bug handling instructions with multiple delay slots

[Alan Lehotsky <lehotsky at tiac dot net>]

I'm still back on 2.8.1 (with some of egcs 1.1.2), and see the following
problems with reorg.

1/ if a DEFINE_DELAY describes an instruction with TWO dissimilar
    delay slots, we don't correctly handle validating the instruction
    that ends up in the N-th delay slot against the "condition" for
    that particular slot.

2/ I have a case where the first of two delay slots gets a CC0 setter
    and the second gets something that will clobber those condition
    codes.  [The setter comes from the branch-target, while the instruction
    that clobbers comes from the fall thru]

I believe that the second problem violates the axiom that the CC0 setter
and CC0 user are required to be adjacent instructions.  [I also suspect
that I have another bug in that I don't abort() detecting this in my
define_insn pattern for conditional branches...]

Before I go off and figure out how to fix these, I'm curious if
anyone else with a N-instruction delay slots has already fixed this
and not submitted the patches yet.

I am aware of the C4X code, and have most of their changes (and they
have some of mine, I think)

Regards,
Al Lehotsky
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