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* [Bug target/100445] New: ice during RTL pass: vregs
@ 2021-05-06 10:33 dcb314 at hotmail dot com
2021-05-06 11:12 ` [Bug target/100445] [12 Regression] " jakub at gcc dot gnu.org
` (14 more replies)
0 siblings, 15 replies; 16+ messages in thread
From: dcb314 at hotmail dot com @ 2021-05-06 10:33 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
Bug ID: 100445
Summary: ice during RTL pass: vregs
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
For this C code:
int kgd_get_dense_grid_point_double_mesh_mesh_i;
int kgd_get_dense_grid_point_double_mesh_mesh_address[3];
kgd_get_dense_grid_point_double_mesh_mesh() {
for (; kgd_get_dense_grid_point_double_mesh_mesh_i;
kgd_get_dense_grid_point_double_mesh_mesh_i++) {
kgd_get_dense_grid_point_double_mesh_mesh_address
[kgd_get_dense_grid_point_double_mesh_mesh_i] =
(kgd_get_dense_grid_point_double_mesh_mesh_i - 1) / 2;
}
get_grid_point_single_mesh(kgd_get_dense_grid_point_double_mesh_mesh_address);
}
compiled like this:
$ /home/dcb/gcc/results/bin/gcc -c -w -O3 -march=bdver2 bug716.c 2>&1 | more
bug716.c: In function ‘kgd_get_dense_grid_point_double_mesh_mesh’:
bug716.c:11:1: error: unrecognizable insn:
11 | }
| ^
(insn 22 21 23 5 (set (reg:V2SI 95 [ vect_patt_5.16 ])
(if_then_else:V2SI (reg:V2SI 105)
(reg:V2SI 93 [ _40 ])
(reg:V2SI 94 [ vect__1.14 ]))) -1
(nil))
during RTL pass: vregs
bug716.c:11:1: internal compiler error: in extract_insn, at recog.c:2770
The bug seems to occur sometime between git hash 61d48b1e2b5bae1e
and e1fcf14f33e4f371.
My best guess, from a bit bisect, is that Uros's commit with hash
f3661f2d63fbc5fd30c24d22137691e16b0a0a17 is the culprit.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
@ 2021-05-06 11:12 ` jakub at gcc dot gnu.org
2021-05-06 12:21 ` jakub at gcc dot gnu.org
` (13 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-05-06 11:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |12.0
CC| |jakub at gcc dot gnu.org
Summary|ice during RTL pass: vregs |[12 Regression] ice during
| |RTL pass: vregs
Status|UNCONFIRMED |NEW
Last reconfirmed| |2021-05-06
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I can confirm it started with r12-512-gd0d6ca019717305df0ef41e3fe1da48f7f561fac
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
2021-05-06 11:12 ` [Bug target/100445] [12 Regression] " jakub at gcc dot gnu.org
@ 2021-05-06 12:21 ` jakub at gcc dot gnu.org
2021-05-06 12:40 ` jakub at gcc dot gnu.org
` (12 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-05-06 12:21 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Sorry, r12-514-gf3661f2d63fbc5fd30c24d22137691e16b0a0a17
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
2021-05-06 11:12 ` [Bug target/100445] [12 Regression] " jakub at gcc dot gnu.org
2021-05-06 12:21 ` jakub at gcc dot gnu.org
@ 2021-05-06 12:40 ` jakub at gcc dot gnu.org
2021-05-06 12:49 ` jakub at gcc dot gnu.org
` (11 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-05-06 12:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Slightly more readable testcase without warnings, -O3 -mxop:
int a, b[3];
void bar (int *);
void
foo (void)
{
for (; a < 3; a++)
b[a] = (a - 1) / 2;
bar (b);
}
IMHO we can either avoid the TARGET_XOP stuff for 8-byte vector modes, like:
--- gcc/config/i386/i386-expand.c.jj 2021-05-06 10:14:55.486063301 +0200
+++ gcc/config/i386/i386-expand.c 2021-05-06 14:37:58.104025120 +0200
@@ -3653,7 +3653,7 @@ ix86_expand_sse_movcc (rtx dest, rtx cmp
emit_insn (gen_rtx_SET (dest, x));
return;
}
- else if (TARGET_XOP)
+ else if (TARGET_XOP && (!VECTOR_MODE_P (mode) || GET_MODE_SIZE (mode) != 8))
{
op_true = force_reg (mode, op_true);
or add the MMXMODEI xop_pcmov_* patterns.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
` (2 preceding siblings ...)
2021-05-06 12:40 ` jakub at gcc dot gnu.org
@ 2021-05-06 12:49 ` jakub at gcc dot gnu.org
2021-05-06 12:57 ` ubizjak at gmail dot com
` (10 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-05-06 12:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 50765
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50765&action=edit
gcc12-pr100445.patch
Untested patch that implements the latter.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
` (3 preceding siblings ...)
