RE: GDB/Fortran: Support for Assumed Rank Zero.

["Potharla, Rupesh via Gdb-patches" <gdb-patches@sourceware.org>]

[AMD Official Use Only]


>On Mon, 18 Apr 2022 08:33:28 -0700
>Kevin Buettner via Gdb-patches <gdb-patches@sourceware.org> wrote:
>
>> I'm also (still) wondering how to run the testsuite to use flang
>> instead of gfortran since it'd be nice to test to see if the
>> setup_xfail actually works.  I spent just enough time looking at it
>> last week to convince myself that GDB's testing infrastructure
>> currently lacks the mechanisms to do this.  However, I could be wrong,
>> so if someone knows how it's done, I'd like to learn about it...
>
>It seems that the answer is to run the test as follows:
>
>make check TESTS="gdb.fortran/assumedrank.exp"
>RUNTESTFLAGS="F90_FOR_TARGET=flang"
>
>(I thought that I had tried this last week.)
>
>When I run the above command on my Fedora 35 machine, I see:
>
># of expected passes            500
># of unexpected failures        2503
># of unresolved testcases       500
>
But the command should only run assumedrank.exp testcase, looks like it ran all the tests under gdb.fortran.

gdb summary after running assumedrank.exp with flang:

                === gdb Summary ===

# of expected passes            25
# of expected failures          1

>So it seems that this test doesn't work very well with flang at the moment.
>
>That being the case, while I'm not against adding setup_xfail for clang, it
>doesn't seem all that useful due to the dismal results when testing against
>flang.
>
 

        if {$test_count == 1 && [test_compiler_info {clang-*}]} {
           setup_xfail "*-*-*"
           fail "compiler does not support rank 0"
           continue
        }

I think failing the testcase at the iteration entry and continuing to test next case is the best way to handle these dismal results.  
Please let me know your suggestions/comments on this.    

Regards,
Rupesh P