[llvm-commits] [llvm] r114312 - /llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

[Owen Anderson]

On Sep 19, 2010, at 1:12 PM, Chris Lattner wrote:

> 
> On Sep 19, 2010, at 12:51 PM, Owen Anderson wrote:
> 
>> Author: resistor
>> Date: Sun Sep 19 14:51:55 2010
>> New Revision: 114312
>> 
>> URL: http://llvm.org/viewvc/llvm-project?rev=114312&view=rev
>> Log:
>> Tentatively enabled DAGCombiner Alias Analysis by default.  As far as I know,
>> r114268 fixed the last of the blockers to enabling it.  I will be monitoring
>> for failures.
> 
> What is the compile-time performance impact of this?

It exists, but doesn't seem to be very large.  I've measure a codegen time slowdown of ~1% on 403.gcc, for instance.

--Owen