Remove the 128-bit special handling from SCALAR_TO_VECTOR. This isn't

the way to go. Doing this here will prevent several node matches later,
and would have to force looking all the way through several
VINSERTF128/VEXTRACTF128 chains to optimize simple things.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135730 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index c46ccf5ea4c3c3d66580c72ab3f7a0408082679e..1aea17524cf7ea00163f074c1638efece77c397f 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -983,7 +983,6 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
       setOperationAction(ISD::VECTOR_SHUFFLE,     SVT, Custom);
       setOperationAction(ISD::INSERT_VECTOR_ELT,  SVT, Custom);
       setOperationAction(ISD::EXTRACT_VECTOR_ELT, SVT, Custom);
-      setOperationAction(ISD::SCALAR_TO_VECTOR,   SVT, Custom);
       setOperationAction(ISD::INSERT_SUBVECTOR,   SVT, Custom);
     }
 
@@ -6339,26 +6338,9 @@ X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const {
 
 SDValue
 X86TargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) const {
-  LLVMContext *Context = DAG.getContext();
   DebugLoc dl = Op.getDebugLoc();
   EVT OpVT = Op.getValueType();
 
-  // If this is a 256-bit vector result, first insert into a 128-bit
-  // vector and then insert into the 256-bit vector.
-  if (OpVT.getSizeInBits() > 128) {
-    // Insert into a 128-bit vector.
-    EVT VT128 = EVT::getVectorVT(*Context,
-                                 OpVT.getVectorElementType(),
-                                 OpVT.getVectorNumElements() / 2);
-
-    Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT128, Op.getOperand(0));
-
-    // Insert the 128-bit vector.
-    return Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, OpVT), Op,
-                              DAG.getConstant(0, MVT::i32),
-                              DAG, dl);
-  }
-
   if (Op.getValueType() == MVT::v1i64 &&
       Op.getOperand(0).getValueType() == MVT::i64)
     return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v1i64, Op.getOperand(0));