Add 'UseBumpPtrAllocator' flag to ASTUnit::LoadFromPCHFile() to cause the created ASTContext to use

its own BumpPtrAllocator to allocate ASTs.

Change clang_createTranslationUnit (CIndex) to pass 'UseBumpPtrAllocator = true' to
ASTUnit::LoadFromPCHFile().

llvm-svn: 84296

1 files changed, 3 insertions, 2 deletions

diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
index 15002385a8c..7ee66486998 100644
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -95,7 +95,8 @@ ASTUnit *ASTUnit::LoadFromPCHFile(const std::string &Filename,
                                   Diagnostic &Diags,
                                   FileManager &FileMgr,
                                   std::string *ErrMsg,
-                                  bool OnlyLocalDecls) {
+                                  bool OnlyLocalDecls,
+                                  bool UseBumpAllocator) {
   llvm::OwningPtr<ASTUnit> AST(new ASTUnit(Diags));
   AST->OnlyLocalDecls = OnlyLocalDecls;
   AST->HeaderInfo.reset(new HeaderSearch(FileMgr));
@@ -146,7 +147,7 @@ ASTUnit *ASTUnit::LoadFromPCHFile(const std::string &Filename,
                                 PP.getIdentifierTable(),
                                 PP.getSelectorTable(),
                                 PP.getBuiltinInfo(),
-                                /* FreeMemory = */ true,
+                                /* FreeMemory = */ !UseBumpAllocator,
                                 /* size_reserve = */0));
   ASTContext &Context = *AST->Ctx.get();