Special case handling two wide build_vector(0, x).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27961 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 1a11c32b3416567f61ee6cc8c937f00b12aebf2e..a03c92ae6d1a38f59c48d6b5669eaa607b9ab3e4 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -3236,10 +3236,6 @@ SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
     MVT::ValueType EVT = MVT::getVectorBaseType(VT);
     unsigned EVTBits = MVT::getSizeInBits(EVT);
 
-    // Let legalizer expand 2-widde build_vector's.
-    if (EVTBits == 64)
-      return SDOperand();
-
     unsigned NumElems = Op.getNumOperands();
     unsigned NumZero  = 0;
     unsigned NumNonZero = 0;
@@ -3291,6 +3287,10 @@ SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
       }
     }
 
+    // Let legalizer expand 2-widde build_vector's.
+    if (EVTBits == 64)
+      return SDOperand();
+
     // If element VT is < 32 bits, convert it to inserts into a zero vector.
     if (EVTBits == 8) {
       SDOperand V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG);