[cfe-commits] r65105 - in /cfe/trunk: lib/AST/ExprConstant.cpp test/Sema/const-eval.c

[Eli Friedman]

Author: efriedma
Date: Thu Feb 19 19:57:15 2009
New Revision: 65105

URL: http://llvm.org/viewvc/llvm-project?rev=65105&view=rev
Log:
Add support for * (unary dereference) operator to ExprConstant.


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=65105&r1=65104&r2=65105&view=diff

==============================================================================
--- cfe/trunk/lib/AST/ExprConstant.cpp (original)
+++ cfe/trunk/lib/AST/ExprConstant.cpp Thu Feb 19 19:57:15 2009
@@ -157,6 +157,7 @@
   APValue VisitMemberExpr(MemberExpr *E);
   APValue VisitStringLiteral(StringLiteral *E) { return APValue(E, 0); }
   APValue VisitArraySubscriptExpr(ArraySubscriptExpr *E);
+  APValue VisitUnaryDeref(UnaryOperator *E);
 };
 } // end anonymous namespace
 
@@ -234,6 +235,14 @@
   return Result;
 }
 
+APValue LValueExprEvaluator::VisitUnaryDeref(UnaryOperator *E)
+{
+  APValue Result;
+  if (!EvaluatePointer(E->getSubExpr(), Result, Info))
+    return APValue();
+  return Result;
+}
+
 //===----------------------------------------------------------------------===//
 // Pointer Evaluation
 //===----------------------------------------------------------------------===//

Modified: cfe/trunk/test/Sema/const-eval.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/const-eval.c?rev=65105&r1=65104&r2=65105&view=diff

==============================================================================
--- cfe/trunk/test/Sema/const-eval.c (original)
+++ cfe/trunk/test/Sema/const-eval.c Thu Feb 19 19:57:15 2009
@@ -38,3 +38,5 @@
 struct s {
   int a[(int)-1.0f]; // expected-error {{array size is negative}}
 };
+
+EVAL_EXPR(19, ((int)&*(char*)10 == 10 ? 1 : -1));