953ff28998
2006-01-18 Richard Henderson <rth@redhat.com>
Jakub Jelinek <jakub@redhat.com>
Diego Novillo <dnovillo@redhat.com>
* libgomp: New directory.
* Makefile.def: Add target_module libgomp.
* Makefile.in: Regenerate.
* configure.in (target_libraries): Add target-libgomp.
* configure: Regenerate.
contrib/
2006-01-18 Richard Henderson <rth@redhat.com>
Diego Novillo <dnovillo@redhat.com>
* gcc_update (files_and_dependencies): Add libgomp files.
gcc/
2006-01-18 Richard Henderson <rth@redhat.com>
Aldy Hernandez <aldyh@redhat.com>
Jakub Jelinek <jakub@redhat.com>
Diego Novillo <dnovillo@redhat.com>
* omp-low.c: New file.
* c-omp.c: New file.
2006-01-18 Richard Henderson <rth@redhat.com>
Jakub Jelinek <jakub@redhat.com>
Diego Novillo <dnovillo@redhat.com>
* doc/invoke.texi: Document -fopenmp.
* tree-dump.h (debug_function): Declare.
* hooks.c (hook_bool_tree_bool_false): New function.
(hook_tree_tree_null): Remove.
(hook_tree_tree_tree_null): New.
* hooks.h: Update to match.
* tree-pretty-print.c (debug_tree_chain): New.
(print_generic_expr): Handle TDF_CHAIN.
(dump_generic_node): Handle BLOCK.
Do not abort with incomplete SWITCH_EXPRs.
Do not dump body of an OpenMP directive if TDF_SLIM is given.
<case OMP_PARALLEL, OMP_FOR, OMP_SECTIONS>: Don't
print space after directive name.
<OMP_FOR>: Handle printing OMP_FOR_PRE_BODY.
Handle OMP_MASTER and OMP_ORDERED.
Handle printing of OMP_BODY just in one place, goto
dump_omp_body in the rest of OMP_* nodes that have
OMP_BODY.
Don't handle clause nodes here. Update omp statements to
use dump_omp_clauses.
Handle OMP_SINGLE, OMP_SECTIONS, OMP_SECTION,
OMP_CLAUSE_ORDERED, OMP_CLAUSE_SCHEDULE, OMP_ATOMIC,
OMP_CRITICAL, OMP_CLAUSE_NOWAIT, GOMP_CLAUSE_IF,
GOMP_CLAUSE_NUM_THREADS, GOMP_FOR, GOMP_CLAUSE_SHARED,
GOMP_CLAUSE_FIRSTPRIVATE, GOMP_CLAUSE_LASTPRIVATE,
GOMP_CLAUSE_COPYIN and GOMP_CLAUSE_COPYPRIVATE.
Adjust output for GOMP_PARALLEL.
(dump_omp_clauses): New.
(print_declaration): Dump DECL_VALUE_EXPR.
(op_symbol_1): Split out of op_symbol.
(dumping_stmts): Remove. Update all users.
* cgraph.c (cgraph_analyze_queue): New.
(cgraph_add_new_function): New.
* cgraph.h (cgraph_analyze_queue): Declare.
(cgraph_add_new_function): Declare.
(cgraph_lower_function): Remove.
* tree.c (walk_tree): Walk OMP_CLAUSE_CHAIN of OMP_CLAUSE_*
nodes. Use switch for all nodes, handle most of IS_EXPR_CODE_CLASS
and TYPE_P nodes in its default clause.
(empty_body_p): New.
(tree_range_check_failed): New.
(build5_stat): New.
* tree.h (OMP_CLAUSE_REDUCTION_INIT,
OMP_CLAUSE_REDUCTION_MERGE,
OMP_CLAUSE_REDUCTION_PLACEHOLDER,
OMP_CLAUSE_PRIVATE_DEBUG,
OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE, OMP_FOR_PRE_BODY,
OMP_MASTER_BODY, OMP_ORDERED_BODY OMP_BODY,
OMP_CLAUSES, OMP_CLAUSE_DECL, OMP_CLAUSE_DEFAULT_KIND,
OMP_CLAUSE_CHAIN, OMP_CLAUSE_OUTER_DECL,
OMP_CLAUSE_INNER_DECL, OMP_CLAUSE_NUM_THREADS_EXPR,
OMP_CLAUSE_IF_EXPR, OMP_CLAUSE_SCHEDULE_CHUNK_EXPR,
OMP_CLAUSE_SCHEDULE_CHUNK_SIZE. OMP_PARALLEL_VAR_INIT,
OMP_PARALLEL_VAR_REDUC, OMP_FOR_VAR_INIT,
OMP_FOR_VAR_LAST, OMP_FOR_VAR_REDUC,
OMP_SECTIONS_VAR_INIT, OMP_SECTIONS_VAR_LAST,
OMP_SECTIONS_VAR_REDUC, OMP_CLAUSE_REDUCTION_CODE
OMP_SINGLE_CLAUSES, OMP_SINGLE_BODY,
OMP_CLAUSE_SCHEDULE_CHUNK_SIZE, OMP_SECTION_BODY,
OMP_CRITICAL_NAME, OMP_CRITICAL_BODY): New.
