<html>
<head>
<base href="https://bugs.llvm.org/">
</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 - JumpThread/PRE of assumes with partially available conditions"
href="https://bugs.llvm.org/show_bug.cgi?id=43182">43182</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>JumpThread/PRE of assumes with partially available conditions
</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>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</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>listmail@philipreames.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>define void @test(i1 %cnd, i32* %p, i32 %v) {
br i1 %cnd, label %taken, label %.merge_crit_edge
.merge_crit_edge: ; preds = %0
%load.pre = load i32, i32* %p, align 4
br label %merge
taken: ; preds = %0
store i32 %v, i32* %p, align 4
br label %merge
merge: ; preds = %.merge_crit_edge,
%taken
%load = phi i32 [ %load.pre, %.merge_crit_edge ], [ %v, %taken ]
%c = icmp eq i32 %load, %v
tail call void @llvm.assume(i1 %c)
ret void
}
declare void @llvm.assume(i1)
The assume should be sunk into the .merge_crit_edge as the fact is trivially
known to be true along the taken path.</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>