[ASTMatchers][OpenMP] Add base ompExecutableDirective() matcher.

Summary:
A simple matcher for `OMPExecutableDirective` Stmt type.
Split off from D57113.

Reviewers: gribozavr, aaron.ballman, JonasToth, george.karpenkov

Reviewed By: gribozavr, aaron.ballman

Subscribers: guansong, jdoerfert, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D59453

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@356674 91177308-0d34-0410-b5e6-96231b3b80d8

7 files changed, 78 insertions, 4 deletions

diff --git a/docs/LibASTMatchersReference.html b/docs/LibASTMatchersReference.html
index d2984844a4..298faa782b 100644
--- a/docs/LibASTMatchersReference.html
+++ b/docs/LibASTMatchersReference.html
@@ -1375,6 +1375,20 @@ Example matches @try
 </pre></td></tr>
 
 
+<tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html">Stmt</a>&gt;</td><td class="name" onclick="toggle('ompExecutableDirective0')"><a name="ompExecutableDirective0Anchor">ompExecutableDirective</a></td><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1OMPExecutableDirective.html">OMPExecutableDirective</a>&gt;...</td></tr>
+<tr><td colspan="4" class="doc" id="ompExecutableDirective0"><pre>Matches any ``#pragma omp`` executable directive.
+
+Given
+
+  #pragma omp parallel
+  #pragma omp parallel default(none)
+  #pragma omp taskyield
+
+``ompExecutableDirective()`` matches ``omp parallel``,
+``omp parallel default(none)`` and ``omp taskyield``.
+</pre></td></tr>
+
+
 <tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html">Stmt</a>&gt;</td><td class="name" onclick="toggle('opaqueValueExpr0')"><a name="opaqueValueExpr0Anchor">opaqueValueExpr</a></td><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1OpaqueValueExpr.html">OpaqueValueExpr</a>&gt;...</td></tr>
 <tr><td colspan="4" class="doc" id="opaqueValueExpr0"><pre>Matches opaque value expressions. They are used as helpers
 to reference another expressions and can be met
diff --git a/include/clang/ASTMatchers/ASTMatchers.h b/include/clang/ASTMatchers/ASTMatchers.h
index 1f3e1f936d..08a039e005 100644
--- a/include/clang/ASTMatchers/ASTMatchers.h
+++ b/include/clang/ASTMatchers/ASTMatchers.h
@@ -60,6 +60,7 @@
 #include "clang/AST/Stmt.h"
 #include "clang/AST/StmtCXX.h"
 #include "clang/AST/StmtObjC.h"
+#include "clang/AST/StmtOpenMP.h"
 #include "clang/AST/TemplateBase.h"
 #include "clang/AST/TemplateName.h"
 #include "clang/AST/Type.h"
@@ -6369,6 +6370,29 @@ AST_MATCHER(FunctionDecl, hasTrailingReturn) {
   return false;
 }
 
+//----------------------------------------------------------------------------//
+// OpenMP handling.
+//----------------------------------------------------------------------------//
+
+/// Matches any ``#pragma omp`` executable directive.
+///
+/// Given
+///
+/// \code
+///   #pragma omp parallel
+///   #pragma omp parallel default(none)
+///   #pragma omp taskyield
+/// \endcode
+///
+/// ``ompExecutableDirective()`` matches ``omp parallel``,
+/// ``omp parallel default(none)`` and ``omp taskyield``.
+extern const internal::VariadicDynCastAllOfMatcher<Stmt, OMPExecutableDirective>
+    ompExecutableDirective;
+
+//----------------------------------------------------------------------------//
+// End OpenMP handling.
+//----------------------------------------------------------------------------//
+
 } // namespace ast_matchers
 } // namespace clang
 
diff --git a/lib/ASTMatchers/ASTMatchersInternal.cpp b/lib/ASTMatchers/ASTMatchersInternal.cpp
index 8c75b76156..654a6c28c0 100644
--- a/lib/ASTMatchers/ASTMatchersInternal.cpp
+++ b/lib/ASTMatchers/ASTMatchersInternal.cpp
@@ -845,5 +845,8 @@ AST_TYPELOC_TRAVERSE_MATCHER_DEF(
     AST_POLYMORPHIC_SUPPORTED_TYPES(BlockPointerType, MemberPointerType,
                                     PointerType, ReferenceType));
 
