diff options
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 91da4c0b6c..a5eb00a60a 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -1578,7 +1578,7 @@ static bool isUndefOrEqual(SDOperand Op, unsigned Val) { bool X86::isPSHUFDMask(SDNode *N) { assert(N->getOpcode() == ISD::BUILD_VECTOR); - if (N->getNumOperands() != 4) + if (N->getNumOperands() != 2 && N->getNumOperands() != 4) return false; // Check if the value doesn't reference the second vector. @@ -1586,7 +1586,7 @@ bool X86::isPSHUFDMask(SDNode *N) { SDOperand Arg = N->getOperand(i); if (Arg.getOpcode() == ISD::UNDEF) continue; assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!"); - if (cast<ConstantSDNode>(Arg)->getValue() >= 4) + if (cast<ConstantSDNode>(Arg)->getValue() >= e) return false; } @@ -2767,7 +2767,10 @@ X86TargetLowering::LowerVECTOR_SHUFFLE(SDOperand Op, SelectionDAG &DAG) { // If VT is integer, try PSHUF* first, then SHUFP*. if (MVT::isInteger(VT)) { - if (X86::isPSHUFDMask(PermMask.Val) || + // MMX doesn't have PSHUFD; it does have PSHUFW. While it's theoretically + // possible to shuffle a v2i32 using PSHUFW, that's not yet implemented. + if (((MVT::getSizeInBits(VT) != 64 || NumElems == 4) && + X86::isPSHUFDMask(PermMask.Val)) || X86::isPSHUFHWMask(PermMask.Val) || X86::isPSHUFLWMask(PermMask.Val)) { if (V2.getOpcode() != ISD::UNDEF) |