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Don't try to construct debug LexicalScopes hierarchy for functions that do not have top level debug information. 

If a function isn't actually in a CU's subprogram list in the debug info
metadata, ignore all the DebugLocs and don't try to build scopes, track
variables, etc.

While this is possibly a minor optimization, it's also a correctness fix
for an incoming patch that will add assertions to LexicalScopes and the
debug info verifier to ensure that all scope chains lead to debug info
for the current function.

Fix up a few test cases that had broken/incomplete debug info that could
violate this constraint.

Add a test case where this occurs by design (inlining a
debug-info-having function in an attribute nodebug function - we want
this to work because /if/ the nodebug function is then inlined into a
debug-info-having function, it should be fine (and will work fine - we
just stitch the scopes up as usual), but should the inlining not happen
we need to not assert fail either).

llvm-svn: 212203
This commit is contained in:
David Blaikie 2014-07-02 18:31:35 +00:00
parent a8c3509ffe
commit d47fb5b339
8 changed files with 210 additions and 42 deletions
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10
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -730,6 +730,8 @@ void DwarfDebug::beginModule() {
const Module *M = MMI->getModule(); const Module *M = MMI->getModule();
FunctionDIs = makeSubprogramMap(*M);
// If module has named metadata anchors then use them, otherwise scan the // If module has named metadata anchors then use them, otherwise scan the
// module using debug info finder to collect debug info. // module using debug info finder to collect debug info.
NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu"); NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
@ -1415,6 +1417,10 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
if (!MMI->hasDebugInfo()) if (!MMI->hasDebugInfo())
return; return;
auto DI = FunctionDIs.find(MF->getFunction());
if (DI == FunctionDIs.end())
return;
// Grab the lexical scopes for the function, if we don't have any of those // Grab the lexical scopes for the function, if we don't have any of those
// then we're not going to be able to do anything. // then we're not going to be able to do anything.
LScopes.initialize(*MF); LScopes.initialize(*MF);
@ -1430,6 +1436,7 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
// belongs to so that we add to the correct per-cu line table in the // belongs to so that we add to the correct per-cu line table in the
// non-asm case. // non-asm case.
LexicalScope *FnScope = LScopes.getCurrentFunctionScope(); LexicalScope *FnScope = LScopes.getCurrentFunctionScope();
assert(FnScope->getScopeNode() == DI->second);
DwarfCompileUnit *TheCU = SPMap.lookup(FnScope->getScopeNode()); DwarfCompileUnit *TheCU = SPMap.lookup(FnScope->getScopeNode());
assert(TheCU && "Unable to find compile unit!"); assert(TheCU && "Unable to find compile unit!");
if (Asm->OutStreamer.hasRawTextSupport()) if (Asm->OutStreamer.hasRawTextSupport())
@ -1527,7 +1534,8 @@ void DwarfDebug::endFunction(const MachineFunction *MF) {
assert(CurFn == MF); assert(CurFn == MF);
assert(CurFn != nullptr); assert(CurFn != nullptr);
if (!MMI->hasDebugInfo() || LScopes.empty()) { if (!MMI->hasDebugInfo() || LScopes.empty() ||
!FunctionDIs.count(MF->getFunction())) {
// If we don't have a lexical scope for this function then there will // If we don't have a lexical scope for this function then there will
// be a hole in the range information. Keep note of this by setting the // be a hole in the range information. Keep note of this by setting the
// previously used section to nullptr. // previously used section to nullptr.

2
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
View File

@ -330,6 +330,8 @@ class DwarfDebug : public AsmPrinterHandler {
DwarfAccelTable AccelNamespace; DwarfAccelTable AccelNamespace;
DwarfAccelTable AccelTypes; DwarfAccelTable AccelTypes;
DenseMap<const Function *, DISubprogram> FunctionDIs;
MCDwarfDwoLineTable *getDwoLineTable(const DwarfCompileUnit &); MCDwarfDwoLineTable *getDwoLineTable(const DwarfCompileUnit &);
void addScopeVariable(LexicalScope *LS, DbgVariable *Var); void addScopeVariable(LexicalScope *LS, DbgVariable *Var);

