[X86] Remove some dead code and combine some repeated code that's left.

If the width is 256 bits, then we must have AVX so the else here
was unnecessary. Once that's removed then the >= 256 bit code is
identical to the 128 bit code with a different VT so combine them.

llvm-svn: 368956

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 4b7929e29f7d5e30dda14450f599a9c3ae04e31d..c1655474fd22bd28a56e8dc45da798e82fdd0682 100644 (file)
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -9520,23 +9520,9 @@ X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
       // it to i32 first.
       if (EltVT == MVT::i16 || EltVT == MVT::i8) {
         Item = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Item);
-        if (VT.getSizeInBits() >= 256) {
-          MVT ShufVT = MVT::getVectorVT(MVT::i32, VT.getSizeInBits()/32);
-          if (Subtarget.hasAVX()) {
-            Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, ShufVT, Item);
-            Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
-          } else {
-            // Without AVX, we need to extend to a 128-bit vector and then
-            // insert into the 256-bit vector.
-            Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32, Item);
-            SDValue ZeroVec = getZeroVector(ShufVT, Subtarget, DAG, dl);
-            Item = insert128BitVector(ZeroVec, Item, 0, DAG, dl);
-          }
-        } else {
-          assert(VT.is128BitVector() && "Expected an SSE value type!");
-          Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32, Item);
-          Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
-        }
+        MVT ShufVT = MVT::getVectorVT(MVT::i32, VT.getSizeInBits()/32);
+        Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, ShufVT, Item);
+        Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
         return DAG.getBitcast(VT, Item);
       }
     }