[PATCH], PR 79212: Fix ICE when compiling fortran test with openmp

[David Sherwood]

Hi,

I have a patch to fix the following openmp issue:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79212

Writing openmp directives in a certain way in fortran programs can lead to
the following assert:

internal compiler error: in maybe_lookup_decl_in_outer_ctx, at omp-low.c:4134
0xa941e6 maybe_lookup_decl_in_outer_ctx
        /work/davshe01/oban-work-shoji/src/gcc/gcc/omp-low.c:4134
0xa9cadc scan_sharing_clauses
        /work/davshe01/oban-work-shoji/src/gcc/gcc/omp-low.c:1975

Tested:
aarch64 - No regressions in gcc/testsuite/fortran.dg, gcc/testsuite/gcc.dg,
gcc/testsuite/g++.dg or libgomp/testsuite

Will do a full test run before submitting.

Good to go?
David Sherwood.

ChangeLog:

2017-01-24  David Sherwood  <david.sherwood@arm.com>

    PR middle-end/79212
    gcc/
        * gimplify.c (omp_notice_variable): Add GOVD_SEEN flag to variables in all contexts.

    gcc/testsuite/
        * gfortran.dg/gomp/sharing-4.f90: New test.

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