RFR(XS): 8155738: C2: fix frame_complete_offset

[Vladimir Kozlov]

"In the debug build the call at output.cpp:1831 build if (n->size(_regalloc) < (current_offset-instr_offset)) overwrites 
the proper value."

So the fix is to not reset frame_complete_offset (Compile::_code_offsets._values[Frame_Complete]) when node is emitted 
into scratch buffer.

Changes looks good.

Thanks,
Vladimir

On 4/29/16 7:09 AM, Lindenmaier, Goetz wrote:
> Hi,
>
>
>
> In C2, frame_complete_offset is set wrong.  It’s also called during scratch_emit_size,
>
> which happens at least in the debug build.
>
> I also added the missing call on ppc.
>
>
>
> Please review this small fix.  I please need a sponsor:
>
> http://cr.openjdk.java.net/~goetz/wr16/8155738-frameCmplt/webrev.00/
>
>
>
> Thanks and best regards,
>
>   Goetz.
>