tree c62ef5b91bb24502185e27cb5635250972eba8d0
parent e1d2584d446c459e19c076142ea5b8d483e0d733
author Evan Cheng <evan.cheng@apple.com> 1300670349 +0000
committer Evan Cheng <evan.cheng@apple.com> 1300670349 +0000

Re-apply r127953 with fixes: eliminate empty return block if it has no predecessors; update dominator tree if cfg is modified.

llvm-svn: 127981