tree.h (can_trust_pointer_alignment): Remove.

2011-08-10  Richard Guenther  <rguenther@suse.de>

	* tree.h (can_trust_pointer_alignment): Remove.
	* builtins.c (can_trust_pointer_alignment): Remove.

	cp/
	* call.c (build_over_call): Call memcpy unconditionally.

From-SVN: r177625

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7d5b492..a727916 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2011-08-10  Richard Guenther  <rguenther@suse.de>
+
+       * tree.h (can_trust_pointer_alignment): Remove.
+       * builtins.c (can_trust_pointer_alignment): Remove.
+
 2011-08-10  Artjoms Sinkarovs <artyom.shinakroff@gmail.com>
 
        * c-typeck.c (scalar_to_vector): New function. Try scalar to

diff --git a/gcc/builtins.c b/gcc/builtins.c
index 723e07f..6c16821 100644 (file)
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -453,16 +453,6 @@ get_object_alignment (tree exp)
   return align;
 }
 
-/* Returns true iff we can trust that alignment information has been
-   calculated properly.  */
-
-bool
-can_trust_pointer_alignment (void)
-{
-  /* We rely on TER to compute accurate alignment information.  */
-  return (optimize && flag_tree_ter);
-}
-
 /* Return the alignment in bits of EXP, a pointer valued expression.
    The alignment returned is, by default, the alignment of the thing that
    EXP points to.  If it is not a POINTER_TYPE, 0 is returned.

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 65a2701..be846ce 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,7 @@
+2011-08-10  Richard Guenther  <rguenther@suse.de>
+
+       * call.c (build_over_call): Call memcpy unconditionally.
+
 2011-08-08  Jason Merrill  <jason@redhat.com>
 
        PR c++/50020

diff --git a/gcc/cp/call.c b/gcc/cp/call.c
index b0133e2..4494ecc 100644 (file)
--- a/gcc/cp/call.c
+++ b/gcc/cp/call.c
@@ -6767,33 +6767,17 @@ build_over_call (struct z_candidate *cand, int flags, tsubst_flags_t complain)
       else
        {
          /* We must only copy the non-tail padding parts.
-            Use __builtin_memcpy for the bitwise copy.
-            FIXME fix 22488 so we can go back to using MODIFY_EXPR
-            instead of an explicit call to memcpy.  */
-       
+            Use __builtin_memcpy for the bitwise copy.  */
          tree arg0, arg1, arg2, t;
-         tree test = NULL_TREE;
 
          arg2 = TYPE_SIZE_UNIT (as_base);
          arg1 = arg;
          arg0 = cp_build_addr_expr (to, complain);
 
-         if (!can_trust_pointer_alignment ())
-           {
-             /* If we can't be sure about pointer alignment, a call
-                to __builtin_memcpy is expanded as a call to memcpy, which
-                is invalid with identical args.  Otherwise it is
-                expanded as a block move, which should be safe.  */
-             arg0 = save_expr (arg0);
-             arg1 = save_expr (arg1);
-             test = build2 (EQ_EXPR, boolean_type_node, arg0, arg1);
-           }
          t = implicit_built_in_decls[BUILT_IN_MEMCPY];
          t = build_call_n (t, 3, arg0, arg1, arg2);
 
          t = convert (TREE_TYPE (arg0), t);
-         if (test)
-           t = build3 (COND_EXPR, TREE_TYPE (t), test, arg0, t);
          val = cp_build_indirect_ref (t, RO_NULL, complain);
           TREE_NO_WARNING (val) = 1;
        }

diff --git a/gcc/tree.h b/gcc/tree.h
index 2fa5999..c8d292a 100644 (file)
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -5358,7 +5358,6 @@ extern tree build_va_arg_indirect_ref (tree);
 extern tree build_string_literal (int, const char *);
 extern bool validate_arglist (const_tree, ...);
 extern rtx builtin_memset_read_str (void *, HOST_WIDE_INT, enum machine_mode);
-extern bool can_trust_pointer_alignment (void);
 extern bool is_builtin_name (const char *);
 extern bool is_builtin_fn (tree);
 extern unsigned int get_object_alignment_1 (tree, unsigned HOST_WIDE_INT *);