[llvm-commits] [llvm] r67586 - /llvm/trunk/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp

[Chris Lattner]

On Mar 23, 2009, at 5:49 PM, Dan Gohman wrote:

> Author: djg
> Date: Mon Mar 23 19:49:12 2009
> New Revision: 67586
>
> URL: http://llvm.org/viewvc/llvm-project?rev=67586&view=rev
> Log:
> Add a pre-pass to the burr-list scheduler which makes adjustments to
> help out the register pressure reduction heuristics in the case of
> nodes with multiple uses. Currently this uses very conservative
> heuristics, so it doesn't have a broad impact, but in cases where it
> does help it can make a big difference.

Testcase?  It would be nice to not lose the "big difference" in the  
future.

-Chris