(TREE_RANGE_CHECK): New.
(empty_body_p): Declare.
(enum omp_clause_default_kind): New.
(build_string_literal): Declare.
(enum omp_clause_schedule_kind, OMP_CLAUSE_SCHEDULE_KIND): New.
(build5_stat, build5): Declare.
* tree-pass.h (TDF_CHAIN): Define.
* tree-pass.h (PROP_gimple_lomp): Define.
(pass_lower_omp): Declare.
* diagnostic.h (debug_tree_chain): Declare.
* builtins.c (get_builtin_sync_mode): Use 0 as last argument to
mode_for_size.
(expand_builtin): Handle sync BUILT_IN_*_16 builtins.
* builtins.c (build_string_literal): Make extern.
* gcc.c (include_spec_function): New.
(static_spec_functions): Add it.
(main): Move load of libgomp.spec ...
(LINK_COMMAND_SPEC): ... here.
(link_gomp_spec): New.
(static_specs): Include it.
(LINK_COMMAND_SPEC): Add link_gomp.
(GOMP_SELF_SPECS): New.
(driver_self_specs): Include it.
(switch_matches): Don't mark inline.
(main): Load libgomp.spec.
* tree-gimple.c (is_gimple_stmt): True for OMP_MASTER,
OMP_ORDERED, OMP_CRITICAL, OMP_SECTIONS, OMP_SECTION,
and OMP_SINGLE, OMP_FOR and OMP_PARALLEL.
* tree-gimple.h (enum omp_parallel): Declare.
(determine_parallel_type): Declare.
(omp_firstprivatize_variable): Declare.
(omp_reduction_init): Declare.
(diagnose_omp_structured_block_errors): Declare.
(struct walk_stmt_info): Add want_return_expr.
(struct walk_stmt_info): Add want_bind_expr, want_locations.
(find_omp_clause): Declare.
(insert_field_into_struct): Declare.
(struct walk_stmt_info): Move from tree-nested.c
(walk_stmts): Declare.
* c-cppbuiltin.c (c_cpp_builtins): If -fopenmp, #define _OPENMP
to 200505.
* cgraphunit.c (cgraph_lower_function): Make static.
(cgraph_finalize_pending_functions): New.
(cgraph_finalize_function): Call it.
(cgraph_finalize_compilation_unit): Likewise.
* builtin-types.def (BT_I16, BT_FN_I16_VPTR_I16,
BT_FN_BOOL_VPTR_I16_I16, BT_FN_I16_VPTR_I16_I16): Add.
(BT_FN_UINT_UINT): New.
(DEF_FUNCTION_TYPE_6, DEF_FUNCTION_TYPE_7,
DEF_FUNCTION_TYPE_VAR_4): Document.
(BT_PTR_LONG, BT_PTR_PTR, BT_FN_BOOL, BT_FN_INT,
BT_FN_VOID_PTRPTR, BT_PTR_FN_VOID_PTR,
BT_FN_BOOL_LONGPTR_LONGPTR, BT_FN_VOID_OMPFN_PTR_UINT,
BT_FN_VOID_OMPFN_PTR_UINT_UINT,
BT_FN_BOOL_LONG_LONG_LONG_LONGPTR_LONGPTR,
BT_FN_BOOL_LONG_LONG_LONG_LONG_LONGPTR_LONGPTR,
BT_FN_VOID_OMPFN_PTR_UINT_LONG_LONG_LONG,
BT_FN_VOID_OMPFN_PTR_UINT_LONG_LONG_LONG_LONG): New.
* builtins.def: Update DEF_BUILTIN comment to include COND argument.
Move all DEF_SYNC_BUILTIN () and DEF_GOMP_BUILTIN () builtins
into separate files.
