diff options
Diffstat (limited to 'llvm/lib/CodeGen/MachineBlockPlacement.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineBlockPlacement.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MachineBlockPlacement.cpp b/llvm/lib/CodeGen/MachineBlockPlacement.cpp index e23f90be409..4cfc128a8c1 100644 --- a/llvm/lib/CodeGen/MachineBlockPlacement.cpp +++ b/llvm/lib/CodeGen/MachineBlockPlacement.cpp @@ -1165,6 +1165,9 @@ void MachineBlockPlacement::precomputeTriangleChains() { } } + // Iterating over a DenseMap is safe here, because the only thing in the body + // of the loop is inserting into another DenseMap (ComputedEdges). + // ComputedEdges is never iterated, so this doesn't lead to non-determinism. for (auto &ChainPair : TriangleChainMap) { TriangleChain &Chain = ChainPair.second; // Benchmarking has shown that due to branch correlation duplicating 2 or |
