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Reuse the DominatorTree postorder travesal in BlockLoweringOrder (#5843)

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* Rework the blockorder module to reuse the dom tree's cfg postorder

* Update domtree tests

* Treat br_table with an empty jump table as multiple block exits

* Bless tests

* Change branch_idx to succ_idx and fix the comment
This commit is contained in:
Trevor Elliott
2023-02-23 14:05:20 -08:00
committed by GitHub
parent 4314210162
commit 8abfe928d6
175 changed files with 2936 additions and 3186 deletions
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18
cranelift/codegen/src/loop_analysis.rs
View File

@@ -417,25 +417,23 @@ mod tests {
}
let mut loop_analysis = LoopAnalysis::new();
let mut cfg = ControlFlowGraph::new();
let mut domtree = DominatorTree::new();
cfg.compute(&func);
domtree.compute(&func, &cfg);
let cfg = ControlFlowGraph::with_function(&func);
let domtree = DominatorTree::with_function(&func, &cfg);
loop_analysis.compute(&func, &cfg, &domtree);
let loops = loop_analysis.loops().collect::<Vec<Loop>>();
assert_eq!(loops.len(), 3);
assert_eq!(loop_analysis.loop_header(loops[0]), block0);
assert_eq!(loop_analysis.loop_header(loops[1]), block1);
assert_eq!(loop_analysis.loop_header(loops[2]), block3);
assert_eq!(loop_analysis.loop_header(loops[1]), block3);
assert_eq!(loop_analysis.loop_header(loops[2]), block1);
assert_eq!(loop_analysis.loop_parent(loops[1]), Some(loops[0]));
assert_eq!(loop_analysis.loop_parent(loops[2]), Some(loops[0]));
assert_eq!(loop_analysis.loop_parent(loops[0]), None);
assert_eq!(loop_analysis.is_in_loop(block0, loops[0]), true);
assert_eq!(loop_analysis.is_in_loop(block1, loops[1]), true);
assert_eq!(loop_analysis.is_in_loop(block2, loops[1]), true);
assert_eq!(loop_analysis.is_in_loop(block3, loops[2]), true);
assert_eq!(loop_analysis.is_in_loop(block4, loops[2]), true);
assert_eq!(loop_analysis.is_in_loop(block1, loops[2]), true);
assert_eq!(loop_analysis.is_in_loop(block2, loops[2]), true);
assert_eq!(loop_analysis.is_in_loop(block3, loops[1]), true);
assert_eq!(loop_analysis.is_in_loop(block4, loops[1]), true);
assert_eq!(loop_analysis.is_in_loop(block5, loops[0]), true);
assert_eq!(loop_analysis.loop_level(block0).level(), 1);
assert_eq!(loop_analysis.loop_level(block1).level(), 2);