[OpenMP] Issue warning if a simd construct nested inside another simd

construct

llvm-svn: 274352

1 files changed, 26 insertions, 6 deletions

diff --git a/clang/test/OpenMP/nesting_of_regions.cpp b/clang/test/OpenMP/nesting_of_regions.cpp
index 38012e85961..3694aa9fb4b 100644
--- a/clang/test/OpenMP/nesting_of_regions.cpp
+++ b/clang/test/OpenMP/nesting_of_regions.cpp
@@ -153,7 +153,7 @@ void foo() {
   }
 #pragma omp simd
   for (int i = 0; i < 10; ++i) {
-#pragma omp simd
+#pragma omp simd // expected-warning {{OpenMP only allows an ordered construct with the simd clause nested in a simd construct}}
     for (int i = 0; i < 10; ++i)
       ;
   }
@@ -257,6 +257,16 @@ void foo() {
   }
 #pragma omp simd
   for (int i = 0; i < 10; ++i) {
+#pragma omp ordered simd // OK
+    bar();
+  }
+#pragma omp simd
+  for (int i = 0; i < 10; ++i) {
+#pragma omp ordered threads // expected-error {{OpenMP constructs may not be nested inside a simd region}}
+    bar();
+  }
+#pragma omp simd
+  for (int i = 0; i < 10; ++i) {
 #pragma omp atomic // expected-error {{OpenMP constructs may not be nested inside a simd region}}
     ++a;
   }
@@ -516,7 +526,7 @@ void foo() {
   }
 #pragma omp for simd
   for (int i = 0; i < 10; ++i) {
-#pragma omp simd
+#pragma omp simd // expected-warning {{OpenMP only allows an ordered construct with the simd clause nested in a simd construct}}
     for (int i = 0; i < 10; ++i)
       ;
   }
@@ -620,6 +630,16 @@ void foo() {
   }
 #pragma omp for simd
   for (int i = 0; i < 10; ++i) {
+#pragma omp ordered simd // OK
+    bar();
+  }
+#pragma omp for simd
+  for (int i = 0; i < 10; ++i) {
+#pragma omp ordered threads // expected-error {{OpenMP constructs may not be nested inside a simd region}}
+    bar();
+  }
+#pragma omp for simd
+  for (int i = 0; i < 10; ++i) {
 #pragma omp atomic // expected-error {{OpenMP constructs may not be nested inside a simd region}}
     ++a;
   }
@@ -1902,7 +1922,7 @@ void foo() {
   }
 #pragma omp parallel for simd
   for (int i = 0; i < 10; ++i) {
-#pragma omp simd
+#pragma omp simd // expected-warning {{OpenMP only allows an ordered construct with the simd clause nested in a simd construct}}
     for (int i = 0; i < 10; ++i)
       ;
   }
@@ -4314,7 +4334,7 @@ void foo() {
   }
 #pragma omp simd
   for (int i = 0; i < 10; ++i) {
-#pragma omp simd
+#pragma omp simd // expected-warning {{OpenMP only allows an ordered construct with the simd clause nested in a simd construct}}
     for (int i = 0; i < 10; ++i)
       ;
   }
@@ -4662,7 +4682,7 @@ void foo() {
   }
 #pragma omp for simd
   for (int i = 0; i < 10; ++i) {
-#pragma omp simd
+#pragma omp simd // expected-warning {{OpenMP only allows an ordered construct with the simd clause nested in a simd construct}}
     for (int i = 0; i < 10; ++i)
       ;
   }
@@ -6022,7 +6042,7 @@ void foo() {
   }
 #pragma omp parallel for simd
   for (int i = 0; i < 10; ++i) {
-#pragma omp simd
+#pragma omp simd // expected-warning {{OpenMP only allows an ordered construct with the simd clause nested in a simd construct}}
     for (int i = 0; i < 10; ++i)
       ;
   }