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From: "malat at debian dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/111591] New: ppc64be: miscompilation with -mstrict-align
 / -O3
Date: Mon, 25 Sep 2023 11:53:16 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111591

            Bug ID: 111591
           Summary: ppc64be: miscompilation with -mstrict-align / -O3
           Product: gcc
           Version: 13.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: malat at debian dot org
  Target Milestone: ---

I am seeing a regression in highway unit test on ppc64be when using
-mstrict-align / -O3

454/530 Test #454:
HwyWidenMulTestGroup/HwyWidenMulTest.TestAllSatWidenMulPairwiseAdd/EMU128  #
GetParam() =3D 2305843009213693952 .............Subprocess aborted***Except=
ion:=20=20
0.00 sec
Running main() from ./googletest/src/gtest_main.cc
Note: Google Test filter =3D
HwyWidenMulTestGroup/HwyWidenMulTest.TestAllSatWidenMulPairwiseAdd/EMU128
[=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from HwyWidenMulTestGroup/HwyWidenMulTest
[ RUN      ]
HwyWidenMulTestGroup/HwyWidenMulTest.TestAllSatWidenMulPairwiseAdd/EMU128


i16x4 expect [0+ ->]:
  0x7FFF,0x7FFF,0x7FFF,0x7FFF,
i16x4 actual [0+ ->]:
  0x7FFF,0x01A5,0x7FFF,0x7FFF,
Abort at ./hwy/tests/widen_mul_test.cc:205: EMU128, i16x4 lane 1 mismatch:
expected '0x7FFF', got '0x01A5'.



ref:
https://buildd.debian.org/status/fetch.php?pkg=3Dhighway&arch=3Dppc64&ver=
=3D1.0.8%7Egit20230918.1e3a3d7-4&stamp=3D1695113957&raw=3D0=