ }
+ }
+
+ }
+
+ return _symbols.size();
+}
+
+
+lto_symbol_attributes LTOModule::getSymbolAttributes(uint32_t index)
+{
+ if ( index < _symbols.size() )
+ return _symbols[index].attributes;
+ else
+ return lto_symbol_attributes(0);
+}
+
+const char* LTOModule::getSymbolName(uint32_t index)
+{
+ if ( index < _symbols.size() )
+ return _symbols[index].name;
+ else
+ return NULL;
+}
+
Added: llvm/trunk/tools/lto2/LTOModule.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lto2/LTOModule.h?rev=47621&view=auto
==============================================================================
--- llvm/trunk/tools/lto2/LTOModule.h (added)
+++ llvm/trunk/tools/lto2/LTOModule.h Tue Feb 26 14:26:43 2008
@@ -0,0 +1,83 @@
+//===-LTOModule.h - LLVM Link Time Optimizer ------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the LTOModule class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LTO_MODULE_H
+#define LTO_MODULE_H
+
+#include "llvm/Module.h"
+#include "llvm/GlobalValue.h"
+#include "llvm/Constants.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/ADT/StringMap.h"
+
+#include "llvm-c/lto.h"
+
+#include <vector>
+
+
+//
+// C++ class which implements the opaque lto_module_t
+//
+class LTOModule {
+public:
+
+ static bool isBitcodeFile(const void* mem, size_t length);
+ static bool isBitcodeFile(const char* path);
+
+ static bool isBitcodeFileForTarget(const void* mem,
+ size_t length, const char* triplePrefix);
+
+ static bool isBitcodeFileForTarget(const char* path,
+ const char* triplePrefix);
+
+ static LTOModule* makeLTOModule(const char* path, std::string& errMsg);
+ static LTOModule* makeLTOModule(const void* mem, size_t length,
+ std::string& errMsg);
+ ~LTOModule();
+
+ const char* getTargetTriple();
+ uint32_t getSymbolCount();
+ lto_symbol_attributes getSymbolAttributes(uint32_t index);
+ const char* getSymbolName(uint32_t index);
+
+ llvm::Module * getLLVVMModule() { return _module; }
+ bool targetSupported() { return (_target != NULL); }
+
+private:
+ LTOModule(llvm::Module* m, llvm::TargetMachine* t);
+
+ void addDefinedSymbol(llvm::GlobalValue* def,
+ llvm::Mangler& mangler,
+ bool isFunction);
+ void addUndefinedSymbol(const char* name);
+ void findExternalRefs(llvm::Value* value,
+ llvm::Mangler& mangler);
+
+ typedef llvm::StringMap<uint8_t> StringSet;
+
+ struct NameAndAttributes {
+ const char* name;
+ lto_symbol_attributes attributes;
+ };
+
+ llvm::Module * _module;
+ llvm::TargetMachine * _target;
+ bool _symbolsParsed;
+ std::vector<NameAndAttributes> _symbols;
+ StringSet _defines; // only needed to disambiguate tentative definitions
+ StringSet _undefines; // only needed to disambiguate tentative definitions
+};
+
+#endif // LTO_MODULE_H
+
Added: llvm/trunk/tools/lto2/Makefile
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lto2/Makefile?rev=47621&view=auto
==============================================================================
--- llvm/trunk/tools/lto2/Makefile (added)
+++ llvm/trunk/tools/lto2/Makefile Tue Feb 26 14:26:43 2008
@@ -0,0 +1,45 @@
+##===- tools/lto2/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 = LTO
+
+# Include this here so we can get the configuration of the targets
+# that have been configured for construction. We have to do this
+# early so we can set up LINK_COMPONENTS before includeing Makefile.rules
+include $(LEVEL)/Makefile.config
+
+LINK_LIBS_IN_SHARED = 1
+ifeq ($(OS),Darwin)
+ SHARED_LIBRARY = 1
+ DONT_BUILD_RELINKED = 1
+else
+ BUILD_ARCHIVE = 1
+endif
+
+LINK_COMPONENTS := $(TARGETS_TO_BUILD) ipo scalaropts linker bitreader bitwriter
+
