Simplify. Eliminate unneeded debug_loc entry.
llvm-svn: 104785
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@ -2210,9 +2210,10 @@ void DwarfDebug::collectVariableInfo(const MachineFunction *MF) {
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}
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// handle multiple DBG_VALUE instructions describing one variable.
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RegVar->setDotDebugLocOffset(DotDebugLocEntries.size());
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if (DotDebugLocEntries.empty())
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DotDebugLocEntries.push_back(DotDebugLocEntry());
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RegVar->setDotDebugLocOffset(0);
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else
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RegVar->setDotDebugLocOffset(DotDebugLocEntries.size());
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const MachineInstr *Begin = NULL;
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const MachineInstr *End = NULL;
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for (SmallVector<const MachineInstr *, 4>::iterator
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@ -3481,23 +3482,22 @@ void DwarfDebug::emitDebugStr() {
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/// emitDebugLoc - Emit visible names into a debug loc section.
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///
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void DwarfDebug::emitDebugLoc() {
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if (DotDebugLocEntries.empty())
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return;
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// Start the dwarf loc section.
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Asm->OutStreamer.SwitchSection(
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Asm->getObjFileLowering().getDwarfLocSection());
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unsigned char Size = Asm->getTargetData().getPointerSize();
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unsigned index = 0;
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bool needMarker = true;
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Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_loc", 0));
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unsigned index = 1;
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for (SmallVector<DotDebugLocEntry, 4>::iterator I = DotDebugLocEntries.begin(),
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E = DotDebugLocEntries.end(); I != E; ++I, ++index) {
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DotDebugLocEntry Entry = *I;
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if (needMarker) {
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Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_loc", index));
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needMarker = false;
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}
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if (Entry.isEmpty()) {
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Asm->OutStreamer.EmitIntValue(0, Size, /*addrspace*/0);
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Asm->OutStreamer.EmitIntValue(0, Size, /*addrspace*/0);
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needMarker = true;
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Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_loc", index));
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} else {
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Asm->OutStreamer.EmitSymbolValue(Entry.Begin, Size, 0);
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Asm->OutStreamer.EmitSymbolValue(Entry.End, Size, 0);
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@ -55,7 +55,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
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!29 = metadata !{i32 524299, metadata !9, i32 17, i32 0} ; [ DW_TAG_lexical_block ]
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!30 = metadata !{i32 19, i32 0, metadata !29, null}
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; CHECK: Ldebug_loc1
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; CHECK: Ldebug_loc0:
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; CHECK-NEXT: .quad Lfunc_begin0
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; CHECK-NEXT: .quad Ltmp3
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; CHECK-NEXT: .short 1
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@ -1,5 +1,5 @@
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; RUN: llc -O2 < %s | grep debug_loc13
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; Test to check .debug_loc support. This test case emits 14 debug_loc entries.
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; RUN: llc -O2 < %s | grep debug_loc12
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; Test to check .debug_loc support. This test case emits 13 debug_loc entries.
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%0 = type { double }
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