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[SelectionDAG] Replace a flag that can never be true with an assert.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@313847 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2017-09-21 00:18:46 +00:00
parent c712ae8c95
commit 1997c335b9
1 changed files with 2 additions and 3 deletions
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5
lib/CodeGen/SelectionDAG/TargetLowering.cpp
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@ -421,9 +421,8 @@ bool TargetLowering::ShrinkDemandedOp(SDValue Op, unsigned BitWidth,
Op.getOpcode(), dl, SmallVT,
DAG.getNode(ISD::TRUNCATE, dl, SmallVT, Op.getOperand(0)),
DAG.getNode(ISD::TRUNCATE, dl, SmallVT, Op.getOperand(1)));
bool NeedZext = DemandedSize > SmallVTBits;
SDValue Z = DAG.getNode(NeedZext ? ISD::ZERO_EXTEND : ISD::ANY_EXTEND,
dl, Op.getValueType(), X);
assert(DemandedSize <= SmallVTBits && "Narrowed below demanded bits?");
SDValue Z = DAG.getNode(ISD::ANY_EXTEND, dl, Op.getValueType(), X);
return TLO.CombineTo(Op, Z);
}
}