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[BOLT][AArch64][instr] Remove instructions on saving and restoring NZCV #156994

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Merged
merged 1 commit into from
Sep 10, 2025
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[BOLT][AArch64][instr] Remove instructions on saving and restoring NZCV #156994

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8 changes: 2 additions & 6 deletions bolt/lib/Target/AArch64/AArch64MCPlusBuilder.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2517,21 +2517,17 @@ class AArch64MCPlusBuilder : public MCPlusBuilder {
createInstrIncMemory(const MCSymbol *Target, MCContext *Ctx, bool IsLeaf,
unsigned CodePointerSize) const override {
unsigned int I = 0;
InstructionListType Instrs(10);
InstructionListType Instrs(6);

createPushRegisters(Instrs[I++], AArch64::X0, AArch64::X1);
getSystemFlag(Instrs[I++], AArch64::X1);
InstructionListType Addr = materializeAddress(Target, Ctx, AArch64::X0);
assert(Addr.size() == 2 && "Invalid Addr size");
std::copy(Addr.begin(), Addr.end(), Instrs.begin() + I);
I += Addr.size();
storeReg(Instrs[I++], AArch64::X2, AArch64::SP);
InstructionListType Insts = createIncMemory(AArch64::X0, AArch64::X2);
InstructionListType Insts = createIncMemory(AArch64::X0, AArch64::X1);
assert(Insts.size() == 2 && "Invalid Insts size");
std::copy(Insts.begin(), Insts.end(), Instrs.begin() + I);
I += Insts.size();
loadReg(Instrs[I++], AArch64::X2, AArch64::SP);
setSystemFlag(Instrs[I++], AArch64::X1);
createPopRegisters(Instrs[I++], AArch64::X0, AArch64::X1);
return Instrs;
}
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