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codegen: do not produce empty loops; speeds up debug builds tremendously on Windows

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This commit is contained in:
Araq
2017-08-04 21:27:14 +02:00
parent d60da4f8f0
commit 153441db1d
1 changed files with 14 additions and 2 deletions
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16
compiler/ccgtrav.nim
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@@ -72,10 +72,16 @@ proc genTraverseProc(c: var TTraversalClosure, accessor: Rope, typ: PType) =
let arraySize = lengthOrd(typ.sons[0])
var i: TLoc
getTemp(p, getSysType(tyInt), i)
let oldCode = p.s(cpsStmts)
linefmt(p, cpsStmts, "for ($1 = 0; $1 < $2; $1++) {$n",
i.r, arraySize.rope)
let oldLen = p.s(cpsStmts).len
genTraverseProc(c, rfmt(nil, "$1[$2]", accessor, i.r), typ.sons[1])
lineF(p, cpsStmts, "}$n", [])
if p.s(cpsStmts).len == oldLen:
# do not emit dummy long loops for faster debug builds:
p.s(cpsStmts) = oldCode
else:
lineF(p, cpsStmts, "}$n", [])
of tyObject:
for i in countup(0, sonsLen(typ) - 1):
var x = typ.sons[i]
@@ -99,10 +105,16 @@ proc genTraverseProcSeq(c: var TTraversalClosure, accessor: Rope, typ: PType) =
assert typ.kind == tySequence
var i: TLoc
getTemp(p, getSysType(tyInt), i)
let oldCode = p.s(cpsStmts)
lineF(p, cpsStmts, "for ($1 = 0; $1 < $2->$3; $1++) {$n",
[i.r, accessor, rope(if c.p.module.compileToCpp: "len" else: "Sup.len")])
let oldLen = p.s(cpsStmts).len
genTraverseProc(c, "$1->data[$2]" % [accessor, i.r], typ.sons[0])
lineF(p, cpsStmts, "}$n", [])
if p.s(cpsStmts).len == oldLen:
# do not emit dummy long loops for faster debug builds:
p.s(cpsStmts) = oldCode
else:
lineF(p, cpsStmts, "}$n", [])
proc genTraverseProc(m: BModule, origTyp: PType; sig: SigHash;
reason: TTypeInfoReason): Rope =