Introduce a PCHContainerOperations interface (NFC).

A PCHContainerOperations abstract interface provides operations for
creating and unwrapping containers for serialized ASTs (precompiled
headers and clang modules). The default implementation is
RawPCHContainerOperations, which uses a flat file for the output.

The main application for this interface will be an
ObjectFilePCHContainerOperations implementation that uses LLVM to
wrap the module in an ELF/Mach-O/COFF container to store debug info
alongside the AST.

rdar://problem/20091852

llvm-svn: 240225

1 files changed, 9 insertions, 6 deletions

diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index dfc46f4..2417146 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -97,10 +97,11 @@ static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP,
 /// \brief Add an implicit \#include using the original file used to generate
 /// a PCH file.
 static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP,
+                                  const PCHContainerOperations &PCHContainerOps,
                                   StringRef ImplicitIncludePCH) {
   std::string OriginalFile =
-    ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(),
-                                     PP.getDiagnostics());
+      ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(),
+                                       PCHContainerOps, PP.getDiagnostics());
   if (OriginalFile.empty())
     return;
 
@@ -891,9 +892,10 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
 /// InitializePreprocessor - Initialize the preprocessor getting it and the
 /// environment ready to process a single file. This returns true on error.
 ///
-void clang::InitializePreprocessor(Preprocessor &PP,
-                                   const PreprocessorOptions &InitOpts,
-                                   const FrontendOptions &FEOpts) {
+void clang::InitializePreprocessor(
+    Preprocessor &PP, const PreprocessorOptions &InitOpts,
+    const PCHContainerOperations &PCHContainerOps,
+    const FrontendOptions &FEOpts) {
   const LangOptions &LangOpts = PP.getLangOpts();
   std::string PredefineBuffer;
   PredefineBuffer.reserve(4080);
@@ -952,7 +954,8 @@ void clang::InitializePreprocessor(Preprocessor &PP,
 
   // Process -include-pch/-include-pth directives.
   if (!InitOpts.ImplicitPCHInclude.empty())
-    AddImplicitIncludePCH(Builder, PP, InitOpts.ImplicitPCHInclude);
+    AddImplicitIncludePCH(Builder, PP, PCHContainerOps,
+                          InitOpts.ImplicitPCHInclude);
   if (!InitOpts.ImplicitPTHInclude.empty())
     AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude);