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Add SrcReg2 to analyzeCompare and optimizeCompareInstr to handle Compare

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instructions with two register operands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159465 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Manman Ren
2012-06-29 21:33:59 +00:00
parent 8ccaad526a
commit de7266c611
4 changed files with 50 additions and 35 deletions
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9
lib/CodeGen/PeepholeOptimizer.cpp
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@@ -368,14 +368,15 @@ bool PeepholeOptimizer::optimizeCmpInstr(MachineInstr *MI,
MachineBasicBlock *MBB) {
// If this instruction is a comparison against zero and isn't comparing a
// physical register, we can try to optimize it.
unsigned SrcReg;
unsigned SrcReg, SrcReg2;
int CmpMask, CmpValue;
if (!TII->AnalyzeCompare(MI, SrcReg, CmpMask, CmpValue) ||
TargetRegisterInfo::isPhysicalRegister(SrcReg))
if (!TII->analyzeCompare(MI, SrcReg, SrcReg2, CmpMask, CmpValue) ||
TargetRegisterInfo::isPhysicalRegister(SrcReg) ||
(SrcReg2 != 0 && TargetRegisterInfo::isPhysicalRegister(SrcReg2)))
return false;
// Attempt to optimize the comparison instruction.
if (TII->OptimizeCompareInstr(MI, SrcReg, CmpMask, CmpValue, MRI)) {
if (TII->optimizeCompareInstr(MI, SrcReg, SrcReg2, CmpMask, CmpValue, MRI)) {
++NumCmps;
return true;
}