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Broaden isSchedulingBoundary to check aliases of SP.

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On PPC the stack pointer is X1, but ADJCALLSTACK writes R1.

Fixes PR14315: Register regmask dependency problem with misched.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168248 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick
2012-11-17 03:35:11 +00:00
parent c37f502d48
commit e1f663933a
2 changed files with 35 additions and 1 deletions
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3
lib/CodeGen/TargetInstrInfoImpl.cpp
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@@ -472,7 +472,8 @@ bool TargetInstrInfoImpl::isSchedulingBoundary(const MachineInstr *MI,
// stack slot reference to depend on the instruction that does the
// modification.
const TargetLowering &TLI = *MF.getTarget().getTargetLowering();
if (MI->definesRegister(TLI.getStackPointerRegisterToSaveRestore()))
const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo();
if (MI->modifiesRegister(TLI.getStackPointerRegisterToSaveRestore(), TRI))
return true;
return false;