2021-05-06 12:49 ` jakub at gcc dot gnu.org
@ 2021-05-06 12:57 ` ubizjak at gmail dot com
2021-05-06 13:00 ` ubizjak at gmail dot com
` (9 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: ubizjak at gmail dot com @ 2021-05-06 12:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
ix86_expand_sse_movcc has special TARGET_XOP path, so the following patch is
needed:
diff --git a/gcc/config/i386/mmx.md b/gcc/config/i386/mmx.md
index 347295afbb5..667dd057e0d 100644
--- a/gcc/config/i386/mmx.md
+++ b/gcc/config/i386/mmx.md
@@ -1687,6 +1687,17 @@ (define_expand "vcondu<mode><mode>"
DONE;
})
+;; XOP parallel XMM conditional moves
+(define_insn "*mmx_pcmov<mode>"
+ [(set (match_operand:MMXMODEI 0 "register_operand" "=x")
+ (if_then_else:MMXMODEI
+ (match_operand:MMXMODEI 3 "register_operand" "x")
+ (match_operand:MMXMODEI 1 "register_operand" "x")
+ (match_operand:MMXMODEI 2 "register_operand" "x")))]
+ "TARGET_MMX_WITH_SSE && TARGET_XOP"
+ "vpcmov\t{%3, %2, %1, %0|%0, %1, %2, %3}"
+ [(set_attr "type" "sse4arg")])
+
(define_expand "vcond_mask_<mode><mode>"
[(set (match_operand:MMXMODEI 0 "register_operand")
(vec_merge:MMXMODEI
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
` (4 preceding siblings ...)
2021-05-06 12:57 ` ubizjak at gmail dot com
@ 2021-05-06 13:00 ` ubizjak at gmail dot com
2021-05-06 13:07 ` jakub at gcc dot gnu.org
` (8 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: ubizjak at gmail dot com @ 2021-05-06 13:00 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
--- Comment #6 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #5)
> ix86_expand_sse_movcc has special TARGET_XOP path, so the following patch is
> needed:
Ah, you beat me by the second ;)
Anyway, I have no XOP target, so probably you can test the patch on a real XOP
target.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
` (5 preceding siblings ...)
2021-05-06 13:00 ` ubizjak at gmail dot com
@ 2021-05-06 13:07 ` jakub at gcc dot gnu.org
2021-05-06 13:49 ` hjl.tools at gmail dot com
` (7 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-05-06 13:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I have no XOP CPU either, normally I bootstrap on Intel i9-7960X and on my
desktop I have AMD Ryzen 5 3600, but that doesn't have XOP either.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
` (6 preceding siblings ...)
2021-05-06 13:07 ` jakub at gcc dot gnu.org
@ 2021-05-06 13:49 ` hjl.tools at gmail dot com
2021-05-06 14:10 ` ubizjak at gmail dot com
` (6 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: hjl.tools at gmail dot com @ 2021-05-06 13:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
r514 also caused
FAIL: gcc.dg/pr97238.c (internal compiler error)
FAIL: gcc.dg/pr97238.c (test for excess errors)
FAIL: gcc.dg/vect/bb-slp-49.c -flto -ffat-lto-objects (internal compiler error)
FAIL: gcc.dg/vect/bb-slp-49.c -flto -ffat-lto-objects (test for excess errors)
FAIL: gcc.dg/vect/bb-slp-49.c (internal compiler error)
FAIL: gcc.dg/vect/bb-slp-49.c (test for excess errors)
FAIL: gcc.target/i386/pr96827.c (internal compiler error)
FAIL: gcc.target/i386/pr96827.c (test for excess errors)
with
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/pr97238.c
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="vect.exp=gcc.dg/vect/bb-slp-49.c --target_board='unix{-m64\
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr96827.c --target_board='unix{-m64\
-march=cascadelake}'"
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
` (7 preceding siblings ...)
2021-05-06 13:49 ` hjl.tools at gmail dot com
@ 2021-05-06 14:10 ` ubizjak at gmail dot com
2021-05-06 14:58 ` ubizjak at gmail dot com
` (5 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: ubizjak at gmail dot com @ 2021-05-06 14:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
--- Comment #9 from Uroš Bizjak <ubizjak at gmail dot com> ---
ix86_use_mask_cmp_p should be refined, it has an early return for 64bit modes:
if (GET_MODE_SIZE (mode) == 64)
return true;
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
` (8 preceding siblings ...)