+include $(LEVEL)/Makefile.common
+
+ifeq ($(OS),Darwin)
+ # set dylib internal version number to llvmCore submission number
+ ifdef LLVM_SUBMIT_VERSION
+ LLVMLibsOptions := $(LLVMLibsOptions) -Wl,-current_version \
+ -Wl,$(LLVM_SUBMIT_VERSION).$(LLVM_SUBMIT_SUBVERSION)
+ endif
+ # extra options to override libtool defaults
+ LLVMLibsOptions := $(LLVMLibsOptions) \
+ -no-undefined -avoid-version \
+ -Wl,-exported_symbols_list -Wl,lto.exports \
+ -Wl,-dead_strip \
+ -Wl,-install_name \
+ -Wl,"@executable_path/../lib/lib$(LIBRARYNAME)$(SHLIBEXT)" \
+ -Wl,-seg1addr -Wl,0xE0000000
+
+endif
Added: llvm/trunk/tools/lto2/lto.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lto2/lto.cpp?rev=47621&view=auto
==============================================================================
--- llvm/trunk/tools/lto2/lto.cpp (added)
+++ llvm/trunk/tools/lto2/lto.cpp Tue Feb 26 14:26:43 2008
@@ -0,0 +1,240 @@
+//===-lto.cpp - LLVM Link Time Optimizer ----------------------------------===//
+//
+// 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 Link Time Optimization library. This library is
+// intended to be used by linker to optimize code at link time.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm-c/lto.h"
+
+#include "LTOModule.h"
+#include "LTOCodeGenerator.h"
+
+
+// holds most recent error string
+// *** not thread safe ***
+static std::string sLastErrorString;
+
+
+
+//
+// returns a printable string
+//
+extern const char* lto_get_version()
+{
+ return LTOCodeGenerator::getVersionString();
+}
+
+//
+// returns the last error string or NULL if last operation was sucessful
+//
+const char* lto_get_error_message()
+{
+ return sLastErrorString.c_str();
+}
+
+
+
+//
+// validates if a file is a loadable object file
+//
+bool lto_module_is_object_file(const char* path)
+{
+ return LTOModule::isBitcodeFile(path);
+}
+
+
+//
+// validates if a file is a loadable object file compilable for requested target
+//
+bool lto_module_is_object_file_for_target(const char* path,
+ const char* target_triplet_prefix)
+{
+ return LTOModule::isBitcodeFileForTarget(path, target_triplet_prefix);
+}
+
+
+//
+// validates if a buffer is a loadable object file
+//
+bool lto_module_is_object_file_in_memory(const void* mem, size_t length)
+{
+ return LTOModule::isBitcodeFile(mem, length);
+}
+
+
+//
+// validates if a buffer is a loadable object file compilable for the target
+//
+bool lto_module_is_object_file_in_memory_for_target(const void* mem,
+ size_t length, const char* target_triplet_prefix)
+{
+ return LTOModule::isBitcodeFileForTarget(mem, length, target_triplet_prefix);
+}
+
+
+
+//
+// loads an object file from disk
+// returns NULL on error (check lto_get_error_message() for details)
+//
+lto_module_t lto_module_create(const char* path)
+{
+ return LTOModule::makeLTOModule(path, sLastErrorString);
+}
+
+
+//
+// loads an object file from memory
+// returns NULL on error (check lto_get_error_message() for details)
+//
+lto_module_t lto_module_create_from_memory(const void* mem, size_t length)
+{
+ return LTOModule::makeLTOModule(mem, length, sLastErrorString);
+}
+
+
+//
+// frees all memory for a module
+// upon return the lto_module_t is no longer valid
+//
+void lto_module_dispose(lto_module_t mod)
+{
+ delete mod;
+}
+
+
+//
+// returns triplet string which the object module was compiled under
+//
+const char* lto_module_get_target_triple(lto_module_t mod)
+{
+ return mod->getTargetTriple();
+}
+
+
+//
+// returns the number of symbols in the object module
+//
+uint32_t lto_module_get_num_symbols(lto_module_t mod)
+{
+ return mod->getSymbolCount();
