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Fix debug info for blocks' variable. 

llvm-svn: 131940
This commit is contained in:
Devang Patel 2011-05-24 00:22:25 +00:00
parent 1ea0243bd0
commit 354fa0798f
1 changed files with 21 additions and 6 deletions
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27
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -2590,12 +2590,27 @@ void DwarfDebug::emitDebugLoc() {
unsigned i = 0;
Asm->OutStreamer.AddComment("Loc expr size");
if (N >= 2 && DV.getAddrElement(0) == DIBuilder::OpPlus) {
// If first address element is OpPlus then emit
// DW_OP_breg + Offset instead of DW_OP_reg + Offset.
MachineLocation Loc(Entry.Loc.getReg(), DV.getAddrElement(1));
Asm->EmitInt16(Asm->getDwarfRegOpSize(Loc) + N - 2);
Asm->EmitDwarfRegOp(Loc);
i = 2;
if (Entry.Loc.getOffset()) {
unsigned Size = Asm->getDwarfRegOpSize(Entry.Loc);
unsigned OffsetSize =
MCAsmInfo::getSLEB128Size(DV.getAddrElement(1));
// breg + deref + plus + offset
Asm->EmitInt16(Size + 1 + 1 + OffsetSize + N - 2);
i = 2;
Asm->EmitDwarfRegOp(Entry.Loc);
Asm->OutStreamer.AddComment("DW_OP_deref");
Asm->EmitInt8(dwarf::DW_OP_deref);
Asm->OutStreamer.AddComment("DW_OP_plus_uconst");
Asm->EmitInt8(dwarf::DW_OP_plus_uconst);
Asm->EmitSLEB128(DV.getAddrElement(1));
} else {
// If first address element is OpPlus then emit
// DW_OP_breg + Offset instead of DW_OP_reg + Offset.
MachineLocation Loc(Entry.Loc.getReg(), DV.getAddrElement(1));
Asm->EmitInt16(Asm->getDwarfRegOpSize(Loc) + N - 2);
Asm->EmitDwarfRegOp(Loc);
i = 2;
}
} else {
Asm->EmitInt16(Asm->getDwarfRegOpSize(Entry.Loc) + N);
Asm->EmitDwarfRegOp(Entry.Loc);