For help:Unexpected fail about testsuite of GCC

[U.Mutlu]

U.Mutlu wrote on 07/06/2018 12:45 PM:
> Hello CL,
>
> [as said, I'm new to the gcc testsuite, much like you, so take my answer with
> grain of salt, or so to say :-)]
>
>
> In your original posting you had this failing example:
> 'FAIL: g++.dg/pr80481.C  -std=gnu++14  scan-assembler-not vmovaps'
>
> The test source file pr80481.C is in the source directory under:
>    $ find ../gcc_trunk/ -iname "pr80481.C" -print
>    ../gcc_trunk/gcc/testsuite/g++.dg/pr80481.C
> and is handled by the make-target "check-c++" (see the log file of "make -k
> check"; you have to save that log file for reference & searching...).
>
> So, now in the next step you have to make the following test that will
> test just the "check-c++" category of the tests but with the additional
> flags "RUNTESTFLAGS="-v -v" as it will give more verbosity in the log file:
>    make -k check-c++ RUNTESTFLAGS="-v -v"
> And again redirect the output into a log file for analysis.
>
> It takes a long time (maybe one better should use the make -j
> to use parallelization, ie. using all CPU cores for the tests).
>
> The log file will give indication under which conditions that test fails.
>
> I'm running this test myself now, it has not finished yet.
> Here, you can find additional info (see under the section "Increase the
> verbosity":
> https://gcc.gnu.org/wiki/Testing_GCC


Ok, here are the first results of this bug hunting session:

The above said FAIL case seems to be related to these errors:

/sw/src/gcc_dev/gcc_trunk/gcc/testsuite/g++.dg/spellcheck-identifiers-2.C:12:10: 
error: 'ssacnf' was not declared in this scope
/sw/src/gcc_dev/gcc_trunk/gcc/testsuite/g++.dg/spellcheck-identifiers-2.C:32:10: 
error: 'sacnf' was not declared in this scope
/sw/src/gcc_dev/gcc_trunk/gcc/testsuite/g++.dg/spellcheck-reswords.C:3:3: 
error: 'forget' was not declared in this scope
/sw/src/gcc_dev/gcc_trunk/gcc/testsuite/g++.dg/spellcheck-reswords.C:9:3: 
error: 'memset' was not declared in this scope

as these errors happen between the following markers in the log:

  363945 Testing g++.dg/pr80481.C,  -std=gnu++14
  ...
  364936 FAIL: g++.dg/pr80481.C  -std=gnu++14  scan-assembler-not vmovaps


...to be continued...