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[vm]fixes #15974 #12551 #19464 #16020 #16780 #16613 #14553 #19909 #18641 (#19902) [backport]

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* revert #12217 since the root problem seems to have been fixed; fix #15974;fix #12551; fix #19464

* fix #16020; fix #16780

* fix tests and #16613

* fix #14553

* fix #19909; skip skipRegisterAddr

* fix #18641
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flywind 2022-06-22 14:43:58 +08:00 • committed by GitHub
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compiler/vmgen.nim
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@ -1382,9 +1382,6 @@ proc unneededIndirection(n: PNode): bool =
n.typ.skipTypes(abstractInstOwned-{tyTypeDesc}).kind == tyRef
proc canElimAddr(n: PNode): PNode =
if n[0].typ.skipTypes(abstractInst).kind in {tyObject, tyTuple, tyArray}:
# objects are reference types in the VM
return n[0]
case n[0].kind
of nkObjUpConv, nkObjDownConv, nkChckRange, nkChckRangeF, nkChckRange64:
var m = n[0][0]