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authorEvgeniy Stepanov <eugeni.stepanov@gmail.com>2012-12-17 14:28:00 +0000
committerEvgeniy Stepanov <eugeni.stepanov@gmail.com>2012-12-17 14:28:00 +0000
commit179481419851ca4bd3643dc89d3d83056246c4a8 (patch)
treead1ce1a000d8c57291acd4b30ee675e703d23308 /lib/VMCore/Core.cpp
parenta839ffc323396326ebdcf8d065c60be0bf05420d (diff)
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Optimize tree walking in markAliveBlocks.
Check whether a BB is known as reachable before adding it to the worklist. This way BB's with multiple predecessors are added to the list no more than once. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170335 91177308-0d34-0410-b5e6-96231b3b80d8
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