Dear contributor,

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

In  arm-eabi cortex-m23 soft, after:
  | commit gcc-16-3414-gfcb3009a32d
  | Author: Tomasz KamiƄski <[email protected]>
  | Date:   Tue Aug 26 14:34:35 2025 +0200
  | 
  |     libsupc++: Change _Unordered comparison value to minimum value of 
signed char.
  |     
  |     For any minimum value of a signed type, its negation (with wraparound) 
results
  |     in the same value, behaving like zero. Representing the unordered 
result with
  |     this minimum value, along with 0 for equal, 1 for greater, and -1 for 
less
  | ... 25 lines of the commit log omitted.

Produces 9 regressions:
  | 
  | regressions.sum:
  | Running g++:g++.dg/dg.exp ...
  | FAIL: g++.dg/opt/pr94589-2.C -std=gnu++20  scan-tree-dump-times optimized 
"i_[0-9]+\\(D\\) (?:<|<=|==|!=|>|>=) 5\\.0" 12
  | FAIL: g++.dg/opt/pr94589-2.C -std=gnu++23  scan-tree-dump-times optimized 
"i_[0-9]+\\(D\\) (?:<|<=|==|!=|>|>=) 5\\.0" 12
  | FAIL: g++.dg/opt/pr94589-2.C -std=gnu++26  scan-tree-dump-times optimized 
"i_[0-9]+\\(D\\) (?:<|<=|==|!=|>|>=) 5\\.0" 12
  | FAIL: g++.dg/opt/pr94589-5.C -std=gnu++20  scan-tree-dump-times optimized 
"[ij]_[0-9]+\\(D\\) (?:<|<=|>|>=) [ij]_[0-9]+\\(D\\)" 8
  | ... and 5 more

Used configuration :
 *CI config* tcwg_gnu_embed_check_gcc arm-eabi -mthumb -march=armv8-m.base 
-mtune=cortex-m23 -mfloat-abi=soft -mfpu=auto
 *configure and test flags:* --target arm-eabi --disable-multilib 
--with-mode=thumb --with-cpu=cortex-m23 --with-float=soft 
--target_board=-mthumb/-march=armv8-m.base/-mtune=cortex-m23/-mfloat-abi=soft/-mfpu=auto
 qemu_cpu=cortex-m33

We track this bug report under https://linaro.atlassian.net/browse/GNU-1670. 
Please let us know if you have a fix.

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

-----------------8<--------------------------8<--------------------------8<--------------------------

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
 * 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_eabi-build/453/artifact/artifacts/00-sumfiles/
The full lists of regressions and improvements as well as configure and make 
commands are in
 * 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_eabi-build/453/artifact/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_eabi-build/453/artifact/artifacts/sumfiles/xfails.xfail

Current build   : 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_eabi-build/453/artifact/artifacts
Reference build : 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_eabi-build/452/artifact/artifacts

Instruction to reproduce the build : 
https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/fcb3009a32dc33906934a2360e556dfeb98980cf/tcwg_gnu_embed_check_gcc/master-thumb_m23_soft_eabi/reproduction_instructions.txt

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

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