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Leonardo de Moura f2ef24696d perf(library/compiler/cse): make sure we eliminate common sub expressions in match-cases associated with 0-ary constructors 
The new test exposes the problem. Before this commit, the common
subexpressions at

```
def tst : tree → nat
| (tree.leaf v) := v
| (tree.node v l r) :=
  match f v with
  | tt := tst l + tst l - tst l   -- <<< HERE
  | ff := tst r
  end
```

were not converted into a let-exprs.
2017-11-09 13:32:15 -08:00
..
lean perf(library/compiler/cse): make sure we eliminate common sub expressions in match-cases associated with 0-ary constructors 2017-11-09 13:32:15 -08:00
.gitignore chore(tests/lean,shell/lean): run leantests and leanruntests in parallel 2017-03-30 06:04:00 +02:00