Dear contributor,

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

In  arm-eabi v7-a softfp, after:
  | commit gcc-16-5161-gc4ca512358b
  | Author: Dhruv Chawla <[email protected]>
  | Date:   Thu Aug 21 02:06:07 2025 -0700
  | 
  |     match.pd: Fold (y << x) <rel op> x -> 0 or 1
  |     
  |     - (y << x) == x -> 0 when y != 0
  |     - (y << x) {<,<=} x -> 0 when y > 0.
  |     - (y << x) != x -> 1 when y != 0.
  | ... 16 lines of the commit log omitted.

Produces 2 regressions:
  | 
  | regressions.sum:
  | Running gcc:gcc.dg/dg.exp ...
  | FAIL: gcc.dg/match-shift-cmp-4.c scan-tree-dump-times optimized "return 0;" 
18
  | FAIL: gcc.dg/match-shift-cmp-4.c scan-tree-dump-times optimized "return 1;" 
18

Used configuration :
 *CI config* tcwg_gnu_embed_check_gcc arm-eabi -marm -march=armv7-a 
-mfpu=vfpv3-d16 -mfloat-abi=softfp
 *configure and test flags:* --target arm-eabi --disable-multilib 
--with-mode=arm --with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=softfp 
--target_board=-marm/-march=armv7-a/-mfpu=vfpv3-d16/-mfloat-abi=softfp 
qemu_cpu=cortex-a9

We track this bug report under https://linaro.atlassian.net/browse/GNU-1754. 
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-arm_v7a_softfp_eabi-build/1034/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-arm_v7a_softfp_eabi-build/1034/artifact/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-arm_v7a_softfp_eabi-build/1034/artifact/artifacts/sumfiles/xfails.xfail

Current build   : 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-arm_v7a_softfp_eabi-build/1034/artifact/artifacts
Reference build : 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-arm_v7a_softfp_eabi-build/1033/artifact/artifacts

Instruction to reproduce the build : 
https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/c4ca512358be7cb1c8523f148fa84a57cbbf0060/tcwg_gnu_embed_check_gcc/master-arm_v7a_softfp_eabi/reproduction_instructions.txt

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

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