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| author | Max Kazantsev <max.kazantsev@azul.com> | 2019-02-06 07:49:17 +0000 |
|---|---|---|
| committer | Max Kazantsev <max.kazantsev@azul.com> | 2019-02-06 07:49:17 +0000 |
| commit | a4ccfc1841f90b0dbce3f4e36a97ca0901bf35d7 (patch) | |
| tree | 99d002bbbe5586c7e5f69d35653cdd7556394dae /llvm/lib/Transforms/Scalar/LoopSimplifyCFG.cpp | |
| parent | 0d7ad3c9a3ba14843eefaa75366c1718b20b201d (diff) | |
| download | bcm5719-llvm-a4ccfc1841f90b0dbce3f4e36a97ca0901bf35d7.tar.gz bcm5719-llvm-a4ccfc1841f90b0dbce3f4e36a97ca0901bf35d7.zip | |
[LoopSimplifyCFG] Do not count dead exit blocks twice, make CFG simpler
llvm-svn: 353276
Diffstat (limited to 'llvm/lib/Transforms/Scalar/LoopSimplifyCFG.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopSimplifyCFG.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopSimplifyCFG.cpp b/llvm/lib/Transforms/Scalar/LoopSimplifyCFG.cpp index 3bb25b0f570..dbe68d00c50 100644 --- a/llvm/lib/Transforms/Scalar/LoopSimplifyCFG.cpp +++ b/llvm/lib/Transforms/Scalar/LoopSimplifyCFG.cpp @@ -229,8 +229,10 @@ private: // Now, all exit blocks that are not marked as live are dead. SmallVector<BasicBlock *, 8> ExitBlocks; L.getExitBlocks(ExitBlocks); + SmallPtrSet<BasicBlock *, 8> UniqueDeadExits; for (auto *ExitBlock : ExitBlocks) - if (!LiveExitBlocks.count(ExitBlock)) + if (!LiveExitBlocks.count(ExitBlock) && + UniqueDeadExits.insert(ExitBlock).second) DeadExitBlocks.push_back(ExitBlock); // Whether or not the edge From->To will still be present in graph after the |
