[llvm] r345377 - [Codegen] - Implement basic .debug_loclists section emission (DWARF5).
George Rimar via llvm-commits
llvm-commits at lists.llvm.org
Fri Oct 26 04:25:13 PDT 2018
Author: grimar
Date: Fri Oct 26 04:25:12 2018
New Revision: 345377
URL: http://llvm.org/viewvc/llvm-project?rev=345377&view=rev
Log:
[Codegen] - Implement basic .debug_loclists section emission (DWARF5).
.debug_loclists is the DWARF 5 version of the .debug_loc.
With that patch, it will be emitted when DWARF 5 is used.
Differential revision: https://reviews.llvm.org/D53365
Added:
llvm/trunk/test/CodeGen/X86/debug-loclists.ll
Modified:
llvm/trunk/include/llvm/MC/MCObjectFileInfo.h
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfFile.h
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.h
llvm/trunk/lib/MC/MCObjectFileInfo.cpp
Modified: llvm/trunk/include/llvm/MC/MCObjectFileInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/MC/MCObjectFileInfo.h?rev=345377&r1=345376&r2=345377&view=diff
==============================================================================
--- llvm/trunk/include/llvm/MC/MCObjectFileInfo.h (original)
+++ llvm/trunk/include/llvm/MC/MCObjectFileInfo.h Fri Oct 26 04:25:12 2018
@@ -117,6 +117,8 @@ protected:
MCSection *DwarfAddrSection;
/// The DWARF v5 range list section.
MCSection *DwarfRnglistsSection;
+ /// The DWARF v5 locations list section.
+ MCSection *DwarfLoclistsSection;
/// The DWARF v5 range list section for fission.
MCSection *DwarfRnglistsDWOSection;
@@ -258,6 +260,7 @@ public:
MCSection *getDwarfARangesSection() const { return DwarfARangesSection; }
MCSection *getDwarfRangesSection() const { return DwarfRangesSection; }
MCSection *getDwarfRnglistsSection() const { return DwarfRnglistsSection; }
+ MCSection *getDwarfLoclistsSection() const { return DwarfLoclistsSection; }
MCSection *getDwarfMacinfoSection() const { return DwarfMacinfoSection; }
MCSection *getDwarfDebugNamesSection() const {
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp?rev=345377&r1=345376&r2=345377&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp Fri Oct 26 04:25:12 2018
@@ -727,11 +727,16 @@ void DwarfDebug::beginModule() {
(useSplitDwarf() ? SkeletonHolder : InfoHolder)
.setStringOffsetsStartSym(Asm->createTempSymbol("str_offsets_base"));
- // Create the symbol that designates the start of the DWARF v5 range list
- // table. It is located past the header and before the offsets table.
+
+ // Create the symbols that designates the start of the DWARF v5 range list
+ // and locations list tables. They are located past the table headers.
if (getDwarfVersion() >= 5) {
- (useSplitDwarf() ? SkeletonHolder : InfoHolder)
- .setRnglistsTableBaseSym(Asm->createTempSymbol("rnglists_table_base"));
+ DwarfFile &Holder = useSplitDwarf() ? SkeletonHolder : InfoHolder;
+ Holder.setRnglistsTableBaseSym(
+ Asm->createTempSymbol("rnglists_table_base"));
+ Holder.setLoclistsTableBaseSym(
+ Asm->createTempSymbol("loclists_table_base"));
+
if (useSplitDwarf())
InfoHolder.setRnglistsTableBaseSym(
Asm->createTempSymbol("rnglists_dwo_table_base"));
@@ -889,8 +894,13 @@ void DwarfDebug::finalizeModuleInfo() {
U.attachRangesOrLowHighPC(U.getUnitDie(), TheCU.takeRanges());
}
- if (getDwarfVersion() >= 5 && U.hasRangeLists())
- U.addRnglistsBase();
+ if (getDwarfVersion() >= 5) {
+ if (U.hasRangeLists())
+ U.addRnglistsBase();
+
+ if (!DebugLocs.getLists().empty() && !useSplitDwarf())
+ U.addLoclistsBase();
+ }
auto *CUNode = cast<DICompileUnit>(P.first);
// If compile Unit has macros, emit "DW_AT_macro_info" attribute.
