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[add testcase] NRVO does not occur with init procedures (#19462)

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* [add testcase] NRVO does not occur with init procedures

close #19094

* Update tests/ccgbugs2/tcodegen.nim
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flywind 2022-01-29 21:06:54 +08:00 • committed by GitHub
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discard """
targets: "c cpp"
"""
# bug #19094
type
X = object
filler: array[2048, int]
innerAddress: uint
proc initX(): X =
result.innerAddress = cast[uint](result.addr)
proc initXInPlace(x: var X) =
x.innerAddress = cast[uint](x.addr)
block: # NRVO1
var x = initX()
let innerAddress = x.innerAddress
let outerAddress = cast[uint](x.addr)
doAssert(innerAddress == outerAddress) # [OK]
block: # NRVO2
var x: X
initXInPlace(x)
let innerAddress = x.innerAddress
let outerAddress = cast[uint](x.addr)
doAssert(innerAddress == outerAddress) # [OK]