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[AArch64] Stop creating unnecessary label MCSymbols for each Windows unwind opcode. NFC. 

These labels aren't needed in the ARM version of WinEH tables, as each
unwind opcode maps to a specific instruction (each opcode is assumed
to represent one instruction), and the written tables don't contain
offsets like on x86_64.

Differential Revision: https://reviews.llvm.org/D125369
This commit is contained in:
Martin Storsjö 2021-11-11 12:55:10 +02:00
parent 490cd14fe6
commit 2d8ce08b09
1 changed files with 5 additions and 5 deletions
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10
llvm/lib/Target/AArch64/MCTargetDesc/AArch64WinCOFFStreamer.cpp
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@ -72,8 +72,7 @@ void AArch64TargetWinCOFFStreamer::emitARM64WinUnwindCode(unsigned UnwindCode,
WinEH::FrameInfo *CurFrame = S.EnsureValidWinFrameInfo(SMLoc());
if (!CurFrame)
return;
MCSymbol *Label = S.emitCFILabel();
auto Inst = WinEH::Instruction(UnwindCode, Label, Reg, Offset);
auto Inst = WinEH::Instruction(UnwindCode, /*Label=*/nullptr, Reg, Offset);
if (InEpilogCFI)
CurFrame->EpilogMap[CurrentEpilog].push_back(Inst);
else
@ -177,7 +176,8 @@ void AArch64TargetWinCOFFStreamer::emitARM64WinCFIPrologEnd() {
MCSymbol *Label = S.emitCFILabel();
CurFrame->PrologEnd = Label;
WinEH::Instruction Inst = WinEH::Instruction(Win64EH::UOP_End, Label, -1, 0);
WinEH::Instruction Inst =
WinEH::Instruction(Win64EH::UOP_End, /*Label=*/nullptr, -1, 0);
auto it = CurFrame->Instructions.begin();
CurFrame->Instructions.insert(it, Inst);
}
@ -199,8 +199,8 @@ void AArch64TargetWinCOFFStreamer::emitARM64WinCFIEpilogEnd() {
return;
InEpilogCFI = false;
MCSymbol *Label = S.emitCFILabel();
WinEH::Instruction Inst = WinEH::Instruction(Win64EH::UOP_End, Label, -1, 0);
WinEH::Instruction Inst =
WinEH::Instruction(Win64EH::UOP_End, /*Label=*/nullptr, -1, 0);
CurFrame->EpilogMap[CurrentEpilog].push_back(Inst);
CurrentEpilog = nullptr;
}