Added support for Cilk Plus SIMD-enabled functions for C++.

Added support for Cilk Plus SIMD-enabled functions for C++.
gcc/c/c-parser.c
2014-01-23  Balaji V. Iyer  <balaji.v.iyer@intel.com>

        * c-parser.c (c_finish_omp_declare_simd): Made "cilk simd function"
        attribute an attribute without value.

gcc/cp/ChangeLog
2014-01-23  Balaji V. Iyer  <balaji.v.iyer@intel.com>

        * parser.c (cp_parser_direct_declarator): When Cilk Plus is enabled
        see if there is an attribute after function decl.  If so, then
        parse them now.
        (cp_parser_late_return_type_opt): Handle parsing of Cilk Plus SIMD
        enabled function late parsing.
        (cp_parser_gnu_attribute_list): Parse all the tokens for the vector
        attribute for a SIMD-enabled function.
        (cp_parser_omp_all_clauses): Skip parsing to the end of pragma when
        the function is used by SIMD-enabled function (indicated by NULL
        pragma token).   Added 3 new clauses: PRAGMA_CILK_CLAUSE_MASK,
        PRAGMA_CILK_CLAUSE_NOMASK and PRAGMA_CILK_CLAUSE_VECTORLENGTH
        (cp_parser_cilk_simd_vectorlength): Modified this function to handle
        vectorlength clause in SIMD-enabled function and #pragma SIMD's
        vectorlength clause.  Added a new bool parameter to differentiate
        between the two.
        (cp_parser_cilk_simd_fn_vector_attrs): New function.
        (is_cilkplus_vector_p): Likewise.
        (cp_parser_late_parsing_elem_fn_info): Likewise.
        (cp_parser_omp_clause_name): Added a check for "mask", "nomask"
        and "vectorlength" clauses when Cilk Plus is enabled.
        (cp_parser_omp_clause_linear): Added a new parameter of type bool
        and emit a sorry message when step size is a parameter.
        * parser.h (cp_parser::cilk_simd_fn_info): New field.
        * decl.c (grokfndecl): Added flag_enable_cilkplus along with
        flag_openmp.
        * pt.c (apply_late_template_attributes): Likewise.

testsuite/ChangeLog
2014-01-23  Balaji V. Iyer  <balaji.v.iyer@intel.com>

        * g++.dg/cilk-plus/cilk-plus.exp: Called the C/C++ common tests for
        SIMD enabled function.
        * g++.dg/cilk-plus/ef_test.C: New test.
        * c-c++-common/cilk-plus/ef_error3.c: Made certain messages C specific
        and added C++ ones.
        * c-c++-common/cilk-plus/vlength_errors.c: Added new dg-error tags
        to differenciate C error messages from C++ ones.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@206975 138bc75d-0d04-0410-961f-82ee72b054a4