re PR middle-end/23369 (build_range_check generates wrong code for funcptr comparison)

	PR middle-end/23369
	* fold-const.c (build_range_check): Disable optimization for function
	pointer expressions on targets that require function pointer
	canonicalization.

From-SVN: r103145

gcc/ChangeLog

+2005-08-15  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
+
+	PR middle-end/23369
+	* fold-const.c (build_range_check): Disable optimization for function
+	pointer expressions on targets that require function pointer
+	canonicalization.
+
 2005-08-15  Ulrich Weigand  <uweigand@de.ibm.com>
 
 	* simplify-rtx.c (simplify_const_relational_operation): When

gcc/fold-const.c

@@ -3929,6 +3929,15 @@ build_range_check (tree type, tree exp, int in_p, tree low, tree high)
   tree etype = TREE_TYPE (exp);
   tree value;
 
+#ifdef HAVE_canonicalize_funcptr_for_compare
+  /* Disable this optimization for function pointer expressions
+     on targets that require function pointer canonicalization.  */
+  if (HAVE_canonicalize_funcptr_for_compare
+      && TREE_CODE (etype) == POINTER_TYPE
+      && TREE_CODE (TREE_TYPE (etype)) == FUNCTION_TYPE)
+    return NULL_TREE;
+#endif
+
   if (! in_p)
     {
       value = build_range_check (type, exp, 1, low, high);