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re: kern/51322

>  (when gdb says "optimized out", it doesn't mean that the value's not
>  there, it means gdb doesn't know how to find it because it's e.g. in
>  some scratch register and not in what gdb thinks of as a "variable")


several times i've looked at this and GCC is usually failing to
emit useful debug info.  when studying the asm, you can often
find the value in a register.


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