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Simplify. Eliminate unneeded debug_loc entry.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104785 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-05-26 23:55:23 +00:00
parent 8b3ca84a8d
commit 80250686d5
3 changed files with 12 additions and 12 deletions
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18
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -2210,9 +2210,10 @@ void DwarfDebug::collectVariableInfo(const MachineFunction *MF) {
}
// handle multiple DBG_VALUE instructions describing one variable.
RegVar->setDotDebugLocOffset(DotDebugLocEntries.size());
if (DotDebugLocEntries.empty())
DotDebugLocEntries.push_back(DotDebugLocEntry());
RegVar->setDotDebugLocOffset(0);
else
RegVar->setDotDebugLocOffset(DotDebugLocEntries.size());
const MachineInstr *Begin = NULL;
const MachineInstr *End = NULL;
for (SmallVector<const MachineInstr *, 4>::iterator
@ -3481,23 +3482,22 @@ void DwarfDebug::emitDebugStr() {
/// emitDebugLoc - Emit visible names into a debug loc section.
///
void DwarfDebug::emitDebugLoc() {
if (DotDebugLocEntries.empty())
return;
// Start the dwarf loc section.
Asm->OutStreamer.SwitchSection(
Asm->getObjFileLowering().getDwarfLocSection());
unsigned char Size = Asm->getTargetData().getPointerSize();
unsigned index = 0;
bool needMarker = true;
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_loc", 0));
unsigned index = 1;
for (SmallVector<DotDebugLocEntry, 4>::iterator I = DotDebugLocEntries.begin(),
E = DotDebugLocEntries.end(); I != E; ++I, ++index) {
DotDebugLocEntry Entry = *I;
if (needMarker) {
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_loc", index));
needMarker = false;
}
if (Entry.isEmpty()) {
Asm->OutStreamer.EmitIntValue(0, Size, /*addrspace*/0);
Asm->OutStreamer.EmitIntValue(0, Size, /*addrspace*/0);
needMarker = true;
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_loc", index));
} else {
Asm->OutStreamer.EmitSymbolValue(Entry.Begin, Size, 0);
Asm->OutStreamer.EmitSymbolValue(Entry.End, Size, 0);

2
test/CodeGen/X86/2010-05-26-DotDebugLoc.ll
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@ -55,7 +55,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
!29 = metadata !{i32 524299, metadata !9, i32 17, i32 0} ; [ DW_TAG_lexical_block ]
!30 = metadata !{i32 19, i32 0, metadata !29, null}
; CHECK: Ldebug_loc1
; CHECK: Ldebug_loc0:
; CHECK-NEXT: .quad Lfunc_begin0
; CHECK-NEXT: .quad Ltmp3
; CHECK-NEXT: .short 1

4
test/DebugInfo/2010-05-25-DotDebugLoc.ll
View File

@ -1,5 +1,5 @@
; RUN: llc -O2 < %s | grep debug_loc13
; Test to check .debug_loc support. This test case emits 14 debug_loc entries.
; RUN: llc -O2 < %s | grep debug_loc12
; Test to check .debug_loc support. This test case emits 13 debug_loc entries.
%0 = type { double }