[Bug tree-optimization/119293] New: [15 Regression] gcc.dg/vect/vect-121.c fails since r15-6811-g086031c0585985

[stefansf at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119293

            Bug ID: 119293
           Summary: [15 Regression] gcc.dg/vect/vect-121.c fails since
                    r15-6811-g086031c0585985
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Keywords: testsuite-fail
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: stefansf at gcc dot gnu.org
  Target Milestone: ---
            Target: s390*-*-*, powerpc64le-*-*, x86_64-*-*

Created attachment 60753
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60753&action=edit
dump

FAIL: gcc.dg/vect/vect-121.c scan-tree-dump-not optimized "Invalid sum"
FAIL: gcc.dg/vect/vect-121.c -flto -ffat-lto-objects  scan-tree-dump-not
optimized "Invalid sum"

Bisect stopped at r15-6811-g086031c0585985

Tests do not only fail for s390x [1] but also for powerpc64le [2] and x86_64
[3].

[1] https://gcc.gnu.org/pipermail/gcc-testresults/2025-March/840821.html
[2] https://gcc.gnu.org/pipermail/gcc-testresults/2025-March/840872.html
[3] https://gcc.gnu.org/pipermail/gcc-testresults/2025-March/840862.html