[LLVMdev] (Function) attributes documentation

Devang Patel dpatel at apple.com
Tue Oct 7 10:50:10 PDT 2008

On Oct 7, 2008, at 3:12 AM, Matthijs Kooijman wrote:

> Hi Devang,
> the improvements you made are good, I think the docs are a lot  
> clearer now. I
> stil have a few more points, though.
>>> * The section "Functions" in the LangRef has a large textual   
>>> description
>>> about how it should look, but no definition of syntax, or even a few
>>> examples of the syntax. This makes it very hard to read.
>> This description provides links for each item. Do you think we need  
>> an
>> example here?
> I would add a syntax "specification", just as with the "alias"  
> section below.
> This makes it a lot easier to look up something. In addition, it  
> would not
> hurt to include one or two actual examples as well.

I added syntax spec.
>>> * The section about the call and invoke instructions do not  
>>> mention  any
>>> attributes at all.
>> Fixed
> The description now mentions function attributes, but the syntax  
> spec doesn't.

fixed. fixed broken link also
> Additionally, the description uses "function args", whereas the  
> syntax spec uses
> "param list". I think that using "arguments" is more correct than  
> "parameters"
> for the call instruction [1], though the source (llvmParser.y) also  
> uses these
> the wrong way around AFAICS.


> This argument list is not so well specified, however. In particular,  
> it is not
> so clear if you are allowed (or required?) to specify parameter  
> attributes in
> the call instruction. From the parser and the examples I can see  
> that it is
> allowed, but I'm rather curious for the semantics here. Can they  
> override
> attributes on a declaration, or augment them, or?

This is true for ret attribute as well as function attributes. As I  
understand, it depends on the attribute itself. Each attributes doc,  
pointed by a link, should clarify this.

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