Dear contributor,

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

In  arm-linux-gnueabihf cross, after:
  | commit gcc-17-2315-g0ac16fdbee15
  | Author: Pengfei Li <[email protected]>
  | Date:   Tue Jul 7 15:09:53 2026 +0000
  | 
  |     match.pd: Eliminate dead operand in vector permute and insert patterns
  |     
  |     When shifting a vector by one element and then inserting a new element
  |     into the vacated lane, GIMPLE can contain a VEC_PERM_EXPR followed by a
  |     BIT_INSERT_EXPR. For example, the testcase in this patch has:
  | ... 31 lines of the commit log omitted.

Produces 1 regression:
  | 
  | regressions.sum:
  | Running gcc:gcc.dg/dg.exp ...
  | FAIL: gcc.dg/fold-vecperm-insert-1.c scan-tree-dump-times forwprop3 
"VEC_PERM_EXPR.*v_[0-9]+.*v_[0-9]+" 1

Used configuration :
 *CI config* tcwg_gnu_cross_check_gcc arm-linux-gnueabihf cross
 *configure and test flags:* --target arm-linux-gnueabihf --disable-multilib 
--with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb --with-tune=cortex-a9 
--with-arch=armv7-a

We track this bug report under https://linaro.atlassian.net/browse/GNU-1963. 
(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_cross_check_gcc--master-arm-build/builds/10214/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_cross_check_gcc--master-arm-build/builds/10214/archive/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * 
http://54.172.246.49:9090/jobs/tcwg_gnu_cross_check_gcc--master-arm-build/builds/10214/archive/artifacts/sumfiles/xfails.xfail

Current build   : 
http://54.172.246.49:9090/jobs/tcwg_gnu_cross_check_gcc--master-arm-build/builds/10214/archive/artifacts/
Reference build : 
http://54.172.246.49:9090/jobs/tcwg_gnu_cross_check_gcc--master-arm-build/builds/10213/archive/artifacts/

Instruction to reproduce the build : 
https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/0ac16fdbee1509efe9cbdee89ae9fa7be9b87e78/tcwg_gnu_cross_check_gcc/master-arm/reproduction_instructions.txt

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

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