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optimization 2

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This commit is contained in:
Andrii Riabushenko
2019-12-31 12:10:27 +00:00
parent 1c21c79a9a
commit e918fa6ffc
1 changed files with 3 additions and 4 deletions
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7
compiler/injectdestructors.nim
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@@ -136,7 +136,7 @@ proc initialized(code: ControlFlowGraph; pc: int,
template isUnpackedTuple(n: PNode): bool =
## we move out all elements of unpacked tuples,
## hence unpacked tuples themselves don't need to be destroyed
n.kind == nkSym and n.sym.kind == skTemp and n.sym.typ.kind == tyTuple
(n.kind == nkSym and n.sym.kind == skTemp and n.sym.typ.kind == tyTuple)
proc checkForErrorPragma(c: Con; t: PType; ri: PNode; opname: string) =
var m = "'" & opname & "' is not available for type <" & typeToString(t) & ">"
@@ -619,9 +619,8 @@ proc moveOrCopy(dest, ri: PNode; c: var Con): PNode =
result.add p(ri, c, consumed)
of nkBracketExpr:
if isUnpackedTuple(ri[0]):
# unpacking of tuple: move out the elements
result = genSink(c, dest, ri)
result.add p(ri, c, consumed)
# unpacking of tuple: take over elements
result = newTree(nkFastAsgn, dest, p(ri, c, consumed))
elif isAnalysableFieldAccess(ri, c.owner) and isLastRead(ri, c):
# Rule 3: `=sink`(x, z); wasMoved(z)
var snk = genSink(c, dest, ri)