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ARC: misc bugfixes (#13156)

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* fixes #13102
* closes #13149
* ARC: fixes a move optimizer bug (there are more left regarding array and tuple indexing)
* proper fix; fixes #12957
* fixes yet another case object '=' code generation problem
This commit is contained in:
Andreas Rumpf 2020-01-15 22:13:31 +01:00 • committed by GitHub
commit a5e67071d2
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6 changed files with 298 additions and 26 deletions
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3
compiler/injectdestructors.nim
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@ -673,7 +673,8 @@ proc moveOrCopy(dest, ri: PNode; c: var Con): PNode =
if isUnpackedTuple(ri[0]):
# unpacking of tuple: take over elements
result = newTree(nkFastAsgn, dest, p(ri, c, consumed))
elif isAnalysableFieldAccess(ri, c.owner) and isLastRead(ri, c):
elif isAnalysableFieldAccess(ri, c.owner) and isLastRead(ri, c) and
not aliases(dest, ri):
# Rule 3: `=sink`(x, z); wasMoved(z)
var snk = genSink(c, dest, ri)
snk.add ri