<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><span class="vcard"><a class="email" href="mailto:florian_hahn@apple.com" title="Florian Hahn <florian_hahn@apple.com>"> <span class="fn">Florian Hahn</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - extra memory load in loop"
href="https://bugs.llvm.org/show_bug.cgi?id=27740">bug 27740</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>florian_hahn@apple.com
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - extra memory load in loop"
href="https://bugs.llvm.org/show_bug.cgi?id=27740#c29">Comment # 29</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - extra memory load in loop"
href="https://bugs.llvm.org/show_bug.cgi?id=27740">bug 27740</a>
from <span class="vcard"><a class="email" href="mailto:florian_hahn@apple.com" title="Florian Hahn <florian_hahn@apple.com>"> <span class="fn">Florian Hahn</span></a>
</span></b>
<pre>I think this has been resolved in current trunk. BasicAA will now look through
phis and we also eliminate/forward loads across BBs.
Trunk generates <a href="https://godbolt.org/z/f4Eo3x">https://godbolt.org/z/f4Eo3x</a>
foo: # @foo
cmpwi 5, 1
bltlr 0
li 7, 8
lwz 6, 4(3)
clrldi 5, 5, 32
addi 4, 4, -16
lfs 0, 8(3)
mtctr 5
li 5, 4
.LBB0_2: # =>This Inner Loop Header: Depth=1
lwzu 8, 20(4)
lfsx 1, 4, 5
add 6, 6, 8
stw 6, 4(3)
xssubsp 0, 0, 1
stfsx 0, 3, 7
lwz 8, 8(4)
stw 8, 12(3)
bdnz .LBB0_2
blr
.long 0
.quad 0</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>