* 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, 7 insertions, 2 deletions

diff --git a/gcc/toplev.h b/gcc/toplev.h
index 4203207f096..93b30f44578 100644
--- a/gcc/toplev.h
+++ b/gcc/toplev.h
@@ -31,7 +31,7 @@ struct rtx_def;
 #define skip_leading_substring(whole,  part) \
    (strncmp (whole, part, strlen (part)) ? NULL : whole + strlen (part))
 
-extern int toplev_main			PARAMS ((int argc, char **argv));
+extern int toplev_main			PARAMS ((int, char **));
 extern int read_integral_parameter	PARAMS ((const char *, const char *,
 						const int));
 extern int count_error			PARAMS ((int));
@@ -127,7 +127,8 @@ struct lang_hooks_for_tree_inlining
 					     void *, void *));
   int (*cannot_inline_tree_fn) PARAMS ((union tree_node **));
   int (*disregard_inline_limits) PARAMS ((union tree_node *));
-  union tree_node *(*add_pending_fn_decls) PARAMS ((void*, union tree_node *));
+  union tree_node *(*add_pending_fn_decls) PARAMS ((void *,
+						    union tree_node *));
   int (*tree_chain_matters_p) PARAMS ((union tree_node *));
   int (*auto_var_in_fn_p) PARAMS ((union tree_node *, union tree_node *));
   union tree_node *(*copy_res_decl_for_inlining) PARAMS ((union tree_node *,
@@ -164,6 +165,10 @@ struct lang_hooks
   /* Called when all command line options have been processed.  */
   void (*post_options) PARAMS ((void));
 
+  /* Called to obtain the alias set to be used for an expression or type.
+     Returns -1 if the language does nothing special for it.  */
+  HOST_WIDE_INT (*get_alias_set) PARAMS ((tree));
+
   /* Nonzero if TYPE_READONLY and TREE_READONLY should always be honored.  */
   bool honor_readonly;