* ginclude/varargs.h: Replace with stub which issues #error.

	* ginclude/stdarg.h: __builtin_stdarg_start is renamed
	__builtin_va_start.

	* builtins.def (BUILT_IN_VARARGS_START): Delete.
	(BUILT_IN_VA_START): New.
	* builtins.c (expand_builtin_va_start): Eliminate first
	argument and code to implement pre-ISO varargs.
	(std_expand_builtin_va_start): Ignore first argument; it is
	always 1.
	(expand_builtin): Handle BUILT_IN_VA_START and
	BUILT_IN_STDARG_START identically.  Delete
	BUILT_IN_VARARGS_START case.

	* function.c (assign_parms): Delete hide_last_arg and all
	its uses.
	(mark_varargs): Delete function.
	* function.h (struct function): Delete 'varargs' bit.
	(current_function_varargs): Delete macro.
	* tree.h: Don't declare mark_varargs.

	* c-decl.c (c_function_varargs, c_mark_varargs): Delete.
	(c_expand_body): Don't call mark_varargs.
	* c-objc-common.c: Handle BUILT_IN_VA_START and
	BUILT_IN_STDARG_START identically.  Delete
	BUILT_IN_VARARGS_START case.
	* c-tree.h: Don't declare c_mark_varargs.
	* c-parse.in: Remove grammar rules for '&...' (which has been
	commented out since before 2.7.2) and for '...' in K+R
	argument declarations.

	* builtins.c, function.c, integrate.c, sibcall.c,
	config/alpha/unicosmk.h, config/arc/arc.c, config/arc/arc.h,
	config/avr/avr.c, config/cris/cris.c, config/fr30/fr30.c,
	config/i960/i960.c, config/i960/i960.md, config/m32r/m32r.c,
	config/m32r/m32r.h, config/m88k/m88k.c, config/m88k/m88k.h,
	config/mips/mips.c, config/mmix/mmix.c, config/mmix/mmix.h,
	config/mn10300/mn10300.c, config/pa/som.h, config/s390/s390.c,
	config/sh/sh.c, config/sh/sh.h, config/sparc/sparc.h,
	config/stormy16/stormy16.c: Delete all references to
	current_function_varargs, and code predicated on that flag.

	* config/alpha/alpha.c (alpha_va_start),
	config/arc/arc.c (arc_va_start),
	config/i386/i386.c (ix86_va_start),
	config/mips/mips.c (mips_va_start),
	config/mn10300/mn10300.c (mn10300_va_start),
	config/rs6000/rs6000.c (rs6000_va_start),
	config/s390/s390.c (s390_va_start),
	config/sh/sh.c (sh_va_start),
	Ignore first argument; it is always 1.

	* config/c4x/c4x-protos.h, config/c4x/c4x.c: Delete c4x_va_start.
	* config/ia64/ia64-protos.h, config/ia64/ia64.c: Delete ia64_va_start.
	* config/m68hc11/m68hc11-protos.h, config/m68hc11/m68hc11.c:
	Delete m68hc11_va_start.
	* config/c4x/c4x.h, config/ia64/ia64.h, config/m68hc11/m68hc11.h:
	No need to define EXPAND_BUILTIN_VA_START.

	* doc/invoke.texi, doc/sourcebuild.texi, doc/tm.texi,
	doc/trouble.texi: Remove references to GCC-provided <varargs.h>.

testsuite:
	* c-torture/execute/991216-3.c, c-torture/execute/strct-varg-1.c,
	c-torture/execute/va-arg-7.c, c-torture/execute/va-arg-8.c,
	c-torture/execute/va-arg-15.c, c-torture/execute/va-arg-16.c,
	c-torture/execute/va-arg-17.c, c-torture/execute/va-arg-19.c:
	Convert to use <stdarg.h>.
	* c-torture/execute/va-arg-3.c, c-torture/execute/va-arg-3.x:
	Delete.
	* gcc.dg/va-arg-2.c: New.
	* lib/gcc.exp, lib/objc.exp: Remove code to set -DNO_VARARGS.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@55472 138bc75d-0d04-0410-961f-82ee72b054a4

2 files changed, 7 insertions, 17 deletions

diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
index 9ea6df7a027..63767dd5f16 100644
--- a/gcc/config/arc/arc.c
+++ b/gcc/config/arc/arc.c
@@ -802,12 +802,8 @@ arc_setup_incoming_varargs (cum, mode, type, pretend_size, no_rtl)
   if (mode == BLKmode)
     abort ();
 
-  /* We must treat `__builtin_va_alist' as an anonymous arg.  */
-  if (current_function_varargs)
-    first_anon_arg = *cum;
-  else
-    first_anon_arg = *cum + ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1)
-			     / UNITS_PER_WORD);
+  first_anon_arg = *cum + ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1)
+			   / UNITS_PER_WORD);
 
   if (first_anon_arg < MAX_ARC_PARM_REGS && !no_rtl)
     {
@@ -2266,7 +2262,7 @@ arc_ccfsm_record_branch_deleted ()
 
 void
 arc_va_start (stdarg_p, valist, nextarg)
-     int stdarg_p;
+     int stdarg_p ATTRIBUTE_UNUSED;
      tree valist;
      rtx nextarg;
 {
@@ -2275,7 +2271,7 @@ arc_va_start (stdarg_p, valist, nextarg)
       && (current_function_args_info & 1))
     nextarg = plus_constant (nextarg, UNITS_PER_WORD);
 
-  std_expand_builtin_va_start (stdarg_p, valist, nextarg);
+  std_expand_builtin_va_start (1, valist, nextarg);
 }
 
 rtx
diff --git a/gcc/config/arc/arc.h b/gcc/config/arc/arc.h
index 1390d6bc2a1..db8b8d452fd 100644
--- a/gcc/config/arc/arc.h
+++ b/gcc/config/arc/arc.h
@@ -665,15 +665,9 @@ extern enum reg_class arc_regno_reg_class[FIRST_PSEUDO_REGISTER];
    a reg.  This includes arguments that have to be passed by reference as the
    pointer to them is passed in a reg if one is available (and that is what
    we're given).
-   When passing arguments NAMED is always 1.  When receiving arguments NAMED
-   is 1 for each argument except the last in a stdarg/varargs function.  In
-   a stdarg function we want to treat the last named arg as named.  In a
-   varargs function we want to treat the last named arg (which is
-   `__builtin_va_alist') as unnamed.
    This macro is only used in this file.  */
-#define PASS_IN_REG_P(CUM, MODE, TYPE, NAMED) \
-((!current_function_varargs || (NAMED))					\
- && (CUM) < MAX_ARC_PARM_REGS						\
+#define PASS_IN_REG_P(CUM, MODE, TYPE) \
+((CUM) < MAX_ARC_PARM_REGS						\
  && ((ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE))				\
       + ROUND_ADVANCE_ARG ((MODE), (TYPE))				\
       <= MAX_ARC_PARM_REGS)))
@@ -693,7 +687,7 @@ extern enum reg_class arc_regno_reg_class[FIRST_PSEUDO_REGISTER];
 /* On the ARC the first MAX_ARC_PARM_REGS args are normally in registers
    and the rest are pushed.  */
 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
-(PASS_IN_REG_P ((CUM), (MODE), (TYPE), (NAMED))				\
+(PASS_IN_REG_P ((CUM), (MODE), (TYPE))					\
  ? gen_rtx_REG ((MODE), ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE)))	\
  : 0)