@@ -1925,25 +1935,119 @@ void DwarfDebug::emitDebugLocEntryLocati
emitDebugLocEntry(Streamer, Entry);
}
-// Emit locations into the debug loc section.
+// Emit the common part of the DWARF 5 range/locations list tables header.
+static void emitListsTableHeaderStart(AsmPrinter *Asm, const DwarfFile &Holder,
+ MCSymbol *TableStart,
+ MCSymbol *TableEnd) {
+ // Build the table header, which starts with the length field.
+ Asm->OutStreamer->AddComment("Length");
+ Asm->EmitLabelDifference(TableEnd, TableStart, 4);
+ Asm->OutStreamer->EmitLabel(TableStart);
+ // Version number (DWARF v5 and later).
+ Asm->OutStreamer->AddComment("Version");
+ Asm->emitInt16(Asm->OutStreamer->getContext().getDwarfVersion());
+ // Address size.
+ Asm->OutStreamer->AddComment("Address size");
+ Asm->emitInt8(Asm->MAI->getCodePointerSize());
+ // Segment selector size.
+ Asm->OutStreamer->AddComment("Segment selector size");
+ Asm->emitInt8(0);
+}
+
+// Emit the header of a DWARF 5 range list table list table. Returns the symbol
+// that designates the end of the table for the caller to emit when the table is
+// complete.
+static MCSymbol *emitRnglistsTableHeader(AsmPrinter *Asm,
+ const DwarfFile &Holder) {
+ MCSymbol *TableStart = Asm->createTempSymbol("debug_rnglist_table_start");
+ MCSymbol *TableEnd = Asm->createTempSymbol("debug_rnglist_table_end");
+ emitListsTableHeaderStart(Asm, Holder, TableStart, TableEnd);
+
+ Asm->OutStreamer->AddComment("Offset entry count");
+ Asm->emitInt32(Holder.getRangeLists().size());
+ Asm->OutStreamer->EmitLabel(Holder.getRnglistsTableBaseSym());
+
+ for (const RangeSpanList &List : Holder.getRangeLists())
+ Asm->EmitLabelDifference(List.getSym(), Holder.getRnglistsTableBaseSym(),
+ 4);
+
+ return TableEnd;
+}
+
+// Emit the header of a DWARF 5 locations list table. Returns the symbol that
+// designates the end of the table for the caller to emit when the table is
+// complete.
+static MCSymbol *emitLoclistsTableHeader(AsmPrinter *Asm,
+ const DwarfFile &Holder) {
+ MCSymbol *TableStart = Asm->createTempSymbol("debug_loclist_table_start");
+ MCSymbol *TableEnd = Asm->createTempSymbol("debug_loclist_table_end");
+ emitListsTableHeaderStart(Asm, Holder, TableStart, TableEnd);
+
+ // FIXME: Generate the offsets table and use DW_FORM_loclistx with the
+ // DW_AT_loclists_base attribute. Until then set the number of offsets to 0.
+ Asm->OutStreamer->AddComment("Offset entry count");
+ Asm->emitInt32(0);
+ Asm->OutStreamer->EmitLabel(Holder.getLoclistsTableBaseSym());
+
+ return TableEnd;
+}
+
+// Emit locations into the .debug_loc/.debug_rnglists section.
void DwarfDebug::emitDebugLoc() {
if (DebugLocs.getLists().empty())
return;
- // Start the dwarf loc section.
- Asm->OutStreamer->SwitchSection(
- Asm->getObjFileLowering().getDwarfLocSection());
+ bool IsLocLists = getDwarfVersion() >= 5;
+ MCSymbol *TableEnd = nullptr;
+ if (IsLocLists) {
+ Asm->OutStreamer->SwitchSection(
+ Asm->getObjFileLowering().getDwarfLoclistsSection());
+ TableEnd = emitLoclistsTableHeader(Asm, useSplitDwarf() ? SkeletonHolder
+ : InfoHolder);
+ } else {
+ Asm->OutStreamer->SwitchSection(
+ Asm->getObjFileLowering().getDwarfLocSection());
+ }
+
unsigned char Size = Asm->MAI->getCodePointerSize();
for (const auto &List : DebugLocs.getLists()) {
Asm->OutStreamer->EmitLabel(List.Label);
+
const DwarfCompileUnit *CU = List.CU;
+ const MCSymbol *Base = CU->getBaseAddress();
for (const auto &Entry : DebugLocs.getEntries(List)) {
- // Set up the range. This range is relative to the entry point of the
- // compile unit. This is a hard coded 0 for low_pc when we're emitting
- // ranges, or the DW_AT_low_pc on the compile unit otherwise.
