From cff7cd18ab8acac8a4762ec7f7949c009076833d Mon Sep 17 00:00:00 2001 From: Bruno Cardoso Lopes Date: Sat, 4 Sep 2010 02:02:14 +0000 Subject: Emit target specific nodes to handle splats starting at zero indicies llvm-svn: 113055 --- llvm/lib/Target/X86/X86ISelLowering.cpp | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'llvm/lib') diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 95dbb617668..f7b8100f70e 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -5470,10 +5470,17 @@ X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const { // FIXME: pshufb, blends, shifts. if (VT.getVectorNumElements() == 2 || - ShuffleVectorSDNode::isSplatMask(&M[0], VT) || isPALIGNRMask(M, VT, Subtarget->hasSSSE3())) return Op; + if (ShuffleVectorSDNode::isSplatMask(&M[0], VT) && + SVOp->getSplatIndex() == 0 && V2IsUndef) { + if (VT == MVT::v2f64) + return getTargetShuffleNode(X86ISD::UNPCKLPD, dl, VT, V1, V1, DAG); + if (VT == MVT::v2i64) + return getTargetShuffleNode(X86ISD::PUNPCKLQDQ, dl, VT, V1, V1, DAG); + } + if (isPSHUFHWMask(M, VT)) return getTargetShuffleNode(X86ISD::PSHUFHW, dl, VT, V1, X86::getShufflePSHUFHWImmediate(SVOp), -- cgit v1.2.3