Carl Friedrich Bolz wrote:
...
It is actually the replace_gc_(un)protect code that you wrote. The
problem is that you replace an operation
v0 = gc_unprotect(obj)
with no operation. That means that afterwards v0 is undefined. For some
reason the checkgraph in the gctransformer was removed at one point (I
thought there was one there), so you found this problem only _much_
later in the backend optimizations.
I wasn't aware that I cannot remove an operation.
This is not entirely your fault, the
problem is indeed that gctransformer is a mess, you should not have to
care for generating a
v0 = same_as(Constant(None, Void))
yourself. The transformer definitively needs some refactoring.
I don't care who's faults faults are, they are there to be made
and then to be removed.
ciao - chris
--
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