[Bug c/51360] [4.6 Regression] spurious unused-but-set-variable warning for var used in OpenMP pragma

["jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51360

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-02-09 17:15:39 UTC ---
Author: jakub
Date: Thu Feb  9 17:15:29 2012
New Revision: 184049

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184049
Log:
    Backported from mainline
    2011-12-15  Jakub Jelinek  <jakub@redhat.com>

    PR c/51360
    * c-parser.c (c_parser_omp_clause_num_threads,
    c_parser_omp_clause_schedule): Call mark_exp_read.

    * semantics.c (finish_omp_clauses): For OMP_CLAUSE_NUM_THREADS_EXPR
    and OMP_CLAUSE_SCHEDULE_CHUNK_EXPR call mark_rvalue_use.

    * gcc.dg/gomp/pr51360.c: New test.
    * g++.dg/gomp/pr51360.C: New test.
    * g++.dg/gomp/pr51360-2.C: New test.

Added:
    branches/gcc-4_6-branch/gcc/testsuite/g++.dg/gomp/pr51360-2.C
    branches/gcc-4_6-branch/gcc/testsuite/g++.dg/gomp/pr51360.C
    branches/gcc-4_6-branch/gcc/testsuite/gcc.dg/gomp/pr51360.c
Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/c-parser.c
    branches/gcc-4_6-branch/gcc/cp/ChangeLog
    branches/gcc-4_6-branch/gcc/cp/semantics.c
    branches/gcc-4_6-branch/gcc/testsuite/ChangeLog