Can't introduce floating-point immediate constants after legalization.
Radar 9056407.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126864 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 7957098..4c70bc3 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -5142,7 +5142,9 @@
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 @@
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,