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| author | Evan Cheng <evan.cheng@apple.com> | 2006-08-08 00:31:00 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2006-08-08 00:31:00 +0000 |
| commit | f4b4c416d361e0f4523200a60d5fc290da1e8319 (patch) | |
| tree | b923bcbcaf1d1388fbbbb4daf19c6fe24fc5ada1 /lib/CodeGen/SelectionDAG/SelectionDAG.cpp | |
| parent | 080e187dfba3730b6eb45779c92f8aabb94c998a (diff) | |
Eliminate reachability matrix. It has to be calculated before any instruction
selection is done. That's rather expensive especially in situations where it
isn't really needed.
Move back to a searching the predecessors, but make use of topological order
to trim the search space.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29559 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
0 files changed, 0 insertions, 0 deletions