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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/102857] New: [12 regression] r12-4526 caused
 regressions on vect/bb-slp-16.c and ssa-dom-thread-7.c
Date: Wed, 20 Oct 2021 12:40:02 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102857

            Bug ID: 102857
           Summary: [12 regression] r12-4526 caused regressions on
                    vect/bb-slp-16.c and ssa-dom-thread-7.c
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: clyon at gcc dot gnu.org
  Target Milestone: ---

r12-4526 (g:d8edfadfc7a9795b65177a50ce44fd348858e844) caused regressions.

On aarch64 and arm-none-linux-gnueabihf with-arch armv7-a+mp+sec+neon-fp16
FAIL: gcc.dg/vect/bb-slp-16.c execution test

On both aarch64/arm
FAIL: gcc.dg/tree-ssa/ssa-dom-thread-7.c scan-tree-dump thread3 "Jumps
threaded: 12"

On arm-none-linux-gnueabihf --with-arch armv7-a+mp+sec+neon-fp16
FAIL: gcc.target/arm/ivopts-4.c object-size text <=3D 36

The last one is very fragile and depends on the actual target/flags.=