15
llvm/lib/CodeGen/LiveDebugVariables.cpp
View File

@ -329,12 +329,13 @@ class LDVImpl {
void computeIntervals(); void computeIntervals();
public: public:
LDVImpl(LiveDebugVariables *ps) : pass(*ps), EmitDone(false), LDVImpl(LiveDebugVariables *ps)
ModifiedMF(false) {} : pass(*ps), MF(nullptr), EmitDone(false), ModifiedMF(false) {}
bool runOnMachineFunction(MachineFunction &mf); bool runOnMachineFunction(MachineFunction &mf);
/// clear - Release all memory. /// clear - Release all memory.
void clear() { void clear() {
MF = nullptr;
userValues.clear(); userValues.clear();
virtRegToEqClass.clear(); virtRegToEqClass.clear();
userVarMap.clear(); userVarMap.clear();
@ -693,11 +694,11 @@ void LDVImpl::computeIntervals() {
} }
bool LDVImpl::runOnMachineFunction(MachineFunction &mf) { bool LDVImpl::runOnMachineFunction(MachineFunction &mf) {
clear();
MF = &mf; MF = &mf;
LIS = &pass.getAnalysis<LiveIntervals>(); LIS = &pass.getAnalysis<LiveIntervals>();
MDT = &pass.getAnalysis<MachineDominatorTree>(); MDT = &pass.getAnalysis<MachineDominatorTree>();
TRI = mf.getTarget().getRegisterInfo(); TRI = mf.getTarget().getRegisterInfo();
clear();
LS.initialize(mf); LS.initialize(mf);
DEBUG(dbgs() << "********** COMPUTING LIVE DEBUG VARIABLES: " DEBUG(dbgs() << "********** COMPUTING LIVE DEBUG VARIABLES: "
<< mf.getName() << " **********\n"); << mf.getName() << " **********\n");
@ -712,6 +713,8 @@ bool LDVImpl::runOnMachineFunction(MachineFunction &mf) {
bool LiveDebugVariables::runOnMachineFunction(MachineFunction &mf) { bool LiveDebugVariables::runOnMachineFunction(MachineFunction &mf) {
if (!EnableLDV) if (!EnableLDV)
return false; return false;
if (!FunctionDIs.count(mf.getFunction()))
return false;
if (!pImpl) if (!pImpl)
pImpl = new LDVImpl(this); pImpl = new LDVImpl(this);
return static_cast<LDVImpl*>(pImpl)->runOnMachineFunction(mf); return static_cast<LDVImpl*>(pImpl)->runOnMachineFunction(mf);
@ -974,6 +977,8 @@ void UserValue::emitDebugValues(VirtRegMap *VRM, LiveIntervals &LIS,
void LDVImpl::emitDebugValues(VirtRegMap *VRM) { void LDVImpl::emitDebugValues(VirtRegMap *VRM) {
DEBUG(dbgs() << "********** EMITTING LIVE DEBUG VARIABLES **********\n"); DEBUG(dbgs() << "********** EMITTING LIVE DEBUG VARIABLES **********\n");
if (!MF)
return;
const TargetInstrInfo *TII = MF->getTarget().getInstrInfo(); const TargetInstrInfo *TII = MF->getTarget().getInstrInfo();
for (unsigned i = 0, e = userValues.size(); i != e; ++i) { for (unsigned i = 0, e = userValues.size(); i != e; ++i) {
DEBUG(userValues[i]->print(dbgs(), &MF->getTarget())); DEBUG(userValues[i]->print(dbgs(), &MF->getTarget()));
@ -988,6 +993,10 @@ void LiveDebugVariables::emitDebugValues(VirtRegMap *VRM) {
static_cast<LDVImpl*>(pImpl)->emitDebugValues(VRM); static_cast<LDVImpl*>(pImpl)->emitDebugValues(VRM);
} }
bool LiveDebugVariables::doInitialization(Module &M) {
FunctionDIs = makeSubprogramMap(M);
return Pass::doInitialization(M);
}
#ifndef NDEBUG #ifndef NDEBUG
void LiveDebugVariables::dump() { void LiveDebugVariables::dump() {

3
llvm/lib/CodeGen/LiveDebugVariables.h
View File

@ -22,6 +22,7 @@
#define LLVM_CODEGEN_LIVEDEBUGVARIABLES_H #define LLVM_CODEGEN_LIVEDEBUGVARIABLES_H
#include "llvm/ADT/ArrayRef.h" #include "llvm/ADT/ArrayRef.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h" #include "llvm/CodeGen/MachineFunctionPass.h"
namespace llvm { namespace llvm {
@ -32,6 +33,7 @@ class VirtRegMap;
class LiveDebugVariables : public MachineFunctionPass { class LiveDebugVariables : public MachineFunctionPass {
void *pImpl; void *pImpl;
DenseMap<const Function*, DISubprogram> FunctionDIs;
public: public:
static char ID; // Pass identification, replacement for typeid static char ID; // Pass identification, replacement for typeid
@ -64,6 +66,7 @@ private:
bool runOnMachineFunction(MachineFunction &) override; bool runOnMachineFunction(MachineFunction &) override;
void releaseMemory() override; void releaseMemory() override;
void getAnalysisUsage(AnalysisUsage &) const override; void getAnalysisUsage(AnalysisUsage &) const override;
bool doInitialization(Module &) override;
}; };

