<html>
<head>
<base href="http://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 --- - [thumbv8] insts that sets CPSR are bundled into IT block mistakenly"
href="http://llvm.org/bugs/show_bug.cgi?id=18370">18370</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[thumbv8] insts that sets CPSR are bundled into IT block mistakenly
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</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>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>weimingz@codeaurora.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=11812" name="attach_11812" title="test case">attachment 11812</a> <a href="attachment.cgi?id=11812&action=edit" title="test case">[details]</a></span>
test case
llc < test.ll
emits:
foo:
@ BB#0: @ %entry
mov r1, r0
movs r0, #11
cmp r1, #0
it ne
mulsne r0, r1, r0 ===> incorrrect: it can't set CPSR inside IT
bx lr
Reason:
Thumbv8 requires running Thumb2SizeReduction pass before IfConv to
convert wide 32-bit Thumb2 insts to 16-bit narrow insts becuase wide
insts are not eligible for IT blocks. However, Thumb2SizeReduction may
also set CPSR for converted instrs (e.g. mul -> muls). However, such
insts should not be bundled.</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>