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| author |  Adam Chlipala <adam@chlipala.net> | 2015-02-01 12:29:14 -0500 |
|---|---|---|
| committer | Adam Chlipala <adam@chlipala.net> | 2015-02-01 12:29:14 -0500 |
| commit | 6413f39758d223c6763c4bbe708048b4e570a98e (patch) | |
| tree | df37df1329c579861b6337d2de241d67084f9618 | |
| parent | 1a063e0d926ebaf414349df3854af12369c81f5a (diff) | |
A new MonoReduce optimization for lifting 'let' out of field projection; JavaScript compilation for exponentiation
| -rw-r--r-- | lib/js/urweb.js | 4 | ||||
| -rw-r--r-- | src/jscomp.sml | 2 | ||||
| -rw-r--r-- | src/mono_reduce.sml | 17 |
3 files changed, 19 insertions, 4 deletions
diff --git a/lib/js/urweb.js b/lib/js/urweb.js index df9097b1..3bf21dd2 100644 --- a/lib/js/urweb.js +++ b/lib/js/urweb.js @@ -112,6 +112,10 @@ function round(n) { return Math.round(n); } +function pow(n, m) { + return Math.pow(n, m); +} + // Time, represented as counts of microseconds since the epoch diff --git a/src/jscomp.sml b/src/jscomp.sml index 1a476739..3709bcd3 100644 --- a/src/jscomp.sml +++ b/src/jscomp.sml @@ -724,6 +724,8 @@ fun process (file : file) = | "<" => "lt" | "<=" => "le" | "strcmp" => "strcmp" + | "powl" => "pow" + | "powf" => "pow" | _ => raise Fail ("Jscomp: Unknown binary operator " ^ s) val (e1, st) = jsE inner (e1, st) diff --git a/src/mono_reduce.sml b/src/mono_reduce.sml index 8ca84c15..39d02b99 100644 --- a/src/mono_reduce.sml +++ b/src/mono_reduce.sml @@ -818,10 +818,19 @@ fun reduce (file : file) = search pes end - | EField ((ERecord xes, _), x) => - (case List.find (fn (x', _, _) => x' = x) xes of - SOME (_, e, _) => #1 e - | NONE => e) + | EField (e1, x) => + let + fun yankLets (e : exp) = + case #1 e of + ELet (x, t, e1, e2) => (ELet (x, t, e1, yankLets e2), #2 e) + | ERecord xes => + (case List.find (fn (x', _, _) => x' = x) xes of + SOME (_, e, _) => e + | NONE => (EField (e, x), #2 e)) + | _ => (EField (e, x), #2 e) + in + #1 (yankLets e1) + end | ELet (x1, t1, (ELet (x2, t2, e1, b1), loc), b2) => let |