(DEF_GOMP_BUILTIN): New.
(BUILT_IN_OMP_GET_THREAD_NUM, BUILT_IN_GOMP_BARRIER,
BUILT_IN_GOMP_CRITICAL_START, BUILT_IN_GOMP_CRITICAL_END,
BUILT_IN_GOMP_CRITICAL_NAME_START, BUILT_IN_GOMP_CRITICAL_NAME_END,
BUILT_IN_GOMP_LOOP_STATIC_START, BUILT_IN_GOMP_LOOP_DYNAMIC_START,
BUILT_IN_GOMP_LOOP_GUIDED_START, BUILT_IN_GOMP_LOOP_RUNTIME_START,
BUILT_IN_GOMP_LOOP_ORDERED_STATIC_START,
BUILT_IN_GOMP_LOOP_ORDERED_DYNAMIC_START,
BUILT_IN_GOMP_LOOP_ORDERED_GUIDED_START,
BUILT_IN_GOMP_LOOP_ORDERED_RUNTIME_START,
BUILT_IN_GOMP_LOOP_STATIC_NEXT, BUILT_IN_GOMP_LOOP_DYNAMIC_NEXT,
BUILT_IN_GOMP_LOOP_GUIDED_NEXT, BUILT_IN_GOMP_LOOP_RUNTIME_NEXT,
BUILT_IN_GOMP_LOOP_ORDERED_STATIC_NEXT,
BUILT_IN_GOMP_LOOP_ORDERED_DYNAMIC_NEXT,
BUILT_IN_GOMP_LOOP_ORDERED_GUIDED_NEXT,
BUILT_IN_GOMP_LOOP_ORDERED_RUNTIME_NEXT,
BUILT_IN_GOMP_PARALLEL_LOOP_STATIC_START,
BUILT_IN_GOMP_PARALLEL_LOOP_DYNAMIC_START,
BUILT_IN_GOMP_PARALLEL_LOOP_GUIDED_START,
BUILT_IN_GOMP_PARALLEL_LOOP_RUNTIME_START,
BUILT_IN_GOMP_LOOP_END, BUILT_IN_GOMP_LOOP_END_NOWAIT,
BUILT_IN_GOMP_ORDERED_START, BUILT_IN_GOMP_ORDERED_END,
BUILT_IN_GOMP_PARALLEL_START, BUILT_IN_GOMP_PARALLEL_END,
BUILT_IN_GOMP_SECTIONS_START, BUILT_IN_GOMP_SECTIONS_NEXT,
BUILT_IN_GOMP_PARALLEL_SECTIONS_START, BUILT_IN_GOMP_SECTIONS_END,
BUILT_IN_GOMP_SECTIONS_END_NOWAIT, BUILT_IN_GOMP_SINGLE_START,
BUILT_IN_GOMP_SINGLE_COPY_START, BUILT_IN_GOMP_SINGLE_COPY_END): New.
* sync-builtins.def: New file, moved from builtins.def.
* omp-builtins.def: New file, moved from builtins.def.
* c-objc-common.h (LANG_HOOKS_OMP_PREDETERMINED_SHARING): Redefine.
* gimple-low.c (lower_function_body): Clear data.
(lower_stmt): Do not handle COMPOUND_EXPR.
Remove call to print_node_brief.
* c-tree.h (c_finish_omp_clauses): New prototype.
(C_DECL_THREADPRIVATE_P): Define.
(lookup_name_no_remap, c_omp_remap_private): Remove
(c_begin_omp_parallel, c_finish_omp_parallel): Update.
(check_for_loop_decls): Update decl.
(lookup_name_no_remap, c_omp_remap_private): Declare.
(build_indirect_ref, build_modify_expr, pushdecl,
pushdecl_top_level): Move to c-common.h.
* dwarf2out.c (loc_descriptor_from_tree_1): Don't set unsignedp
before the switch, but just in the 2 places that need it.
* c-decl.c (diagnose_mismatched_decls): Do not check for
mismatched thread-local attributes when OLDDECL is marked
threadprivate and NEWDECL has no thread-local attributes.
(merge_decls): Merge C_DECL_THREADPRIVATE_P.
(c_gimple_diagnostics_recursively): Rename from
c_warn_unused_result_recursively. Invoke
diagnose_omp_structured_block_errors.
(check_for_loop_decls): Return a singular decl found.
* langhooks.c (lhd_omp_predetermined_sharing): Return
OMP_CLAUSE_DEFAULT_SHARED for DECL_ARTIFICIAL decls.
