PR c++/15463

	* loop-iv.c (iv_number_of_iterations):  Use trunc_int_for_mode on
	result of inverse.

	PR rtl-optimization/15274
	* loop-iv.c (determine_max_iter, shorten_into_mode,
	iv_number_of_iterations): Handle constants correctly.
	* rtl.h (get_mode_bounds): Declaration changed.
	* stor-layout.c (get_mode_bounds): Return a constant suitable for
	the target mode.

	PR rtl-optimization/14692
	* loop-unswitch.c (may_unswitch_on): Try folding the result.
	(unswitch_single_loop): Work correctly when may_unswitch_on
	returns a folded constant.

	* loop-iv.c (implies_p): Handle A < B ==> A + 1 <= B.
	* simplify-rtx.c (simplify_const_relational_operation): Optimize
	comparisons with mode bounds.

	* function.c (struct temp_slot): Add new field prev.
	(free_after_compilation, init_temp_slots): Free new fields.
	(cut_slot_from_list, insert_slot_to_list,
	temp_slots_at_level, max_slot_level, move_slot_to_level,
	make_slot_available): New functions.
	(assign_stack_temp_for_type, combine_temp_slots,
	find_temp_slot_from_address, preserve_temp_slots,
	preserve_rtl_expr_result, free_temp_slots,
	free_temps_for_rtl_expr, pop_temp_slots): Work with
	the new structure of lists.
	(mark_all_temps_used): Removed.
	* function.h (struct function): Field x_temp_slots
	replaced by x_used_temp_slots and x_avail_temp_slots.
	(temp_slots): Replaced by ...
	(used_temp_slots, avail_temp_slots): New.
	* tree.h (mark_all_temps_used): Declaration removed.

	* loop-iv.c (mark_single_set, get_biv_step_1, iv_analyze,
	simplify_using_assignment): Take the expression out of
	the expr_list wrapper.

	* loop-iv.c (iv_number_of_iterations): Improve clasification of
	infinite loops.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@82028 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 7 insertions, 3 deletions

diff --git a/gcc/function.h b/gcc/function.h
index 4c7537eba6d..1a9c4c9f3e0 100644
--- a/gcc/function.h
+++ b/gcc/function.h
@@ -322,8 +322,11 @@ struct function GTY(())
      element in this vector is one less than MAX_PARM_REG, above.  */
   rtx * GTY ((length ("%h.x_max_parm_reg"))) x_parm_reg_stack_loc;
 
-  /* List of all temporaries allocated, both available and in use.  */
-  struct temp_slot *x_temp_slots;
+  /* List of all used temporaries allocated, by level.  */
+  struct varray_head_tag * GTY((param_is (struct temp_slot))) x_used_temp_slots;
+
+  /* List of available temp slots.  */
+  struct temp_slot *x_avail_temp_slots;
 
   /* Current nesting level for temporaries.  */
   int x_temp_slot_level;
@@ -563,7 +566,8 @@ extern int trampolines_created;
 #define rtl_expr_chain (cfun->x_rtl_expr_chain)
 #define last_parm_insn (cfun->x_last_parm_insn)
 #define function_call_count (cfun->x_function_call_count)
-#define temp_slots (cfun->x_temp_slots)
+#define used_temp_slots (cfun->x_used_temp_slots)
+#define avail_temp_slots (cfun->x_avail_temp_slots)
 #define temp_slot_level (cfun->x_temp_slot_level)
 #define target_temp_slot_level (cfun->x_target_temp_slot_level)
 #define var_temp_slot_level (cfun->x_var_temp_slot_level)