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From b0d3536b2a28d3a7084e3bbb9532e719aaf2016b Mon Sep 17 00:00:00 2001
From: Richard Sandiford <richard.sandiford@arm.com>
Date: Sat, 11 Nov 2023 17:28:59 +0000
Subject: [PATCH 042/157] [Backport][SME] mode-switching: Use 1-based edge aux
fields
Reference: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=718228a6f479fe252e0e6f71933c2465b7b480a9
The pass used the edge aux field to record which mode change
should happen on the edge, with -1 meaning "none". It's more
convenient for later patches to leave aux zero for "none",
and use numbers based at 1 to record a change.
gcc/
* mode-switching.cc (commit_mode_sets): Use 1-based edge aux values.
---
gcc/mode-switching.cc | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/gcc/mode-switching.cc b/gcc/mode-switching.cc
index 4f0445894..89a8494c6 100644
--- a/gcc/mode-switching.cc
+++ b/gcc/mode-switching.cc
@@ -106,10 +106,10 @@ commit_mode_sets (struct edge_list *edge_list, int e, struct bb_info *info)
for (int ed = NUM_EDGES (edge_list) - 1; ed >= 0; ed--)
{
edge eg = INDEX_EDGE (edge_list, ed);
- int mode;
- if ((mode = (int)(intptr_t)(eg->aux)) != -1)
+ if (eg->aux)
{
+ int mode = (int) (intptr_t) eg->aux - 1;
HARD_REG_SET live_at_edge;
basic_block src_bb = eg->src;
int cur_mode = info[src_bb->index].mode_out;
@@ -727,14 +727,14 @@ optimize_mode_switching (void)
{
edge eg = INDEX_EDGE (edge_list, ed);
- eg->aux = (void *)(intptr_t)-1;
+ eg->aux = (void *) (intptr_t) 0;
for (i = 0; i < no_mode; i++)
{
int m = targetm.mode_switching.priority (entity_map[j], i);
if (mode_bit_p (insert[ed], j, m))
{
- eg->aux = (void *)(intptr_t)m;
+ eg->aux = (void *) (intptr_t) (m + 1);
break;
}
}
--
2.33.0
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