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* [Bug target/94438] New: [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl
@ 2020-04-01 10:47 zsojka at seznam dot cz
2020-04-01 11:12 ` [Bug target/94438] " jakub at gcc dot gnu.org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: zsojka at seznam dot cz @ 2020-04-01 10:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94438
Bug ID: 94438
Summary: [8/9/10 Regression] ICE: verify_gimple failed:
position plus size exceeds size of referenced object
in 'bit_field_ref' with -mavx512vbmi -mavx512vl
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Created attachment 48161
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48161&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -mavx512vbmi -mavx512vl testcase.c
testcase.c: In function 'foo':
testcase.c:4:1: error: position plus size exceeds size of referenced object in
'bit_field_ref'
4 | foo (void)
| ^~~
_8 = BIT_FIELD_REF <_7, 128, 0>;
during GIMPLE pass: veclower
testcase.c:4:1: internal compiler error: verify_gimple failed
0x102b7aa verify_gimple_in_cfg(function*, bool)
/repo/gcc-trunk/gcc/tree-cfg.c:5459
0xeed15f execute_function_todo
/repo/gcc-trunk/gcc/passes.c:1985
0xeedfac do_per_function
/repo/gcc-trunk/gcc/passes.c:1640
0xeedfac execute_todo
/repo/gcc-trunk/gcc/passes.c:2039
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r10-7475-20200331110822-g1ef979c6966-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/10.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r10-7475-20200331110822-g1ef979c6966-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.0.1 20200331 (experimental) (GCC)
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/94438] [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl
2020-04-01 10:47 [Bug target/94438] New: [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl zsojka at seznam dot cz
@ 2020-04-01 11:12 ` jakub at gcc dot gnu.org
2020-04-01 11:18 ` jakub at gcc dot gnu.org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2020-04-01 11:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94438
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2020-04-01
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Adjusted testcase so that it doesn't use uninitialized var:
typedef __attribute__ ((__vector_size__ (sizeof (__int128)))) __int128 V;
void
foo (V w)
{
V v = 0 <= (0 >= w);
}
And:
typedef __attribute__ ((__vector_size__ (4 * sizeof (__int128)))) __int128 V;
void
foo (V w)
{
V v = 0 <= (0 >= w);
}
ICEs in another spot (only -mavx512vbmi is needed for this one):
during RTL pass: expand
pr94438-2.c: In function ‘foo’:
pr94438-2.c:6:11: internal compiler error: in expand_vec_cond_expr, at
optabs.c:5884
6 | V v = 0 <= (0 >= w);
| ~~^~~~~~~~~~~
0x10edd07 expand_vec_cond_expr(tree_node*, tree_node*, tree_node*, tree_node*,
rtx_def*)
../../gcc/optabs.c:5882
0xd20e4b do_store_flag
../../gcc/expr.c:12148
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/94438] [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl
2020-04-01 10:47 [Bug target/94438] New: [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl zsojka at seznam dot cz
2020-04-01 11:12 ` [Bug target/94438] " jakub at gcc dot gnu.org
@ 2020-04-01 11:18 ` jakub at gcc dot gnu.org
2020-04-02 15:24 ` jakub at gcc dot gnu.org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2020-04-01 11:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94438
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.5
Priority|P3 |P2
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Both testcases ICE since r7-1075-g0561bcfb825ec512375f06c5b2199d44263832cb.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/94438] [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl
2020-04-01 10:47 [Bug target/94438] New: [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl zsojka at seznam dot cz
2020-04-01 11:12 ` [Bug target/94438] " jakub at gcc dot gnu.org
2020-04-01 11:18 ` jakub at gcc dot gnu.org
@ 2020-04-02 15:24 ` jakub at gcc dot gnu.org
2020-04-08 16:25 ` cvs-commit at gcc dot gnu.org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2020-04-02 15:24 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94438
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 #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 48172
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48172&action=edit
gcc10-pr94438.patch
Untested fix. It seems completely wrong to try to use int masks for V*TImode,
the hook correctly only supports V*[SD]Imode if not -mavx512bw, but with
-mavx512bw it just doesn't check elem_size at all.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/94438] [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl
2020-04-01 10:47 [Bug target/94438] New: [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl zsojka at seznam dot cz
` (2 preceding siblings ...)
