When computing the alignof value for a vector type, ensure that

the alignment is a power of 2, even in the esoteric case of a
vector element which does not have a power-of-2 sizeof value.

llvm-svn: 102036

Author: Dan Gohman

clang/lib/AST/ASTContext.cpp

@@ -515,7 +515,7 @@ ASTContext::getTypeInfo(const Type *T) {
     Align = Width;
     // If the alignment is not a power of 2, round up to the next power of 2.
     // This happens for non-power-of-2 length vectors.
-    if (VT->getNumElements() & (VT->getNumElements()-1)) {
+    if (Align & (Align-1)) {
       Align = llvm::NextPowerOf2(Align);
       Width = llvm::RoundUpToAlignment(Width, Align);
     }