1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index a3973ed963f..f73b9d64b94 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -6630,9 +6630,12 @@ X86TargetLowering::lowerVectorIntExtend(SDValue Op, SelectionDAG &DAG) const {
         .getOperand(0).getValueType().getSizeInBits() == SignificantBits) {
     // (bitcast (sclr2vec (ext_vec_elt x))) -> (bitcast x)
     SDValue V = V1.getOperand(0).getOperand(0).getOperand(0);
+    ConstantSDNode *CIdx =
+      dyn_cast<ConstantSDNode>(V1.getOperand(0).getOperand(0).getOperand(1));
     // If it's foldable, i.e. normal load with single use, we will let code
     // selection to fold it. Otherwise, we will short the conversion sequence.
-    if (!ISD::isNormalLoad(V.getNode()) || !V.hasOneUse())
+    if (CIdx && CIdx->getZExtValue() == 0 &&
+        (!ISD::isNormalLoad(V.getNode()) || !V.hasOneUse()))
       V1 = DAG.getNode(ISD::BITCAST, DL, V1.getValueType(), V);
   }