[PATCH] [mips] Expand on r206218 to put the prologue_end marker in the correct place.

[Eric Christopher]

BTW I looked at this a while ago and it's a bit more complicated than
just moving it up so adding this patch in to the mips port (and, if
you don't mind a couple other ports) is probably the right way to go
for now.

-eric

http://reviews.llvm.org/D3511