* tree.h (enum tree_index): Add TI_VA_LIST_GPR_COUNTER_FIELD

	and TI_VA_LIST_FPR_COUNTER_FIELD.
	(va_list_gpr_counter_field, va_list_fpr_counter_field): Define.
	* tree-pass.h (pass_stdarg): Add.
	* tree-optimize.c (init_tree_optimization_passes): Add pass_stdarg.
	* tree-stdarg.c: New file.
	* tree-stdarg.h: New file.
	* Makefile.in (OBJS-common): Add tree-stdarg.o.
	(tree-stdarg.o): Add dependencies.
	* function.h (struct function): Add va_list_gpr_size and
	va_list_fpr_size fields.
	* function.c (allocate_struct_function): Initialize them.
	* target.h (struct gcc_target): Add stdarg_optimize_hook.
	* target-def.h (TARGET_STDARG_OPTIMIZE_HOOK): Define.
	(TARGET_INITIALIZER): Add it.

	* config/i386/i386.c (ix86_build_builtin_va_list): Initialize
	va_list_{g,f}pr_counter_field.
	(ix86_setup_incoming_varargs): Don't do anything if reg_save
	area will not be used.  Only save registers that tree-stdarg.c
	detected they need saving.
	(ix86_va_start): Don't set up fields that won't be used.

	* config/rs6000/rs6000.c (rs6000_build_builtin_va_list): Initialize
	va_list_{g,f}pr_counter_field.
	(setup_incoming_varargs): Don't do anything if reg_save
	area will not be used.  Only save registers that tree-stdarg.c
	detected they need saving.
	(rs6000_va_start): Don't set up fields that won't be used.

	* config/alpha/alpha.c: Include tree-flow.h and tree-stdarg.h.
	(alpha_build_builtin_va_list): Initialize va_list_gpr_counter_field.
	(va_list_skip_additions, alpha_stdarg_optimize_hook): New functions.
	(TARGET_STDARG_OPTIMIZE_HOOK): Define.

	* gcc.dg/tree-ssa/stdarg-1.c: New test.
	* gcc.dg/tree-ssa/stdarg-2.c: New test.
	* gcc.dg/tree-ssa/stdarg-3.c: New test.
	* gcc.dg/tree-ssa/stdarg-4.c: New test.
	* gcc.dg/tree-ssa/stdarg-5.c: New test.
	* gcc.c-torture/execute/stdarg-4.c: New test.

	* gcc.dg/vmx/varargs-1.c (f1, f2, f3): Add missing va_end.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@97916 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 8 insertions, 0 deletions

diff --git a/gcc/target.h b/gcc/target.h
index bb914da7037..42a721ce2af 100644
--- a/gcc/target.h
+++ b/gcc/target.h
@@ -50,6 +50,8 @@ Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 #include "tm.h"
 #include "insn-modes.h"
 
+struct stdarg_info;
+
 struct gcc_target
 {
   /* Functions that output assembler for the target.  */
@@ -506,6 +508,12 @@ struct gcc_target
      to let the backend emit the call frame instructions.  */
   void (* dwarf_handle_frame_unspec) (const char *, rtx, int);
 
+  /* Perform architecture specific checking of statements gimplified
+     from VA_ARG_EXPR.  LHS is left hand side of MODIFY_EXPR, RHS
+     is right hand side.  Returns true if the statements doesn't need
+     to be checked for va_list references.  */
+  bool (*stdarg_optimize_hook) (struct stdarg_info *ai, tree lhs, tree rhs);
+
   /* Functions relating to calls - argument passing, returns, etc.  */
   struct calls {
     bool (*promote_function_args) (tree fntype);