6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-18 12:29:27 +00:00
Code Issues Projects Releases Wiki Activity

Add llvm.stacksave and llvm.stackrestore.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25264 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-01-13 02:03:13 +00:00
parent e08c270623
commit 57e1f39713
1 changed files with 68 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

68
docs/LangRef.html
View File

@ -127,6 +127,8 @@
<ol>
<li><a href="#i_returnaddress">'<tt>llvm.returnaddress</tt>' Intrinsic</a></li>
<li><a href="#i_frameaddress">'<tt>llvm.frameaddress</tt>' Intrinsic</a></li>
<li><a href="#i_stacksave">'<tt>llvm.stacksave</tt>' Intrinsic</a></li>
<li><a href="#i_stackrestore">'<tt>llvm.stackrestore</tt>' Intrinsic</a></li>
<li><a href="#i_prefetch">'<tt>llvm.prefetch</tt>' Intrinsic</a></li>
<li><a href="#i_pcmarker">'<tt>llvm.pcmarker</tt>' Intrinsic</a></li>
<li><a href="#i_readcyclecounter"><tt>llvm.readcyclecounter</tt>' Intrinsic</a></li>
@ -2787,6 +2789,72 @@ source-language caller.
</p>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsubsection">
<a name="i_stacksave">'<tt>llvm.stacksave</tt>' Intrinsic</a>
</div>
<div class="doc_text">
<h5>Syntax:</h5>
<pre>
declare sbyte *%llvm.stacksave()
</pre>
<h5>Overview:</h5>
<p>
The '<tt>llvm.stacksave</tt>' intrinsic is used to remember the current state of
the function stack, for use with <a href="#i_stackrestore">
<tt>llvm.stackrestore</tt></a>. This is useful for implementing language
features like scoped automatic variable sized arrays in C99.
</p>
<h5>Semantics:</h5>
<p>
This intrinsic returns a opaque pointer value that can be passed to <a
href="#i_stackrestore"><tt>llvm.stackrestore</tt></a>. When an
<tt>llvm.stackrestore</tt> intrinsic is executed with a value saved from
<tt>llvm.stacksave</tt>, it effectively restores the state of the stack to the
state it was in when the <tt>llvm.stacksave</tt> intrinsic executed. In
practice, this pops any <a href="#i_alloca">alloca</a> blocks from the stack
that were allocated after the <tt>llvm.stacksave</tt> was executed.
</p>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsubsection">
<a name="i_stackrestore">'<tt>llvm.stackrestore</tt>' Intrinsic</a>
</div>
<div class="doc_text">
<h5>Syntax:</h5>
<pre>
declare void %llvm.stackrestore(sbyte* %ptr)
</pre>
<h5>Overview:</h5>
<p>
The '<tt>llvm.stackrestore</tt>' intrinsic is used to restore the state of
the function stack to the state it was in when the corresponding <a
href="#llvm.stacksave"><tt>llvm.stacksave</tt></a> intrinsic executed. This is
useful for implementing language features like scoped automatic variable sized
arrays in C99.
</p>
<h5>Semantics:</h5>
<p>
See the description for <a href="#i_stacksave"><tt>llvm.stacksave</tt></a>.
</p>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsubsection">
<a name="i_prefetch">'<tt>llvm.prefetch</tt>' Intrinsic</a>