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| author | Bruno Cardoso Lopes <bruno.cardoso@gmail.com> | 2010-09-04 02:58:56 +0000 |
|---|---|---|
| committer | Bruno Cardoso Lopes <bruno.cardoso@gmail.com> | 2010-09-04 02:58:56 +0000 |
| commit | 2eb63dfa0a618fe58b9335ceb4e2b67ab5c9f679 (patch) | |
| tree | 4325c528a20a2cc08bc9a4e35aceb6c01474f85d /lib/Target/X86/X86ISelLowering.cpp | |
| parent | 828f6ae03c214609fec1fce8cd32f4fcf2645f57 (diff) | |
| download | external_llvm-2eb63dfa0a618fe58b9335ceb4e2b67ab5c9f679.zip external_llvm-2eb63dfa0a618fe58b9335ceb4e2b67ab5c9f679.tar.gz external_llvm-2eb63dfa0a618fe58b9335ceb4e2b67ab5c9f679.tar.bz2 | |
Remove the last bit of isShuffleMaskLegal checks and improve the comment regarding mmx shuffles
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113059 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 147f201..974d9eb 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -5472,14 +5472,12 @@ X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const { X86::getShufflePALIGNRImmediate(SVOp), DAG); - // MMX shuffles not already handled must be expanded. + // Only a few shuffle masks are handled for 64-bit vectors (MMX), and + // 64-bit vectors which made to this point can't be handled, they are + // expanded. if (VT.getSizeInBits() == 64) return SDValue(); - // FIXME: pshufb, blends, shifts. - if (VT.getVectorNumElements() == 2) - return Op; - if (ShuffleVectorSDNode::isSplatMask(&M[0], VT) && SVOp->getSplatIndex() == 0 && V2IsUndef) { if (VT == MVT::v2f64) |