RFR(XS): 8161907: adlc: Fix crash in cisc_spill_match if _rChild == NULL"

[Lindenmaier, Goetz]

Hi,

Could someone please sponsor this small fix?  
I rebased the change and added the Reviewed-by annotation:
http://cr.openjdk.java.net/~goetz/wr16/8161907-adlc/webrev.01

Best regards,
  Goetz.


> -----Original Message-----
> From: hotspot-compiler-dev [mailto:hotspot-compiler-dev-
> bounces at openjdk.java.net] On Behalf Of Lindenmaier, Goetz
> Sent: Mittwoch, 20. Juli 2016 22:48
> To: 'Vladimir Kozlov' <vladimir.kozlov at oracle.com>; hotspot-compiler-
> dev at openjdk.java.net
> Subject: RE: RFR(XS): 8161907: adlc: Fix crash in cisc_spill_match if _rChild ==
> NULL"
> 
> Thanks Vladimir!
> 
> Best regards,
>   Goetz.
> 
> > -----Original Message-----
> > From: Vladimir Kozlov [mailto:vladimir.kozlov at oracle.com]
> > Sent: Wednesday, July 20, 2016 5:52 PM
> > To: Lindenmaier, Goetz <goetz.lindenmaier at sap.com>; hotspot-compiler-
> > dev at openjdk.java.net
> > Subject: Re: RFR(XS): 8161907: adlc: Fix crash in cisc_spill_match if _rChild
> ==
> > NULL"
> >
> > Looks good.
> >
> > Thanks,
> > Vladimir
> >
> > On 7/20/16 3:39 AM, Lindenmaier, Goetz wrote:
> > > Hi,
> > >
> > >
> > >
> > > Please review and sponsor this tiny, rather obvious change:
> > >
> > > http://cr.openjdk.java.net/~goetz/wr16/8161907-adlc/
> > >
> > >
> > >
> > > _rChild is never checked for NULL, but it is dereferenced.
> > >
> > > We have a rule that causes a crash here.
> > >
> > >
> > >
> > > Best regards,
> > >
> > >   Goetz.
> > >
> > >
> > >