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Adjust debug range offsets for isWeakForLinker() functions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102127 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-04-22 20:52:00 +00:00
parent 9c675f14c1
commit 18ee3bb0b7
3 changed files with 67 additions and 6 deletions
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34
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -1384,6 +1384,11 @@ DIE *DwarfDebug::constructLexicalScopeDIE(DbgScope *Scope) {
if (Ranges.empty())
return 0;
bool MarkFunctionBegin = false;
if (FunctionBeginSym &&
Asm->MF->getFunction()->isWeakForLinker())
MarkFunctionBegin = true;
SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin();
if (Ranges.size() > 1) {
// .debug_range section has not been laid out yet. Emit offset in
@ -1393,8 +1398,15 @@ DIE *DwarfDebug::constructLexicalScopeDIE(DbgScope *Scope) {
DebugRangeSymbols.size() * Asm->getTargetData().getPointerSize());
for (SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin(),
RE = Ranges.end(); RI != RE; ++RI) {
DebugRangeSymbols.push_back(LabelsBeforeInsn.lookup(RI->first));
DebugRangeSymbols.push_back(LabelsAfterInsn.lookup(RI->second));
MCSymbol *Sym = LabelsBeforeInsn.lookup(RI->first);
if (MarkFunctionBegin)
WeakDebugRangeSymbols.insert(std::make_pair(Sym, FunctionBeginSym));
DebugRangeSymbols.push_back(Sym);
Sym = LabelsAfterInsn.lookup(RI->second);
if (MarkFunctionBegin)
WeakDebugRangeSymbols.insert(std::make_pair(Sym, FunctionBeginSym));
DebugRangeSymbols.push_back(Sym);
}
DebugRangeSymbols.push_back(NULL);
DebugRangeSymbols.push_back(NULL);
@ -3228,11 +3240,21 @@ void DwarfDebug::emitDebugRanges() {
// Start the dwarf ranges section.
Asm->OutStreamer.SwitchSection(
Asm->getObjFileLowering().getDwarfRangesSection());
for (SmallVector<const MCSymbol *, 8>::const_iterator I = DebugRangeSymbols.begin(),
E = DebugRangeSymbols.end(); I != E; ++I) {
if (*I)
Asm->EmitLabelDifference(*I, TextSectionSym,
for (SmallVector<const MCSymbol *, 8>::const_iterator
I = DebugRangeSymbols.begin(), E = DebugRangeSymbols.end();
I != E; ++I) {
if (*I) {
const MCSymbol *Begin = TextSectionSym;
// If this symbol is inside linkonce section then use appropriate begin
// marker;
DenseMap<const MCSymbol *, const MCSymbol *>::iterator WI
= WeakDebugRangeSymbols.find(*I);
if (WI != WeakDebugRangeSymbols.end())
Begin = WI->second;
Asm->EmitLabelDifference(*I, Begin,
Asm->getTargetData().getPointerSize());
}
else
Asm->OutStreamer.EmitIntValue(0, Asm->getTargetData().getPointerSize(),
/*addrspace*/0);

1
lib/CodeGen/AsmPrinter/DwarfDebug.h
View File

@ -197,6 +197,7 @@ class DwarfDebug {
DenseMap<const MachineInstr *, MCSymbol *> LabelsAfterInsn;
SmallVector<const MCSymbol *, 8> DebugRangeSymbols;
DenseMap<const MCSymbol *, const MCSymbol *> WeakDebugRangeSymbols;
/// Previous instruction's location information. This is used to determine
/// label location to indicate scope boundries in dwarf debug info.

38
test/DebugInfo/2010-04-22-range.ll Normal file
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@ -0,0 +1,38 @@
; RUN: llc < %s | grep "Ltmp3-Lfunc_begin"
; PR 6894
declare void @_Z7examplev() ssp
define linkonce_odr void @_bar(i64, i64, i64 %__depth_limit) ssp {
entry:
br i1 undef, label %while.body, label %while.end, !dbg !0
while.body: ; preds = %entry
br i1 undef, label %if.then, label %if.end, !dbg !8
if.then: ; preds = %while.body
call void @_Z7examplev(), !dbg !10
ret void, !dbg !12
if.end: ; preds = %while.body
call void @_Z7examplev(), !dbg !13
unreachable
while.end: ; preds = %entry
ret void, !dbg !12
}
!0 = metadata !{i32 2742, i32 7, metadata !1, null}
!1 = metadata !{i32 524299, metadata !2, i32 2738, i32 5} ; [ DW_TAG_lexical_block ]
!2 = metadata !{i32 524334, i32 0, metadata !3, metadata !"__introsort_loop", metadata !"__introsort_loop", metadata !"_bar", metadata !3, i32 2738, metadata !5, i1 false, i1 true, i32 0, i32 0, null, i1 false} ; [ DW_TAG_subprogram ]
!3 = metadata !{i32 524329, metadata !"stl_algo.h", metadata !"/usr/include/c++/4.2.1/bits", metadata !4} ; [ DW_TAG_file_type ]
!4 = metadata !{i32 524305, i32 0, i32 4, metadata !"example.cc", metadata !"/tmp", metadata !"clang 1.5", i1 true, i1 false, metadata !"", i32 0} ; [ DW_TAG_compile_unit ]
!5 = metadata !{i32 524309, metadata !6, metadata !"", metadata !6, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null} ; [ DW_TAG_subroutine_type ]
!6 = metadata !{i32 524329, metadata !"example.cc", metadata !"/tmp", metadata !4} ; [ DW_TAG_file_type ]
!7 = metadata !{null}
!8 = metadata !{i32 2744, i32 4, metadata !9, null}
!9 = metadata !{i32 524299, metadata !1, i32 2743, i32 2} ; [ DW_TAG_lexical_block ]
!10 = metadata !{i32 2746, i32 8, metadata !11, null}
!11 = metadata !{i32 524299, metadata !9, i32 2745, i32 6} ; [ DW_TAG_lexical_block ]
!12 = metadata !{i32 2762, i32 5, metadata !1, null}
!13 = metadata !{i32 2750, i32 4, metadata !9, null}