(lhd_omp_firstprivatize_type_sizes): New.
(lhd_omp_assignment): New.
(lhd_omp_predetermined_sharing): New.
* langhooks.h (struct gimplify_omp_ctx): Forward declare.
(struct lang_hooks_for_types): Add
omp_firstprivatize_type_sizes, omp_privatize_by_reference,
omp_predetermined_sharing, omp_disregard_value_expr,
omp_private_debug_clause, omp_clause_default_ctor,
omp_clause_copy_ctor, omp_clause_assign_op, omp_clause_dtor.
(c_finish_omp_clauses): New.
(c_finish_bc_stmt): Diagnose break within omp for.
(c_begin_omp_parallel, c_finish_omp_parallel): New.
(build_unary_op): Return error_mark after reporting
a readonly_error.
(build_modify_expr): Likewise.
* gimplify.c: Include optabs.h and pointer-set.h.
(enum gimplify_omp_var_data): Declare.
(struct gimplify_omp_ctx): Declare.
(struct gimplify_ctx): Add fields prev_context, combined_pre_p
and combined_ctxp.
(gimplify_ctxp, gimplify_omp_ctxp): New local variables.
(push_gimplify_context, pop_gimplify_context): Allow nesting.
(splay_tree_compare_decl_uid): New.
(new_omp_context): New.
(delete_omp_context): New.
(gimple_add_tmp_var): Call omp_add_variable.
(gimplify_bind_expr): Likewise.
(gimplify_var_or_parm_decl): If omp_notice_variable returned
true, disregard DECL_VALUE_EXPR on the decl if any.
(gimplify_expr_in_ctx): New.
(omp_firstprivatize_variable, omp_firstprivatize_type_sizes
omp_add_variable, omp_notice_variable, omp_is_private
gimplify_scan_omp_clauses, gimplify_adjust_omp_clauses_1
gimplify_adjust_omp_clauses, gimplify_omp_parallel
gimplify_omp_for, gimplify_omp_workshare, goa_lhs_expr_p
gimplify_omp_atomic_fetch_op, goa_stabilize_expr
gimplify_omp_atomic_pipeline, gimplify_omp_atomic_mutex
gimplify_omp_atomic): New.
(gimplify_expr): Handle OMP_PARALLEL, OMP_FOR, OMP_SECTIONS,
OMP_SINGLE, OMP_SECTION, OMP_MASTER, OMP_ORDERED,
OMP_CRITICAL and OMP_ATOMIC.
(gimplify_body): Verify gimplify_ctxp is empty after gimplification.
* c-pragma.h (enum pragma_kind): Add
PRAGMA_OMP_ATOMIC, PRAGMA_OMP_BARRIER,
PRAGMA_OMP_CRITICAL, PRAGMA_OMP_FLUSH, PRAGMA_OMP_FOR,
PRAGMA_OMP_MASTER, PRAGMA_OMP_ORDERED,
PRAGMA_OMP_PARALLEL, PRAGMA_OMP_PARALLEL_FOR,
PRAGMA_OMP_PARALLEL_SECTIONS, PRAGMA_OMP_SECTION,
PRAGMA_OMP_SECTIONS, PRAGMA_OMP_SINGLE,
PRAGMA_OMP_THREADPRIVATE.
* tree.def (OMP_PARALLEL, OMP_FOR, OMP_SECTIONS,
OMP_SINGLE, OMP_SECTION, OMP_MASTER, OMP_ORDERED,
OMP_CRITICAL, OMP_ATOMIC, OMP_CLAUSE_PRIVATE,
OMP_CLAUSE_SHARED, OMP_CLAUSE_FIRSTPRIVATE,
OMP_CLAUSE_LASTPRIVATE, OMP_CLAUSE_REDUCTION,
OMP_CLAUSE_COPYIN, OMP_CLAUSE_COPYPRIVATE,
OMP_CLAUSE_IF, OMP_CLAUSE_NUM_THREADS,
OMP_CLAUSE_SCHEDULE, OMP_CLAUSE_NOWAIT,
OMP_CLAUSE_ORDERED, OMP_CLAUSE_DEFAULT): Define.
* print-tree.c (print_node): Dump DECL_VALUE_EXPR.
* tree-ssa-dce.c (find_control_dependence): Do not assume that
ENTRY_BLOCK_PTR->next_bb == single_succ (ENTRY_BLOCK_PTR).
