[llvm-commits] [PATCH] Bug in APCS

[Eric Christopher]

On Oct 12, 2010, at 1:55 PM, Chris Lattner wrote:

> 
> On Oct 12, 2010, at 1:51 PM, Eric Christopher wrote:
> 
>>>> Sure, but what do you think should happen with the return value? Seems like whatever generated the arg passing in the first place should have done the right thing?
>>> 
>>> I'm not sure what you mean.  The code generator shouldn't crash on IR that returns a <3 x double>.  Codegen should do something sensible even though it isn't constrained to match a specific ABI.
>> 
>> Sure, I'd prefer it raise an error if it's a type that it can't handle conformantly rather than generate code that's unexpected.
> 
> What frontend/language are you assuming?  Not all frontends have types that are defined by the ABI.  The code generator should still do something useful with them.

:)

Custom/New ABI then?  This seems pretty clearly not what the ABI says for an object of > 128-bits.  What do we do for other such things in X86 4xfloat or something?

-eric