2
llvm/test/CodeGen/X86/2010-06-01-DeadArg-DbgInfo.ll
View File

@ -24,7 +24,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
!llvm.dbg.lv = !{!0, !14, !15, !16, !17, !24, !25, !28} !llvm.dbg.lv = !{!0, !14, !15, !16, !17, !24, !25, !28}
!0 = metadata !{i32 786689, metadata !1, metadata !"this", metadata !3, i32 11, metadata !12, i32 0, null} ; [ DW_TAG_arg_variable ] !0 = metadata !{i32 786689, metadata !1, metadata !"this", metadata !3, i32 11, metadata !12, i32 0, null} ; [ DW_TAG_arg_variable ]
!1 = metadata !{i32 786478, metadata !31, metadata !2, metadata !"bar", metadata !"bar", metadata !"_ZN3foo3barEi", i32 11, metadata !9, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 true, i32 (%struct.foo*, i32)* @_ZN3foo3bazEi, null, null, null, i32 11} ; [ DW_TAG_subprogram ] !1 = metadata !{i32 786478, metadata !31, metadata !2, metadata !"bar", metadata !"bar", metadata !"_ZN3foo3barEi", i32 11, metadata !9, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 true, i32 (%struct.foo*, i32)* null, null, null, null, i32 11} ; [ DW_TAG_subprogram ]
!2 = metadata !{i32 786451, metadata !31, metadata !3, metadata !"foo", i32 3, i64 32, i64 32, i64 0, i32 0, null, metadata !5, i32 0, null, null, null} ; [ DW_TAG_structure_type ] [foo] [line 3, size 32, align 32, offset 0] [def] [from ] !2 = metadata !{i32 786451, metadata !31, metadata !3, metadata !"foo", i32 3, i64 32, i64 32, i64 0, i32 0, null, metadata !5, i32 0, null, null, null} ; [ DW_TAG_structure_type ] [foo] [line 3, size 32, align 32, offset 0] [def] [from ]
!3 = metadata !{i32 786473, metadata !31} ; [ DW_TAG_file_type ] !3 = metadata !{i32 786473, metadata !31} ; [ DW_TAG_file_type ]
!4 = metadata !{i32 786449, metadata !31, i32 4, metadata !"4.2.1 LLVM build", i1 true, metadata !"", i32 0, metadata !32, metadata !32, metadata !33, null, null, metadata !""} ; [ DW_TAG_compile_unit ] !4 = metadata !{i32 786449, metadata !31, i32 4, metadata !"4.2.1 LLVM build", i1 true, metadata !"", i32 0, metadata !32, metadata !32, metadata !33, null, null, metadata !""} ; [ DW_TAG_compile_unit ]

