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-16-5975-gfae0c626250
  | Author: Andrew Pinski <[email protected]>
  | Date:   Sat Dec 6 01:11:29 2025 -0800
  | 
  |     final_cleanup: Call make_forwarders_with_degenerate_phis [PR46555]
  |     
  |     This fixes a regression introduced with r16-5258-g1d8e2d51e5c5cb.
  |     With GCC 12+, we would not merge forwarders (with phis, vops included),
  |     this meant that after the last cddce, degenerate phis would stay not
  | ... 22 lines of the commit log omitted.

Produces 1 regression:
  | 
  | regressions.sum:
  | Running gcc:gcc.dg/tree-ssa/tree-ssa.exp ...
  | FAIL: gcc.dg/tree-ssa/pr46555.c scan-rtl-dump pro_and_epilogue "Performing 
shrink-wrapping"

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-1819. 
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/565/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/565/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/565/artifact/artifacts/sumfiles/xfails.xfail

Current build   : 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_eabi-build/565/artifact/artifacts
Reference build : 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_eabi-build/564/artifact/artifacts

Instruction to reproduce the build : 
https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/fae0c626250563c1619cc10c6af18a0c4cae5a97/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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