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Don't emit the FDE end label if the last thing emitted was a compact unwind and

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not the FDE


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135020 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-07-13 00:49:09 +00:00
parent 5cf2ee1f80
commit 8440fe2166
2 changed files with 18 additions and 8 deletions
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4
lib/MC/MCDwarf.cpp
View File

@ -1018,8 +1018,10 @@ void MCDwarfFrameEmitter::Emit(MCStreamer &Streamer,
for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) {
const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i);
if (IsEH && AsmInfo.getCompactUnwindSection() &&
Emitter.EmitCompactUnwind(Streamer, Frame))
Emitter.EmitCompactUnwind(Streamer, Frame)) {
FDEEnd = NULL;
continue;
}
CIEKey Key(Frame.Personality, Frame.PersonalityEncoding,
Frame.LsdaEncoding);

22
lib/Target/X86/X86FrameLowering.cpp
View File

@ -1059,13 +1059,21 @@ getCompactUnwindEncoding(ArrayRef<MCCFIInstruction> Instrs,
const bool IsRelative = (Operation == MCCFIInstruction::RelMove);
if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
if (Src.getReg() == MachineLocation::VirtualFP) {
// DW_CFA_def_cfa_offset
if (IsRelative)
CFAOffset += Src.getOffset();
else
CFAOffset -= Src.getOffset();
} // else DW_CFA_def_cfa
if (Src.getReg() != MachineLocation::VirtualFP) {
// DW_CFA_def_cfa
assert(FramePointerReg == -1 &&"Defining more than one frame pointer?");
FramePointerReg = Src.getReg();
if (TRI->getLLVMRegNum(FramePointerReg, IsEH) != X86::EBP &&
TRI->getLLVMRegNum(FramePointerReg, IsEH) != X86::RBP)
// The frame pointer isn't EBP/RBP. Cannot make unwind information
// compact.
return 0;
} // else DW_CFA_def_cfa_offset
if (IsRelative)
CFAOffset += Src.getOffset();
else
CFAOffset -= Src.getOffset();
continue;
}