[OpenACC] Implement 'bind' ast/sema for 'routine' directive

The 'bind' clause allows the renaming of a function during code
generation.  There are a few rules about when this can/cannot happen,
and it takes either a string or identifier (previously mis-implemetned
as ID-expression) argument.

Note there are additional rules to this in the implicit-function routine
case, but that isn't implemented in this patch, as implicit-function
routine is not yet implemented either.

1 files changed, 11 insertions, 1 deletions

diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 0aa115e..d7328cc 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -8844,7 +8844,17 @@ void ASTRecordWriter::writeOpenACCClause(const OpenACCClause *C) {
     return;
   }
 
-  case OpenACCClauseKind::Bind:
+  case OpenACCClauseKind::Bind: {
+    const auto *BC = cast<OpenACCBindClause>(C);
+    writeSourceLocation(BC->getLParenLoc());
+    writeBool(BC->isStringArgument());
+    if (BC->isStringArgument())
+      AddStmt(const_cast<StringLiteral *>(BC->getStringArgument()));
+    else
+      AddIdentifierRef(BC->getIdentifierArgument());
+
+    return;
+  }
   case OpenACCClauseKind::Invalid:
     llvm_unreachable("Clause serialization not yet implemented");
   }