* alias.c (can_address_p): Compnonents are not addressable if

	the containing type has alias set 0.
	(get_alias_set): Rework to use STRIP_NOPS.
	Only call front-end routine on object, type, or object with
	NOPs stripped, not inner values.
	Use language hook to call front-end routine.
	* builtins.c (get_memory_rtx): Always call set_mem_attributes.
	(expand_builtin_apply): Call set_mem_align on MEMs we make.
	Don't pass alignment to emit_block_move.
	(expand_builtin_memcpy, expand_builtin_va_copy): Likewise.
	(expand_builtin_memset): Likewise, but for clear_storage.
	* c-common.c (lang_get_alias_set): Renamed to c_common_alias_set
	and remove C++ specific parts.
	* c-common.h (c_common_get_alias_set): Add declaration.
	* c-lang.c (LANG_HOOKS_GET_ALIAS_SET): New macro.
	* calls.c (emit_call_1): Fix typo in sibcall_pop case.
	(save_fixed_argument_area): Call set_mem_align.
	Remove alignment in call to emit_block_move.
	(emit_library_call_value_1, store_one_arg): Likewise.
	(target_for_arg): Remove; disabled long ago.
	* emit-rtl.c (set_mem_attributes): Rework to only call get_mem_attrs
	once and similar cleanups.
	(offset_address): Use proper introductory comment.
	* expr.c (emit_block_move): Use alignment from that of MEM args, not
	from explicit operand; all callers changed.
	(clear_storage): Likewise.
	(expand_assignment): Don't call set_mem_alias_set on to_rtx.
	(store_field): Remove kludge on alias set used for to_rtx.
	(highest_pow2_factor, case *_DIV_EXPR): Never return 0.
	(expand_expr_unaligned): Call set_mem_attributes instead of
	set_mem_alias_set.
	* expr.h (emit_block_move, clear_storage): Remove ALIGN argument.
	* function.c (assign_stack_temp_for_type): Set MEM alignment.
	(expand_function_end): Track MEM attributes of trampolines.
	* ifcvt.c (noce_try_cmove_arith): Set alignment of new MEM.
	* integrate.c (copy_rtx_and_substitute, case CALL): Copy memory
	attributes from original.
	* langhooks.c (lang_hook_default_get_alias_set): New function.
	(hook_get_alias_set_0): New function.
	* langhooks.h (hook_get_alias_set_0): New declaration.
	(lang_hook_default_get_alias_set): Likewise.
	(LANG_HOOKS_GET_ALIAS_SET): New macro; add to initializer.
	* reload1.c (alter_reg): Use adjust_address_nv.
	* rtl.c (get_mode_alignment): Moved to here.
	* rtl.h (MEM_ALIGN): Take default from mode, if not BLKmode, and
	change default if unknown from 1 to BITS_PER_UNIT.
	* stor-layout.c (get_mode_alignment): Remove from here.
	* toplev.h (struct lang_hoks): Add get_alias_set field.
	* tree.h (lang_get_alias_set): Delete declaration.
	* config/arc/arc.c (arc_setup_incoming_varags): Set MEM alignment.
	* config/i386/i386.c (ix86_setup_incoming_varargs): Likewise.
	(ix86_va_arg): Likewise.
	* config/i960/i960.c (i960_setup_incoming_varargs): Likewise.
	* config/pa/pa.c (hppa_builtin_saveregs): Likewise.
	* config/sparc/sparc.c (sparc_va_arg): Likewise.
	* config/rs6000/rs6000.c (setup_incoming_varargs): Likewise.
	(expand_block_move_mem): Remove dead code.
	* cp/cp-lang.c (cxx_get_alias_set): New function.
	Point LANG_HOOKS_GET_ALIAS_SET to it.
	* f/com.c (LANG_HOOKS_GET_ALIAS_SET): New macro.
	(lang_get_alias_set): Delete.
	* java/lang.c (lang_get_alias_set): Deleted.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@46440 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 18 insertions, 9 deletions

diff --git a/gcc/langhooks.h b/gcc/langhooks.h
index 0b4d72f6c46..69ff1d819bf 100644
--- a/gcc/langhooks.h
+++ b/gcc/langhooks.h
@@ -22,6 +22,10 @@ Boston, MA 02111-1307, USA.  */
 #ifndef GCC_LANG_HOOKS_H
 #define GCC_LANG_HOOKS_H
 
