Introduce a new libclang parsing flag,

CXTranslationUnit_NestedMacroInstantiations, which indicates whether
we want to see "nested" macro instantiations (e.g., those that occur
inside other macro instantiations) within the detailed preprocessing
record. Many clients (e.g., those that only care about visible tokens)
don't care about this information, and in code that uses preprocessor
metaprogramming, this information can have a very high cost.

Addresses <rdar://problem/9389320>.

llvm-svn: 130990

1 files changed, 2 insertions, 2 deletions

diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index bad18ff02e2..bdc46f590fa 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -2382,7 +2382,7 @@ ASTReader::ASTReadResult ASTReader::ReadAST(const std::string &FileName,
       PP->getHeaderSearchInfo().SetExternalLookup(this);
     if (TotalNumPreallocatedPreprocessingEntities > 0) {
       if (!PP->getPreprocessingRecord())
-        PP->createPreprocessingRecord();
+        PP->createPreprocessingRecord(true);
       PP->getPreprocessingRecord()->SetExternalSource(*this,
                                      TotalNumPreallocatedPreprocessingEntities);
     }
@@ -2581,7 +2581,7 @@ void ASTReader::setPreprocessor(Preprocessor &pp) {
     TotalNum += Chain[I]->NumPreallocatedPreprocessingEntities;
   if (TotalNum) {
     if (!PP->getPreprocessingRecord())
-      PP->createPreprocessingRecord();
+      PP->createPreprocessingRecord(true);
     PP->getPreprocessingRecord()->SetExternalSource(*this, TotalNum);
   }
 }