When loading an AST file, set SourceManager::MainFileID to the main file of the AST file,

as suggested by Tom Honermann.

llvm-svn: 147612

1 files changed, 1 insertions, 10 deletions

diff --git a/clang/lib/Frontend/FrontendAction.cpp b/clang/lib/Frontend/FrontendAction.cpp
index 6ef07c447da..7e4ae023d0e 100644
--- a/clang/lib/Frontend/FrontendAction.cpp
+++ b/clang/lib/Frontend/FrontendAction.cpp
@@ -310,16 +310,7 @@ void FrontendAction::Execute() {
 
   // Initialize the main file entry. This needs to be delayed until after PCH
   // has loaded.
-  if (isCurrentFileAST()) {
-    // Set the main file ID to an empty file.
-    //
-    // FIXME: We probably shouldn't need this, but for now this is the
-    // simplest way to reuse the logic in ParseAST.
-    const char *EmptyStr = "";
-    llvm::MemoryBuffer *SB =
-      llvm::MemoryBuffer::getMemBuffer(EmptyStr, "<dummy input>");
-    CI.getSourceManager().createMainFileIDForMemBuffer(SB);
-  } else {
+  if (!isCurrentFileAST()) {
     if (!CI.InitializeSourceManager(getCurrentFile()))
       return;
   }