Dear contributor,

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

In  aarch64 native, after:
  | commit gcc-17-4165-gb5a11752dcb
  | Author: Kyrylo Tkachov <ktkachov@nvidia.com>
  | Date:   Thu Sep 3 18:27:37 2026 +0200
  | 
  |     tree-optimization: Use reference parameter bounds in trap analysis
  |     
  |     A REFERENCE_TYPE parameter that refers to an object designates an object that
  |     is at least as large as its referred-to type.  A method's this parameter
  |     designates an object that is at least as large as TYPE_METHOD_BASETYPE.
  | ... 54 lines of the commit log omitted.

Produces 7 regressions:
  | 
  | regressions.sum:
  | Running g++:g++.dg/dg.exp ...
  | FAIL: c-c++-common/strub-mem-notrap.c -std=gnu++20  scan-rtl-dump expand "\\(mem/f:[^\\n]*watermark_ptr"
  | FAIL: c-c++-common/strub-mem-notrap.c -std=gnu++29  scan-rtl-dump expand "\\(mem/f:[^\\n]*watermark_ptr"
  | FAIL: c-c++-common/strub-mem-notrap.c -std=gnu++98  scan-rtl-dump expand "\\(mem/f:[^\\n]*watermark_ptr"
  | FAIL: g++.dg/tree-ssa/noncall-store-builtin.C -std=gnu++20  scan-rtl-dump-not expand "\\(set[ \\t\\n]+\\(mem(?:/[a-z])*/c(?:/[a-z])*:"
  | ... and 4 more

Used configuration :
 *CI config* tcwg_gcc_check aarch64-linux-gnu
 *configure and test flags:* none, autodetected on aarch64-unknown-linux-gnu--disable-multilib --enable-fix-cortex-a53-835769 --enable-fix-cortex-a53-843419 --with-arch=armv8-a

We track this bug report under https://linaro.atlassian.net/browse/GNU-2035. (Require Linaro login) Please let us know if you have a fix.

If you have any questions regarding this report, please ask on linaro-toolchain@lists.linaro.org mailing list.

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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_gcc_check--master-aarch64-build/builds/10616/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_gcc_check--master-aarch64-build/builds/10616/archive/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10616/archive/artifacts/sumfiles/xfails.xfail

Current build   : http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10616/archive/artifacts/
Reference build : http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10615/archive/artifacts/

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/b5a11752dcb093fd0f9ce4c205a14acf9dbe702a/tcwg_gcc_check/master-aarch64/reproduction_instructions.txt

Full commit : See in git+ssh://linaroci@gcc.gnu.org/git/gcc.git