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added system.newSeqOfCap for improved efficiency

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This commit is contained in:
Andreas Rumpf 2016-07-15 17:04:14 +02:00
commit b7c1be03c8
7 changed files with 47 additions and 4 deletions
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11
compiler/ccgexprs.nim
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@ -1141,6 +1141,16 @@ proc genNewSeq(p: BProc, e: PNode) =
genNewSeqAux(p, a, b.rdLoc)
gcUsage(e)
proc genNewSeqOfCap(p: BProc; e: PNode; d: var TLoc) =
let seqtype = skipTypes(e.typ, abstractVarRange)
var a: TLoc
initLocExpr(p, e.sons[1], a)
putIntoDest(p, d, e.typ, ropecg(p.module,
"($1)#nimNewSeqOfCap($2, $3)", [
getTypeDesc(p.module, seqtype),
genTypeInfo(p.module, seqtype), a.rdLoc]))
gcUsage(e)
proc genObjConstr(p: BProc, e: PNode, d: var TLoc) =
var tmp: TLoc
var t = e.typ.skipTypes(abstractInst)
@ -1712,6 +1722,7 @@ proc genMagicExpr(p: BProc, e: PNode, d: var TLoc, op: TMagic) =
of mNew: genNew(p, e)
of mNewFinalize: genNewFinalize(p, e)
of mNewSeq: genNewSeq(p, e)
of mNewSeqOfCap: genNewSeqOfCap(p, e, d)
of mSizeOf:
let t = e.sons[1].typ.skipTypes({tyTypeDesc})
putIntoDest(p, d, e.typ, "((NI)sizeof($1))" % [getTypeDesc(p.module, t)])