- if (auto *Base = CU->getBaseAddress()) {
- Asm->EmitLabelDifference(Entry.BeginSym, Base, Size);
- Asm->EmitLabelDifference(Entry.EndSym, Base, Size);
+ if (Base) {
+ // Set up the range. This range is relative to the entry point of the
+ // compile unit. This is a hard coded 0 for low_pc when we're emitting
+ // ranges, or the DW_AT_low_pc on the compile unit otherwise.
+ if (IsLocLists) {
+ Asm->OutStreamer->AddComment("DW_LLE_offset_pair");
+ Asm->OutStreamer->EmitIntValue(dwarf::DW_LLE_offset_pair, 1);
+ Asm->OutStreamer->AddComment(" starting offset");
+ Asm->EmitLabelDifferenceAsULEB128(Entry.BeginSym, Base);
+ Asm->OutStreamer->AddComment(" ending offset");
+ Asm->EmitLabelDifferenceAsULEB128(Entry.EndSym, Base);
+ } else {
+ Asm->EmitLabelDifference(Entry.BeginSym, Base, Size);
+ Asm->EmitLabelDifference(Entry.EndSym, Base, Size);
+ }
+
+ emitDebugLocEntryLocation(Entry);
+ continue;
+ }
+
+ // We have no base address.
+ if (IsLocLists) {
+ // TODO: Use DW_LLE_base_addressx + DW_LLE_offset_pair, or
+ // DW_LLE_startx_length in case if there is only a single range.
+ // That should reduce the size of the debug data emited.
+ // For now just use the DW_LLE_startx_length for all cases.
+ Asm->OutStreamer->AddComment("DW_LLE_startx_length");
+ Asm->emitInt8(dwarf::DW_LLE_startx_length);
+ Asm->OutStreamer->AddComment(" start idx");
+ Asm->EmitULEB128(AddrPool.getIndex(Entry.BeginSym));
+ Asm->OutStreamer->AddComment(" length");
+ Asm->EmitLabelDifferenceAsULEB128(Entry.EndSym, Entry.BeginSym);
} else {
Asm->OutStreamer->EmitSymbolValue(Entry.BeginSym, Size);
Asm->OutStreamer->EmitSymbolValue(Entry.EndSym, Size);
@@ -1951,9 +2055,20 @@ void DwarfDebug::emitDebugLoc() {
emitDebugLocEntryLocation(Entry);
}
- Asm->OutStreamer->EmitIntValue(0, Size);
- Asm->OutStreamer->EmitIntValue(0, Size);
+
+ if (IsLocLists) {
+ // .debug_loclists section ends with DW_LLE_end_of_list.
+ Asm->OutStreamer->AddComment("DW_LLE_end_of_list");
+ Asm->OutStreamer->EmitIntValue(dwarf::DW_LLE_end_of_list, 1);
+ } else {
+ // Terminate the .debug_loc list with two 0 values.
+ Asm->OutStreamer->EmitIntValue(0, Size);
+ Asm->OutStreamer->EmitIntValue(0, Size);
+ }
}
+
+ if (TableEnd)
+ Asm->OutStreamer->EmitLabel(TableEnd);
}
void DwarfDebug::emitDebugLocDWO() {
@@ -2232,39 +2347,6 @@ static void emitRangeList(DwarfDebug &DD
}
}
-// Emit the header of a DWARF 5 range list table. Returns the symbol that
-// designates the end of the table for the caller to emit when the table is
-// complete.
