Revert r112942, "Use punpckh and unpckh family of nodes instead of using unpckh

mask pattern fragment", which depends on r112934, which introduced some infinite
loop and select failures.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112998 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 96238a0..216ad10 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -2609,11 +2609,9 @@ static bool isTargetShuffle(unsigned Opcode) {
   case X86ISD::PUNPCKLDQ:
   case X86ISD::PUNPCKLQDQ:
   case X86ISD::UNPCKHPS:
-  case X86ISD::UNPCKHPD:
   case X86ISD::PUNPCKHWD:
   case X86ISD::PUNPCKHBW:
   case X86ISD::PUNPCKHDQ:
-  case X86ISD::PUNPCKHQDQ:
     return true;
   }
   return false;
@@ -2674,11 +2672,9 @@ static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
   case X86ISD::PUNPCKLDQ:
   case X86ISD::PUNPCKLQDQ:
   case X86ISD::UNPCKHPS:
-  case X86ISD::UNPCKHPD:
   case X86ISD::PUNPCKHWD:
   case X86ISD::PUNPCKHBW:
   case X86ISD::PUNPCKHDQ:
-  case X86ISD::PUNPCKHQDQ:
     return DAG.getNode(Opc, dl, VT, V1, V2);
   }
   return SDValue();
@@ -5227,20 +5223,6 @@ static unsigned getUNPCKLOpcode(EVT VT) {
   return 0;
 }
 
-static unsigned getUNPCKHOpcode(EVT VT) {
-  switch(VT.getSimpleVT().SimpleTy) {
-  case MVT::v4i32: return X86ISD::PUNPCKHDQ;
-  case MVT::v2i64: return X86ISD::PUNPCKHQDQ;
-  case MVT::v4f32: return X86ISD::UNPCKHPS;
-  case MVT::v2f64: return X86ISD::UNPCKHPD;
-  case MVT::v16i8: return X86ISD::PUNPCKHBW;
-  case MVT::v8i16: return X86ISD::PUNPCKHWD;
-  default:
-    llvm_unreachable("Unknow type for unpckh");
-  }
-  return 0;
-}
-
 SDValue
 X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
   ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
@@ -5431,8 +5413,7 @@ X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
       Op : getTargetShuffleNode(getUNPCKLOpcode(VT), dl, VT, V1, V2, DAG);
 
   if (X86::isUNPCKHMask(SVOp))
-    return (isMMX) ?
-      Op : getTargetShuffleNode(getUNPCKHOpcode(VT), dl, VT, V1, V2, DAG);
+    return Op;
 
   if (V2IsSplat) {
     // Normalize mask so all entries that point to V2 points to its first
@@ -5457,11 +5438,10 @@ X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
 
     if (X86::isUNPCKLMask(NewSVOp))
       return (isMMX) ?
-        NewOp : getTargetShuffleNode(getUNPCKLOpcode(VT), dl, VT, V2, V1, DAG);
+        Op : getTargetShuffleNode(getUNPCKLOpcode(VT), dl, VT, V2, V1, DAG);
 
     if (X86::isUNPCKHMask(NewSVOp))
-      return (isMMX) ?
-        NewOp : getTargetShuffleNode(getUNPCKHOpcode(VT), dl, VT, V2, V1, DAG);
+      return NewOp;
   }
 
   // FIXME: for mmx, bitcast v2i32 to v4i16 for shuffle.