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Fix both the test for zero and what we do if we have a zero for

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umulo legalization.

Fixes PR13839

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163856 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2012-09-13 23:24:02 +00:00
parent 331f64cd0d
commit ffaf69b8b1
2 changed files with 54 additions and 1 deletions
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5
lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
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@@ -2265,12 +2265,15 @@ void DAGTypeLegalizer::ExpandIntRes_XMULO(SDNode *N,
// A divide for UMULO will be faster than a function call. Select to
// make sure we aren't using 0.
SDValue isZero = DAG.getSetCC(dl, TLI.getSetCCResultType(VT),
RHS, DAG.getConstant(0, VT), ISD::SETNE);
RHS, DAG.getConstant(0, VT), ISD::SETEQ);
SDValue NotZero = DAG.getNode(ISD::SELECT, dl, VT, isZero,
DAG.getConstant(1, VT), RHS);
SDValue DIV = DAG.getNode(ISD::UDIV, dl, VT, MUL, NotZero);
SDValue Overflow = DAG.getSetCC(dl, N->getValueType(1), DIV, LHS,
ISD::SETNE);
Overflow = DAG.getNode(ISD::SELECT, dl, N->getValueType(1), isZero,
DAG.getConstant(0, N->getValueType(1)),
Overflow);
ReplaceValueWith(SDValue(N, 1), Overflow);
return;
}