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[patch] expemd.c: Remove insns_safe_to_move_p.
- From: Kazu Hirata <kazu at codesourcery dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Sat, 4 Mar 2006 10:04:59 -0800
- Subject: [patch] expemd.c: Remove insns_safe_to_move_p.
Hi,
Attached is a patch to remove insns_safe_to_move_p as the recent
removal of loop.c made this function unused.
Tested on x86_64-pc-linux-gnu. OK to apply?
Kazu Hirata
2006-03-04 Kazu Hirata <kazu@codesourcery.com>
* rtlanal.c (insns_safe_to_move_p): Remove.
* rtl.h: Remove the prototype for insns_safe_to_move_p.
Index: rtl.h
===================================================================
--- rtl.h (revision 111687)
+++ rtl.h (working copy)
@@ -1734,7 +1734,6 @@ extern rtx regno_use_in (unsigned int, r
extern int auto_inc_p (rtx);
extern int in_expr_list_p (rtx, rtx);
extern void remove_node_from_expr_list (rtx, rtx *);
-extern int insns_safe_to_move_p (rtx, rtx, rtx *);
extern int loc_mentioned_in_p (rtx *, rtx);
extern rtx find_first_parameter_load (rtx, rtx);
extern bool keep_with_call_p (rtx);
Index: rtlanal.c
===================================================================
--- rtlanal.c (revision 111687)
+++ rtlanal.c (working copy)
@@ -2927,82 +2927,6 @@ auto_inc_p (rtx x)
return 0;
}
-/* Return 1 if the sequence of instructions beginning with FROM and up
- to and including TO is safe to move. If NEW_TO is non-NULL, and
- the sequence is not already safe to move, but can be easily
- extended to a sequence which is safe, then NEW_TO will point to the
- end of the extended sequence.
-
- For now, this function only checks that the region contains whole
- exception regions, but it could be extended to check additional
- conditions as well. */
-
-int
-insns_safe_to_move_p (rtx from, rtx to, rtx *new_to)
-{
- int eh_region_count = 0;
- int past_to_p = 0;
- rtx r = from;
-
- /* By default, assume the end of the region will be what was
- suggested. */
- if (new_to)
- *new_to = to;
-
- while (r)
- {
- if (NOTE_P (r))
- {
- switch (NOTE_LINE_NUMBER (r))
- {
- case NOTE_INSN_EH_REGION_BEG:
- ++eh_region_count;
- break;
-
- case NOTE_INSN_EH_REGION_END:
- if (eh_region_count == 0)
- /* This sequence of instructions contains the end of
- an exception region, but not he beginning. Moving
- it will cause chaos. */
- return 0;
-
- --eh_region_count;
- break;
-
- default:
- break;
- }
- }
- else if (past_to_p)
- /* If we've passed TO, and we see a non-note instruction, we
- can't extend the sequence to a movable sequence. */
- return 0;
-
- if (r == to)
- {
- if (!new_to)
- /* It's OK to move the sequence if there were matched sets of
- exception region notes. */
- return eh_region_count == 0;
-
- past_to_p = 1;
- }
-
- /* It's OK to move the sequence if there were matched sets of
- exception region notes. */
- if (past_to_p && eh_region_count == 0)
- {
- *new_to = r;
- return 1;
- }
-
- /* Go to the next instruction. */
- r = NEXT_INSN (r);
- }
-
- return 0;
-}
-
/* Return nonzero if IN contains a piece of rtl that has the address LOC. */
int
loc_mentioned_in_p (rtx *loc, rtx in)