Dear contributor,

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

In simplebootstrap_build master-arm-bootstrap, after:
  | commit gcc-16-2614-g965564eafb72
  | Author: Richard Sandiford <richard.sandiford@arm.com>
  | Date:   Tue Jul 29 15:58:34 2025 +0100
  | 
  |     simplify-rtx: Simplify subregs of logic ops
  |     
  |     This patch adds a new rule for distributing lowpart subregs through
  |     ANDs, IORs, and XORs with a constant, in cases where one of the terms
  |     then disappears.  For example:
  | ... 30 lines of the commit log omitted.

Produces Failure:
  | Results changed to
  | # reset_artifacts:
  | -10
  | # true:
  | 0
  | # build_abe bootstrap:
  | # FAILED
  | # First few build errors in logs:
  | # 00:06:08 cc1: internal compiler error: in assert_rtx_eq_at, at selftest-rtl.cc:57
  | # 00:06:08 make[3]: *** [/home/tcwg-buildslave/workspace/tcwg_gnu_0/abe/snapshots/gcc.git~master/gcc/c/Make-lang.in:152: s-selftest-c] Error 1
  | # 00:06:08 make[2]: *** [Makefile:5079: all-stage1-gcc] Error 2
  | # 00:06:08 make[1]: *** [Makefile:25557: stage1-bubble] Error 2
  | # 00:06:08 make: *** [Makefile:1106: all] Error 2
  | # First few build errors in logs:
  | # 00:06:08 cc1: internal compiler error: in assert_rtx_eq_at, at selftest-rtl.cc:57
  | # 00:06:08 make[3]: *** [/home/tcwg-buildslave/workspace/tcwg_gnu_0/abe/snapshots/gcc.git~master/gcc/c/Make-lang.in:152: s-selftest-c] Error 1
  | # 00:06:08 make[2]: *** [Makefile:5079: all-stage1-gcc] Error 2
  | # 00:06:08 make[1]: *** [Makefile:25557: stage1-bubble] Error 2
  | # 00:06:08 make: *** [Makefile:1106: all] Error 2
  | 
  | From
  | # reset_artifacts:
  | -10
  | # true:
  | 0
  | # build_abe bootstrap:
  | 1

Used configuration :
 *CI config* tcwg_simplebootstrap_build master-arm-bootstrap
 *configure and test flags:* none, autodetected on armv8l-unknown-linux-gnueabihf

We track this bug report under https://linaro.atlassian.net/browse/GNU-1685. 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.

-----------------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
 * https://ci.linaro.org/job/tcwg_simplebootstrap_build--master-arm-bootstrap-build/672/artifact/artifacts/
The full lists of regressions and improvements as well as configure and make commands are in
 * https://ci.linaro.org/job/tcwg_simplebootstrap_build--master-arm-bootstrap-build/672/artifact/artifacts/notify/

Current build   : https://ci.linaro.org/job/tcwg_simplebootstrap_build--master-arm-bootstrap-build/672/artifact/artifacts
Reference build : https://ci.linaro.org/job/tcwg_simplebootstrap_build--master-arm-bootstrap-build/671/artifact/artifacts

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/965564eafb721f8000013a3112f1bba8d8fae32b/tcwg_simplebootstrap_build/master-arm-bootstrap/reproduction_instructions.txt

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