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fix term rewriting with sideeffect (#19410)

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* fix term rewriting with sideeffect

fix #6217

* add tests

* Update tests/template/template_various.nim
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flywind 2022-01-19 19:37:30 +08:00 • committed by GitHub
commit 5d34e81f23
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2 changed files with 24 additions and 2 deletions
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7
compiler/parampatterns.nim
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@ -143,8 +143,11 @@ proc checkForSideEffects*(n: PNode): TSideEffectAnalysis =
let s = op.sym
if sfSideEffect in s.flags:
return seSideEffect
# assume no side effect:
result = seNoSideEffect
elif tfNoSideEffect in op.typ.flags:
result = seNoSideEffect
else:
# assume side effect:
result = seSideEffect
elif tfNoSideEffect in op.typ.flags:
# indirect call without side effects:
result = seNoSideEffect