<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Spurious live variable in RewriteStatepointsForGC"
href="https://llvm.org/bugs/show_bug.cgi?id=27072">27072</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Spurious live variable in RewriteStatepointsForGC
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>sanjoy@playingwithpointers.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>declare void @f(i32 addrspace(1)*)
declare i32 addrspace(1)* @get_ref() "gc-leaf-function"="true"
define void @g() gc "statepoint-example" {
entry:
%ptr = call i32 addrspace(1)* @get_ref()
call void @f(i32 addrspace(1)* %ptr)
ret void
}
RS4GC think %ptr is live **over** the call to @f, which is too conservative.
$ ./bin/opt -rewrite-statepoints-for-gc live.ll -S -spp-print-liveset
-disable-output
Live Variables:
ptr %ptr = call i32 addrspace(1)* @get_ref()</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>