Richard Biener
a737da4885
This improves the edge avoidance heuristic by re-ordering the topological sort of the graph to make sure the component with the ESCAPED node is processed first. This improves the number of created edges which directly correlates with the number of bitmap_ior_into calls from 141447426 to 239596 and the compile-time from 1083s to 3s. It also improves the compile-time for the related PR109143 from 81s to 27s. I've modernized the topological sorting API on the way as well. PR ipa/109983 PR tree-optimization/109143 * tree-ssa-structalias.cc (struct topo_info): Remove. (init_topo_info): Likewise. (free_topo_info): Likewise. (compute_topo_order): Simplify API, put the component with ESCAPED last so it's processed first. (topo_visit): Adjust. (solve_graph): Likewise. (cherry picked from commit 95e5c38a98cc64a797b1d766a20f8c0d0c807a74)
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