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Author SHA1 Message Date
Bill Wendling 97b9359623 Do trivial CSE of dead BBs during codegen preparation. 
Some BBs can become dead after codegen preparation. If we delete them here, it
could help enable tail-call optimizations later on.
<rdar://problem/10256573>

llvm-svn: 152002
 2012-03-04 10:46:01 +00:00
Evan Cheng 42401d6af2 Do not form thumb2 ldrd / strd if the offset is by multiple of 4. rdar://9133587 
llvm-svn: 127683
 2011-03-15 18:41:52 +00:00