165
llvm/test/CodeGen/X86/dbg-changes-codegen-branch-folding.ll
View File

@ -52,58 +52,153 @@ define void @_Z3barii(i32 %param1, i32 %param2) #0 {
entry: entry:
%var1 = alloca %struct.AAA3, align 1 %var1 = alloca %struct.AAA3, align 1
%var2 = alloca %struct.AAA3, align 1 %var2 = alloca %struct.AAA3, align 1
%tobool = icmp eq i32 %param2, 0 tail call void @llvm.dbg.value(metadata !{i32 %param1}, i64 0, metadata !30), !dbg !47
br i1 %tobool, label %if.end, label %if.then tail call void @llvm.dbg.value(metadata !{i32 %param2}, i64 0, metadata !31), !dbg !47
tail call void @llvm.dbg.value(metadata !48, i64 0, metadata !32), !dbg !49
%tobool = icmp eq i32 %param2, 0, !dbg !50
br i1 %tobool, label %if.end, label %if.then, !dbg !50
if.then: ; preds = %entry if.then: ; preds = %entry
%call = call i8* @_Z5i2stri(i32 %param2) %call = tail call i8* @_Z5i2stri(i32 %param2), !dbg !52
br label %if.end tail call void @llvm.dbg.value(metadata !{i8* %call}, i64 0, metadata !32), !dbg !49
br label %if.end, !dbg !54
if.end: ; preds = %entry, %if.then if.end: ; preds = %entry, %if.then
call void @llvm.dbg.value(metadata !{%struct.AAA3* %var1}, i64 0, metadata !60) tail call void @llvm.dbg.value(metadata !{%struct.AAA3* %var1}, i64 0, metadata !33), !dbg !55
call void @llvm.dbg.value(metadata !62, i64 0, metadata !63) tail call void @llvm.dbg.value(metadata !{%struct.AAA3* %var1}, i64 0, metadata !56), !dbg !57
%arraydecay.i = getelementptr inbounds %struct.AAA3* %var1, i64 0, i32 0, i64 0 tail call void @llvm.dbg.value(metadata !58, i64 0, metadata !59), !dbg !60
call void @_Z3fooPcjPKc(i8* %arraydecay.i, i32 4, i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)) %arraydecay.i = getelementptr inbounds %struct.AAA3* %var1, i64 0, i32 0, i64 0, !dbg !61
call void @llvm.dbg.declare(metadata !{%struct.AAA3* %var2}, metadata !38) call void @_Z3fooPcjPKc(i8* %arraydecay.i, i32 4, i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)), !dbg !61
%arraydecay.i5 = getelementptr inbounds %struct.AAA3* %var2, i64 0, i32 0, i64 0 call void @llvm.dbg.value(metadata !{%struct.AAA3* %var2}, i64 0, metadata !34), !dbg !63
call void @_Z3fooPcjPKc(i8* %arraydecay.i5, i32 4, i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)) call void @llvm.dbg.value(metadata !{%struct.AAA3* %var2}, i64 0, metadata !64), !dbg !65
%tobool1 = icmp eq i32 %param1, 0 call void @llvm.dbg.value(metadata !58, i64 0, metadata !66), !dbg !67
br i1 %tobool1, label %if.else, label %if.then2 %arraydecay.i5 = getelementptr inbounds %struct.AAA3* %var2, i64 0, i32 0, i64 0, !dbg !68
call void @_Z3fooPcjPKc(i8* %arraydecay.i5, i32 4, i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)), !dbg !68
%tobool1 = icmp eq i32 %param1, 0, !dbg !69
call void @llvm.dbg.value(metadata !{%struct.AAA3* %var2}, i64 0, metadata !34), !dbg !63
br i1 %tobool1, label %if.else, label %if.then2, !dbg !69
if.then2: ; preds = %if.end if.then2: ; preds = %if.end
call void @_Z3fooPcjPKc(i8* %arraydecay.i5, i32 4, i8* getelementptr inbounds ([2 x i8]* @.str1, i64 0, i64 0)) call void @llvm.dbg.value(metadata !{%struct.AAA3* %var2}, i64 0, metadata !71), !dbg !73
br label %if.end3 call void @llvm.dbg.value(metadata !74, i64 0, metadata !75), !dbg !76
call void @_Z3fooPcjPKc(i8* %arraydecay.i5, i32 4, i8* getelementptr inbounds ([2 x i8]* @.str1, i64 0, i64 0)), !dbg !76
br label %if.end3, !dbg !72
if.else: ; preds = %if.end if.else: ; preds = %if.end
call void @_Z3fooPcjPKc(i8* %arraydecay.i5, i32 4, i8* getelementptr inbounds ([2 x i8]* @.str2, i64 0, i64 0)) call void @llvm.dbg.value(metadata !{%struct.AAA3* %var2}, i64 0, metadata !77), !dbg !79
call void @llvm.dbg.value(metadata !80, i64 0, metadata !81), !dbg !82
call void @_Z3fooPcjPKc(i8* %arraydecay.i5, i32 4, i8* getelementptr inbounds ([2 x i8]* @.str2, i64 0, i64 0)), !dbg !82
br label %if.end3 br label %if.end3
if.end3: ; preds = %if.else, %if.then2 if.end3: ; preds = %if.else, %if.then2
call void @_Z3fooPcjPKc(i8* %arraydecay.i, i32 4, i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)) call void @llvm.dbg.value(metadata !{%struct.AAA3* %var1}, i64 0, metadata !33), !dbg !55
