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LocalStackSlotAllocation: Stop creating unused virtual register

This commit is contained in:
Matt Arsenault 2022-04-20 09:13:43 -04:00
parent 67aa8ed547
commit 4575f35ea1
1 changed files with 2 additions and 6 deletions
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8
llvm/lib/CodeGen/LocalStackSlotAllocation.cpp
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@ -344,7 +344,7 @@ bool LocalStackSlotPass::insertFrameReferenceRegisters(MachineFunction &Fn) {
MachineBasicBlock *Entry = &Fn.front();
unsigned BaseReg = 0;
Register BaseReg;
int64_t BaseOffset = 0;
// Loop through the frame references and allocate for them as necessary.
@ -414,10 +414,6 @@ bool LocalStackSlotPass::insertFrameReferenceRegisters(MachineFunction &Fn) {
continue;
}
const MachineFunction *MF = MI.getMF();
const TargetRegisterClass *RC = TRI->getPointerRegClass(*MF);
BaseReg = Fn.getRegInfo().createVirtualRegister(RC);
LLVM_DEBUG(dbgs() << " Materializing base register"
<< " at frame local offset "
<< LocalOffset + InstrOffset);
@ -437,7 +433,7 @@ bool LocalStackSlotPass::insertFrameReferenceRegisters(MachineFunction &Fn) {
++NumBaseRegisters;
UsedBaseReg = true;
}
assert(BaseReg != 0 && "Unable to allocate virtual base register!");
assert(BaseReg && "Unable to allocate virtual base register!");
// Modify the instruction to use the new base register rather
// than the frame index operand.