+/* Provide a hook routine for alias sets that always returns 1.  This is
+   used by languages that haven't deal with alias sets yet.  */
+extern HOST_WIDE_INT hook_get_alias_set_0	PARAMS ((tree));
+
 /* Note to creators of new hooks:
 
    The macros in this file should NOT be surrounded by a
@@ -33,30 +37,34 @@ Boston, MA 02111-1307, USA.  */
 
 extern void lang_hook_default_do_nothing PARAMS ((void));
 extern int lang_hook_default_decode_option PARAMS ((int, char **));
+extern HOST_WIDE_INT lang_hook_default_get_alias_set PARAMS ((tree));
 
 #define LANG_HOOKS_INIT			lang_hook_default_do_nothing
 #define LANG_HOOKS_FINISH		lang_hook_default_do_nothing
 #define LANG_HOOKS_INIT_OPTIONS		lang_hook_default_do_nothing
 #define LANG_HOOKS_DECODE_OPTION	lang_hook_default_decode_option
 #define LANG_HOOKS_POST_OPTIONS		lang_hook_default_do_nothing
+#define LANG_HOOKS_GET_ALIAS_SET	lang_hook_default_get_alias_set
 
 #define LANG_HOOKS_HONOR_READONLY	false
 
 /* Declarations of default tree inlining hooks.  */
-tree tree_inlining_default_hook_walk_subtrees PARAMS ((tree*, int *,
-						       walk_tree_fn,
-						       void *, void *));
-int tree_inlining_default_hook_cannot_inline_tree_fn PARAMS ((tree*));
-int tree_inlining_default_hook_disregard_inline_limits PARAMS ((tree));
-tree tree_inlining_default_hook_add_pending_fn_decls PARAMS ((void*, tree));
-int tree_inlining_default_hook_tree_chain_matters_p PARAMS ((tree));
-int tree_inlining_default_hook_auto_var_in_fn_p PARAMS ((tree, tree));
+tree tree_inlining_default_hook_walk_subtrees		PARAMS ((tree *, int *,
+								 walk_tree_fn,
+								 void *,
+								 void *));
+int tree_inlining_default_hook_cannot_inline_tree_fn	PARAMS ((tree *));
+int tree_inlining_default_hook_disregard_inline_limits	PARAMS ((tree));
+tree tree_inlining_default_hook_add_pending_fn_decls	PARAMS ((void *,
+								 tree));
+int tree_inlining_default_hook_tree_chain_matters_p	PARAMS ((tree));
+int tree_inlining_default_hook_auto_var_in_fn_p		PARAMS ((tree, tree));
 tree tree_inlining_default_hook_copy_res_decl_for_inlining PARAMS ((tree, tree,
 								    tree,
 								    void *,
 								    int *,
 								    void *));
-int tree_inlining_default_hook_anon_aggr_type_p PARAMS ((tree));
+int tree_inlining_default_hook_anon_aggr_type_p		PARAMS ((tree));
 
 /* Tree inlining hooks.  */
 #define LANG_HOOKS_TREE_INLINING_WALK_SUBTREES \
@@ -94,6 +102,7 @@ int tree_inlining_default_hook_anon_aggr_type_p PARAMS ((tree));
   LANG_HOOKS_INIT_OPTIONS, \
   LANG_HOOKS_DECODE_OPTION, \
   LANG_HOOKS_POST_OPTIONS, \
+  LANG_HOOKS_GET_ALIAS_SET, \
   LANG_HOOKS_HONOR_READONLY, \
   LANG_HOOKS_TREE_INLINING_INITIALIZER \
 }