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b5476e4c88
This patch adds support for parsing general lvalues ("locator list item
types") for OpenMP "map", "to" and "from" clauses to the C front-end,
similar to the previously-posted patch for C++. Such syntax is permitted
for OpenMP 5.0 and above. It was previously posted for mainline here:
https://gcc.gnu.org/pipermail/gcc-patches/2022-December/609038.html
and for the og13 branch here:
https://gcc.gnu.org/pipermail/gcc-patches/2023-June/623355.html
2024-01-11 Julian Brown <julian@codesourcery.com>
gcc/c-family/
* c-pretty-print.cc (c_pretty_printer::postfix_expression,
c_pretty_printer::expression): Add OMP_ARRAY_SECTION support.
gcc/c/
* c-parser.cc (c_parser_braced_init, c_parser_conditional_expression):
Don't allow OpenMP array section.
(c_parser_postfix_expression): Don't allow array section in statement
expression.
(c_parser_postfix_expression_after_primary): Add support for OpenMP
array section parsing.
(c_parser_expr_list): Don't allow OpenMP array section here.
(c_parser_omp_variable_list): Change ALLOW_DEREF parameter to
MAP_LVALUE. Support parsing of general lvalues in "map", "to" and
"from" clauses.
(c_parser_omp_var_list_parens): Change ALLOW_DEREF parameter to
MAP_LVALUE. Update call to c_parser_omp_variable_list.
(c_parser_oacc_data_clause): Update calls to
c_parser_omp_var_list_parens.
(c_parser_omp_clause_reduction): Use OMP_ARRAY_SECTION tree node
instead of TREE_LIST for array sections.
(c_parser_omp_target): Allow GOMP_MAP_ATTACH.
* c-tree.h (c_omp_array_section_p): Add extern declaration.
(build_omp_array_section): Add prototype.
* c-typeck.cc (c_omp_array_section_p): Add flag.
(mark_exp_read): Support OMP_ARRAY_SECTION.
(build_omp_array_section): Add function.
(build_external_ref): Tweak error path for OpenMP array sections.
(handle_omp_array_sections_1): Use OMP_ARRAY_SECTION tree code instead
of TREE_LIST. Handle more kinds of expressions.
(c_oacc_check_attachments): Use OMP_ARRAY_SECTION instead of TREE_LIST
for array sections.
(c_finish_omp_clauses): Use OMP_ARRAY_SECTION instead of TREE_LIST.
Check for supported expression types.
gcc/testsuite/
* gcc.dg/gomp/bad-array-section-c-1.c: New test.
* gcc.dg/gomp/bad-array-section-c-2.c: New test.
* gcc.dg/gomp/bad-array-section-c-3.c: New test.
* gcc.dg/gomp/bad-array-section-c-4.c: New test.
* gcc.dg/gomp/bad-array-section-c-5.c: New test.
* gcc.dg/gomp/bad-array-section-c-6.c: New test.
* gcc.dg/gomp/bad-array-section-c-7.c: New test.
* gcc.dg/gomp/bad-array-section-c-8.c: New test.
libgomp/
* libgomp.texi: C/C++ lvalues are supported now for map/to/from.
* testsuite/libgomp.c-c++-common/ind-base-4.c: New test.
* testsuite/libgomp.c-c++-common/unary-ptr-1.c: New test.
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