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<p>Hi, Elena,</p>
<p>You're correct. We do assume that pointers in different address
spaces can alias.</p>
<p>Targets can add their own AA pass into the AA query chain, and
one of the things such analysis passes can do account for
target-specific knowledge of address-space semantics. For example,
see lib/Target/AMDGPU/AMDGPUAliasAnalysis.cpp</p>
<p> -Hal<br>
</p>
<br>
<div class="moz-cite-prefix">On 04/26/2018 07:56 AM, Demikhovsky,
Elena via llvm-dev wrote:<br>
</div>
<blockquote type="cite"
cite="mid:A0DC88CEB3010344830D52D66533DA8E82CAE415@hasmsx108.ger.corp.intel.com">
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<font size="2" face="Calibri"><span style="font-size:11pt;">
<div style="text-indent:-17.85pt;padding-left:46.2pt;">Hi,</div>
<div> </div>
<div style="text-indent:-17.85pt;padding-left:46.2pt;">Can I
configure address spaces aliasing for my specific target?</div>
<div style="text-indent:-17.85pt;padding-left:46.2pt;">I found
this discussion (<a
href="https://groups.google.com/forum/#%21topic/llvm-dev/0ZbzzN6t05o"
moz-do-not-send="true"><font color="#0563C1"><u>https://groups.google.com/forum/#!topic/llvm-dev/0ZbzzN6t05o</u></font></a>)
, where
James says “<font color="#222222" size="2" face="Arial"><span
style="font-size:10pt;">pointers in different address
spaces cannot alia</span></font><font color="#222222"
size="2" face="Arial"><span style="font-size:10pt;">s</span></font><font
color="#222222" size="2" face="Arial"><span
style="font-size:10pt;">”,</span></font></div>
<div style="text-indent:-17.85pt;padding-left:46.2pt;">but it
is not what I see in the code.</div>
<div style="text-indent:-17.85pt;padding-left:46.2pt;">I
looked for a way to customize address spaces separation in
Target, but I can’t find.</div>
<div style="text-indent:-17.85pt;padding-left:46.2pt;">Any
thoughts?</div>
<div style="text-indent:-17.85pt;padding-left:46.2pt;">Thanks.</div>
<div style="text-indent:-17.85pt;padding-left:46.2pt;"> </div>
<ul style="margin:0;padding-left:36pt;">
<font color="#2F5496" size="3" face="Times New Roman"><span
style="font-size:12pt;">
<li><b><i> Elena</i></b></li>
</span></font>
</ul>
<div> </div>
<div style="text-indent:-17.85pt;padding-left:46.2pt;"> </div>
<div style="text-indent:-17.85pt;padding-left:46.2pt;"> </div>
</span></font>
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<br>
<pre class="moz-signature" cols="72">--
Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory</pre>
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