Guard recursion in will_simplify_with_ireduce#7882
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fitzgen merged 1 commit intobytecodealliance:mainfrom Feb 7, 2024
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Guard recursion in will_simplify_with_ireduce#7882fitzgen merged 1 commit intobytecodealliance:mainfrom
will_simplify_with_ireduce#7882fitzgen merged 1 commit intobytecodealliance:mainfrom
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Add a test to expose issues with unbounded recursion through `iadd` during egraph rewrites, and bound the recursion of `will_simplify_with_ireduce`. Fixes bytecodealliance#7874 Co-authored-by: Nick Fitzgerald <fitzgen@gmail.com>
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Add a test to expose issues with unbounded recursion through `iadd` during egraph rewrites, and bound the recursion of `will_simplify_with_ireduce`. Fixes bytecodealliance#7874 Co-authored-by: Nick Fitzgerald <fitzgen@gmail.com>
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Add a test to expose issues with unbounded recursion through `iadd` during egraph rewrites, and bound the recursion of `will_simplify_with_ireduce`. Fixes #7874 Co-authored-by: Nick Fitzgerald <fitzgen@gmail.com>
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Add a test to expose issues with unbounded recursion through `iadd` during egraph rewrites, and bound the recursion of `will_simplify_with_ireduce`. Fixes bytecodealliance#7874 Co-authored-by: Nick Fitzgerald <fitzgen@gmail.com>
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* Guard recursion in `will_simplify_with_ireduce` (#7882) Add a test to expose issues with unbounded recursion through `iadd` during egraph rewrites, and bound the recursion of `will_simplify_with_ireduce`. Fixes #7874 Co-authored-by: Nick Fitzgerald <fitzgen@gmail.com> * Cranelift: Use a fixpoint loop to compute the best value for each eclass (#7859) * Cranelift: Use a fixpoint loop to compute the best value for each eclass Fixes #7857 * Remove fixpoint loop early-continue optimization * Add document describing optimization rule invariants * Make select optimizations use subsume * Remove invalid debug assert * Remove now-unused methods * Add commutative adds to cost tests * Add missing subsume uses in egraph rules (#7879) * Fix a few egraph rules that needed `subsume` There were a few rules that dropped value references from the LHS without using subsume. I think they were probably benign as they produced constant results, but this change is in the spirit of our revised guidelines for egraph rules. * Augment egraph rule guideline 2 to talk about constants * Update release notes --------- Co-authored-by: Nick Fitzgerald <fitzgen@gmail.com>
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Expose the underlying issue of #7874 by adding a test with a long chain of additions, and then fix the bug by bounding the recursion of
will_simplify_with_ireduce.Reading through the changes in #7719, it seemed like the recursive cases in
will_simplify_with_ireducewere missing two things:reducible_modular_opbefore the recursion, which showed up in the entry-point insimplifyThis PR makes both of these changes, and resolves the compilation time issues reported in #7874. The depth bound was arbitrary, and it would be fine to increase it if necessary.
Fixes #7874