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JS codegen: produce better code for constant sets

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This commit is contained in:
Andreas Rumpf 2017-05-01 09:30:56 +02:00
commit 56a5c249c9
2 changed files with 9 additions and 3 deletions
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10
compiler/jsgen.nim
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@ -1864,8 +1864,8 @@ proc genMagic(p: PProc, n: PNode, r: var TCompRes) =
proc genSetConstr(p: PProc, n: PNode, r: var TCompRes) =
var
a, b: TCompRes
useMagic(p, "SetConstr")
r.res = rope("SetConstr(")
useMagic(p, "setConstr")
r.res = rope("setConstr(")
r.kind = resExpr
for i in countup(0, sonsLen(n) - 1):
if i > 0: add(r.res, ", ")
@ -1878,6 +1878,12 @@ proc genSetConstr(p: PProc, n: PNode, r: var TCompRes) =
gen(p, it, a)
add(r.res, a.res)
add(r.res, ")")
# emit better code for constant sets:
if p.target == targetJS and isDeepConstExpr(n):
inc(p.g.unique)
let tmp = rope("ConstSet") & rope(p.g.unique)
addf(p.g.constants, "var $1 = $2;$n", [tmp, r.res])
r.res = tmp
proc genArrayConstr(p: PProc, n: PNode, r: var TCompRes) =
var a: TCompRes