RFR: 8077364 "if( !this )" construct prevents build on Xcode 6.3

[Staffan Larsen]

Stefan, Volker: Thanks for the suggestions and spotting the errors.

new webrev: http://cr.openjdk.java.net/~sla/8077364/webrev.01/ <http://cr.openjdk.java.net/~sla/8077364/webrev.01/>

Thanks,
/Staffan

> On 14 apr 2015, at 10:54, Stefan Karlsson <stefan.karlsson at oracle.com> wrote:
> 
> Hi Staffan,
> 
> On 2015-04-14 09:54, Staffan Larsen wrote:
>> Please review this fix for compiling hotspot with clang 6.1.
>> 
>> I have verified that the compiler workarounds are still needed for these tests:
>> jdk/test/sun/misc/CopyMemory.java
>> hotspot/test/compiler/c2/5091921/
>> 
>> webrev: http://cr.openjdk.java.net/~sla/8077364/webrev.00 <http://cr.openjdk.java.net/~sla/8077364/webrev.00>
>> bug: https://bugs.openjdk.java.net/browse/JDK-8077364 <https://bugs.openjdk.java.net/browse/JDK-8077364>
> 
> What about this code that is protected by #ifndef PRODUCT
> 
> char *PhaseChaitin::dump_register( const Node *n, char *buf  ) const {
>  if( !this ) {                 // Not got anything?
>    sprintf(buf,"N%d",n->_idx); // Then use Node index
>  }
> 
> Thanks,
> StefanK
> 
>> 
>> Thanks,
>> /Staffan
>> 
>