* tree-nested.c (convert_call_expr): Call walk_body on OMP_BODY for
OpenMP directives.
(struct nesting_info): Add field_map,
suppress_expansion, debug_var_chain.
(create_nesting_tree): Initialize them.
(lookup_field_for_decl): Use field_map.
(get_nonlocal_debug_decl, get_local_debug_decl): New.
(convert_local_omp_clauses): New.
(finalize_nesting_tree_1): Add debug_var_chain to toplevel block.
(walk_body): Split out of walk_function.
(convert_nonlocal_omp_clauses, convert_local_omp_clauses): New.
(convert_nonlocal_reference): Handle omp statements.
(convert_local_reference): Likewise.
(unnest_nesting_tree_1): Split out of finalize_nesting_tree_1.
(unnest_nesting_tree): New.
(lower_nested_functions): Call it.
(insert_field_into_struct): Make extern.
(struct walk_stmt_info): Move to tree-gimple.h.
(walk_stmts): Make extern.
* omp-builtins.def: New file.
* tree-iterator.c (expr_only): Clarify comment.
* c-common.h (pushdecl_top_level, pushdecl,
build_modify_expr, build_indirect_ref,
c_finish_omp_master, c_finish_omp_critical,
c_finish_omp_ordered, c_finish_omp_barrier,
c_finish_omp_atomic, c_finish_omp_flush,
c_finish_omp_for, c_split_parallel_clauses,
omp_clause_default_kind, c_omp_sharing_predetermined,
c_omp_remap_decl): Declare.
* Makefile.in (BUILTINS_DEF): Add omp-builtins.def.
(OBJS-common): Add omp-low.o.
(c-omp.o, omp-low.o): Add.
(gimplify.o): Add dependency on $(OPTABS_H).
(GTFILES): Add omp-low.c.
(gt-stringpool.h): Add.
* tree-cfg.c (set_bb_for_stmt): Do not update the
block-to-labels map if we are currently expanding to RTL.
(tree_node_can_be_shared): Remove unnecessary CONSTANT_CLASS_P
checks.
Handle IDENTIFIER_NODE.
(tree_verify_flow_info): Do not ICE when emitting error
messages about invalid labels.
(dump_function_to_file): Reset CFUN before emitting the body
of the function.
(debug_function): New.
* passes.c (init_optimization_passes): Schedule
pass_lower_omp.
* langhooks-def.h (lhd_omp_predetermined_sharing,
lhd_omp_assignment, lhd_omp_firstprivatize_type_sizes):
Declare.
(LANG_HOOKS_OMP_FIRSTPRIVATIZE_TYPE_SIZES): Define.
(LANG_HOOKS_FOR_TYPES_INITIALIZER): Use it.
(LANG_HOOKS_OMP_PRIVATIZE_BY_REFERENCE,
LANG_HOOKS_OMP_PREDETERMINED_SHARING,
LANG_HOOKS_OMP_DISREGARD_VALUE_EXPR,
LANG_HOOKS_OMP_PRIVATE_DEBUG_CLAUSE,
LANG_HOOKS_OMP_CLAUSE_DEFAULT_CTOR,
LANG_HOOKS_OMP_CLAUSE_COPY_CTOR,
LANG_HOOKS_OMP_CLAUSE_ASSIGN_OP,
LANG_HOOKS_OMP_CLAUSE_DTOR): Define.
(LANG_HOOK_DECLS): Use them.
2006-01-18 Dmitry Kurochkin <dmitry.kurochkin@gmail.com>
Richard Henderson <rth@redhat.com>
Jakub Jelinek <jakub@redhat.com>
Diego Novillo <dnovillo@redhat.com>
* c-parser.c (pragma_omp_clause): Define.
(c_parser_declaration_or_fndef): Document OpenMP syntax.
(c_parser_compound_statement): Likewise.
(c_parser_statement): Likewise.
(c_parser_pragma): Handle omp pragmas.
(OMP_FOR_CLAUSE_MASK, OMP_SECTIONS_CLAUSE_MASK,
OMP_PARALLEL_CLAUSE_MASK, OMP_SINGLE_CLAUSE_MASK): Define.
