diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 55912a2..f99bafd 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -30412,9 +30412,22 @@ static SDValue combineBitcast(SDNode *N, SelectionDAG &DAG, // (i16 movmsk (16i8 sext (v16i1 x))) // before the setcc result is scalarized on subtargets that don't have legal // vxi1 types. - if (DCI.isBeforeLegalize()) + if (DCI.isBeforeLegalize()) { if (SDValue V = combineBitcastvxi1(DAG, SDValue(N, 0), Subtarget)) return V; + + // If this is a bitcast between a MVT::v4i1/v2i1 and an illegal integer + // type, widen both sides to avoid a trip through memory. + if ((VT == MVT::v4i1 || VT == MVT::v2i1) && SrcVT.isScalarInteger() && + Subtarget.hasVLX()) { + SDLoc dl(N); + N0 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i8, N0); + N0 = DAG.getBitcast(MVT::v8i1, N0); + return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, N0, + DAG.getIntPtrConstant(0, dl)); + } + } + // Since MMX types are special and don't usually play with other vector types, // it's better to handle them early to be sure we emit efficient code by // avoiding store-load conversions. |