-static MCSymbol *emitRnglistsTableHeader(AsmPrinter *Asm,
- const DwarfFile &Holder) {
- // The length is described by a starting label right after the length field
- // and an end label.
- MCSymbol *TableStart = Asm->createTempSymbol("debug_rnglist_table_start");
- MCSymbol *TableEnd = Asm->createTempSymbol("debug_rnglist_table_end");
- // Build the range table header, which starts with the length field.
- Asm->OutStreamer->AddComment("Length");
- Asm->EmitLabelDifference(TableEnd, TableStart, 4);
- Asm->OutStreamer->EmitLabel(TableStart);
- // Version number (DWARF v5 and later).
- Asm->OutStreamer->AddComment("Version");
- Asm->emitInt16(Asm->OutStreamer->getContext().getDwarfVersion());
- Asm->OutStreamer->AddComment("Address size");
- Asm->emitInt8(Asm->MAI->getCodePointerSize());
- Asm->OutStreamer->AddComment("Segment selector size");
- Asm->emitInt8(0);
-
- MCSymbol *RnglistsTableBaseSym = Holder.getRnglistsTableBaseSym();
-
- // FIXME: Generate the offsets table and use DW_FORM_rnglistx with the
- // DW_AT_ranges attribute. Until then set the number of offsets to 0.
- Asm->OutStreamer->AddComment("Offset entry count");
- Asm->emitInt32(Holder.getRangeLists().size());
- Asm->OutStreamer->EmitLabel(RnglistsTableBaseSym);
- for (const RangeSpanList &List : Holder.getRangeLists())
- Asm->EmitLabelDifference(List.getSym(), RnglistsTableBaseSym, 4);
- return TableEnd;
-}
-
void emitDebugRangesImpl(DwarfDebug &DD, AsmPrinter *Asm,
const DwarfFile &Holder, MCSymbol *TableEnd) {
for (const RangeSpanList &List : Holder.getRangeLists())
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfFile.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfFile.h?rev=345377&r1=345376&r2=345377&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfFile.h (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfFile.h Fri Oct 26 04:25:12 2018
@@ -89,6 +89,10 @@ class DwarfFile {
/// The table is shared by all units.
MCSymbol *RnglistsTableBaseSym = nullptr;
+ /// DWARF v5: The symbol that designates the base of the locations list table.
+ /// The table is shared by all units.
+ MCSymbol *LoclistsTableBaseSym = nullptr;
+
/// The variables of a lexical scope.
struct ScopeVars {
/// We need to sort Args by ArgNo and check for duplicates. This could also
@@ -161,13 +165,14 @@ public:
DwarfStringPool &getStringPool() { return StrPool; }
MCSymbol *getStringOffsetsStartSym() const { return StringOffsetsStartSym; }
-
void setStringOffsetsStartSym(MCSymbol *Sym) { StringOffsetsStartSym = Sym; }
MCSymbol *getRnglistsTableBaseSym() const { return RnglistsTableBaseSym; }
-
void setRnglistsTableBaseSym(MCSymbol *Sym) { RnglistsTableBaseSym = Sym; }
+ MCSymbol *getLoclistsTableBaseSym() const { return LoclistsTableBaseSym; }
+ void setLoclistsTableBaseSym(MCSymbol *Sym) { LoclistsTableBaseSym = Sym; }
+
/// \returns false if the variable was merged with a previous one.
bool addScopeVariable(LexicalScope *LS, DbgVariable *Var);
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.cpp?rev=345377&r1=345376&r2=345377&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.cpp Fri Oct 26 04:25:12 2018
@@ -1656,6 +1656,15 @@ void DwarfUnit::addRnglistsBase() {
TLOF.getDwarfRnglistsSection()->getBeginSymbol());
}
+void DwarfUnit::addLoclistsBase() {
+ assert(DD->getDwarfVersion() >= 5 &&
+ "DW_AT_loclists_base requires DWARF version 5 or later");
+ const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
+ addSectionLabel(getUnitDie(), dwarf::DW_AT_loclists_base,
+ DU->getLoclistsTableBaseSym(),
+ TLOF.getDwarfLoclistsSection()->getBeginSymbol());
+}
+
void DwarfUnit::addAddrTableBase() {
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
MCSymbol *Label = DD->getAddressPool().getLabel();
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.h?rev=345377&r1=345376&r2=345377&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.h (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.h Fri Oct 26 04:25:12 2018
@@ -272,6 +272,9 @@ public:
/// Add the DW_AT_rnglists_base attribute to the unit DIE.
void addRnglistsBase();
+ /// Add the DW_AT_loclists_base attribute to the unit DIE.
