clang/test/OpenMP/remarks_parallel_in_multiple_target_state_machines.c

   1 // RUN: %clang_cc1                                 -verify=host      -Rpass=openmp-opt -Rpass-analysis=openmp-opt -fopenmp -x c++ -triple powerpc64le-unknown-unknown -fopenmp-targets=nvptx64-nvidia-cuda -emit-llvm-bc %s -o %t-ppc-host.bc
   2 // RUN: %clang_cc1                                 -verify=all,safe  -Rpass=openmp-opt -Rpass-analysis=openmp-opt -fopenmp -O2 -x c++ -triple nvptx64-unknown-unknown -fopenmp-targets=nvptx64-nvidia-cuda -emit-llvm %s -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-ppc-host.bc -o %t.out
   3 // RUN: %clang_cc1 -verify=all,safe  -Rpass=openmp-opt -Rpass-analysis=openmp-opt -fopenmp -O2 -x c++ -triple nvptx64-unknown-unknown -fopenmp-targets=nvptx64-nvidia-cuda -emit-llvm %s -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-ppc-host.bc -o %t.out
   4
   5 // host-no-diagnostics
   6
   7 [[omp::assume("omp_no_openmp")]] void baz(void);
   8
   9 void bar1(void) {
  10 #pragma omp parallel // #0
  11                      // safe-remark@#0 {{Parallel region is used in unknown ways. Will not attempt to rewrite the state machine. [OMP101]}}
  12   {
  13   }
  14 }
  15 void bar2(void) {
  16 #pragma omp parallel // #1
  17                      // safe-remark@#1 {{Parallel region is used in unknown ways. Will not attempt to rewrite the state machine. [OMP101]}}
  18   {
  19   }
  20 }
  21
  22 void foo1(void) {
  23 #pragma omp target teams // #2
  24                          // all-remark@#2 {{Rewriting generic-mode kernel with a customized state machine. [OMP131]}}
  25
  26   {
  27     baz();           // all-remark {{Value has potential side effects preventing SPMD-mode execution. Add `[[omp::assume("ompx_spmd_amenable")]]` to the called function to override. [OMP121]}}
  28 #pragma omp parallel // #3
  29     {
  30     }
  31     bar1();
  32 #pragma omp parallel // #4
  33     {
  34     }
  35   }
  36 }
  37
  38 void foo2(void) {
  39 #pragma omp target teams // #5
  40                          // all-remark@#5 {{Rewriting generic-mode kernel with a customized state machine. [OMP131]}}
  41   {
  42     baz();           // all-remark {{Value has potential side effects preventing SPMD-mode execution. Add `[[omp::assume("ompx_spmd_amenable")]]` to the called function to override. [OMP121]}}
  43 #pragma omp parallel // #6
  44     {
  45     }
  46     bar1();
  47     bar2();
  48 #pragma omp parallel // #7
  49     {
  50     }
  51     bar1();
  52     bar2();
  53   }
  54 }
  55
  56 void foo3(void) {
  57 #pragma omp target teams // #8
  58                          // all-remark@#8 {{Rewriting generic-mode kernel with a customized state machine. [OMP131]}}
  59   {
  60     baz();           // all-remark {{Value has potential side effects preventing SPMD-mode execution. Add `[[omp::assume("ompx_spmd_amenable")]]` to the called function to override. [OMP121]}}
  61 #pragma omp parallel // #9
  62     {
  63     }
  64     bar1();
  65     bar2();
  66 #pragma omp parallel // #10
  67     {
  68     }
  69     bar1();
  70     bar2();
  71   }
  72 }
  73
  74 void spmd(void) {
  75   // Verify we do not emit the remarks above for "SPMD" regions.
  76 #pragma omp target teams
  77 #pragma omp parallel
  78   {
  79   }
  80
  81 #pragma omp target teams distribute parallel for
  82   for (int i = 0; i < 100; ++i) {
  83   }
  84 }
  85
  86 #pragma omp begin declare target device_type(nohost)
  87 struct KernelEnvironmentTy;
  88 struct KernelLaunchEnvironmentTy;
  89 __attribute__((weak))
  90 extern "C" int __kmpc_target_init(struct KernelEnvironmentTy *, struct KernelLaunchEnvironmentTy *) { // all-remark {{Could not internalize function. Some optimizations may not be possible. [OMP140]}}
  91   return 0;
  92 }
  93 #pragma omp end declare target
  94
  95 // all-remark@* 9 {{OpenMP runtime call __kmpc_global_thread_num deduplicated. [OMP170]}}