r205436 - Extend the SSE2 comment lexing to AVX2. Only 16byte align when not on AVX2.

[Chris Lattner]

On Apr 2, 2014, at 12:14 PM, Chris Lattner <clattner at apple.com> wrote:

> 
> On Apr 2, 2014, at 10:27 AM, Roman Divacky <rdivacky at freebsd.org> wrote:
> 
>> Author: rdivacky
>> Date: Wed Apr  2 12:27:03 2014
>> New Revision: 205436
>> 
>> URL: http://llvm.org/viewvc/llvm-project?rev=205436&view=rev
>> Log:
>> Extend the SSE2 comment lexing to AVX2. Only 16byte align when not on AVX2.
>> 
>> This provides some 3% speedup when preprocessing gcc.c as a single file.
> 
> Nice!
> 

I haven’t looked closely at them, but would any of the SSE 4.2 “string processing” instructions be helpful here?

-Chris