PTH:

- Encode the token length with 2 bytes instead of 4.
- This reduces the size of the .pth file for Cocoa.h by 12%.
- This speeds up PTH time (-Eonly) on Cocoa.h by 1.6%.

llvm-svn: 61364

1 files changed, 2 insertions, 4 deletions

diff --git a/clang/lib/Lex/PTHLexer.cpp b/clang/lib/Lex/PTHLexer.cpp
index 1038e3b70cc..252e2f87daa 100644
--- a/clang/lib/Lex/PTHLexer.cpp
+++ b/clang/lib/Lex/PTHLexer.cpp
@@ -26,7 +26,7 @@
 
 using namespace clang;
 
-#define DISK_TOKEN_SIZE (2+3*4)
+#define DISK_TOKEN_SIZE (2+4+4+2)
 
 //===----------------------------------------------------------------------===//
 // Utility methods for reading from the mmap'ed PTH file.
@@ -79,9 +79,7 @@ LexNextToken:
       | (((uint32_t) CurPtrShadow[9]) << 24);
   
   uint32_t Len = ((uint32_t) CurPtrShadow[10])
-      | (((uint32_t) CurPtrShadow[11]) << 8)
-      | (((uint32_t) CurPtrShadow[12]) << 16)
-      | (((uint32_t) CurPtrShadow[13]) << 24);
+      | (((uint32_t) CurPtrShadow[11]) << 8);
   
   CurPtr = (const char*) (CurPtrShadow + DISK_TOKEN_SIZE);