100 lines · cpp
1// RUN: %libomp-cxx-compile-and-run2 3#include <stdio.h>4#include <omp.h>5 6#define NT 47#define INIT 108 9/*10The test emulates code generation needed for reduction with task modifier on11parallel construct.12 13Note: tasks could just use in_reduction clause, but compiler does not accept14this because of bug: it mistakenly requires reduction item to be shared, which15is only true for reduction on worksharing and wrong for task reductions.16*/17 18//------------------------------------------------19// OpenMP runtime library routines20#ifdef __cplusplus21extern "C" {22#endif23extern void *__kmpc_task_reduction_get_th_data(int gtid, void *tg, void *item);24// extern void* __kmpc_task_reduction_modifier_init(void *loc, int gtid, int25// is_ws, int num, void* data);26extern void *__kmpc_taskred_modifier_init(void *loc, int gtid, int is_ws,27 int num, void *data);28extern void __kmpc_task_reduction_modifier_fini(void *loc, int gtid, int is_ws);29extern int __kmpc_global_thread_num(void *);30#ifdef __cplusplus31}32#endif33 34//------------------------------------------------35// Compiler-generated code36 37typedef struct red_input {38 void *reduce_shar; /**< shared between tasks item to reduce into */39 void *reduce_orig; /**< original reduction item used for initialization */40 size_t reduce_size; /**< size of data item in bytes */41 // three compiler-generated routines (init, fini are optional):42 void *reduce_init; /**< data initialization routine (single parameter) */43 void *reduce_fini; /**< data finalization routine */44 void *reduce_comb; /**< data combiner routine */45 unsigned flags; /**< flags for additional info from compiler */46} red_input_t;47 48void i_comb(void *lhs, void *rhs) { *(int *)lhs += *(int *)rhs; }49 50int main() {51 int var = INIT;52 int *p_var_orig = &var;53 omp_set_dynamic(0);54 omp_set_num_threads(NT);55// #pragma omp parallel reduction(task,+:var)56#pragma omp parallel reduction(+ : var) shared(p_var_orig)57 {58 int gtid = __kmpc_global_thread_num(NULL);59 void *tg; // pointer to taskgroup (optional)60 red_input_t r_var;61 r_var.reduce_shar = &var;62 r_var.reduce_orig =63 p_var_orig; // not used in this test but illustrates codegen64 r_var.reduce_size = sizeof(var);65 r_var.reduce_init = NULL;66 r_var.reduce_fini = NULL;67 r_var.reduce_comb = (void *)&i_comb;68 tg = __kmpc_taskred_modifier_init(69 NULL, // ident_t loc;70 gtid,71 0, // 1 - worksharing construct, 0 - parallel72 1, // number of reduction objects73 &r_var // related data74 );75 var++;76#pragma omp task /*in_reduction(+:var)*/ shared(var)77 {78 int gtid = __kmpc_global_thread_num(NULL);79 int *p_var = (int *)__kmpc_task_reduction_get_th_data(gtid, tg, &var);80 *p_var += 1;81 }82 if (omp_get_thread_num() > 0) {83#pragma omp task /*in_reduction(+:var)*/ shared(var)84 {85 int gtid = __kmpc_global_thread_num(NULL);86 int *p_var = (int *)__kmpc_task_reduction_get_th_data(gtid, tg, &var);87 *p_var += 1;88 }89 }90 __kmpc_task_reduction_modifier_fini(NULL, gtid, 0);91 }92 if (var == INIT + NT * 3 - 1) {93 printf("passed\n");94 return 0;95 } else {96 printf("failed: var = %d (!= %d)\n", var, INIT + NT * 3 - 1);97 return 1;98 }99}100