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| author | Ariel Ben-Yehuda <ariel.byd@gmail.com> | 2017-08-07 15:56:43 +0300 |
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| committer | Ariel Ben-Yehuda <ariel.byd@gmail.com> | 2017-08-07 16:00:31 +0300 |
| commit | 4e3a0b636fffdf9d514420681dc60ecbca221f42 (patch) | |
| tree | ff3462a7c52aec7ddee52e6d04e83afc765a1fce /src/rustllvm/RustWrapper.cpp | |
| parent | 91aff5775d3b4a95e2b0c2fe50785f3d28fa3dd8 (diff) | |
| download | rust-4e3a0b636fffdf9d514420681dc60ecbca221f42.tar.gz rust-4e3a0b636fffdf9d514420681dc60ecbca221f42.zip | |
rustc::middle::dataflow - visit the CFG in RPO
We used to propagate bits in node-id order, which sometimes caused an excessive number of iterations, especially when macros were present. As everyone knows, visiting the CFG in RPO bounds the number of iterators by 1 plus the depth of the most deeply nested loop (times the height of the lattice, which is 1). Fixes #43704.
Diffstat (limited to 'src/rustllvm/RustWrapper.cpp')
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