[OpenACC] Implement 'delete' AST/Sema for 'exit data' construct

'delete' is another clause that has very little compile-time
implication, but needs a full AST that takes a var list.  This patch
ipmlements it fully, plus adds sufficient test coverage.

1 files changed, 20 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaOpenACC.cpp b/clang/lib/Sema/SemaOpenACC.cpp
index 7156e37..7af209aa 100644
--- a/clang/lib/Sema/SemaOpenACC.cpp
+++ b/clang/lib/Sema/SemaOpenACC.cpp
@@ -425,6 +425,15 @@ bool doesClauseApplyToDirective(OpenACCDirectiveKind DirectiveKind,
       return false;
     }
   }
+  case OpenACCClauseKind::Delete: {
+    switch (DirectiveKind) {
+    case OpenACCDirectiveKind::ExitData:
+      return true;
+    default:
+      return false;
+    }
+  }
+
   case OpenACCClauseKind::Detach: {
     switch (DirectiveKind) {
     case OpenACCDirectiveKind::ExitData:
@@ -1066,6 +1075,17 @@ OpenACCClause *SemaOpenACCClauseVisitor::VisitDetachClause(
                                      Clause.getEndLoc());
 }
 
+OpenACCClause *SemaOpenACCClauseVisitor::VisitDeleteClause(
+    SemaOpenACC::OpenACCParsedClause &Clause) {
+  // ActOnVar ensured that everything is a valid variable reference, so there
+  // really isn't anything to do here. GCC does some duplicate-finding, though
+  // it isn't apparent in the standard where this is justified.
+  return OpenACCDeleteClause::Create(Ctx, Clause.getBeginLoc(),
+                                     Clause.getLParenLoc(), Clause.getVarList(),
+                                     Clause.getEndLoc());
+}
+
+
 OpenACCClause *SemaOpenACCClauseVisitor::VisitDevicePtrClause(
     SemaOpenACC::OpenACCParsedClause &Clause) {
   // Restrictions only properly implemented on 'compute'/'combined'/'data'