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re PR middle-end/17813 (ada bootstrap failure on i486-linux)

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PR middle-end/17813
	* dojump.c (discard_pending_stack_adjust): New function.
	(clear_pending_stack_adjust): Call it.
	* expr.h (discard_pending_stack_adjust): Declare it.
	* explow.c (emit_stack_save): Emit pending stack adjustments
	before saving the stack pointer.
	(emit_stack_restore): Discard pending stack adjustments before
	restoring the stack pointer.

Co-Authored-By: Roger Sayle <roger@eyesopen.com>

From-SVN: r89251
This commit is contained in:
Eric Botcazou 2004-10-19 00:06:36 +02:00 committed by Eric Botcazou
parent 829acd784a
commit a494ed43ab
4 changed files with 29 additions and 4 deletions
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12
gcc/ChangeLog
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@ -1,3 +1,15 @@
2004-10-18 Eric Botcazou <ebotcazou@libertysurf.fr>
Roger Sayle <roger@eyesopen.com>
PR middle-end/17813
* dojump.c (discard_pending_stack_adjust): New function.
(clear_pending_stack_adjust): Call it.
* expr.h (discard_pending_stack_adjust): Declare it.
* explow.c (emit_stack_save): Emit pending stack adjustments
before saving the stack pointer.
(emit_stack_restore): Discard pending stack adjustments before
restoring the stack pointer.
2004-10-18 Richard Henderson <rth@redhat.com>
* c-common.c (handle_mode_attribute): Allow scalar->vector

14
gcc/dojump.c
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@ -50,6 +50,15 @@ init_pending_stack_adjust (void)
pending_stack_adjust = 0;
}
/* Discard any pending stack adjustment. This avoid relying on the
RTL optimizers to remove useless adjustments when we know the
stack pointer value is dead. */
void discard_pending_stack_adjust (void)
{
stack_pointer_delta -= pending_stack_adjust;
pending_stack_adjust = 0;
}
/* When exiting from function, if safe, clear out any pending stack adjust
so the adjustment won't get done.
@ -64,10 +73,7 @@ clear_pending_stack_adjust (void)
&& EXIT_IGNORE_STACK
&& ! (DECL_INLINE (current_function_decl) && ! flag_no_inline)
&& ! flag_inline_functions)
{
stack_pointer_delta -= pending_stack_adjust,
pending_stack_adjust = 0;
}
discard_pending_stack_adjust ();
}
/* Pop any previously-pushed arguments that have not been popped yet. */

4
gcc/explow.c
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@ -965,6 +965,7 @@ emit_stack_save (enum save_level save_level, rtx *psave, rtx after)
rtx seq;
start_sequence ();
do_pending_stack_adjust ();
/* We must validize inside the sequence, to ensure that any instructions
created by the validize call also get moved to the right place. */
if (sa != 0)
@ -976,6 +977,7 @@ emit_stack_save (enum save_level save_level, rtx *psave, rtx after)
}
else
{
do_pending_stack_adjust ();
if (sa != 0)
sa = validize_mem (sa);
emit_insn (fcn (sa, stack_pointer_rtx));
@ -1032,6 +1034,8 @@ emit_stack_restore (enum save_level save_level, rtx sa, rtx after)
gen_rtx_MEM (BLKmode, stack_pointer_rtx)));
}
discard_pending_stack_adjust ();
if (after)
{
rtx seq;

3
gcc/expr.h
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@ -499,6 +499,9 @@ extern void expand_var (tree);
arguments waiting to be popped. */
extern void init_pending_stack_adjust (void);
/* Discard any pending stack adjustment. */
extern void discard_pending_stack_adjust (void);
/* When exiting from function, if safe, clear out any pending stack adjust
so the adjustment won't get done. */
extern void clear_pending_stack_adjust (void);