> See above comments from Iain, even if that pre-initialization is removed it is
> still miscompiled.  And, the testcase fails not because of the padding bits 
> not
> being zero, but because the address of self stored into one of the fields 
> isn't
> there or modref thinks it can't be changed or set to that.  But for
> corresponding C++ it handles it ok.
Perhaps TREE_ADDRESSABLE on the type which is being used to test whether
return slot pointer may escape.

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