Re: Help restricting args of an intrinsic function

[Syd Polk <spolk at apple dot com>]

On Jan 30, 2004, at 4:54 PM, Diego Novillo wrote:

> On Fri, 2004-01-30 at 19:46, Syd Polk wrote:
>
> > How can I safely:
> > 	- Determine if a value is really a compile-time constant?
> > 	- Get the value of that constant?
> If you could wait a little while until tree-ssa is merged in mainline,
> this would be relatively simple to implement inside the tree 
> optimizers.
>
> So, if the compiler cannot assert that the arguments are compile-time
> constants, you want to emit an error?

Not only that, but compile-time constants in a certain range.

__builtin_prefetch does something similar, but only supports actual 
integers in the source code; it has the same characteristics as my 
original implementation.

> Diego.
Syd Polk
Apple Computer
Technology EPM, Mac OS X Development Tools
+1 408 974-0577