svn commit: r255804 - in head/contrib/llvm/lib: CodeGen/SelectionDAG Target/AArch64 Target/ARM Target/Hexagon Target/MSP430 Target/Mips Target/NVPTX Target/PowerPC Target/R600 Target/Sparc Target/S...

[Dimitry Andric]

On Sep 23, 2013, at 02:19, Bryan Drewery <bdrewery at FreeBSD.org> wrote:
> On 9/22/2013 5:03 PM, Dimitry Andric wrote:
>> Author: dim
>> Date: Sun Sep 22 22:03:30 2013
>> New Revision: 255804
>> URL: http://svnweb.freebsd.org/changeset/base/255804
>> 
>> Log:
>>  Pull in r191165 from upstream llvm trunk:
>> 
>>    ISelDAG: spot chain cycles involving MachineNodes
>> 
>>    Previously, the DAGISel function WalkChainUsers was spotting that it
>>    had entered already-selected territory by whether a node was a
>>    MachineNode (amongst other things). Since it's fairly common practice
>>    to insert MachineNodes during ISelLowering, this was not the correct
>>    check.
>> 
>>    Looking around, it seems that other nodes get their NodeId set to -1
>>    upon selection, so this makes sure the same thing happens to all
>>    MachineNodes and uses that characteristic to determine whether we
>>    should stop looking for a loop during selection.
>> 
>>    This should fix PR15840.
> 
> 15840 is for x11-fonts/ucs-fixed. Did you put the wrong one?

No, this is a quote from the upstream commit message, which is referring
to http://llvm.org/PR15840 :-)

-Dimitry

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