[llvm] r343377 - [X86] getTargetConstantBitsFromNode - fix self-move assertions from gcc builds due to rL343375
Simon Pilgrim via llvm-commits
llvm-commits at lists.llvm.org
Sat Sep 29 07:51:10 PDT 2018
Author: rksimon
Date: Sat Sep 29 07:51:09 2018
New Revision: 343377
URL: http://llvm.org/viewvc/llvm-project?rev=343377&view=rev
Log:
[X86] getTargetConstantBitsFromNode - fix self-move assertions from gcc builds due to rL343375
Modified:
llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=343377&r1=343376&r2=343377&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Sat Sep 29 07:51:09 2018
@@ -5748,11 +5748,15 @@ static bool getTargetConstantBitsFromNod
if (getTargetConstantBitsFromNode(Op.getOperand(0), EltSizeInBits,
UndefElts, EltBits, AllowWholeUndefs,
AllowPartialUndefs)) {
+ EVT SrcVT = Op.getOperand(0).getValueType();
+ unsigned NumSrcElts = SrcVT.getVectorNumElements();
unsigned NumSubElts = VT.getVectorNumElements();
unsigned BaseIdx = Op.getConstantOperandVal(1);
UndefElts = UndefElts.extractBits(NumSubElts, BaseIdx);
- EltBits.erase(EltBits.begin() + BaseIdx + NumSubElts, EltBits.end());
- EltBits.erase(EltBits.begin(), EltBits.begin() + BaseIdx);
+ if ((BaseIdx + NumSubElts) != NumSrcElts)
+ EltBits.erase(EltBits.begin() + BaseIdx + NumSubElts, EltBits.end());
+ if (BaseIdx != 0)
+ EltBits.erase(EltBits.begin(), EltBits.begin() + BaseIdx);
return true;
}
}
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