Require the containing type to be complete when we see

__alignof__ of a field.

This problem can only happen in C++11.

Also do some petty optimizations.

rdar://13784901

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181185 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/AST/ExprConstant.cpp b/lib/AST/ExprConstant.cpp
index 95bfd63f4d..2b9d13cec0 100644
--- a/lib/AST/ExprConstant.cpp
+++ b/lib/AST/ExprConstant.cpp
@@ -5915,6 +5915,10 @@ CharUnits IntExprEvaluator::GetAlignOfType(QualType T) {
 CharUnits IntExprEvaluator::GetAlignOfExpr(const Expr *E) {
   E = E->IgnoreParens();
 
+  // The kinds of expressions that we have special-case logic here for
+  // should be kept up to date with the special checks for those
+  // expressions in Sema.
+
   // alignof decl is always accepted, even if it doesn't make sense: we default
   // to 1 in those cases.
   if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))