BF-607 Core Self Nesting IVG 11

I am using BF-607. I have a question regarding nesting of core interrupts.

1. Would different peripheral interrupts nest if I turn off the self-nesting bit in SYSCFG register since all the peripheral interrupts are routed to one core interrupt IVG 11. 

I assume IVG11 should interrupt itself for nesting to a different peripheral interrupt with higher priority.

Unrelated question to above topic.

1. Despite of turning off all optimizations by using -Oo compiler flag I don't see local variables in the variables window in CCES 2.7.0. I can see them when I use #pragma optimize_off in a file and its hard to do for all the thousands of files. Any suggestion would be appreciated?