[PATCH] [MC] bundle alignment: prevent padding instructions from crossing bundle boundaries

[Derek Schuff]

When bundle alignment is enabled, and a fragment is to be aligned to the
end of a bundle and it is too large to fit in the current bundle, it must
be pushed all the way to the end of the next bundle. However if a single
long nop instruction is used, it cannot cross the bundle boundary itself.
So, in this case, emit the padding in 2 pieces: one piece goes to the end
of the current bundle, and the other piece goes from there to where the
fragment starts.
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