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[WebAssembly] Simplify code that never has to handle physical registers. NFC. 

llvm-svn: 270137
This commit is contained in:
Dan Gohman 2016-05-19 21:07:20 +00:00
parent e5a17e3f1d
commit 847afa2231
1 changed files with 2 additions and 9 deletions
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11
llvm/lib/Target/WebAssembly/WebAssemblyPeephole.cpp
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@ -48,13 +48,6 @@ FunctionPass *llvm::createWebAssemblyPeephole() {
return new WebAssemblyPeephole();
}
static const TargetRegisterClass *GetRegClass(const MachineRegisterInfo &MRI,
unsigned RegNo) {
return TargetRegisterInfo::isVirtualRegister(RegNo)
? MRI.getRegClass(RegNo)
: MRI.getTargetRegisterInfo()->getMinimalPhysRegClass(RegNo);
}
/// If desirable, rewrite NewReg to a drop register.
static bool MaybeRewriteToDrop(unsigned OldReg, unsigned NewReg,
MachineOperand &MO,
@ -63,7 +56,7 @@ static bool MaybeRewriteToDrop(unsigned OldReg, unsigned NewReg,
bool Changed = false;
if (OldReg == NewReg) {
Changed = true;
unsigned NewReg = MRI.createVirtualRegister(GetRegClass(MRI, OldReg));
unsigned NewReg = MRI.createVirtualRegister(MRI.getRegClass(OldReg));
MO.setReg(NewReg);
MO.setIsDead();
MFI.stackifyVReg(NewReg);
@ -127,7 +120,7 @@ bool WebAssemblyPeephole::runOnMachineFunction(MachineFunction &MF) {
unsigned OldReg = MO.getReg();
unsigned NewReg = Op2.getReg();
if (GetRegClass(MRI, NewReg) != GetRegClass(MRI, OldReg))
if (MRI.getRegClass(NewReg) != MRI.getRegClass(OldReg))
report_fatal_error("Peephole: call to builtin function with "
"wrong signature, from/to mismatch");
Changed |= MaybeRewriteToDrop(OldReg, NewReg, MO, MFI, MRI);