+ void addLoclistsBase();
+
/// Add the DW_AT_addr_base attribute to the unit DIE.
void addAddrTableBase();
Modified: llvm/trunk/lib/MC/MCObjectFileInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCObjectFileInfo.cpp?rev=345377&r1=345376&r2=345377&view=diff
==============================================================================
--- llvm/trunk/lib/MC/MCObjectFileInfo.cpp (original)
+++ llvm/trunk/lib/MC/MCObjectFileInfo.cpp Fri Oct 26 04:25:12 2018
@@ -260,6 +260,10 @@ void MCObjectFileInfo::initMachOMCObject
DwarfLocSection =
Ctx->getMachOSection("__DWARF", "__debug_loc", MachO::S_ATTR_DEBUG,
SectionKind::getMetadata(), "section_debug_loc");
+ DwarfLoclistsSection =
+ Ctx->getMachOSection("__DWARF", "__debug_loclists", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "section_debug_loc");
+
DwarfARangesSection =
Ctx->getMachOSection("__DWARF", "__debug_aranges", MachO::S_ATTR_DEBUG,
SectionKind::getMetadata());
@@ -435,6 +439,7 @@ void MCObjectFileInfo::initELFMCObjectFi
Ctx->getELFSection(".debug_str_offsets", DebugSecType, 0);
DwarfAddrSection = Ctx->getELFSection(".debug_addr", DebugSecType, 0);
DwarfRnglistsSection = Ctx->getELFSection(".debug_rnglists", DebugSecType, 0);
+ DwarfLoclistsSection = Ctx->getELFSection(".debug_loclists", DebugSecType, 0);
// Fission Sections
DwarfInfoDWOSection =
Added: llvm/trunk/test/CodeGen/X86/debug-loclists.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/debug-loclists.ll?rev=345377&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/debug-loclists.ll (added)
+++ llvm/trunk/test/CodeGen/X86/debug-loclists.ll Fri Oct 26 04:25:12 2018
@@ -0,0 +1,142 @@
+; RUN: llc -mtriple=x86_64-pc-linux -filetype=obj -o %t < %s
+; RUN: llvm-dwarfdump -v %t | FileCheck %s
+
+; CHECK: 0x00000033: DW_TAG_formal_parameter [3]
+; CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x0000000c
+; CHECK-NEXT: [0x0000000000000000, 0x0000000000000004): DW_OP_breg5 RDI+0
+; CHECK-NEXT: [0x0000000000000004, 0x0000000000000012): DW_OP_breg3 RBX+0)
+; CHECK-NEXT: DW_AT_name [DW_FORM_strx1] ( indexed (0000000e) string = "a")
+; CHECK-NEXT: DW_AT_decl_file [DW_FORM_data1] ("/home/folder{{\\|\/}}test.cc")
+; CHECK-NEXT: DW_AT_decl_line [DW_FORM_data1] (6)
+; CHECK-NEXT: DW_AT_type [DW_FORM_ref4] (cu + 0x0040 => {0x00000040} "A")
+
+; CHECK: .debug_loclists contents:
+; CHECK-NEXT: 0x00000000: locations list header: length = 0x00000017, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
+; CHECK-NEXT: 0x00000000:
+; CHECK-NEXT: [0x0000000000000000, 0x0000000000000004): DW_OP_breg5 RDI+0
+; CHECK-NEXT: [0x0000000000000004, 0x0000000000000012): DW_OP_breg3 RBX+0
+
+; There is no way to use llvm-dwarfdump atm (2018, october) to verify the DW_LLE_* codes emited,
+; because dumper is not yet implements that. Use asm code to do this check instead.