+const internal::VariadicDynCastAllOfMatcher<Stmt, OMPExecutableDirective>
+    ompExecutableDirective;
+
 } // end namespace ast_matchers
 } // end namespace clang
diff --git a/lib/ASTMatchers/Dynamic/Registry.cpp b/lib/ASTMatchers/Dynamic/Registry.cpp
index 69b1b7da07..4982721b4e 100644
--- a/lib/ASTMatchers/Dynamic/Registry.cpp
+++ b/lib/ASTMatchers/Dynamic/Registry.cpp
@@ -434,6 +434,7 @@ RegistryMaps::RegistryMaps() {
   REGISTER_MATCHER(objcThrowStmt);
   REGISTER_MATCHER(objcTryStmt);
   REGISTER_MATCHER(ofClass);
+  REGISTER_MATCHER(ompExecutableDirective);
   REGISTER_MATCHER(on);
   REGISTER_MATCHER(onImplicitObjectArgument);
   REGISTER_MATCHER(opaqueValueExpr);
diff --git a/unittests/AST/OMPStructuredBlockTest.cpp b/unittests/AST/OMPStructuredBlockTest.cpp
index 4cb51c0a87..7b2028b07c 100644
--- a/unittests/AST/OMPStructuredBlockTest.cpp
+++ b/unittests/AST/OMPStructuredBlockTest.cpp
@@ -28,10 +28,6 @@ namespace {
 AST_MATCHER(Stmt, isOMPStructuredBlock) { return Node.isOMPStructuredBlock(); }
 
 const ast_matchers::internal::VariadicDynCastAllOfMatcher<
-    Stmt, OMPExecutableDirective>
-    ompExecutableDirective;
-
-const ast_matchers::internal::VariadicDynCastAllOfMatcher<
     OMPExecutableDirective, OMPTargetDirective>
     ompTargetDirective;
 
diff --git a/unittests/ASTMatchers/ASTMatchersNodeTest.cpp b/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
index 3f9981cd6d..4bce409cab 100644
--- a/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
+++ b/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
@@ -1765,5 +1765,29 @@ TEST(ObjCAutoreleaseMatcher, AutoreleasePool) {
   EXPECT_FALSE(matchesObjC(ObjCStringNoPool, autoreleasePoolStmt()));
 }
 
+TEST(OMPExecutableDirective, Matches) {
+  auto Matcher = stmt(ompExecutableDirective());
+
+  const std::string Source0 = R"(
+void x() {
+#pragma omp parallel
+;
+})";
+  EXPECT_TRUE(matchesWithOpenMP(Source0, Matcher));
+
+  const std::string Source1 = R"(
+void x() {
+#pragma omp taskyield
+;
+})";
+  EXPECT_TRUE(matchesWithOpenMP(Source1, Matcher));
+
+  const std::string Source2 = R"(
+void x() {
+;
+})";
+  EXPECT_TRUE(notMatchesWithOpenMP(Source2, Matcher));
+}
+
 } // namespace ast_matchers
 } // namespace clang
diff --git a/unittests/ASTMatchers/ASTMatchersTest.h b/unittests/ASTMatchers/ASTMatchersTest.h
index b22cafefd9..3f3118c2ef 100644
--- a/unittests/ASTMatchers/ASTMatchersTest.h
+++ b/unittests/ASTMatchers/ASTMatchersTest.h
@@ -235,6 +235,18 @@ testing::AssertionResult notMatchesWithCuda(const std::string &Code,
 }
 
 template <typename T>
+testing::AssertionResult matchesWithOpenMP(const std::string &Code,
+                                           const T &AMatcher) {
+  return matchesConditionally(Code, AMatcher, true, "-fopenmp");
+}
+
+template <typename T>
+testing::AssertionResult notMatchesWithOpenMP(const std::string &Code,
+                                              const T &AMatcher) {
+  return matchesConditionally(Code, AMatcher, false, "-fopenmp");
+}
+
+template <typename T>
 testing::AssertionResult
 matchAndVerifyResultConditionally(const std::string &Code, const T &AMatcher,
                                   std::unique_ptr<BoundNodesCallback> FindResultVerifier,