[OPENMP][NVPTX] target [teams distribute] simd maybe run without

runtime.

target [teams distribute] simd costructs do not require full runtime for
the correct execution, we can run them without full runtime.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@358766 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp

@@ -907,6 +907,8 @@ static bool hasNestedLightweightDirective(ASTContext &Ctx,
           isOpenMPWorksharingDirective(DKind) && isOpenMPLoopDirective(DKind) &&
           hasStaticScheduling(*NestedDir))
         return true;
+      if (DKind == OMPD_teams_distribute_simd || DKind == OMPD_simd)
+        return true;
       if (DKind == OMPD_parallel) {
         Body = NestedDir->getInnermostCapturedStmt()->IgnoreContainers(
             /*IgnoreCaptured=*/true);
@@ -955,6 +957,8 @@ static bool hasNestedLightweightDirective(ASTContext &Ctx,
           isOpenMPWorksharingDirective(DKind) && isOpenMPLoopDirective(DKind) &&
           hasStaticScheduling(*NestedDir))
         return true;
+      if (DKind == OMPD_distribute_simd || DKind == OMPD_simd)
+        return true;
       if (DKind == OMPD_parallel) {
         Body = NestedDir->getInnermostCapturedStmt()->IgnoreContainers(
             /*IgnoreCaptured=*/true);
@@ -971,6 +975,8 @@ static bool hasNestedLightweightDirective(ASTContext &Ctx,
       }
       return false;
     case OMPD_target_parallel:
+      if (DKind == OMPD_simd)
+        return true;
       return isOpenMPWorksharingDirective(DKind) &&
              isOpenMPLoopDirective(DKind) && hasStaticScheduling(*NestedDir);
     case OMPD_target_teams_distribute:
@@ -1052,8 +1058,9 @@ static bool supportsLightweightRuntime(ASTContext &Ctx,
     // (Last|First)-privates must be shared in parallel region.
     return hasStaticScheduling(D);
   case OMPD_target_simd:
-  case OMPD_target_teams_distribute:
   case OMPD_target_teams_distribute_simd:
+    return true;
+  case OMPD_target_teams_distribute:
     return false;
   case OMPD_parallel:
   case OMPD_for:

test/OpenMP/nvptx_target_simd_codegen.cpp

@@ -54,33 +54,33 @@ int bar(int n){
 }
 
 // CHECK-LABEL: define {{.*}}void {{@__omp_offloading_.+l25}}(
-// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 1, i16 0)
+// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 0, i16 0)
 // CHECK-NOT: call void @__kmpc_for_static_init
 // CHECK-NOT: call void @__kmpc_for_static_fini
-// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 1)
+// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 0)
 // CHECK: ret void
 
 // CHECK-LABEL: define {{.*}}void {{@__omp_offloading_.+l30}}(
-// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 1, i16 0)
+// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 0, i16 0)
 // CHECK-NOT: call void @__kmpc_for_static_init
 // CHECK-NOT: call void @__kmpc_for_static_fini
-// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 1)
+// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 0)
 // CHECK: ret void
 
 // CHECK-LABEL: define {{.*}}void {{@__omp_offloading_.+l35}}(
-// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 1, i16 0)
+// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 0, i16 0)
 // CHECK-NOT: call void @__kmpc_for_static_init
 // CHECK-NOT: call void @__kmpc_for_static_fini
-// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 1)
+// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 0)
 // CHECK: ret void
 
 // CHECK-LABEL: define {{.*}}void {{@__omp_offloading_.+l40}}(
-// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 1, i16 0)
+// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 0, i16 0)
 // CHECK-NOT: call void @__kmpc_for_static_init
 // CHECK-NOT: call void @__kmpc_for_static_fini
 // CHECK-NOT: call i32 @__kmpc_nvptx_simd_reduce_nowait(
 // CHECK-NOT: call void @__kmpc_nvptx_end_reduce_nowait(
-// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 1)
+// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 0)
 // CHECK: ret void
 
 

test/OpenMP/nvptx_target_teams_distribute_simd_codegen.cpp

@@ -63,33 +63,33 @@ int bar(int n){
 }
 
 // CHECK-LABEL: define {{.*}}void {{@__omp_offloading_.+}}_l30(
-// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 1, i16 0)
+// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 0, i16 0)
 // CHECK: call void @__kmpc_for_static_init_4({{.+}}, {{.+}}, {{.+}} 91,
 // CHECK: call void @__kmpc_for_static_fini(
-// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 1)
+// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 0)
 // CHECK: ret void
 
 // CHECK-LABEL: define {{.*}}void {{@__omp_offloading_.+}}_l36(
-// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 1, i16 0)
+// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 0, i16 0)
 // CHECK: call void @__kmpc_for_static_init_4({{.+}}, {{.+}}, {{.+}} 91,
 // CHECK: call void @__kmpc_for_static_fini(
-// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 1)
+// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 0)
 // CHECK: ret void
 
 // CHECK-LABEL: define {{.*}}void {{@__omp_offloading_.+}}_l41(
-// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 1, i16 0)
+// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 0, i16 0)
 // CHECK: call void @__kmpc_for_static_init_4({{.+}}, {{.+}}, {{.+}} 91,
 // CHECK: call void @__kmpc_for_static_fini(
-// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 1)
+// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 0)
 // CHECK: ret void
 
 // CHECK: define {{.*}}void {{@__omp_offloading_.+}}_l46({{.+}}, i{{32|64}} [[F_IN:%.+]])
 // CHECK: store {{.+}} [[F_IN]], {{.+}}* {{.+}},
-// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 1, i16 0)
+// CHECK: call void @__kmpc_spmd_kernel_init(i32 %{{.+}}, i16 0, i16 0)
 // CHECK: store {{.+}} 99, {{.+}}* [[COMB_UB:%.+]], align
 // CHECK: call void @__kmpc_for_static_init_4({{.+}}, {{.+}}, {{.+}} 91, {{.+}}, {{.+}}, {{.+}}* [[COMB_UB]],
 // CHECK: call void @__kmpc_for_static_fini(
-// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 1)
+// CHECK: call void @__kmpc_spmd_kernel_deinit_v2(i16 0)
 // CHECK: ret void
 
 #endif