[cfe-commits] [PATCH] Allow PCHReader to be used without having a pre-initialized Preprocessor

[Chris Lattner]

On Jun 18, 2009, at 12:16 PM, Sebastian Redl wrote:

> Chris Lattner wrote:
>> Even at -O4 we want to do inlining and other optimization at compile
>> time.
> Why?

Among other things, early optimizations shrink code size.  As a silly  
example, in llvm, "isa<foo>(p)" usually inlines down to one load and a  
compare.  You can't do that if the templates for isa<foo> aren't  
instantiated.

-Chris