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move analyser is smarter; refs #11053

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This commit is contained in:
Andreas Rumpf
2019-04-18 20:55:59 +02:00
parent abb05ab645
commit a394d31746
2 changed files with 17 additions and 9 deletions
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5
compiler/dfa.nim
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@@ -634,11 +634,14 @@ proc isAnalysableFieldAccess*(n: PNode; owner: PSym): bool =
# XXX Allow closure deref operations here if we know
# the owner controlled the closure allocation?
result = n.kind == nkSym and n.sym.owner == owner and
owner.kind != skModule and (n.sym.kind != skParam or isSinkParam(n.sym))
owner.kind != skModule and
(n.sym.kind != skParam or isSinkParam(n.sym)) # or n.sym.typ.kind == tyVar)
proc genDef(c: var Con; n: PNode) =
if n.kind == nkSym and n.sym.kind in InterestingSyms:
c.code.add Instr(n: n, kind: def, sym: n.sym)
elif isAnalysableFieldAccess(n, c.owner):
c.code.add Instr(n: n, kind: def, sym: nil)
proc canRaise(fn: PNode): bool =
const magicsThatCanRaise = {

21
compiler/injectdestructors.nim
View File

@@ -317,13 +317,12 @@ proc makePtrType(c: Con, baseType: PType): PType =
proc genOp(c: Con; t: PType; kind: TTypeAttachedOp; dest, ri: PNode): PNode =
var op = t.attachedOps[kind]
when false:
if op == nil:
# give up and find the canonical type instead:
let h = sighashes.hashType(t, {CoType, CoConsiderOwned})
let canon = c.graph.canonTypes.getOrDefault(h)
if canon != nil:
op = canon.attachedOps[kind]
if op == nil:
# give up and find the canonical type instead:
let h = sighashes.hashType(t, {CoType, CoConsiderOwned})
let canon = c.graph.canonTypes.getOrDefault(h)
if canon != nil:
op = canon.attachedOps[kind]
if op == nil:
globalError(c.graph.config, dest.info, "internal error: '" & AttachedOpToStr[kind] &
@@ -535,9 +534,15 @@ proc moveOrCopy(dest, ri: PNode; c: var Con): PNode =
if ri[0].kind == nkSym and isUnpackedTuple(ri[0].sym):
# unpacking of tuple: move out the elements
result = genSink(c, dest.typ, dest, ri)
result.add p(ri, c)
elif isAnalysableFieldAccess(ri, c.owner) and isLastRead(ri, c):
# Rule 3: `=sink`(x, z); wasMoved(z)
var snk = genSink(c, dest.typ, dest, ri)
snk.add ri
result = newTree(nkStmtList, snk, genWasMoved(ri, c))
else:
result = genCopy(c, dest.typ, dest, ri)
result.add p(ri, c)
result.add p(ri, c)
of nkStmtListExpr:
result = newNodeI(nkStmtList, ri.info)
for i in 0..ri.len-2: