Fix PR15293: ARM codegen ice - expected larger existing stack allocation

[Manman Ren]

byval is enabled for struct size > 64 bytes.

Manman

On Mar 28, 2013, at 10:49 AM, Renato Golin wrote:

> On 28 March 2013 17:34, Bob Wilson <bob.wilson at apple.com> wrote:
> Manman reenabled struct byval for ARM in clang svn r161790.  I'm not aware of any problems with it now.
> 
> Hi Bob,
> 
> That's weird, I just compiled a simple example and got the array cast, have you seen the attachments earlier? Even when I change the structure to fit in the first four registers, the code lowered is similar and the IR coalesce to an array.
> 
> cheers,
> --renato
> 
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