[llvm-commits] [llvm-gcc-4.2] r51185 - /llvm-gcc-4.2/trunk/gcc/llvm-backend.cpp

[Chris Lattner]

On May 16, 2008, at 12:58 AM, Evan Cheng wrote:

> Author: evancheng
> Date: Fri May 16 02:58:08 2008
> New Revision: 51185
>
> URL: http://llvm.org/viewvc/llvm-project?rev=51185&view=rev
> Log:
> Re-enable tail duplication pass (now with default threshold down to  
> 1 instruction).

I understand that avoiding the regressions is very important in the  
short term.  However, please continue analyzing the cause of the perf  
regressions so that we can fix it another way.  The Jump Threading  
pass is probably a great way to handle the cases that matter...

-Chris