+;
+; RUN: llc -mtriple=x86_64-pc-linux -filetype=asm < %s -o - | FileCheck %s --check-prefix=ASM
+; ASM: .section .debug_loclists,"", at progbits
+; ASM-NEXT: .long .Ldebug_loclist_table_end0-.Ldebug_loclist_table_start0 # Length
+; ASM-NEXT: .Ldebug_loclist_table_start0:
+; ASM-NEXT: .short 5 # Version
+; ASM-NEXT: .byte 8 # Address size
+; ASM-NEXT: .byte 0 # Segment selector size
+; ASM-NEXT: .long 0 # Offset entry count
+; ASM-NEXT: .Lloclists_table_base0:
+; ASM-NEXT: .Ldebug_loc0:
+; ASM-NEXT: .byte 4 # DW_LLE_offset_pair
+; ASM-NEXT: .uleb128 .Lfunc_begin0-.Lfunc_begin0 # starting offset
+; ASM-NEXT: .uleb128 .Ltmp0-.Lfunc_begin0 # ending offset
+; ASM-NEXT: .short 2 # Loc expr size
+; ASM-NEXT: .byte 117 # DW_OP_breg5
+; ASM-NEXT: .byte 0 # 0
+; ASM-NEXT: .byte 4 # DW_LLE_offset_pair
+; ASM-NEXT: .uleb128 .Ltmp0-.Lfunc_begin0 # starting offset
+; ASM-NEXT: .uleb128 .Ltmp1-.Lfunc_begin0 # ending offset
+; ASM-NEXT: .short 2 # Loc expr size
+; ASM-NEXT: .byte 115 # DW_OP_breg3
+; ASM-NEXT: .byte 0 # 0
+; ASM-NEXT: .byte 0 # DW_LLE_end_of_list
+; ASM-NEXT: .Ldebug_loclist_table_end0:
+
+; ModuleID = 'test.cc'
+source_filename = "test.cc"
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%struct.A = type { i32 (...)** }
+
+ at _ZTV1A = dso_local unnamed_addr constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast (void (%struct.A*)* @_ZN1A3fooEv to i8*), i8* bitcast (void (%struct.A*)* @_ZN1A3barEv to i8*)] }, align 8
+ at _ZTVN10__cxxabiv117__class_type_infoE = external dso_local global i8*
+ at _ZTS1A = dso_local constant [3 x i8] c"1A\00", align 1
+ at _ZTI1A = dso_local constant { i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv117__class_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @_ZTS1A, i32 0, i32 0) }, align 8
+
+; Function Attrs: noinline optnone uwtable
+define dso_local void @_Z3baz1A(%struct.A* %a) #0 !dbg !7 {
+entry:
+ call void @llvm.dbg.declare(metadata %struct.A* %a, metadata !23, metadata !DIExpression()), !dbg !24
+ call void @_ZN1A3fooEv(%struct.A* %a), !dbg !25
+ call void @_ZN1A3barEv(%struct.A* %a), !dbg !26
+ ret void, !dbg !27
+}
+
+; Function Attrs: nounwind readnone speculatable
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+; Function Attrs: noinline nounwind optnone uwtable
+define dso_local void @_ZN1A3fooEv(%struct.A* %this) unnamed_addr #2 align 2 !dbg !28 {
+entry:
+ %this.addr = alloca %struct.A*, align 8
+ store %struct.A* %this, %struct.A** %this.addr, align 8
+ call void @llvm.dbg.declare(metadata %struct.A** %this.addr, metadata !29, metadata !DIExpression()), !dbg !31
+ %this1 = load %struct.A*, %struct.A** %this.addr, align 8
+ ret void, !dbg !32
+}
+
+; Function Attrs: noinline nounwind optnone uwtable
+define dso_local void @_ZN1A3barEv(%struct.A* %this) unnamed_addr #2 align 2 !dbg !33 {
+entry:
+ %this.addr = alloca %struct.A*, align 8
+ store %struct.A* %this, %struct.A** %this.addr, align 8
+ call void @llvm.dbg.declare(metadata %struct.A** %this.addr, metadata !34, metadata !DIExpression()), !dbg !35
+ %this1 = load %struct.A*, %struct.A** %this.addr, align 8
+ ret void, !dbg !36
+}
+
+; Function Attrs: noinline norecurse nounwind optnone uwtable
+define dso_local i32 @main() #3 !dbg !37 {
+entry:
+ %retval = alloca i32, align 4
+ store i32 0, i32* %retval, align 4
+ ret i32 0, !dbg !38
+}
+
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3, !4, !5}
