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No need recognize load from a fixed argument slot as re-materializable. LiveIntervalAnalysis already handles it as a special case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47522 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -760,18 +760,6 @@ bool X86InstrInfo::isReallyTriviallyReMaterializable(MachineInstr *MI) const {
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return isPICBase;
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}
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// If this is a load from a fixed argument slot, we know the value is
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// invariant across the whole function, because we don't redefine argument
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// values.
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#if 0
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// FIXME: This is disabled due to a remat bug. rdar://5671644
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if (MI->getOperand(1).isFI()) {
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const MachineFrameInfo &MFI=*MI->getParent()->getParent()->getFrameInfo();
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int Idx = MI->getOperand(1).getIndex();
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return MFI.isFixedObjectIndex(Idx) && MFI.isImmutableObjectIndex(Idx);
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}
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#endif
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return false;
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}
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// All other instructions marked M_REMATERIALIZABLE are always trivially
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