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authorDiego Novillo <dnovillo@google.com>2013-12-02 14:08:27 +0000
committerDiego Novillo <dnovillo@google.com>2013-12-02 14:08:27 +0000
commit97add46aeea26db338f68f16aaf2587737ab46da (patch)
tree4319b8962e7a45ccf859745bef2087bc5e07ef07 /tools/gold
parentc15aff93c49dabb5ed174fd3731c7219e96af1f4 (diff)
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Fix dominator descendants for unreachable blocks.
When a block is unreachable, asking its dom tree descendants should return the empty set. However, the computation of the descendants was causing a segmentation fault because the dom tree node we get from the basic block is initially NULL. Fixed by adding a test for a valid dom tree node before we iterate. The patch also adds some unit tests to the existing dom tree tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196099 91177308-0d34-0410-b5e6-96231b3b80d8
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