[OpenACC] Implement 'modifier-list' sema/AST

OpenACC 3.3-NEXT has changed the way tags for copy, copyin, copyout, and
create clauses are specified, and end up adding a few extras, and
permits them as a list.  This patch encodes these as bitmask enum so
they can be stored succinctly, but still diagnose reasonably.

1 files changed, 4 insertions, 3 deletions

diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index f27be5f..a48c050 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -8715,6 +8715,7 @@ void ASTRecordWriter::writeOpenACCClause(const OpenACCClause *C) {
   case OpenACCClauseKind::PresentOrCopy: {
     const auto *CC = cast<OpenACCCopyClause>(C);
     writeSourceLocation(CC->getLParenLoc());
+    writeEnum(CC->getModifierList());
     writeOpenACCVarList(CC);
     return;
   }
@@ -8723,7 +8724,7 @@ void ASTRecordWriter::writeOpenACCClause(const OpenACCClause *C) {
   case OpenACCClauseKind::PresentOrCopyIn: {
     const auto *CIC = cast<OpenACCCopyInClause>(C);
     writeSourceLocation(CIC->getLParenLoc());
-    writeBool(CIC->isReadOnly());
+    writeEnum(CIC->getModifierList());
     writeOpenACCVarList(CIC);
     return;
   }
@@ -8732,7 +8733,7 @@ void ASTRecordWriter::writeOpenACCClause(const OpenACCClause *C) {
   case OpenACCClauseKind::PresentOrCopyOut: {
     const auto *COC = cast<OpenACCCopyOutClause>(C);
     writeSourceLocation(COC->getLParenLoc());
-    writeBool(COC->isZero());
+    writeEnum(COC->getModifierList());
     writeOpenACCVarList(COC);
     return;
   }
@@ -8741,7 +8742,7 @@ void ASTRecordWriter::writeOpenACCClause(const OpenACCClause *C) {
   case OpenACCClauseKind::PresentOrCreate: {
     const auto *CC = cast<OpenACCCreateClause>(C);
     writeSourceLocation(CC->getLParenLoc());
-    writeBool(CC->isZero());
+    writeEnum(CC->getModifierList());
     writeOpenACCVarList(CC);
     return;
   }