[Linaro-TCWG-CI] gcc-15-1239-g6669dc51515: Failure on aarch64

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Dear contributor, our automatic CI has detected problems related to your patch(es).  Please find some details below.  If you have any questions, please follow up on linaro-toolchain@lists.linaro.org mailing list, Libera's #linaro-tcwg channel, or ping your favourite Linaro toolchain developer on the usual project channel.

We appreciate that it might be difficult to find the necessary logs or reproduce the issue locally. If you can't get what you need from our CI within minutes, let us know and we will be happy to help.

We track this report status in https://linaro.atlassian.net/browse/GNU-1256 , please let us know if you are looking at the problem and/or when you have a fix.

In bootstrap_build master-aarch64-bootstrap after:

  | commit gcc-15-1239-g6669dc51515
  | Author: Richard Biener <rguenther@suse.de>
  | Date:   Fri Jun 7 14:47:12 2024 +0200
  | 
  |     tree-optimization/115385 - handle more gaps with peeling of a single iteration
  |     
  |     The following makes peeling of a single scalar iteration handle more
  |     gaps, including non-power-of-two cases.  This can be done by rounding
  |     up the remaining access to the next power-of-two which ensures that
  |     the next scalar iteration will pick at least the number of excess
  |     elements we access.
  | ... 13 lines of the commit log omitted.

Results changed to
# reset_artifacts:
-10
# true:
0
# build_abe bootstrap:
# FAILED
# First few build errors in logs:
# 00:20:58 /home/tcwg-buildslave/workspace/tcwg_gnu_5/abe/snapshots/gcc.git~master/gcc/hwint.h:266:17: error: ‘remain.poly_int<2, long unsigned int>::coeffs[0]’ may be used uninitialized [-Werror=maybe-uninitialized]
# 00:20:58 /home/tcwg-buildslave/workspace/tcwg_gnu_5/abe/snapshots/gcc.git~master/gcc/poly-int.h:557:7: error: ‘remain.poly_int<2, long unsigned int>::coeffs[1]’ may be used uninitialized [-Werror=maybe-uninitialized]
# 00:21:48 make[3]: *** [Makefile:1199: tree-vect-stmts.o] Error 1
# 00:21:48 make[2]: *** [Makefile:5100: all-stage2-gcc] Error 2
# 00:21:48 make[1]: *** [Makefile:25572: stage2-bubble] Error 2
# 00:21:48 make: *** [Makefile:1103: all] Error 2

From
# reset_artifacts:
-10
# true:
0
# build_abe bootstrap:
1

The configuration of this build is:
CI config tcwg_bootstrap_build master-aarch64-bootstrap

-----------------8<--------------------------8<--------------------------8<--------------------------
The information below can be used to reproduce a debug environment:

Current build   : https://ci.linaro.org/job/tcwg_bootstrap_build--master-aarch64-bootstrap-build/489/artifact/artifacts
Reference build : https://ci.linaro.org/job/tcwg_bootstrap_build--master-aarch64-bootstrap-build/488/artifact/artifacts

Reproduce last good and first bad builds: https://git-us.linaro.org/toolchain/ci/interesting-commits.git/plain/gcc/sha1/6669dc51515313dd1e60c493596dbc90429fc362/tcwg_bootstrap_build/master-aarch64-bootstrap/reproduction_instructions.txt

Full commit : https://github.com/gcc-mirror/gcc/commit/6669dc51515313dd1e60c493596dbc90429fc362

List of configurations that regressed due to this commit :
* tcwg_bootstrap_build
** master-aarch64-bootstrap
*** Failure
*** https://git-us.linaro.org/toolchain/ci/interesting-commits.git/plain/gcc/sha1/6669dc51515313dd1e60c493596dbc90429fc362/tcwg_bootstrap_build/master-aarch64-bootstrap/details.txt
*** https://ci.linaro.org/job/tcwg_bootstrap_build--master-aarch64-bootstrap-build/489/artifact/artifacts