ret void call void @llvm.dbg.value(metadata !{%struct.AAA3* %var1}, i64 0, metadata !83), !dbg !85
call void @llvm.dbg.value(metadata !58, i64 0, metadata !86), !dbg !87
call void @_Z3fooPcjPKc(i8* %arraydecay.i, i32 4, i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)), !dbg !87
ret void, !dbg !88
} }
; Function Attrs: nounwind readnone declare i8* @_Z5i2stri(i32) #1
declare void @llvm.dbg.declare(metadata, metadata) #1
declare i8* @_Z5i2stri(i32) #2 declare void @_Z3fooPcjPKc(i8*, i32, i8*) #1
declare void @_Z3fooPcjPKc(i8*, i32, i8*) #2
; Function Attrs: nounwind readnone ; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata) #1 declare void @llvm.dbg.value(metadata, i64, metadata) #2
attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone } attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } attributes #2 = { nounwind readnone }
!llvm.module.flags = !{!48, !49} !llvm.dbg.cu = !{!0}
!llvm.ident = !{!50} !llvm.module.flags = !{!44, !45}
!llvm.ident = !{!46}
!38 = metadata !{i32 786688, null, metadata !"var2", null, i32 20, null, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [var2] [line 20] !0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 ", i1 true, metadata !"", i32 0, metadata !2, metadata !3, metadata !23, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/dbg-changes-codegen-branch-folding.cpp] [DW_LANG_C_plus_plus]
!48 = metadata !{i32 2, metadata !"Dwarf Version", i32 4} !1 = metadata !{metadata !"dbg-changes-codegen-branch-folding.cpp", metadata !"/tmp/dbginfo"}
!49 = metadata !{i32 1, metadata !"Debug Info Version", i32 1} !2 = metadata !{}
!50 = metadata !{metadata !"clang version 3.5 (202418)"} !3 = metadata !{metadata !4}
!60 = metadata !{i32 786689, null, metadata !"this", null, i32 16777216, null, i32 1088, null} ; [ DW_TAG_arg_variable ] [this] [line 0] !4 = metadata !{i32 786451, metadata !1, null, metadata !"AAA3", i32 4, i64 32, i64 8, i32 0, i32 0, null, metadata !5, i32 0, null, null, metadata !"_ZTS4AAA3"} ; [ DW_TAG_structure_type ] [AAA3] [line 4, size 32, align 8, offset 0] [def] [from ]
!62 = metadata !{i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)} !5 = metadata !{metadata !6, metadata !11, metadata !17, metadata !18}
!63 = metadata !{i32 786689, null, metadata !"value", null, i32 33554439, null, i32 0, null} ; [ DW_TAG_arg_variable ] [value] [line 7] !6 = metadata !{i32 786445, metadata !1, metadata !"_ZTS4AAA3", metadata !"text", i32 8, i64 32, i64 8, i64 0, i32 0, metadata !7} ; [ DW_TAG_member ] [text] [line 8, size 32, align 8, offset 0] [from ]
!7 = metadata !{i32 786433, null, null, metadata !"", i32 0, i64 32, i64 8, i32 0, i32 0, metadata !8, metadata !9, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 32, align 8, offset 0] [from char]
!8 = metadata !{i32 786468, null, null, metadata !"char", i32 0, i64 8, i64 8, i64 0, i32 0, i32 6} ; [ DW_TAG_base_type ] [char] [line 0, size 8, align 8, offset 0, enc DW_ATE_signed_char]
!9 = metadata !{metadata !10}
!10 = metadata !{i32 786465, i64 0, i64 4} ; [ DW_TAG_subrange_type ] [0, 3]
!11 = metadata !{i32 786478, metadata !1, metadata !"_ZTS4AAA3", metadata !"AAA3", metadata !"AAA3", metadata !"", i32 5, metadata !12, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, null, i32 5} ; [ DW_TAG_subprogram ] [line 5] [AAA3]
!12 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !13, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!13 = metadata !{null, metadata !14, metadata !15}
!14 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !"_ZTS4AAA3"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from _ZTS4AAA3]
!15 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !16} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from ]
!16 = metadata !{i32 786470, null, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, metadata !8} ; [ DW_TAG_const_type ] [line 0, size 0, align 0, offset 0] [from char]
