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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 | 72bb66a4b8091293b0465b24d6162d1dd6c50818 (patch) | |
| tree | 36c2f071d4afbf75c16d21a7aead93f160efbd2c /llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | |
| parent | bb7dc538c7d2d27f850623bd1ffc83e574eecbbb (diff) | |
| download | bcm5719-llvm-72bb66a4b8091293b0465b24d6162d1dd6c50818.tar.gz bcm5719-llvm-72bb66a4b8091293b0465b24d6162d1dd6c50818.zip | |
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.
llvm-svn: 29559
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
0 files changed, 0 insertions, 0 deletions