2020-04-02 15:24 ` jakub at gcc dot gnu.org
@ 2020-04-08 16:25 ` cvs-commit at gcc dot gnu.org
2020-04-08 16:26 ` [Bug target/94438] [8/9 " jakub at gcc dot gnu.org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-04-08 16:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94438
--- Comment #4 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:8bf5faa9c463f0d53ffe835ba03d4502edfb959d
commit r10-7632-g8bf5faa9c463f0d53ffe835ba03d4502edfb959d
Author: Jakub Jelinek <jakub@redhat.com>
Date: Wed Apr 8 18:24:12 2020 +0200
i386: Don't use AVX512F integral masks for V*TImode [PR94438]
The ix86_get_mask_mode hook uses int mask for 512-bit vectors or
128/256-bit
vectors with AVX512VL (that is correct), and only for V*[SD][IF]mode if not
AVX512BW (also correct), but with AVX512BW it would stop checking the
elem_size altogether and pretend the hw has masking support for V*TImode
etc., which it doesn't. That can lead to various ICEs later on.
2020-04-08 Jakub Jelinek <jakub@redhat.com>
PR target/94438
* config/i386/i386.c (ix86_get_mask_mode): Only use int mask for
elem_size
1, 2, 4 and 8.
* gcc.target/i386/avx512bw-pr94438.c: New test.
* gcc.target/i386/avx512vlbw-pr94438.c: New test.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/94438] [8/9 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl
2020-04-01 10:47 [Bug target/94438] New: [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl zsojka at seznam dot cz
` (3 preceding siblings ...)
2020-04-08 16:25 ` cvs-commit at gcc dot gnu.org
@ 2020-04-08 16:26 ` jakub at gcc dot gnu.org
2020-09-16 19:20 ` cvs-commit at gcc dot gnu.org
2020-09-17 17:25 ` jakub at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2020-04-08 16:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94438
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9/10 Regression] ICE: |[8/9 Regression] ICE:
|verify_gimple failed: |verify_gimple failed:
|position plus size exceeds |position plus size exceeds
|size of referenced object |size of referenced object
|in 'bit_field_ref' with |in 'bit_field_ref' with
|-mavx512vbmi -mavx512vl |-mavx512vbmi -mavx512vl
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/94438] [8/9 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl
2020-04-01 10:47 [Bug target/94438] New: [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl zsojka at seznam dot cz
` (4 preceding siblings ...)
2020-04-08 16:26 ` [Bug target/94438] [8/9 " jakub at gcc dot gnu.org
@ 2020-09-16 19:20 ` cvs-commit at gcc dot gnu.org
2020-09-17 17:25 ` jakub at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-09-16 19:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94438
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:
https://gcc.gnu.org/g:cb09410d3c61d325c64b17eabe9dfd1609cec1a6
commit r9-8876-gcb09410d3c61d325c64b17eabe9dfd1609cec1a6
Author: Jakub Jelinek <jakub@redhat.com>
Date: Wed Apr 8 18:24:12 2020 +0200
i386: Don't use AVX512F integral masks for V*TImode [PR94438]
The ix86_get_mask_mode hook uses int mask for 512-bit vectors or
128/256-bit
vectors with AVX512VL (that is correct), and only for V*[SD][IF]mode if not
AVX512BW (also correct), but with AVX512BW it would stop checking the
elem_size altogether and pretend the hw has masking support for V*TImode
etc., which it doesn't. That can lead to various ICEs later on.
2020-04-08 Jakub Jelinek <jakub@redhat.com>
PR target/94438
* config/i386/i386.c (ix86_get_mask_mode): Only use int mask for
elem_size
1, 2, 4 and 8.
* gcc.target/i386/avx512bw-pr94438.c: New test.
* gcc.target/i386/avx512vlbw-pr94438.c: New test.
(cherry picked from commit 8bf5faa9c463f0d53ffe835ba03d4502edfb959d)
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/94438] [8/9 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl
2020-04-01 10:47 [Bug target/94438] New: [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl zsojka at seznam dot cz
` (5 preceding siblings ...)
2020-09-16 19:20 ` cvs-commit at gcc dot gnu.org
@ 2020-09-17 17:25 ` jakub at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2020-09-17 17:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94438
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.5 in r8-10485-g212ae35e5a9b554748c1340015968fda1d1fa0d8 and by the
above commit for 9.4+ too.
^ permalink raw reply [flat|nested] 8+ messages in thread
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2020-04-01 10:47 [Bug target/94438] New: [8/9/10 Regression] ICE: verify_gimple failed: position plus size exceeds size of referenced object in 'bit_field_ref' with -mavx512vbmi -mavx512vl zsojka at seznam dot cz
2020-04-01 11:12 ` [Bug target/94438] " jakub at gcc dot gnu.org
2020-04-01 11:18 ` jakub at gcc dot gnu.org
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