+}
+
+//
+// returns the name of the ith symbol in the object module
+//
+const char* lto_module_get_symbol_name(lto_module_t mod, uint32_t index)
+{
+ return mod->getSymbolName(index);
+}
+
+
+//
+// returns the attributes of the ith symbol in the object module
+//
+lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
+ uint32_t index)
+{
+ return mod->getSymbolAttributes(index);
+}
+
+
+
+
+
+//
+// instantiates a code generator
+// returns NULL if there is an error
+//
+lto_code_gen_t lto_codegen_create()
+{
+ return new LTOCodeGenerator();
+}
+
+
+
+//
+// frees all memory for a code generator
+// upon return the lto_code_gen_t is no longer valid
+//
+void lto_codegen_dispose(lto_code_gen_t cg)
+{
+ delete cg;
+}
+
+
+
+//
+// add an object module to the set of modules for which code will be generated
+// returns true on error (check lto_get_error_message() for details)
+//
+bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod)
+{
+ return cg->addModule(mod, sLastErrorString);
+}
+
+
+//
+// sets what if any format of debug info should be generated
+// returns true on error (check lto_get_error_message() for details)
+//
+bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug)
+{
+ return cg->setDebugInfo(debug, sLastErrorString);
+}
+
+
+//
+// sets what code model to generated
+// returns true on error (check lto_get_error_message() for details)
+//
+bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model)
+{
+ return cg->setCodePICModel(model, sLastErrorString);
+}
+
+//
+// adds to a list of all global symbols that must exist in the final
+// generated code. If a function is not listed there, it might be
+// inlined into every usage and optimized away.
+//
+void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg, const char* symbol)
+{
+ cg->addMustPreserveSymbol(symbol);
+}
+
+
+//
+// writes a new file at the specified path that contains the
+// merged contents of all modules added so far.
+// returns true on error (check lto_get_error_message() for details)
+//
+bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char* path)
+{
+ return cg->writeMergedModules(path, sLastErrorString);
+}
+
+
+//
+// generates code for all added modules into one object file
+// On sucess returns a pointer to a generated mach-o buffer and
+// length set to the buffer size. Client must free() the buffer
+// when done.
+// On failure, returns NULL (check lto_get_error_message() for details)
+//
+extern void*
+lto_codegen_compile(lto_code_gen_t cg, size_t* length)
+{
+ return cg->compile(length, sLastErrorString);
+}
+
+
+
Added: llvm/trunk/tools/lto2/lto.exports
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lto2/lto.exports?rev=47621&view=auto
==============================================================================
--- llvm/trunk/tools/lto2/lto.exports (added)
+++ llvm/trunk/tools/lto2/lto.exports Tue Feb 26 14:26:43 2008
@@ -0,0 +1,22 @@
+_lto_get_error_message
+_lto_get_version
+_lto_module_create
+_lto_module_create_from_memory
+_lto_module_get_num_symbols
+_lto_module_get_symbol_attribute
+_lto_module_get_symbol_name
+_lto_module_get_target_triple
+_lto_module_is_object_file
+_lto_module_is_object_file_for_target
+_lto_module_is_object_file_in_memory
+_lto_module_is_object_file_in_memory_for_target
+_lto_module_dispose
+_lto_codegen_add_module
+_lto_codegen_add_must_preserve_symbol
+_lto_codegen_compile
+_lto_codegen_create
+_lto_codegen_dispose
+_lto_codegen_set_debug_model
+_lto_codegen_set_pic_model
+_lto_codegen_write_merged_modules
+
More information about the llvm-commits
mailing list