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d5d6cf3284
It turns our that the BranchFolder and IfCvt does not like unanalyzable branches that fall-through. This means that removing the unconditional branches from the end of tail predicated instruction can run into asserts and verifier issues. This effectively reverts 372eb2bbb6fb903ce76266e659dfefbaee67722b, but adds handling to t2DoLoopEndDec which are not branches, so can be safely skipped.
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