[cfe-commits] r59939 - in /cfe/trunk: lib/AST/ExprConstant.cpp test/Sema/const-eval.c

[Anders Carlsson]

Author: andersca
Date: Sun Nov 23 22:41:22 2008
New Revision: 59939

URL: http://llvm.org/viewvc/llvm-project?rev=59939&view=rev
Log:
The address of a variable is only constant if the variable has global storage.

Modified:
    cfe/trunk/lib/AST/ExprConstant.cpp
    cfe/trunk/test/Sema/const-eval.c

Modified: cfe/trunk/lib/AST/ExprConstant.cpp
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/ExprConstant.cpp?rev=59939&r1=59938&r2=59939&view=diff

==============================================================================
--- cfe/trunk/lib/AST/ExprConstant.cpp (original)
+++ cfe/trunk/lib/AST/ExprConstant.cpp Sun Nov 23 22:41:22 2008
@@ -121,7 +121,7 @@
   }
 
   APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); }
-  APValue VisitDeclRefExpr(DeclRefExpr *E) { return APValue(E, 0); }
+  APValue VisitDeclRefExpr(DeclRefExpr *E);
   APValue VisitPredefinedExpr(PredefinedExpr *E) { return APValue(E, 0); }
   APValue VisitCompoundLiteralExpr(CompoundLiteralExpr *E);
   APValue VisitMemberExpr(MemberExpr *E);
@@ -135,6 +135,14 @@
   return Result.isLValue();
 }
 
+APValue LValueExprEvaluator::VisitDeclRefExpr(DeclRefExpr *E)
+{ 
+  if (!E->hasGlobalStorage())
+    return APValue();
+  
+  return APValue(E, 0); 
+}
+
 APValue LValueExprEvaluator::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
   if (E->isFileScope())
     return APValue(E, 0);

Modified: cfe/trunk/test/Sema/const-eval.c
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/const-eval.c?rev=59939&r1=59938&r2=59939&view=diff

==============================================================================
--- cfe/trunk/test/Sema/const-eval.c (original)
+++ cfe/trunk/test/Sema/const-eval.c Sun Nov 23 22:41:22 2008
@@ -20,3 +20,9 @@
 
 unsigned int l_19 = 1;
 EVAL_EXPR(14, (1 ^ l_19) && 1); // expected-error {{fields must have a 
constant size}}
+
+void f()
+{
+  int a;
+  EVAL_EXPR(15, (_Bool)&a); // expected-error {{fields must have a constant 
size}}
+}


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