[Linaro-TCWG-CI] gcc-17-2390-gdeb5f74feea: 4 regressions on master-thumb_m0_soft_eabi

ci_notify--- via Gcc-regression <[email protected]> Mon, 27 Jul 2026 07:46:03 +0000 (UTC)
Newsgroups gmane.comp.gcc.regression
Message-ID <712169214.89685.1785138364556@72d3563a6d18>
Dear contributor,

Our automatic CI has detected problems related to your patch(es). Please find some details below.

In  arm-eabi cortex-m0 soft, after:
  | commit gcc-17-2390-gdeb5f74feea
  | Author: Jakub Jelinek <[email protected]>
  | Date:   Tue Jul 14 10:41:08 2026 +0200
  | 
  |     c-family: Use CAS loop instead of RMW atomics on small _BitInt with padding on targets which need to extend [PR124948]
  |     
  |     Some atomic/sync builtins don't sign or zero extend _BitInt values
  |     with padding in it.
  |     IMNSHO this is solely about some of the type-generic atomic/sync builtins
  | ... 19 lines of the commit log omitted.

Produces 4 regressions:
  | 
  | regressions.sum:
  | Running gcc:gcc.dg/torture/dg-torture.exp ...
  | FAIL: gcc.dg/torture/bitint-100.c -O0  (test for excess errors)
  | UNRESOLVED: gcc.dg/torture/bitint-100.c -O0  compilation failed to produce executable
  | FAIL: gcc.dg/torture/bitint-100.c -O2  (test for excess errors)
  | UNRESOLVED: gcc.dg/torture/bitint-100.c -O2  compilation failed to produce executable

Used configuration :
 *CI config* tcwg_gnu_embed_check_gcc arm-eabi -mthumb -march=armv6s-m -mtune=cortex-m0 -mfloat-abi=soft -mfpu=auto
 *configure and test flags:* --target arm-eabi --disable-multilib --with-mode=thumb --with-cpu=cortex-m0 --with-float=soft --target_board=-mthumb/-march=armv6s-m/-mtune=cortex-m0/-mfloat-abi=soft/-mfpu=auto qemu_cpu=cortex-m0

We track this bug report under https://linaro.atlassian.net/browse/GNU-1979. (Require Linaro login) Please let us know if you have a fix.

If you have any questions regarding this report, please ask on [email protected] mailing list.

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The information below contains the details of the failures, and the ways to reproduce a debug environment:

You can find the failure logs in *.log.1.xz files in
 * http://54.172.246.49:9090/jobs/tcwg_gnu_embed_check_gcc--master-thumb_m0_soft_eabi-build/builds/10125/archive/artifacts/00-sumfiles/
The full lists of regressions and improvements as well as configure and make commands are in
 * http://54.172.246.49:9090/jobs/tcwg_gnu_embed_check_gcc--master-thumb_m0_soft_eabi-build/builds/10125/archive/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * http://54.172.246.49:9090/jobs/tcwg_gnu_embed_check_gcc--master-thumb_m0_soft_eabi-build/builds/10125/archive/artifacts/sumfiles/xfails.xfail

Current build   : http://54.172.246.49:9090/jobs/tcwg_gnu_embed_check_gcc--master-thumb_m0_soft_eabi-build/builds/10125/archive/artifacts/
Reference build : http://54.172.246.49:9090/jobs/tcwg_gnu_embed_check_gcc--master-thumb_m0_soft_eabi-build/builds/10124/archive/artifacts/

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/deb5f74feeaf3a43f6d4008a1e01fc4d23c1efdf/tcwg_gnu_embed_check_gcc/master-thumb_m0_soft_eabi/reproduction_instructions.txt

Full commit : See in git+ssh://[email protected]/git/gcc.git