2021-05-06 14:10 ` ubizjak at gmail dot com
@ 2021-05-06 14:58 ` ubizjak at gmail dot com
2021-05-07 8:38 ` cvs-commit at gcc dot gnu.org
` (4 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: ubizjak at gmail dot com @ 2021-05-06 14:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
--- Comment #10 from Uroš Bizjak <ubizjak at gmail dot com> ---
Following patch fixes the failures:
--cut here--
diff --git a/gcc/config/i386/i386-expand.c b/gcc/config/i386/i386-expand.c
index 4dfe7d6c282..61b2f921f41 100644
--- a/gcc/config/i386/i386-expand.c
+++ b/gcc/config/i386/i386-expand.c
@@ -3490,7 +3490,11 @@ static bool
ix86_use_mask_cmp_p (machine_mode mode, machine_mode cmp_mode,
rtx op_true, rtx op_false)
{
- if (GET_MODE_SIZE (mode) == 64)
+ int vector_size = GET_MODE_SIZE (mode);
+
+ if (vector_size < 16)
+ return false;
+ else if (vector_size == 64)
return true;
/* When op_true is NULL, op_false must be NULL, or vice versa. */
--cut here--
But perhaps 64bit V2SI, V4HI and V8QI vpcmp insns can be emulated via their
128bit versions?
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
` (9 preceding siblings ...)
2021-05-06 14:58 ` ubizjak at gmail dot com
@ 2021-05-07 8:38 ` cvs-commit at gcc dot gnu.org
2021-05-07 9:16 ` cvs-commit at gcc dot gnu.org
` (3 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-05-07 8:38 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:
https://gcc.gnu.org/g:323b18d54b960d3ef64f60ad20838ef958334dc0
commit r12-582-g323b18d54b960d3ef64f60ad20838ef958334dc0
Author: Jakub Jelinek <jakub@redhat.com>
Date: Fri May 7 10:37:52 2021 +0200
i386: Fix up 8-byte vcond* with -mxop [PR100445]
ix86_expand_sse_movcc has special TARGET_XOP handling and the recent
addition of support of v*cond* patterns for MMXMODEI modes results in
ICEs because the expected pattern doesn't exist. We can handle it
using 128-bit vpcmov (if we ignore the upper 64 bits like we ignore in
other TARGET_MMX_WITH_SSE support).
2021-05-07 Jakub Jelinek <jakub@redhat.com>
PR target/100445
* config/i386/mmx.md (*xop_pcmov_<mode>): New define_insn.
* gcc.target/i386/pr100445.c: New test.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
` (10 preceding siblings ...)
2021-05-07 8:38 ` cvs-commit at gcc dot gnu.org
@ 2021-05-07 9:16 ` cvs-commit at gcc dot gnu.org
2021-05-11 11:56 ` marxin at gcc dot gnu.org
` (2 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-05-07 9:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Uros Bizjak <uros@gcc.gnu.org>:
https://gcc.gnu.org/g:92f372f00936a549de2cb9764eee722bb07959ba
commit r12-583-g92f372f00936a549de2cb9764eee722bb07959ba
Author: Uros Bizjak <ubizjak@gmail.com>
Date: Fri May 7 11:15:07 2021 +0200
i386: Do not emit mask compares for mode sizes < 16 [PR100445]
Recent addition of v*cond* patterns for MMXMODEI modes allows 64bit MMX
modes to enter ix86_expand_sse_cmp. ix86_use_mask_cmp_p was not prepared
to reject mode sizes < 16, resulting in ICE due to unavailability of 64bit
masked PCOM instructions.
2021-05-07 Uroš Bizjak <ubizjak@gmail.com>
gcc/
PR target/100445
* config/i386/i386-expand.c (ix86_use_mask_cmp_p):
Return false for mode sizes < 16.
gcc/testsuite/
PR target/100445
* gcc.target/i386/pr100445-1.c: New test.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
` (11 preceding siblings ...)
2021-05-07 9:16 ` cvs-commit at gcc dot gnu.org
@ 2021-05-11 11:56 ` marxin at gcc dot gnu.org
2021-05-11 18:33 ` dcb314 at hotmail dot com
2021-05-11 18:35 ` jakub at gcc dot gnu.org
14 siblings, 0 replies; 16+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-05-11 11:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
Is it fixed now?
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
` (12 preceding siblings ...)
2021-05-11 11:56 ` marxin at gcc dot gnu.org
@ 2021-05-11 18:33 ` dcb314 at hotmail dot com
2021-05-11 18:35 ` jakub at gcc dot gnu.org
14 siblings, 0 replies; 16+ messages in thread
From: dcb314 at hotmail dot com @ 2021-05-11 18:33 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
--- Comment #14 from David Binderman <dcb314 at hotmail dot com> ---
AFAIK, yes. I didn't try out the gcc/testsuite, but I did try out
all the places (about 20) where fedora rawhide failed to build.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug target/100445] [12 Regression] ice during RTL pass: vregs
2021-05-06 10:33 [Bug target/100445] New: ice during RTL pass: vregs dcb314 at hotmail dot com
` (13 preceding siblings ...)
2021-05-11 18:33 ` dcb314 at hotmail dot com
@ 2021-05-11 18:35 ` jakub at gcc dot gnu.org
14 siblings, 0 replies; 16+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-05-11 18:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
.
^ permalink raw reply [flat|nested] 16+ messages in thread
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