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Re: Serious code generation/optimisation bug (I think)

Paolo Bonzini wrote:
>>>> Not for PTA though ;)
>>> Care to expand?
>> PTA tracks points-to-NULL as pointing to "nothing".
>> This probably should be conditional on -fdelete-null-pointer-checks.
>> Otherwise *NULL and *anything won't alias.
> 
> Yes, you're right.  I'll see if I can construct a testcase and a patch.
> 
> BTW, I was thinking of not doing the optimization anyway on volatile
> pointers.  What do you think?

Indeed not.  And with -fnon-call-exceptions we can recover from null
pointer traps; I don't know what would happen in this case.

Andrew.
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