JIT: Try to reuse profile-aware DFS tree throughout backend #112105
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Diffs are bigger than I expected, and the different traversal order sometimes gets profile repair to run for more iterations, pushing the TP cost up. |
amanasifkhalid
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Feb 5, 2025
Revival of #112105. Add a switch to FlowGraphDfsTree that indicates if its traversal used edge likelihoods to determine the order in which successors were visited. This switch can then be used by debug checks that verify the DFS's correctness to check both types of trees. This functionality means we can frequently reuse the DFS tree annotations computed by LSRA throughout block layout.
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Waiting for #111915 to go through.