re PR middle-end/46844 (regrename.c:312:22: error: unused parameter 'reg')

2010-12-09  Richard Guenther  <rguenther@suse.de>

	PR middle-end/46844
	* gimple-fold.c (canonicalize_constructor_val): Canonicalize
	addresses.

	* gcc.c-torture/compile/pr46866.c: New testcase.

From-SVN: r167649

gcc/ChangeLog

+2010-12-09  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/46844
+	* gimple-fold.c (canonicalize_constructor_val): Canonicalize
+	addresses.
+
 2010-12-09  Joseph Myers  <joseph@codesourcery.com>
 
 	* config/i386/netware.h (TARGET_POSIX_IO): Define.

gcc/gimple-fold.c

@@ -132,6 +132,10 @@ canonicalize_constructor_val (tree cval)
 	return NULL_TREE;
       if (base && TREE_CODE (base) == VAR_DECL)
 	add_referenced_var (base);
+      /* We never have the chance to fixup types in global initializers
+         during gimplification.  Do so here.  */
+      if (TREE_TYPE (TREE_TYPE (cval)) != TREE_TYPE (TREE_OPERAND (cval, 0)))
+	cval = build_fold_addr_expr (TREE_OPERAND (cval, 0));
     }
   return cval;
 }

gcc/testsuite/ChangeLog

+2010-12-09  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/46844
+	* gcc.c-torture/compile/pr46866.c: New testcase.
+
 2010-12-09  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	PR testsuite/45068

gcc/testsuite/gcc.c-torture/compile/pr46866.c

+extern void *malloc(__SIZE_TYPE__);
+typedef struct T T;
+struct T {
+    void (*destroy)(void *);
+};
+void destroy(union { void *this; } __attribute__((transparent_union)));
+static const typeof(destroy) *_destroy  = (const typeof(destroy)*)destroy;
+void destroy(void *this);
+static T *create_empty(void)
+{
+  T *this = malloc(sizeof(*this));
+  *this = (typeof(*this)){ _destroy };
+  return this;
+}
+void openssl_crl_load(void)
+{
+  T *this = create_empty();
+  destroy(this);
+}