[llvm-commits] CVS: llvm/docs/LangRef.html

[Chris Lattner]

> Document 'inreg' & 'sret'

Nice.

> @@ -743,14 +730,15 @@
>      <dt><tt>sext</tt></dt>
>      <dd>This indicates that the parameter should be sign extended  
> just before
>      a call to this function.</dd>
> +    <dt><tt>inreg</tt></dt>
> +    <dd>This indicates that the parameter should be placed in  
> register (if
> +    possible) during assembling function call. It's currently  
> supported in x86
> +    backend only.</dd>

Please say "Support for this attribute is target-specific." instead  
of saying that only the x86 backend implements it.  I'd prefer to  
keep 'current status' out of LangRef.html.

> +    <dt><tt>sret</tt></dt>
> +    <dd>This indicates, that the parameter is special hidden  
> pointer to struct
> +    to return.

Grammar, I suggest: "This indicates that the parameter specifies the  
address of a structure that is the return value of the function in  
the source program."

Thanks Anton!

-Chris

> Usually such parameter needs special handling during codegen.</dd>
>    </dl>
>
> -  <p>The current motivation for parameter attributes is to enable  
> the sign and
> -  zero extend information necessary for the C calling convention  
> to be passed
> -  from the front end to LLVM. The <tt>zext</tt> and <tt>sext</tt>  
> attributes
> -  are used by the code generator to perform the required  
> extension. However,
> -  parameter attributes are an orthogonal feature to calling  
> conventions and
> -  may be used for other purposes in the future.</p>
>  </div>
>
>  <!--  
> ====================================================================== 
> = -->
> @@ -4519,7 +4507,7 @@
>
>    <a href="mailto:sabre at nondot.org">Chris Lattner</a><br>
>    <a href="http://llvm.org">The LLVM Compiler Infrastructure</a><br>
> -  Last modified: $Date: 2007/01/23 12:35:46 $
> +  Last modified: $Date: 2007/01/28 14:30:45 $
>  </address>
>  </body>
>  </html>
>
>
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