libomptarget/test/offloading/small_trip_count.c

// clang-format off
// RUN: %libomptarget-compile-generic
// RUN: env LIBOMPTARGET_INFO=16 \
// RUN:   %libomptarget-run-generic 2>&1 | %fcheck-generic --check-prefix=DEFAULT
// RUN: env LIBOMPTARGET_INFO=16 LIBOMPTARGET_MIN_THREADS_FOR_LOW_TRIP_COUNT=8 \
// RUN:   %libomptarget-run-generic 2>&1 | %fcheck-generic --check-prefix=EIGHT

// UNSUPPORTED: x86_64-pc-linux-gnu
// UNSUPPORTED: x86_64-pc-linux-gnu-LTO

#define N 128

__attribute__((optnone)) void optnone() {}

int main() {
  // DEFAULT: Launching kernel {{.+_main_.+}} with 4 blocks and 32 threads in SPMD mode
  // EIGHT: Launching kernel {{.+_main_.+}} with 16 blocks and 8 threads in SPMD mode
#pragma omp target teams distribute parallel for simd
  for (int i = 0; i < N; ++i) {
    optnone();
  }
  // DEFAULT: Launching kernel {{.+_main_.+}} with 4 blocks and 32 threads in SPMD mode
  // EIGHT: Launching kernel {{.+_main_.+}} with 16 blocks and 8 threads in SPMD mode
#pragma omp target teams distribute parallel for simd
  for (int i = 0; i < N - 1; ++i) {
    optnone();
  }
  // DEFAULT: Launching kernel {{.+_main_.+}} with 5 blocks and 32 threads in SPMD mode
  // EIGHT: Launching kernel {{.+_main_.+}} with 17 blocks and 8 threads in SPMD mode
#pragma omp target teams distribute parallel for simd
  for (int i = 0; i < N + 1; ++i) {
    optnone();
  }
  // DEFAULT: Launching kernel {{.+_main_.+}} with 32 blocks and 4 threads in SPMD mode
  // EIGHT: Launching kernel {{.+_main_.+}} with 32 blocks and 4 threads in SPMD mode
#pragma omp target teams distribute parallel for simd thread_limit(4)
  for (int i = 0; i < N; ++i) {
    optnone();
  }
}