Duncan P. N. Exon Smith 38eea4a76f CodeGen: Avoid dereferencing end() in MachineScheduler ...

Check MachineInstr::isDebugValue for the same instruction as we're
calling isSchedBoundary, avoiding the possibility of dereferencing
end().

This is a functionality change even when I!=end().  Matthias had a look
and agrees this is the right resolution (as opposed to checking for
end()).

This is triggered by a huge number of tests, but they happen to
magically pass right now.  I found this because WIP patches for PR26753
convert them into crashes.

llvm-svn: 278394

2016-08-11 20:03:09 +00:00

128 KiB

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