!17 = metadata !{i32 786478, metadata !1, metadata !"_ZTS4AAA3", metadata !"operator=", metadata !"operator=", metadata !"_ZN4AAA3aSEPKc", i32 6, metadata !12, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, null, i32 6} ; [ DW_TAG_subprogram ] [line 6] [operator=]
!18 = metadata !{i32 786478, metadata !1, metadata !"_ZTS4AAA3", metadata !"operator const char *", metadata !"operator const char *", metadata !"_ZNK4AAA3cvPKcEv", i32 7, metadata !19, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, null, i32 7} ; [ DW_TAG_subprogram ] [line 7] [operator const char *]
!19 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !20, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!20 = metadata !{metadata !15, metadata !21}
!21 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !22} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from ]
!22 = metadata !{i32 786470, null, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, metadata !"_ZTS4AAA3"} ; [ DW_TAG_const_type ] [line 0, size 0, align 0, offset 0] [from _ZTS4AAA3]
!23 = metadata !{metadata !24, metadata !35, metadata !40}
!24 = metadata !{i32 786478, metadata !1, metadata !25, metadata !"bar", metadata !"bar", metadata !"_Z3barii", i32 11, metadata !26, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void (i32, i32)* @_Z3barii, null, null, metadata !29, i32 11} ; [ DW_TAG_subprogram ] [line 11] [def] [bar]
!25 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/dbg-changes-codegen-branch-folding.cpp]
!26 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !27, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!27 = metadata !{null, metadata !28, metadata !28}
!28 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
!29 = metadata !{metadata !30, metadata !31, metadata !32, metadata !33, metadata !34}
!30 = metadata !{i32 786689, metadata !24, metadata !"param1", metadata !25, i32 16777227, metadata !28, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [param1] [line 11]
!31 = metadata !{i32 786689, metadata !24, metadata !"param2", metadata !25, i32 33554443, metadata !28, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [param2] [line 11]
!32 = metadata !{i32 786688, metadata !24, metadata !"temp", metadata !25, i32 12, metadata !15, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [temp] [line 12]
!33 = metadata !{i32 786688, metadata !24, metadata !"var1", metadata !25, i32 17, metadata !"_ZTS4AAA3", i32 0, i32 0} ; [ DW_TAG_auto_variable ] [var1] [line 17]
!34 = metadata !{i32 786688, metadata !24, metadata !"var2", metadata !25, i32 18, metadata !"_ZTS4AAA3", i32 0, i32 0} ; [ DW_TAG_auto_variable ] [var2] [line 18]
!35 = metadata !{i32 786478, metadata !1, metadata !"_ZTS4AAA3", metadata !"operator=", metadata !"operator=", metadata !"_ZN4AAA3aSEPKc", i32 6, metadata !12, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, null, null, metadata !17, metadata !36, i32 6} ; [ DW_TAG_subprogram ] [line 6] [def] [operator=]
!36 = metadata !{metadata !37, metadata !39}
!37 = metadata !{i32 786689, metadata !35, metadata !"this", null, i32 16777216, metadata !38, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this] [line 0]
!38 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !"_ZTS4AAA3"} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from _ZTS4AAA3]
!39 = metadata !{i32 786689, metadata !35, metadata !"value", metadata !25, i32 33554438, metadata !15, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [value] [line 6]
!40 = metadata !{i32 786478, metadata !1, metadata !"_ZTS4AAA3", metadata !"AAA3", metadata !"AAA3", metadata !"_ZN4AAA3C2EPKc", i32 5, metadata !12, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, null, null, metadata !11, metadata !41, i32 5} ; [ DW_TAG_subprogram ] [line 5] [def] [AAA3]
!41 = metadata !{metadata !42, metadata !43}
!42 = metadata !{i32 786689, metadata !40, metadata !"this", null, i32 16777216, metadata !38, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this] [line 0]
!43 = metadata !{i32 786689, metadata !40, metadata !"value", metadata !25, i32 33554437, metadata !15, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [value] [line 5]
