Track recursion on LClosure not Proto. - #158
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This more accurately reflects "this is a recursive function" (using `Proto` overapproximates what we want). The tricky part of this commit is that, implemented naively, it causes `cl` to live longer which causes more expensive deopt (etc). Fortunately we can move the tracking `if`s earlier in the interpreter, avoiding this problem.
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This more accurately reflects "this is a recursive function" (using
Protooverapproximates what we want). The tricky part of this commit is that, implemented naively, it causesclto live longer which causes more expensive deopt (etc). Fortunately we can move the trackingifs earlier in the interpreter, avoiding this problem.