diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 26d21d55ba6..14880e40881 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -16737,13 +16737,11 @@ static SDValue LowerUINT_TO_FP_i64(SDValue Op, SelectionDAG &DAG, SDValue Result; if (Subtarget.hasSSE3()) { - // FIXME: The 'haddpd' instruction may be slower than 'movhlps + addsd'. + // FIXME: The 'haddpd' instruction may be slower than 'shuffle + addsd'. Result = DAG.getNode(X86ISD::FHADD, dl, MVT::v2f64, Sub, Sub); } else { - SDValue S2F = DAG.getBitcast(MVT::v4i32, Sub); - SDValue Shuffle = DAG.getVectorShuffle(MVT::v4i32, dl, S2F, S2F, {2,3,0,1}); - Result = DAG.getNode(ISD::FADD, dl, MVT::v2f64, - DAG.getBitcast(MVT::v2f64, Shuffle), Sub); + SDValue Shuffle = DAG.getVectorShuffle(MVT::v2f64, dl, Sub, Sub, {1,-1}); + Result = DAG.getNode(ISD::FADD, dl, MVT::v2f64, Shuffle, Sub); } return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Result, |
