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bv_decide/symbolic: simplify Add with remainder expressions as operands #934

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tobiasgrosser opened this issue Dec 30, 2024 · 0 comments
Open

bv_decide/symbolic: simplify Add with remainder expressions as operands #934

tobiasgrosser opened this issue Dec 30, 2024 · 0 comments
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tobiasgrosser commented Dec 30, 2024 •
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LLVM contains a collection of test cases of the form X % C0 + (( X / C0 ) % C1) * C0 to X % (C0 * C1) (where C0 * C1 does not overflow). These result in theorems such as the ones in:
https://github.com/opencompl/lean-mlir/blob/main/SSA/Projects/InstCombine/tests/proofs/gadd4_proof.lean.

https://grosser.zulipchat.com/#narrow/channel/446584-Project---Lean4---BitVectors/topic/slow.20division.20and.20transformation/near/491379687
@tobiasgrosser tobiasgrosser changed the title bv_normalize: bv_decide/symbolic: simplify Add with remainder expressions as operands Dec 31, 2024
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