diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -2202,7 +2202,7 @@
   if (MaxAlign == 16)
     return;
   if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
-    if (VTy->getBitWidth() == 128)
+    if (VTy->getPrimitiveSizeInBits().getFixedSize() == 128)
       MaxAlign = 16;
   } else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
     unsigned EltAlign = 0;