Files
lean4/tests/elab_bench/simp_subexpr.lean
Garmelon 08eb78a5b2 chore: switch to new test/bench suite (#12590)
This PR sets up the new integrated test/bench suite. It then migrates
all benchmarks and some related tests to the new suite. There's also
some documentation and some linting.

For now, a lot of the old tests are left alone so this PR doesn't become
even larger than it already is. Eventually, all tests should be migrated
to the new suite though so there isn't a confusing mix of two systems.
2026-02-25 13:51:53 +00:00

42 lines
1.2 KiB
Lean4

/-!
A micro-benchmark based on `simp_bubblesort`, designed specifically to use the subexpression
cache for rewriting in `simp`.
-/
inductive V where | a | b
open V
axiom L : Type
axiom N : Type
axiom z : N
axiom s : N N
axiom nil : L
axiom f : V L L
axiom iter : N (L L) (L L)
axiom combine : L L L
axiom swap : f b (f a xs) = f a (f b xs)
axiom iter_zero : iter z g x = g x
axiom iter_succ : iter (s i) g x = iter i g (iter i g x)
noncomputable def steps : N := s (s (s (s (s (s (s z))))))
set_option maxRecDepth 100000
set_option profiler true
syntax "tree(" num "," term "," term ")" : term
macro_rules
| `(tree($n, $l, $r)) =>
match n.getNat with
| 0 => `(combine $l $r)
| n + 1 => `(combine tree($(Lean.quote n), $l, $r) tree($(Lean.quote n), $r, $l))
-- If run with -memoize or caching fails otherwise this regresses to timeout
theorem normalized:
tree(0, (iter steps (f a) (iter steps (f b) nil)), (iter steps (f b) (iter steps (f a) nil))) =
tree(0, (iter steps (f b) (iter steps (f a) nil)), (iter steps (f a) (iter steps (f b) nil))) :=
by simp (maxSteps := 1000000) only [swap, iter_zero, iter_succ, steps]