Dear contributor,

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

In  arm-eabi cortex-m55 hard, after:
  | commit gcc-16-5269-ge359564db3ed
  | Author: Christophe Lyon <[email protected]>
  | Date:   Thu Sep 18 16:41:19 2025 +0000
  | 
  |     arm: add support for out of range shift amount in MVE asrl and lsll 
[PR122216]
  |     
  |     MVE asrl and lsll instructions have two variants:
  |     - immediate shift amount in the [1..32] range
  |     - shift amount in a register, where negative values reverse the
  | ... 34 lines of the commit log omitted.

Produces 238 regressions:
  | 
  | regressions.sum:
  | Running g++:g++.dg/compat/struct-layout-1.exp ...
  | FAIL: tmpdir-g++.dg-struct-layout-1/t001 
cp_compat_x_tst.o-cp_compat_y_tst.o execute
  | FAIL: tmpdir-g++.dg-struct-layout-1/t002 
cp_compat_x_tst.o-cp_compat_y_tst.o execute
  | FAIL: tmpdir-g++.dg-struct-layout-1/t003 
cp_compat_x_tst.o-cp_compat_y_tst.o execute
  | FAIL: tmpdir-g++.dg-struct-layout-1/t004 
cp_compat_x_tst.o-cp_compat_y_tst.o execute
  | ... and 243 more

Used configuration :
 *CI config* tcwg_gnu_embed_check_gcc arm-eabi -mthumb 
-march=armv8.1-m.main+mve.fp+fp.dp -mtune=cortex-m55 -mfloat-abi=hard -mfpu=auto
 *configure and test flags:* --target arm-eabi --disable-multilib 
--with-mode=thumb --with-arch=armv8.1-m.main+mve.fp+fp.dp --with-float=hard 
--target_board=-mthumb/-march=armv8.1-m.main+mve.fp+fp.dp/-mtune=cortex-m55/-mfloat-abi=hard/-mfpu=auto
 qemu-cpu=cortex-m55

We track this bug report under https://linaro.atlassian.net/browse/GNU-1791. 
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_m55_hard_eabi-build/1042/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_m55_hard_eabi-build/1042/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_m55_hard_eabi-build/1042/artifact/artifacts/sumfiles/xfails.xfail

Current build   : 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m55_hard_eabi-build/1042/artifact/artifacts
Reference build : 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m55_hard_eabi-build/1041/artifact/artifacts

Instruction to reproduce the build : 
https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/e359564db3ed1826931720aad7c977e1eed9c04c/tcwg_gnu_embed_check_gcc/master-thumb_m55_hard_eabi/reproduction_instructions.txt

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

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