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DAGCombine: always constant fold FMA when target disable FP exceptions

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Summary: When trying to constant fold an FMA in the DAG, getNode()
fails to fold the FMA if an operand is not finite. In this case this
patch allows the constant folding if !TLI->hasFloatingPointExceptions()

Reviewers: resistor

Reviewed By: resistor

Subscribers: hfinkel, llvm-commits

Differential Revision: http://reviews.llvm.org/D6912

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 226901
This commit is contained in:
Mehdi Amini 2015-01-23 07:07:20 +00:00
parent 25dc17847a
commit 8d442c114d
1 changed files with 1 additions and 1 deletions
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2
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -3620,7 +3620,7 @@ SDValue SelectionDAG::getNode(unsigned Opcode, SDLoc DL, EVT VT,
const APFloat &V3 = N3CFP->getValueAPF();
APFloat::opStatus s =
V1.fusedMultiplyAdd(V2, V3, APFloat::rmNearestTiesToEven);
if (s != APFloat::opInvalidOp)
if (!TLI->hasFloatingPointExceptions() || s != APFloat::opInvalidOp)
return getConstantFP(V1, VT);
}
break;