+!llvm.ident = !{!6}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 8.0.0 (trunk 344035)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
+!1 = !DIFile(filename: "test.cc", directory: "/home/folder", checksumkind: CSK_MD5, checksum: "e0f357ad6dcb791a774a0dae55baf5e7")
+!2 = !{}
+!3 = !{i32 2, !"Dwarf Version", i32 5}
+!4 = !{i32 2, !"Debug Info Version", i32 3}
+!5 = !{i32 1, !"wchar_size", i32 4}
+!6 = !{!"clang version 8.0.0 (trunk 344035)"}
+!7 = distinct !DISubprogram(name: "baz", linkageName: "_Z3baz1A", scope: !1, file: !1, line: 6, type: !8, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
+!8 = !DISubroutineType(types: !9)
+!9 = !{null, !10}
+!10 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "A", file: !1, line: 1, size: 64, flags: DIFlagTypePassByReference, elements: !11, vtableHolder: !10, identifier: "_ZTS1A")
+!11 = !{!12, !18, !22}
+!12 = !DIDerivedType(tag: DW_TAG_member, name: "_vptr$A", scope: !1, file: !1, baseType: !13, size: 64, flags: DIFlagArtificial)
+!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64)
+!14 = !DIDerivedType(tag: DW_TAG_pointer_type, name: "__vtbl_ptr_type", baseType: !15, size: 64)
+!15 = !DISubroutineType(types: !16)
+!16 = !{!17}
+!17 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!18 = !DISubprogram(name: "foo", linkageName: "_ZN1A3fooEv", scope: !10, file: !1, line: 2, type: !19, isLocal: false, isDefinition: false, scopeLine: 2, containingType: !10, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 0, flags: DIFlagPrototyped, isOptimized: false)
+!19 = !DISubroutineType(types: !20)
+!20 = !{null, !21}
+!21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
+!22 = !DISubprogram(name: "bar", linkageName: "_ZN1A3barEv", scope: !10, file: !1, line: 3, type: !19, isLocal: false, isDefinition: false, scopeLine: 3, containingType: !10, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 1, flags: DIFlagPrototyped, isOptimized: false)
+!23 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 6, type: !10)
+!24 = !DILocation(line: 6, column: 19, scope: !7)
+!25 = !DILocation(line: 7, column: 6, scope: !7)
+!26 = !DILocation(line: 8, column: 6, scope: !7)
+!27 = !DILocation(line: 9, column: 1, scope: !7)
+!28 = distinct !DISubprogram(name: "foo", linkageName: "_ZN1A3fooEv", scope: !10, file: !1, line: 12, type: !19, isLocal: false, isDefinition: true, scopeLine: 12, flags: DIFlagPrototyped, isOptimized: false, unit: !0, declaration: !18, retainedNodes: !2)
+!29 = !DILocalVariable(name: "this", arg: 1, scope: !28, type: !30, flags: DIFlagArtificial | DIFlagObjectPointer)
+!30 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64)
+!31 = !DILocation(line: 0, scope: !28)
+!32 = !DILocation(line: 12, column: 16, scope: !28)
+!33 = distinct !DISubprogram(name: "bar", linkageName: "_ZN1A3barEv", scope: !10, file: !1, line: 13, type: !19, isLocal: false, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: false, unit: !0, declaration: !22, retainedNodes: !2)
+!34 = !DILocalVariable(name: "this", arg: 1, scope: !33, type: !30, flags: DIFlagArtificial | DIFlagObjectPointer)
+!35 = !DILocation(line: 0, scope: !33)
+!36 = !DILocation(line: 13, column: 16, scope: !33)
+!37 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 15, type: !15, isLocal: false, isDefinition: true, scopeLine: 15, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
+!38 = !DILocation(line: 16, column: 3, scope: !37)
More information about the llvm-commits
mailing list