(c_parser_omp_clause_name, check_no_duplicate_clause,
c_parser_omp_variable_list,
c_parser_omp_var_list_parens, c_parser_omp_clause_copyin,
c_parser_omp_clause_copyprivate,
c_parser_omp_clause_default,
c_parser_omp_clause_firstprivate, c_parser_omp_clause_if,
c_parser_omp_clause_lastprivate,
c_parser_omp_clause_nowait,
c_parser_omp_clause_num_threads,
c_parser_omp_clause_ordered, c_parser_omp_clause_private,
c_parser_omp_clause_reduction,
c_parser_omp_clause_schedule, c_parser_omp_clause_shared,
c_parser_omp_all_clauses, c_parser_omp_structured_block,
c_parser_omp_atomic, c_parser_omp_barrier,
c_parser_omp_critical, c_parser_omp_flush,
c_parser_omp_for_loop, c_parser_omp_for,
c_parser_omp_master, c_parser_omp_ordered,
c_parser_omp_sections_scope, c_parser_omp_sections,
c_parser_omp_parallel, c_parser_omp_single,
c_parser_omp_construct, c_parser_omp_threadprivate): New.
* c-pragma.c (init_pragma): Do omp pragma registration here.
* c.opt (fopenmp): New flag.
2006-01-18 Eric Christopher <echristo@apple.com>
* gcc.c (GOMP_SELF_SPECS): Bracket in #ifndef/#endif.
* config/darwin.h (GOMP_SELF_SPECS): Define.
testsuite/
2006-01-18 Richard Henderson <rth@redhat.com>
Aldy Hernandez <aldyh@redhat.com>
Jakub Jelinek <jakub@redhat.com>
Diego Novillo <dnovillo@redhat.com>
Uros Bizjak <uros@kss-loka.si>
* testsuite/gcc.dg/gomp: New directory.
From-SVN: r109902
97 lines
2.2 KiB
C
97 lines
2.2 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <omp.h>
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#define MAX 1000
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void main1()
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{
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int i, N1, N2, step;
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int a[MAX], b[MAX];
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N1 = rand () % 13;
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N2 = rand () % (MAX - 51) + 50;
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step = rand () % 7 + 1;
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printf ("N1 = %d\nN2 = %d\nstep = %d\n", N1, N2, step);
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for (i = N1; i <= N2; i += step)
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a[i] = 42+ i;
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/* COUNTING UP (<). Fill in array 'b' in parallel. */
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memset (b, 0, sizeof b);
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#pragma omp parallel shared(a,b,N1,N2,step) private(i)
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{
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#pragma omp for
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for (i = N1; i < N2; i += step)
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b[i] = a[i];
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}
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/* COUNTING UP (<). Check that all the cells were filled in properly. */
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for (i = N1; i < N2; i += step)
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if (a[i] != b[i])
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abort ();
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printf ("for (i = %d; i < %d; i += %d) [OK]\n", N1, N2, step);
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/* COUNTING UP (<=). Fill in array 'b' in parallel. */
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memset (b, 0, sizeof b);
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#pragma omp parallel shared(a,b,N1,N2,step) private(i)
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{
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#pragma omp for
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for (i = N1; i <= N2; i += step)
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b[i] = a[i];
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}
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/* COUNTING UP (<=). Check that all the cells were filled in properly. */
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for (i = N1; i <= N2; i += step)
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if (a[i] != b[i])
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abort ();
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printf ("for (i = %d; i <= %d; i += %d) [OK]\n", N1, N2, step);
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/* COUNTING DOWN (>). Fill in array 'b' in parallel. */
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memset (b, 0, sizeof b);
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#pragma omp parallel shared(a,b,N1,N2,step) private(i)
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{
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#pragma omp for
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for (i = N2; i > N1; i -= step)
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b[i] = a[i];
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}
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/* COUNTING DOWN (>). Check that all the cells were filled in properly. */
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for (i = N2; i > N1; i -= step)
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if (a[i] != b[i])
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abort ();
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printf ("for (i = %d; i > %d; i -= %d) [OK]\n", N2, N1, step);
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/* COUNTING DOWN (>=). Fill in array 'b' in parallel. */
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memset (b, 0, sizeof b);
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#pragma omp parallel shared(a,b,N1,N2,step) private(i)
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{
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#pragma omp for
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for (i = N2; i >= N1; i -= step)
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b[i] = a[i];
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}
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/* COUNTING DOWN (>=). Check that all the cells were filled in properly. */
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for (i = N2; i >= N1; i -= step)
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if (a[i] != b[i])
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abort ();
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printf ("for (i = %d; i >= %d; i -= %d) [OK]\n", N2, N1, step);
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}
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int
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main ()
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{
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int i;
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srand (0);
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for (i = 0; i < 10; ++i)
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main1();
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return 0;
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}
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