Shark: Update to LLVM 4.2, add debugging

[Gary Benson]

Andrew Haley wrote:
> This bumps Shark to use LLVM 4.2.  A few changes were needed, in
> particular a workaround for a heinous LLVM bug

This is all the pointer_constant stuff?  Did you say that bug was
fixed in the latest svn?  If so, is this something that should be
reverted at a later date?

> ...it will run various benchmarks and it will also run Eclipse,
> at least until the JIT runs out of memory.

Is this http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=219 ?

>    };
> 
>    enum FrameType {
> -    ENTRY_FRAME = 1,
> +    ENTRY_FRAME = 0xCAFEBABE,
>      INTERPRETER_FRAME,
>      SHARK_FRAME,
>      DEOPTIMIZER_FRAME

What was this for?

This is all very cool BTW, I'm really looking forward to working
on Shark again :)

Cheers,
Gary

-- 
http://gbenson.net/