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Commit 0ab2b0df authored by Richard Osborne's avatar Richard Osborne
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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
parent f02c6069
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