<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 - Merge 0cecafd647cc into 10.0.1"
href="https://bugs.llvm.org/show_bug.cgi?id=46331">46331</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Merge 0cecafd647cc into 10.0.1
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>10.0
</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>release blocker
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dimitry@andric.com
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Please merge <a href="https://reviews.llvm.org/rG0cecafd647cc">https://reviews.llvm.org/rG0cecafd647cc</a> into 10.0.1. As described
in <a href="https://bugs.freebsd.org/246630">https://bugs.freebsd.org/246630</a>, clang's new -fintegrated-cc1 default
(introduced in <a href="https://reviews.llvm.org/rGc4a134a5107c">https://reviews.llvm.org/rGc4a134a5107c</a> and some follow-up
commits) appears to have uncovered non-determinism in the assembly output. This
is further described in <a href="https://reviews.llvm.org/D69825">https://reviews.llvm.org/D69825</a>, the original review
for
<a href="https://reviews.llvm.org/rGc4a134a5107c">https://reviews.llvm.org/rGc4a134a5107c</a>.
In FreeBSD I have worked around the problem temporarily, by setting
CLANG_SPAWN_CC1 back to 1, so a fresh clang -cc1 process is executed.
But after some more testing and bisecting, I found out that the non-determinism
is actually fixed by <a href="https://reviews.llvm.org/rG0cecafd647cc">https://reviews.llvm.org/rG0cecafd647cc</a> ("[BasicAA] Make
BasicAA a cfg pass"). In <a href="https://reviews.llvm.org/D69825#2091632">https://reviews.llvm.org/D69825#2091632</a> I've asked
@asbirlea if this was an intended side-effect of the commit, or if there is
something different going on.
In any case, this bug should be solved one way or another in 10.0.1, as
non-determinism is obviously a blocker.</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>