Re: [Linaro-TCWG-CI] gcc-17-761-g44c5f9a37aa: 4 regressions on master-thumb_m55_hard_eabi

Fixed with https://gcc.gnu.org/pipermail/gcc-cvs/2026-May/454624.html

On Fri, May 29, 2026 at 2:26 AM <[email protected]> wrote:
>
> 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-17-761-g44c5f9a37aa
>   | Author: Andrew Pinski <[email protected]>
>   | Date:   Mon May 25 12:44:48 2026 -0700
>   |
>   |     match: Fix up `(smaller)a ==/!= (smaller) b` pattern for pointers [PR125453]
>   |
>   |     While reviewing r17-632-g1c9808a71207eb, I missed that it was valid (in gimple)
>   |     to cast from a pointer to a smaller integral type. That meant with that
>   |     pattern we would get `ptr ^ ptr` which is invalid gimple.
>   | ... 16 lines of the commit log omitted.
>
> Produces 4 regressions:
>   |
>   | regressions.sum:
>   | Running gcc:gcc.dg/torture/dg-torture.exp ...
>   | FAIL: gcc.dg/torture/pr125453-1.c -O2  (test for excess errors)
>   | FAIL: gcc.dg/torture/pr125453-1.c -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
>   | FAIL: gcc.dg/torture/pr125453-1.c -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess errors)
>   | FAIL: gcc.dg/torture/pr125453-1.c -O3 -g  (test for excess errors)
>
> 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-1915. (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.
>
> -----------------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
>  * http://54.172.246.49:9090/jobs/tcwg_gnu_embed_check_gcc--master-thumb_m55_hard_eabi-build/builds/10044/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_m55_hard_eabi-build/builds/10044/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_m55_hard_eabi-build/builds/10044/archive/artifacts/sumfiles/xfails.xfail
>
> Current build   : http://54.172.246.49:9090/jobs/tcwg_gnu_embed_check_gcc--master-thumb_m55_hard_eabi-build/builds/10044/archive/artifacts/
> Reference build : http://54.172.246.49:9090/jobs/tcwg_gnu_embed_check_gcc--master-thumb_m55_hard_eabi-build/builds/10043/archive/artifacts/
>
> Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/44c5f9a37aa3dffac654c743147021df917daab0/tcwg_gnu_embed_check_gcc/master-thumb_m55_hard_eabi/reproduction_instructions.txt
>
> Full commit : See in git+ssh://[email protected]/git/gcc.git