ptrmemfield.C: New testcase.

2008-07-05  Andrew Pinski  <andrew_pinski@playstation.sony.com>

        * g++.dg/tree-ssa/ptrmemfield.C: New testcase.

2008-07-05  Andrew Pinski  <andrew_pinski@playstation.sony.com>

        * fold-const.c (fold_convert_const): Treat OFFSET_TYPE the same as
        integral and pointer types.

From-SVN: r137510

gcc/ChangeLog

+2008-07-05  Andrew Pinski  <andrew_pinski@playstation.sony.com>
+
+	* fold-const.c (fold_convert_const): Treat OFFSET_TYPE the same as
+	integral and pointer types.
+
 2008-07-04  Roger Sayle  <roger@eyesopen.com>
 
 	* config/rs6000/host-darwin.c (darwin_rs6000_extra_siganls): Cast

gcc/fold-const.c

@@ -2396,7 +2396,8 @@ fold_convert_const (enum tree_code code, tree type, tree arg1)
   if (TREE_TYPE (arg1) == type)
     return arg1;
 
-  if (POINTER_TYPE_P (type) || INTEGRAL_TYPE_P (type))
+  if (POINTER_TYPE_P (type) || INTEGRAL_TYPE_P (type)
+      || TREE_CODE (type) == OFFSET_TYPE)
     {
       if (TREE_CODE (arg1) == INTEGER_CST)
 	return fold_convert_const_int_from_int (type, arg1);

gcc/testsuite/ChangeLog

+2008-07-05  Andrew Pinski  <andrew_pinski@playstation.sony.com>
+
+	* g++.dg/tree-ssa/ptrmemfield.C: New testcase.
+
 2008-07-05  Joseph Myers  <joseph@codesourcery.com>
 
 	* lib/gcc-dg.exp (remove-build-file): Remove files on remote host

gcc/testsuite/g++.dg/tree-ssa/ptrmemfield.C

+/* { dg-do compile } */
+// { dg-options "-O2 -fdump-tree-final_cleanup" }
+
+
+struct f
+{
+  char m;
+  char m1;
+};
+
+static inline char f:: *g(int a)
+{
+  return a?0:&f::m;
+}
+
+int h(void)
+{
+  char f:: *a = g(0);
+  return a == 0;
+}
+
+/* We should have no cast to offset_type. */
+/* { dg-final { scan-tree-dump-times "offset_type" 0 "final_cleanup"} } */
+// And we should optimized this code to just return 0
+/* { dg-final { scan-tree-dump-times "return 0" 1 "final_cleanup"} } */
+/* { dg-final { cleanup-tree-dump "final_cleanup" } } */
+