Index: lib/IR/ConstantFold.cpp
===================================================================
--- lib/IR/ConstantFold.cpp
+++ lib/IR/ConstantFold.cpp
@@ -534,7 +534,8 @@
 
   // If the cast operand is a constant expression, there's a few things we can
   // do to try to simplify it.
-  if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
+  ConstantExpr *CE = dyn_cast<ConstantExpr>(V);
+  if (CE && !DestTy->isVectorTy()) {
     if (CE->isCast()) {
       // Try hard to fold cast of cast because they are often eliminable.
       if (unsigned newOpc = foldConstantCastPair(opc, CE, DestTy))
Index: test/Transforms/LoopVectorize/X86/constant-fold.ll
===================================================================
--- test/Transforms/LoopVectorize/X86/constant-fold.ll
+++ test/Transforms/LoopVectorize/X86/constant-fold.ll
@@ -2,7 +2,6 @@
 ; RUN: opt -loop-vectorize -S -mtriple=x86_64-- -o - %s | FileCheck %s
 
 ; Testcase that point out faulty bitcast that cast between different sizes.
-; See "bitcast ([1 x %rec8]* @a to <2 x i16*>)" in checks below
 
 %rec8 = type { i16 }
 
@@ -28,7 +27,7 @@
 ; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr [2 x i16*], [2 x i16*]* @b, i16 0, i64 [[TMP2]]
 ; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr i16*, i16** [[TMP3]], i32 0
 ; CHECK-NEXT:    [[TMP5:%.*]] = bitcast i16** [[TMP4]] to <2 x i16*>*
-; CHECK-NEXT:    store <2 x i16*> bitcast ([1 x %rec8]* @a to <2 x i16*>), <2 x i16*>* [[TMP5]], align 8
+; CHECK-NEXT:    store <2 x i16*> <i16* getelementptr inbounds (%rec8, %rec8* extractelement (<2 x %rec8*> getelementptr ([1 x %rec8], [1 x %rec8]* @a, <2 x i16> zeroinitializer, <2 x i64> zeroinitializer), i32 0), i32 0, i32 0), i16* getelementptr inbounds (%rec8, %rec8* extractelement (<2 x %rec8*> getelementptr ([1 x %rec8], [1 x %rec8]* @a, <2 x i16> zeroinitializer, <2 x i64> zeroinitializer), i32 1), i32 0, i32 0)>, <2 x i16*>* [[TMP5]], align 8
 ; CHECK-NEXT:    [[INDEX_NEXT]] = add i32 [[INDEX]], 2
 ; CHECK-NEXT:    [[TMP6:%.*]] = icmp eq i32 [[INDEX_NEXT]], 2
 ; CHECK-NEXT:    br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop !0