2 Commits

Author	SHA1	Message	Date
Dan Gohman	d115107ef2	Make Loop::getLoopLatch() work on loops which don't have preheaders, as ... it may be used in contexts where preheader insertion may have failed due to an indirectbr. Make LoopSimplify's LoopSimplify::SeparateNestedLoop properly fail in the case that it would require splitting an indirectbr edge. These fix PR5502. llvm-svn: 89484	2009-11-20 20:51:18 +00:00
Dan Gohman	f65735f0c5	The introduction of indirectbr meant the introduction of ... unsplittable critical edges, which means the introduction of loops which cannot be transformed to LoopSimplify form. Fix LoopSimplify to avoid transforming such loops into invalid code. llvm-svn: 86176	2009-11-05 21:14:46 +00:00