From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Wed, 14 Sep 2016 17:04:22 +0000 (+0000)
Subject: [X86][SSE] Don't use PSHUFD directly - lower with generic shuffle
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e65dbf06208994775b04cdd83ce79b9abc3933aa;p=llvm

[X86][SSE] Don't use PSHUFD directly - lower with generic shuffle

Remove the last user of the old getTargetShuffleNode helpers

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@281499 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index b0101370022..75d8f35ee80 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -3848,21 +3848,6 @@ static bool isTargetShuffleVariableMask(unsigned Opcode) {
   }
 }
 
-static SDValue getTargetShuffleNode(unsigned Opc, const SDLoc &dl, MVT VT,
-                                    SDValue V1, unsigned TargetMask,
-                                    SelectionDAG &DAG) {
-  switch(Opc) {
-  default: llvm_unreachable("Unknown x86 shuffle node");
-  case X86ISD::PSHUFD:
-  case X86ISD::PSHUFHW:
-  case X86ISD::PSHUFLW:
-  case X86ISD::VPERMILPI:
-  case X86ISD::VPERMI:
-    return DAG.getNode(Opc, dl, VT, V1,
-                       DAG.getConstant(TargetMask, dl, MVT::i8));
-  }
-}
-
 SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) const {
   MachineFunction &MF = DAG.getMachineFunction();
   const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo();
@@ -13689,8 +13674,7 @@ SDValue X86TargetLowering::LowerUINT_TO_FP_i64(SDValue Op,
     Result = DAG.getNode(X86ISD::FHADD, dl, MVT::v2f64, Sub, Sub);
   } else {
     SDValue S2F = DAG.getBitcast(MVT::v4i32, Sub);
-    SDValue Shuffle = getTargetShuffleNode(X86ISD::PSHUFD, dl, MVT::v4i32,
-                                           S2F, 0x4E, DAG);
+    SDValue Shuffle = DAG.getVectorShuffle(MVT::v4i32, dl, S2F, S2F, {2,3,0,1});
     Result = DAG.getNode(ISD::FADD, dl, MVT::v2f64,
                          DAG.getBitcast(MVT::v2f64, Shuffle), Sub);
   }