(C++) mangling vector types

[Joseph S. Myers]

On Thu, 12 Nov 2009, Daniel Jacobowitz wrote:

> On Thu, Nov 12, 2009 at 08:10:13AM -0800, Richard Henderson wrote:
> > On 11/12/2009 07:24 AM, Jason Merrill wrote:
> > >1) Leave the current mangling as is
> > >2) Leave the current mangling as is for the most common vector size on a
> > >target (SSE, Altivec) and use the new mangling for other vector sizes.
> > >3) Switch to the new mangling
> > 
> > I vote for 2.
> 
> Does anyone know of another relevant compiler?  What does it do?
> For instance, if someone can hand me a test case, I could check how
> ARM's compilers mangle it (or don't).

It seems clear to me that on ARM, generic vectors corresponding to NEON 
vector types should be mangled the same as the corresponding NEON types 
(whose mangling is specified in AAPCS), even when NEON is disabled, just 
as they follow AAPCS for argument passing and return (including when the 
VFP ABI is enabled and VFP but not NEON is supported).  (Since generic 
vectors may have other combinations of element type and size than those 
supported by NEON and listed in AAPCS, the general issue does still apply 
on ARM for such other generic types.)

-- 
Joseph S. Myers
joseph@codesourcery.com