!44 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
!45 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
!46 = metadata !{metadata !"clang version 3.5.0 "}
!47 = metadata !{i32 11, i32 0, metadata !24, null}
!48 = metadata !{i8* null}
!49 = metadata !{i32 12, i32 0, metadata !24, null}
!50 = metadata !{i32 14, i32 0, metadata !51, null}
!51 = metadata !{i32 786443, metadata !1, metadata !24, i32 14, i32 0, i32 0, i32 0} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/dbg-changes-codegen-branch-folding.cpp]
!52 = metadata !{i32 15, i32 0, metadata !53, null}
!53 = metadata !{i32 786443, metadata !1, metadata !51, i32 14, i32 0, i32 0, i32 1} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/dbg-changes-codegen-branch-folding.cpp]
!54 = metadata !{i32 16, i32 0, metadata !53, null}
!55 = metadata !{i32 17, i32 0, metadata !24, null}
!56 = metadata !{i32 786689, metadata !40, metadata !"this", null, i32 16777216, metadata !38, i32 1088, metadata !55} ; [ DW_TAG_arg_variable ] [this] [line 0]
!57 = metadata !{i32 0, i32 0, metadata !40, metadata !55}
!58 = metadata !{i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)}
!59 = metadata !{i32 786689, metadata !40, metadata !"value", metadata !25, i32 33554437, metadata !15, i32 0, metadata !55} ; [ DW_TAG_arg_variable ] [value] [line 5]
!60 = metadata !{i32 5, i32 0, metadata !40, metadata !55}
!61 = metadata !{i32 5, i32 0, metadata !62, metadata !55}
!62 = metadata !{i32 786443, metadata !1, metadata !40, i32 5, i32 0, i32 0, i32 3} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/dbg-changes-codegen-branch-folding.cpp]
!63 = metadata !{i32 18, i32 0, metadata !24, null}
!64 = metadata !{i32 786689, metadata !40, metadata !"this", null, i32 16777216, metadata !38, i32 1088, metadata !63} ; [ DW_TAG_arg_variable ] [this] [line 0]
!65 = metadata !{i32 0, i32 0, metadata !40, metadata !63}
!66 = metadata !{i32 786689, metadata !40, metadata !"value", metadata !25, i32 33554437, metadata !15, i32 0, metadata !63} ; [ DW_TAG_arg_variable ] [value] [line 5]
!67 = metadata !{i32 5, i32 0, metadata !40, metadata !63}
!68 = metadata !{i32 5, i32 0, metadata !62, metadata !63}
!69 = metadata !{i32 20, i32 0, metadata !70, null}
!70 = metadata !{i32 786443, metadata !1, metadata !24, i32 20, i32 0, i32 0, i32 2} ; [ DW_TAG_lexical_block ] [/tmp/dbginfo/dbg-changes-codegen-branch-folding.cpp]
!71 = metadata !{i32 786689, metadata !35, metadata !"this", null, i32 16777216, metadata !38, i32 1088, metadata !72} ; [ DW_TAG_arg_variable ] [this] [line 0]
!72 = metadata !{i32 21, i32 0, metadata !70, null}
!73 = metadata !{i32 0, i32 0, metadata !35, metadata !72}
!74 = metadata !{i8* getelementptr inbounds ([2 x i8]* @.str1, i64 0, i64 0)}
!75 = metadata !{i32 786689, metadata !35, metadata !"value", metadata !25, i32 33554438, metadata !15, i32 0, metadata !72} ; [ DW_TAG_arg_variable ] [value] [line 6]
!76 = metadata !{i32 6, i32 0, metadata !35, metadata !72}
!77 = metadata !{i32 786689, metadata !35, metadata !"this", null, i32 16777216, metadata !38, i32 1088, metadata !78} ; [ DW_TAG_arg_variable ] [this] [line 0]
!78 = metadata !{i32 23, i32 0, metadata !70, null}
!79 = metadata !{i32 0, i32 0, metadata !35, metadata !78}
!80 = metadata !{i8* getelementptr inbounds ([2 x i8]* @.str2, i64 0, i64 0)}
!81 = metadata !{i32 786689, metadata !35, metadata !"value", metadata !25, i32 33554438, metadata !15, i32 0, metadata !78} ; [ DW_TAG_arg_variable ] [value] [line 6]
!82 = metadata !{i32 6, i32 0, metadata !35, metadata !78}
!83 = metadata !{i32 786689, metadata !35, metadata !"this", null, i32 16777216, metadata !38, i32 1088, metadata !84} ; [ DW_TAG_arg_variable ] [this] [line 0]
!84 = metadata !{i32 24, i32 0, metadata !24, null}
!85 = metadata !{i32 0, i32 0, metadata !35, metadata !84}
!86 = metadata !{i32 786689, metadata !35, metadata !"value", metadata !25, i32 33554438, metadata !15, i32 0, metadata !84} ; [ DW_TAG_arg_variable ] [value] [line 6]
!87 = metadata !{i32 6, i32 0, metadata !35, metadata !84}
!88 = metadata !{i32 25, i32 0, metadata !24, null}

