[Jikesrvm-core] Where can invokeinterface create an instanceof and int_ifcmp test?

[Ian R. <ian...@ma...>]

Hi,

still debugging from the IR verifier. I'm trying to work out when in 
generating the initial HIR it is possible for an invokeinterface 
bytecode to have created an instanceof test followed by an int_ifcmp. 
The problem is that they are being created and sharing a register operand:

VERIFY: Initial HIR In block BB72 for instruction     
instanceof_notnull      t308i(I) = 
Lspec/benchmarks/_202_jess/jess/_times;, 
l178a(Lspec/benchmarks/_202_jess/jess/Userfunction;), <unused> the back 
link in the def of operand t308i(I) is invalid and references     
int_ifcmp               t309v(GUARD) = t308i(I), 0, ==, LABEL88, 
Probability: 0.00999999

I'm determining the faulting bytecode from the bytecode index in a 
trace. The IRGen debugging options don't throw up anything useful.

Thanks,

Ian Rogers