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* [Bug tree-optimization/114433] New: ICE: verify_ssa failed: definition in block 9 does not dominate use in block 8 with _BitInt() bitfield shift at -O1 and above
@ 2024-03-22 13:29 zsojka at seznam dot cz
2024-03-22 16:41 ` [Bug tree-optimization/114433] " jakub at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: zsojka at seznam dot cz @ 2024-03-22 13:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114433
Bug ID: 114433
Summary: ICE: verify_ssa failed: definition in block 9 does not
dominate use in block 8 with _BitInt() bitfield shift
at -O1 and above
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
CC: jakub at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 57778
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57778&action=edit
reduced testcase
Similar to PR114365
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O testcase.c
testcase.c: In function 'foo':
testcase.c:7:1: error: definition in block 9 does not dominate use in block 8
7 | foo()
| ^~~
for SSA_NAME: _12 in statement:
_38 = _12 >> 31;
during GIMPLE pass: bitintlower
testcase.c:7:1: internal compiler error: verify_ssa failed
0x177a70f verify_ssa(bool, bool)
/repo/gcc-trunk/gcc/tree-ssa.cc:1203
0x13cbd45 execute_function_todo
/repo/gcc-trunk/gcc/passes.cc:2095
0x13cc1ae execute_todo
/repo/gcc-trunk/gcc/passes.cc:2142
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
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-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r14-9610-20240322092442-gddd4a3ca874-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.1/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
--disable-bootstrap --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 --enable-libsanitizer
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r14-9610-20240322092442-gddd4a3ca874-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.1 20240322 (experimental) (GCC)
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/114433] ICE: verify_ssa failed: definition in block 9 does not dominate use in block 8 with _BitInt() bitfield shift at -O1 and above
2024-03-22 13:29 [Bug tree-optimization/114433] New: ICE: verify_ssa failed: definition in block 9 does not dominate use in block 8 with _BitInt() bitfield shift at -O1 and above zsojka at seznam dot cz
@ 2024-03-22 16:41 ` jakub at gcc dot gnu.org
2024-03-23 2:31 ` zsojka at seznam dot cz
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: jakub at gcc dot gnu.org @ 2024-03-22 16:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114433
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2024-03-22
Status|UNCONFIRMED |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 57782
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57782&action=edit
gcc14-pr114433.patch
Untested fix.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/114433] ICE: verify_ssa failed: definition in block 9 does not dominate use in block 8 with _BitInt() bitfield shift at -O1 and above
2024-03-22 13:29 [Bug tree-optimization/114433] New: ICE: verify_ssa failed: definition in block 9 does not dominate use in block 8 with _BitInt() bitfield shift at -O1 and above zsojka at seznam dot cz
2024-03-22 16:41 ` [Bug tree-optimization/114433] " jakub at gcc dot gnu.org
@ 2024-03-23 2:31 ` zsojka at seznam dot cz
2024-03-23 10:20 ` cvs-commit at gcc dot gnu.org
2024-03-23 10:21 ` jakub at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: zsojka at seznam dot cz @ 2024-03-23 2:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114433
--- Comment #2 from Zdenek Sojka <zsojka at seznam dot cz> ---
Created attachment 57786
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57786&action=edit
probably related, not fully reduced testcase
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/114433] ICE: verify_ssa failed: definition in block 9 does not dominate use in block 8 with _BitInt() bitfield shift at -O1 and above
2024-03-22 13:29 [Bug tree-optimization/114433] New: ICE: verify_ssa failed: definition in block 9 does not dominate use in block 8 with _BitInt() bitfield shift at -O1 and above zsojka at seznam dot cz
2024-03-22 16:41 ` [Bug tree-optimization/114433] " jakub at gcc dot gnu.org
2024-03-23 2:31 ` zsojka at seznam dot cz
@ 2024-03-23 10:20 ` cvs-commit at gcc dot gnu.org
2024-03-23 10:21 ` jakub at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2024-03-23 10:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114433
--- Comment #3 from GCC 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:4a46a48ebc7b7b3976af49f6f8dabd65c6ddf64b
commit r14-9641-g4a46a48ebc7b7b3976af49f6f8dabd65c6ddf64b
Author: Jakub Jelinek <jakub@redhat.com>
Date: Sat Mar 23 11:20:00 2024 +0100
bitint: Fix bitfield loads in handle_cast [PR114433]
We ICE on the following testcase, because handle_cast was incorrectly
testing !m_first to see whether it should use m_data[m_bitfld_load + 1]
or fresh SSA_NAME for a PHI result.
Now, m_first is in the routine sometimes temporarily cleared in between
doing prepare_data_in_out and the !m_first check and only before returning
restored from the save_first copy.
Without this patch, we try to use the same SSA_NAME (_12 here) in 2
different PHI results which is obviously invalid IL and ICEs very quickly.
2024-03-23 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/114433
* gimple-lower-bitint.cc (bitint_large_huge::handle_cast): For
m_bitfld_load check save_first rather than m_first.
* gcc.dg/torture/bitint-68.c: New test.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/114433] ICE: verify_ssa failed: definition in block 9 does not dominate use in block 8 with _BitInt() bitfield shift at -O1 and above
2024-03-22 13:29 [Bug tree-optimization/114433] New: ICE: verify_ssa failed: definition in block 9 does not dominate use in block 8 with _BitInt() bitfield shift at -O1 and above zsojka at seznam dot cz
` (2 preceding siblings ...)
2024-03-23 10:20 ` cvs-commit at gcc dot gnu.org
@ 2024-03-23 10:21 ` jakub at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jakub at gcc dot gnu.org @ 2024-03-23 10:21 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114433
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |14.0
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 5+ messages in thread
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2024-03-22 13:29 [Bug tree-optimization/114433] New: ICE: verify_ssa failed: definition in block 9 does not dominate use in block 8 with _BitInt() bitfield shift at -O1 and above zsojka at seznam dot cz
2024-03-22 16:41 ` [Bug tree-optimization/114433] " jakub at gcc dot gnu.org
2024-03-23 2:31 ` zsojka at seznam dot cz
2024-03-23 10:20 ` cvs-commit at gcc dot gnu.org
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