Implement caching of stat() calls for precompiled headers, which is
essentially the same thing we do with pretokenized headers. stat()
caching improves performance of the Cocoa-prefixed "Hello, World" by
45%.

llvm-svn: 70223
9 files changed
tree: 085759627adcb81591ae8ce3f22c33b2b86b18df
  1. clang/
  2. llvm/