[llvm-commits] [llvm] r126782 - /llvm/trunk/lib/Transforms/Scalar/CodeGenPrepare.cpp

[Chris Lattner]

On Mar 1, 2011, at 1:13 PM, Cameron Zwarich wrote:

> Author: zwarich
> Date: Tue Mar  1 15:13:53 2011
> New Revision: 126782
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=126782&view=rev
> Log:
> Stop computing the number of uses twice per value in CodeGenPrepare's sinking of
> addressing code. On 403.gcc this almost halves CodeGenPrepare time and reduces
> total llc time by 9.5%. Unfortunately, getNumUses() is still the hottest function
> in llc.

Wow!  Can this use hasNUsesOrMore() to avoid walking the entire use list of things with tons of uses?  Is this asking things like "i32 1" for the use count?  Maybe constants can be filtered earlier?

-Chris