[PATCH COMMITTED] Do not require memset elimination in explicit_bzero test

[Florian Weimer]

On 12/21/2016 07:04 PM, Florian Weimer wrote:
> On 12/20/2016 11:09 AM, Florian Weimer wrote:
>> Some targets fail to apply dead store elimination to the
>> memset call in setup_ordinary_clear.  Before this commit,
>> this causes the test case to fail.  Instead, the test case
>> now logs lack of memset elimination as an informational
>> message.
>>
>> 2016-12-20  Florian Weimer  <fweimer@redhat.com>
>>
>>     Do not require memset elimination in explicit_bzero test.
>>     * string/tst-xbzero-opt.c (prepare_test_buffer): Force inlining.
>>     (enum test_expectation): Add NO_EXPECTATIONS.
>>     (subtests): NO_EXPECTATIONS for ordinary clear.
>>     (check_test_buffer): Handle NO_EXPECTATIONS.
>>     * string/Makefile (CFLAGS-tst-xbzero-opt.c): Compile with -O3.
>
> Stefan, this test still fails for me on s390x:
>
> PASS: no clear/prepare: expected 32 got 32
> PASS: no clear/test: expected some got 32
> PASS: ordinary clear/prepare: expected 32 got 32
> INFO: ordinary clear/test: found 0 patterns (memset not eliminated)
> PASS: explicit clear/prepare: expected 32 got 32
> FAIL: explicit clear/test: expected 0 got 1
>
> Do you have an idea what's going on there?

I filed bug 21006 and will add it as a release blocker.

Thanks,
Florian