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Commit ed627385 authored by Dan Gohman's avatar Dan Gohman
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Make use of getUMinFromMismatchedTypes when computing backedge-taken 

counts for loops with multiple exits, replacing more conservative code
which only handled constants. This is derived from a patch by
Nick Lewycky.

This also fixes llc aborts in ClamAV and others, as
getUMinFromMismatchedTypes takes care of balancing the types before
working with them.

llvm-svn: 73884
parent 2bc22305
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