[PATCH] D55861: [OpenMP] Fix data sharing analysis in nested clause

[Joel E. Denny via Phabricator via cfe-commits]

jdenny created this revision.
jdenny added a reviewer: ABataev.
Herald added a subscriber: guansong.

Without this patch, clang doesn't complain that X needs explicit data
sharing attributes in the following:

  #pragma omp target teams default(none)
  {
    #pragma omp parallel num_threads(X)
      ;
  }

However, clang does produce that complaint after the braces are 
removed.  With this patch, clang complains in both cases.


Repository:
  rC Clang

https://reviews.llvm.org/D55861

Files:
  clang/lib/Sema/SemaOpenMP.cpp
  clang/test/OpenMP/target_teams_messages.cpp


Index: clang/test/OpenMP/target_teams_messages.cpp
===================================================================
--- clang/test/OpenMP/target_teams_messages.cpp
+++ clang/test/OpenMP/target_teams_messages.cpp
@@ -50,6 +50,16 @@
 #pragma omp target teams default(none)
   ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
 
+#pragma omp target teams default(none)
+#pragma omp parallel num_threads(argc) // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
+  ;
+
+#pragma omp target teams default(none)
+  {
+#pragma omp parallel num_threads(argc) // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
+    ;
+  }
+
   goto L2; // expected-error {{use of undeclared label 'L2'}}
 #pragma omp target teams
   L2:
Index: clang/lib/Sema/SemaOpenMP.cpp
===================================================================
--- clang/lib/Sema/SemaOpenMP.cpp
+++ clang/lib/Sema/SemaOpenMP.cpp
@@ -2390,13 +2390,9 @@
   void VisitStmt(Stmt *S) {
     for (Stmt *C : S->children()) {
       if (C) {
-        if (auto *OED = dyn_cast<OMPExecutableDirective>(C)) {
-          // Check implicitly captured variables in the task-based directives to
-          // check if they must be firstprivatized.
-          VisitSubCaptures(OED);
-        } else {
-          Visit(C);
-        }
+        // Check implicitly captured variables in the task-based directives to
+        // check if they must be firstprivatized.
+        Visit(C);
       }
     }
   }


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