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va_start only takes on argument now.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6039 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2003-05-08 15:55:44 +00:00
parent 27aa094f57
commit a1a2097919
1 changed files with 8 additions and 10 deletions
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docs/LangRef.html
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@ -1697,7 +1697,7 @@ int %test(int %X, ...) {
%aq = alloca sbyte*
; Initialize variable argument processing
call void (sbyte**, ...)* %<a href="#i_va_start">llvm.va_start</a>(sbyte** %ap, int %X)
call void (sbyte**)* %<a href="#i_va_start">llvm.va_start</a>(sbyte** %ap)
; Read a single integer argument
%tmp = <a href="#i_va_arg">va_arg</a> sbyte** %ap, int
@ -1718,7 +1718,7 @@ int %test(int %X, ...) {
<h5>Syntax:</h5>
<pre>
call void (va_list*, ...)* %llvm.va_start(&lt;va_list&gt;* &lt;arglist&gt;, &lt;argument&gt;)
call void (va_list*)* %llvm.va_start(&lt;va_list&gt;* &lt;arglist&gt;)
</pre>
<h5>Overview:</h5>
@ -1730,18 +1730,16 @@ invoked.<p>
<h5>Arguments:</h5>
The first argument is a pointer to a <tt>va_list</tt> element to initialize.
The second argument is required to be the last LLVM argument before the
ellipsis. In the future, this restriction may be relaxed (to allow it to be
other arguments).<p>
The argument is a pointer to a <tt>va_list</tt> element to initialize.<p>
<h5>Semantics:</h5>
The '<tt>llvm.va_start</tt>' intrinsic works just like the <tt>va_start</tt>
macro available in C. In a target-dependent way, it initializes the
<tt>va_list</tt> element the first argument points to, so that the next call to
<tt>va_arg</tt> will produce the first variable argument passed to the
function.<p>
<tt>va_list</tt> element the argument points to, so that the next call to
<tt>va_arg</tt> will produce the first variable argument passed to the function.
Unlike the C <tt>va_start</tt> macro, this intrinsic does not need to know the
last argument of the function, the compiler can figure that out.<p>
<!-- _______________________________________________________________________ -->
@ -1812,7 +1810,7 @@ arbitrarily complex and require memory allocation, for example.<p>
<address><a href="mailto:sabre@nondot.org">Chris Lattner</a></address>
<!-- Created: Tue Jan 23 15:19:28 CST 2001 -->
<!-- hhmts start -->
Last modified: Thu May 8 00:06:36 CDT 2003
Last modified: Thu May 8 10:48:46 CDT 2003
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</font>
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