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Check the "isSafeToMove" predicate, which has a series of tests to make sure

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that it's safe to remat an instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51659 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2008-05-28 22:52:47 +00:00
parent 745825f431
commit a8db14796b
1 changed files with 3 additions and 1 deletions
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4
lib/CodeGen/TwoAddressInstructionPass.cpp
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@ -330,8 +330,10 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
InstructionRearranged: InstructionRearranged:
const TargetRegisterClass* rc = MF.getRegInfo().getRegClass(regA); const TargetRegisterClass* rc = MF.getRegInfo().getRegClass(regA);
MachineInstr *Orig = MRI->getVRegDef(regB); MachineInstr *Orig = MRI->getVRegDef(regB);
bool SawStore = false;
if (EnableReMat && Orig && TII->isTriviallyReMaterializable(Orig)) { if (EnableReMat && Orig && Orig->isSafeToMove(TII, SawStore) &&
TII->isTriviallyReMaterializable(Orig)) {
TII->reMaterialize(*mbbi, mi, regA, Orig); TII->reMaterialize(*mbbi, mi, regA, Orig);
ReMattedInstrs.insert(Orig); ReMattedInstrs.insert(Orig);
} else { } else {