system.h (DEFAULT_CALLER_SAVES): Poison.

	* system.h (DEFAULT_CALLER_SAVES): Poison.
	* toplev.c (flag_caller_saves): Always initialize with 0.
	* doc/tm.texi (DEFAULT_CALLER_SAVES): Remove.

From-SVN: r74655

gcc/ChangeLog

 2003-12-15  Kazu Hirata  <kazu@cs.umass.edu>
 
+	* system.h (DEFAULT_CALLER_SAVES): Poison.
+	* toplev.c (flag_caller_saves): Always initialize with 0.
+	* doc/tm.texi (DEFAULT_CALLER_SAVES): Remove.
+
+2003-12-15  Kazu Hirata  <kazu@cs.umass.edu>
+
 	* flow.c (EXIT_IGNORE_STACK): Move to ...
 	* defaults.h (EXIT_IGNORE_STACK): ... here.
 	* dojump.c (clear_pending_stack_adjust): Don't use #ifdef

gcc/doc/tm.texi

@@ -4010,14 +4010,6 @@ If you enable it, GCC can save registers around function calls.  This
 makes it possible to use call-clobbered registers to hold variables that
 must live across calls.
 
-@defmac DEFAULT_CALLER_SAVES
-Define this macro if function calls on the target machine do not preserve
-any registers; in other words, if @code{CALL_USED_REGISTERS} has 1
-for all registers.  When defined, this macro enables @option{-fcaller-saves}
-by default for all optimization levels.  It has no effect for optimization
-levels 2 and higher, where @option{-fcaller-saves} is the default.
-@end defmac
-
 @defmac CALLER_SAVE_PROFITABLE (@var{refs}, @var{calls})
 A C expression to determine whether it is worthwhile to consider placing
 a pseudo-register in a call-clobbered hard register and saving and

gcc/system.h

@@ -618,7 +618,7 @@ typedef char _Bool;
 	DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE		   \
 	INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT	   \
 	EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER	   \
-	LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL
+	LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES
 
 /* Hooks that are no longer used.  */
  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE	\

gcc/toplev.c

@@ -471,11 +471,7 @@ int flag_short_enums;
    be saved across function calls, if that produces overall better code.
    Optional now, so people can test it.  */
 
-#ifdef DEFAULT_CALLER_SAVES
-int flag_caller_saves = 1;
-#else
 int flag_caller_saves = 0;
-#endif
 
 /* Nonzero if structures and unions should be returned in memory.