Add simple optimization: check for (and skip) spaces and tabs immediately
before lexing a token.  This speeds the common case where tokens are
separated by small amount of whitespace.  This makes a slight but
reproducible positive effect lexing a preprocessed carbon.h.

llvm-svn: 38691
1 file changed
tree: 3fded61f69745f196382345eb782ae664d53262e
  1. clang/
  2. llvm/
  3. stacker/