public inbox for gcc-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc r14-1630] i386: Fix endless recursion in ix86_expand_vector_init_general with MMX [PR110152]
@ 2023-06-08 8:12 Jakub Jelinek
0 siblings, 0 replies; only message in thread
From: Jakub Jelinek @ 2023-06-08 8:12 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:2b2bf793d3fb8980cb2b83e9e2a8c236ad2434f5
commit r14-1630-g2b2bf793d3fb8980cb2b83e9e2a8c236ad2434f5
Author: Jakub Jelinek <jakub@redhat.com>
Date: Thu Jun 8 10:11:25 2023 +0200
i386: Fix endless recursion in ix86_expand_vector_init_general with MMX [PR110152]
I'm getting
+FAIL: gcc.target/i386/3dnow-1.c (internal compiler error: Segmentation fault signal terminated program cc1)
+FAIL: gcc.target/i386/3dnow-1.c (test for excess errors)
+FAIL: gcc.target/i386/3dnow-2.c (internal compiler error: Segmentation fault signal terminated program cc1)
+FAIL: gcc.target/i386/3dnow-2.c (test for excess errors)
+FAIL: gcc.target/i386/mmx-1.c (internal compiler error: Segmentation fault signal terminated program cc1)
+FAIL: gcc.target/i386/mmx-1.c (test for excess errors)
+FAIL: gcc.target/i386/mmx-2.c (internal compiler error: Segmentation fault signal terminated program cc1)
+FAIL: gcc.target/i386/mmx-2.c (test for excess errors)
regressions on i686-linux since r14-1166. The problem is when
ix86_expand_vector_init_general is called with mmx_ok = true and
mode = V4HImode, it newly recurses with mmx_ok = false and mode = V2SImode,
but as mmx_ok is false and !TARGET_SSE, we recurse again with the same
arguments (ok, fresh new tmp and vals) infinitely.
The following patch fixes that by passing mmx_ok to that recursive call.
For n_words == 4 it isn't needed, because we only care about mmx_ok for
V2SImode or V2SFmode and no other modes.
2023-06-08 Jakub Jelinek <jakub@redhat.com>
PR target/110152
* config/i386/i386-expand.cc (ix86_expand_vector_init_general): For
n_words == 2 recurse with mmx_ok as first argument rather than false.
Diff:
---
gcc/config/i386/i386-expand.cc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/config/i386/i386-expand.cc b/gcc/config/i386/i386-expand.cc
index 697eb475f48..def060ab562 100644
--- a/gcc/config/i386/i386-expand.cc
+++ b/gcc/config/i386/i386-expand.cc
@@ -16376,7 +16376,7 @@ quarter:
machine_mode concat_mode = tmp_mode == DImode ? V2DImode : V2SImode;
rtx tmp = gen_reg_rtx (concat_mode);
vals = gen_rtx_PARALLEL (concat_mode, gen_rtvec_v (2, words));
- ix86_expand_vector_init_general (false, concat_mode, tmp, vals);
+ ix86_expand_vector_init_general (mmx_ok, concat_mode, tmp, vals);
emit_move_insn (target, gen_lowpart (mode, tmp));
}
else if (n_words == 4)
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2023-06-08 8:12 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-06-08 8:12 [gcc r14-1630] i386: Fix endless recursion in ix86_expand_vector_init_general with MMX [PR110152] Jakub Jelinek
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).