diff options
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 58de94c9ef7..5fa7f73f57c 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -24850,13 +24850,7 @@ static SDValue PerformEXTRACT_VECTOR_ELTCombine(SDNode *N, SelectionDAG &DAG, if (InputVector.getOpcode() == ISD::BITCAST && InputVector.hasOneUse() && N->getValueType(0) == MVT::i32 && InputVector.getValueType() == MVT::v2i32) { - - // The bitcast source is a direct mmx result. SDValue MMXSrc = InputVector.getNode()->getOperand(0); - if (MMXSrc.getValueType() == MVT::x86mmx) - return DAG.getNode(X86ISD::MMX_MOVD2W, SDLoc(InputVector), - N->getValueType(0), - InputVector.getNode()->getOperand(0)); // The mmx is indirect: (i64 extract_elt (v1i64 bitcast (x86mmx ...))). if (MMXSrc.getOpcode() == ISD::EXTRACT_VECTOR_ELT && MMXSrc.hasOneUse() && @@ -27940,11 +27934,22 @@ static SDValue combineVectorTruncation(SDNode *N, SelectionDAG &DAG, static SDValue PerformTRUNCATECombine(SDNode *N, SelectionDAG &DAG, const X86Subtarget &Subtarget) { + + SDValue Src = N->getOperand(0); + // Try to detect AVG pattern first. - if (SDValue Avg = detectAVGPattern(N->getOperand(0), N->getValueType(0), DAG, + if (SDValue Avg = detectAVGPattern(Src, N->getValueType(0), DAG, Subtarget, SDLoc(N))) return Avg; + // The bitcast source is a direct mmx result. + // Detect bitcasts between i32 to x86mmx + if (Src.getOpcode() == ISD::BITCAST && N->getValueType(0) == MVT::i32) { + SDValue BCSrc = Src.getOperand(0); + if (BCSrc.getValueType() == MVT::x86mmx) + return DAG.getNode(X86ISD::MMX_MOVD2W, SDLoc(N), MVT::i32, BCSrc); + } + return combineVectorTruncation(N, DAG, Subtarget); } |
