ABataev added inline comments.

================
Comment at: clang/include/clang/AST/StmtOpenMP.h:291
+  /// the frontend.
+  OpenMPDirectiveKind PrevMappedDirective = llvm::omp::OMPD_unknown;
+
----------------
koops wrote:
> ABataev wrote:
> > I don't see where this field is stored/loaded for PCH support. You need add 
> > a support for this in Serialization.
> Since the ASTReader and ASTWriter are used by the developer of clang, it is 
> preferable to show the internal state of the compiler as is, e.g. if "#pragma 
> omp loop bind(parallel)" is changed to "#pragma omp for" then the ASTWriter 
> has to show it as "#pragma omp for". I can change it to "#pragma omp loop 
> bind(parallel)" using the MappedDirective that is stored however, that would 
> be misleading to the developer of clang.
How it is related to PCH? Try to serialize/deserialize the template and then 
try to create a new instance. There will be an issue since there is no 
serialization support, when you try to create new instance in the Rebuild... 
function (mapLoopConstruct will use OMPD_unknown as Prev value instead of 
oringal previous value, since it is not serialized/deserialized)


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D144634/new/

https://reviews.llvm.org/D144634

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