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Summary: Nested if statements can generate empty BBs whose terminator branches unconditionally to its successor. These branches are not eliminated to help generate better line number information in some cases, but there is no reason to keep the empty blocks that result from nested ifs. Reviewers: mehdi_amini, dblaikie, echristo Subscribers: mehdi_amini, cfe-commits Differential review: http://reviews.llvm.org/D11360 llvm-svn: 275115