[PATCH 2/3] Run profile feedback tests with autofdo

[Bin.Cheng]

On Thu, Jul 14, 2016 at 11:33 PM, Andi Kleen <andi@firstfloor.org> wrote:
>> >> I haven't seen that. Unstable in what way?
>> > For GCC doesn't support FDO, it run below tests as you said:
>> >
>> > PASS: gcc.dg/tree-prof/20041218-1.c compilation,  -g
>> > UNSUPPORTED: gcc.dg/tree-prof/20041218-1.c: Cannot run create_gcov
>> > --binary /data/work/trunk/build/gcc/testsuite/gcc/20041218-1.gcda
>> >
>> > Normally, it doesn't create gcov data file, thus the next test is
>> > unsupported.  I guess in parallel test, the second test picks up gcov
>> > data files from other process, which results in random pass.
>> > Is it possible to not have these when fdo is supported?
>> Hmm, typo:  s/supported/not supported/.
>
> I don't see how this can happen: as you can see the .gcda file name
> is unique for each test case.
>
> I think there may be problems with the perf.data, could add a postfix.
> But you should only see that with real autofdo.
Don't know.  I only configured/built GCC on x86_64 with below command lines:

$ ../gcc/configure --prefix=...
--enable-languages=c,c++,fortran,go,java,lto,objc,obj-c++
--with-build-config=bootstrap-O3 --disable-werror
$ make && make install

Not sure what the status for autofdo is in this case.  "make check -k"
is stable for me, but "make check -k -j#" gives unstable result in
tree-prof.exp tests.  Anything I did wrong?

Thanks,
bin