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Author SHA1 Message Date
Richard Osborne 0ab2b0df82 Fix assertion in jump threading (PR13405). 
GetBestDestForJumpOnUndef() assumes there is at least 1 successor, which isn't
true if the block ends in an indirect branch with no successors. Fix this by
bailing out earlier in this case.

llvm-svn: 160546
 2012-07-20 10:36:17 +00:00