Fix for segfault reported in PR 11990

[Rafael Espíndola]

Is it possible to avoid changing the isSized interface? Maybe it could
be implemented as

static bool isSizedImpl(const StructType &Ty, SmallPtrSet<const Type*,
4> &Visited) {...}

bool StructType::isSized() const {
SmallPtrSet<const Type*, 4> Visited;
return isSizedImple(*this, Visited);
}


On 4 December 2013 16:09, Kaelyn Takata <rikka at google.com> wrote:
> Here's a patch that fixes the segfault in the verifier when trying to
> determine the size of a type of the form "%rt = type { %rt }" while checking
> an alloca of the type.
>
> I suspect this is also a candidate for the release branch, as it is a
> crasher that has apparently existed since the 3.0 release.
>
> Cheers,
> Kaelyn
>
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