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Can't introduce floating-point immediate constants after legalization.

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Radar 9056407.

llvm-svn: 126864
This commit is contained in:
Stuart Hastings 2011-03-02 19:36:30 +00:00
parent c557d1eeb4
commit a40e563e4e
1 changed files with 6 additions and 2 deletions
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8
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -5142,7 +5142,9 @@ SDValue DAGCombiner::visitSINT_TO_FP(SDNode *N) {
EVT OpVT = N0.getValueType();
// fold (sint_to_fp c1) -> c1fp
if (N0C && OpVT != MVT::ppcf128)
if (N0C && OpVT != MVT::ppcf128 &&
// ...but only if the target supports immediate floating-point values
(Level == llvm::Unrestricted || TLI.isOperationLegalOrCustom(llvm::ISD::ConstantFP, VT)))
return DAG.getNode(ISD::SINT_TO_FP, N->getDebugLoc(), VT, N0);
// If the input is a legal type, and SINT_TO_FP is not legal on this target,
@ -5164,7 +5166,9 @@ SDValue DAGCombiner::visitUINT_TO_FP(SDNode *N) {
EVT OpVT = N0.getValueType();
// fold (uint_to_fp c1) -> c1fp
if (N0C && OpVT != MVT::ppcf128)
if (N0C && OpVT != MVT::ppcf128 &&
// ...but only if the target supports immediate floating-point values
(Level == llvm::Unrestricted || TLI.isOperationLegalOrCustom(llvm::ISD::ConstantFP, VT)))
return DAG.getNode(ISD::UINT_TO_FP, N->getDebugLoc(), VT, N0);
// If the input is a legal type, and UINT_TO_FP is not legal on this target,