PTH: Cache stat information for files in the PTH file. Hook up FileManager

 to use this stat information in the PTH file using a 'StatSysCallCache' object.

Performance impact (Cocoa.h, PTH):
- number of stat calls reduces from 1230 to 425
- fsyntax-only: time improves by 4.2% 

We can reduce the number of stat calls to almost zero by caching negative stat
calls and directory stat calls in the PTH file as well.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64353 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 1 deletions

diff --git a/include/clang/Lex/Preprocessor.h b/include/clang/Lex/Preprocessor.h
index 94a7ef45b3..5200725ba1 100644
--- a/include/clang/Lex/Preprocessor.h
+++ b/include/clang/Lex/Preprocessor.h
@@ -206,7 +206,7 @@ public:
   IdentifierTable &getIdentifierTable() { return Identifiers; }
   SelectorTable &getSelectorTable() { return Selectors; }
   
-  void setPTHManager(PTHManager* pm) { PTH.reset(pm); }
+  void setPTHManager(PTHManager* pm);
 
   /// SetCommentRetentionState - Control whether or not the preprocessor retains
   /// comments in output.