4
llvm/test/DebugInfo/X86/concrete_out_of_line.ll
View File

@ -79,7 +79,7 @@ declare void @_Z8moz_freePv(i8*)
!0 = metadata !{i32 786449, metadata !59, i32 4, metadata !"clang version 3.1 ()", i1 true, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !47, metadata !1, metadata !""} ; [ DW_TAG_compile_unit ] !0 = metadata !{i32 786449, metadata !59, i32 4, metadata !"clang version 3.1 ()", i1 true, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !47, metadata !1, metadata !""} ; [ DW_TAG_compile_unit ]
!1 = metadata !{} !1 = metadata !{}
!3 = metadata !{metadata !5, metadata !23, metadata !27, metadata !31} !3 = metadata !{metadata !5, metadata !23, metadata !27, metadata !31}
!5 = metadata !{i32 720942, metadata !6, null, metadata !"Release", metadata !"Release", metadata !"_ZN17nsAutoRefCnt7ReleaseEv", i32 14, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32* null, null, metadata !12, metadata !20, i32 14} ; [ DW_TAG_subprogram ] [line 14] [def] [Release] !5 = metadata !{i32 720942, metadata !6, null, metadata !"Release", metadata !"Release", metadata !"_ZN17nsAutoRefCnt7ReleaseEv", i32 14, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32 ()* @_ZN17nsAutoRefCnt7ReleaseEv , null, metadata !12, metadata !20, i32 14} ; [ DW_TAG_subprogram ] [line 14] [def] [Release]
!6 = metadata !{i32 720937, metadata !59} ; [ DW_TAG_file_type ] !6 = metadata !{i32 720937, metadata !59} ; [ DW_TAG_file_type ]
!7 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] !7 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!8 = metadata !{metadata !9, metadata !10} !8 = metadata !{metadata !9, metadata !10}
@ -95,7 +95,7 @@ declare void @_Z8moz_freePv(i8*)
!18 = metadata !{} !18 = metadata !{}
!20 = metadata !{metadata !22} !20 = metadata !{metadata !22}
!22 = metadata !{i32 786689, metadata !5, metadata !"this", metadata !6, i32 16777230, metadata !10, i32 64, i32 0} ; [ DW_TAG_arg_variable ] !22 = metadata !{i32 786689, metadata !5, metadata !"this", metadata !6, i32 16777230, metadata !10, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
!23 = metadata !{i32 720942, metadata !6, null, metadata !"~nsAutoRefCnt", metadata !"~nsAutoRefCnt", metadata !"_ZN17nsAutoRefCntD1Ev", i32 18, metadata !16, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32* null, null, metadata !15, metadata !24, i32 18} ; [ DW_TAG_subprogram ] [line 18] [def] [~nsAutoRefCnt] !23 = metadata !{i32 720942, metadata !6, null, metadata !"~nsAutoRefCnt", metadata !"~nsAutoRefCnt", metadata !"_ZN17nsAutoRefCntD1Ev", i32 18, metadata !16, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void ()* @_ZN17nsAutoRefCntD1Ev, null, metadata !15, metadata !24, i32 18} ; [ DW_TAG_subprogram ] [line 18] [def] [~nsAutoRefCnt]
!24 = metadata !{metadata !26} !24 = metadata !{metadata !26}
!26 = metadata !{i32 786689, metadata !23, metadata !"this", metadata !6, i32 16777234, metadata !10, i32 64, i32 0} ; [ DW_TAG_arg_variable ] !26 = metadata !{i32 786689, metadata !23, metadata !"this", metadata !6, i32 16777234, metadata !10, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
!27 = metadata !{i32 720942, metadata !6, null, metadata !"~nsAutoRefCnt", metadata !"~nsAutoRefCnt", metadata !"_ZN17nsAutoRefCntD2Ev", i32 18, metadata !16, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32* null, null, metadata !15, metadata !28, i32 18} ; [ DW_TAG_subprogram ] [line 18] [def] [~nsAutoRefCnt] !27 = metadata !{i32 720942, metadata !6, null, metadata !"~nsAutoRefCnt", metadata !"~nsAutoRefCnt", metadata !"_ZN17nsAutoRefCntD2Ev", i32 18, metadata !16, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32* null, null, metadata !15, metadata !28, i32 18} ; [ DW_TAG_subprogram ] [line 18] [def] [~nsAutoRefCnt]

51
llvm/test/DebugInfo/nodebug.ll Normal file
View File

@ -0,0 +1,51 @@
; REQUIRES: object-emission
; RUN: %llc_dwarf < %s -filetype=obj | llvm-dwarfdump -debug-dump=info - | FileCheck %s
; Test that a nodebug function (a function not appearing in the debug info IR
; metadata subprogram list) with DebugLocs on its IR doesn't cause crashes/does
; the right thing.
; Build with clang from the following:
; extern int i;
; inline __attribute__((always_inline)) void f1() {
; i = 3;
; }
;
; __attribute__((nodebug)) void f2() {
; f1();
; }
; Check that there's only one DW_TAG_subprogram, nothing for the 'f2' function.
; CHECK: DW_TAG_subprogram
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name {{.*}} "f1"
; CHECK-NOT: DW_TAG_subprogram
@i = external global i32
; Function Attrs: uwtable
define void @_Z2f2v() #0 {
entry:
store i32 3, i32* @i, align 4, !dbg !11
ret void
}
attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!8, !9}
!llvm.ident = !{!10}
!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/nodebug.cpp] [DW_LANG_C_plus_plus]
!1 = metadata !{metadata !"nodebug.cpp", metadata !"/tmp/dbginfo"}
!2 = metadata !{}
!3 = metadata !{metadata !4}
!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"f1", metadata !"f1", metadata !"_Z2f1v", i32 2, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, null, null, null, metadata !2, i32 2} ; [ DW_TAG_subprogram ] [line 2] [def] [f1]
!5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/nodebug.cpp]
!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!7 = metadata !{null}
!8 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
!9 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
!10 = metadata !{metadata !"clang version 3.5.0 "}
!11 = metadata !{i32 3, i32 0, metadata !4, null}