Extending RTL expansion and CG with a new operation

[Pranav Bhandarkar]

> kerneltest.c:22: error: unrecognizable insn:
> (jump_insn 26 25 29 3 (set (pc)
>         (create_body_after (cre (reg:DI 75)
>                 (const_int 0 [0x0]))
>             (label_ref 13)
>             (pc))) -1 (nil)
>     (nil))
> kerneltest.c:22: internal compiler error: in extract_insn, at recog.c:2096
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <URL:http://gcc.gnu.org/bugs.html> for instructions.
>
Find a pattern that is close to this one in your md file ( i.e. the
define_insn that you think should match this pattern, assuming such a
define_insn exists in your md file) and then try to check the reason
for recog crashing. IMO, the predicate may not be passing.

regards,
Pranav