[PR 79905] ICE with vector_type

[Bill Schmidt]

> On Apr 6, 2017, at 9:26 AM, Bill Schmidt <wschmidt@linux.vnet.ibm.com> wrote:
> 
> 
>> On Apr 6, 2017, at 9:19 AM, Bill Schmidt <wschmidt@linux.vnet.ibm.com> wrote:
>> 
>> 
>>> On Apr 6, 2017, at 9:04 AM, Richard Biener <richard.guenther@gmail.com> wrote:
>>> 
>>> On Thu, Apr 6, 2017 at 1:28 PM, Nathan Sidwell <nathan@acm.org> wrote:
>>>> Let's try this one then.
>> 
>> Nathan's patch regstraps cleanly.  I'll try Richard's variant (dropping the if test below) now.

As expected, this version passes regstrap as well.

Bill
> 
> FYI, the test case should also include:
> 
> // { dg-require-effective-target powerpc_altivec_ok } 
> 
> to avoid problems on targets without AltiVec support.
> 
> Bill
>> 
>> Bill
>>> 
>>> I'd call this
>>> 
>>> +  if (result == TYPE_CANONICAL (result))
>>> +    /* Copy so we don't give the canonical type a name.  */
>>> +    result = build_variant_type_copy (result);
>>> 
>>> premature optimization -- I wonder if anything breaks if you always copy?
>>> (that is, I expect result is always the canonical type here?)
>>> 
>>> Richard.
>>> 
>>>> nathan
>>>> 
>>>> --
>>>> Nathan Sidwell
>>> 
>> 
>