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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Good! I submitted </span>
<a href="https://bugs.llvm.org/show_bug.cgi?id=42392"><span style="font-family:"Verdana",sans-serif;color:#663366;background:white">42392</span></a><span lang="EN-US" style="color:#1F497D">.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Slava<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="color:#1F497D"><o:p> </o:p></span></a></p>
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<p class="MsoNormal"><a name="_____replyseparator"></a><b><span lang="EN-US" style="color:windowtext;mso-fareast-language:RU">From:</span></b><span lang="EN-US" style="color:windowtext;mso-fareast-language:RU"> Finkel, Hal J. [mailto:hfinkel@anl.gov]
<br>
<b>Sent:</b> Tuesday, June 25, 2019 2:00 PM<br>
<b>To:</b> Zakharin, Vyacheslav P <vyacheslav.p.zakharin@intel.com>; cfe-dev@lists.llvm.org<br>
<b>Subject:</b> Re: [cfe-dev] missing -Wuninitialized warnings with OpenMP<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p><o:p> </o:p></p>
<div>
<p class="MsoNormal">On 6/24/19 3:27 PM, Zakharin, Vyacheslav P via cfe-dev wrote:<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span lang="EN-US">Hello,</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Is it possible to get appropriate -Wuninitialized warnings with OpenMP for the following cases?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">int reduction(int *input) {</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> int i, r;</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">#pragma omp target parallel for map(to: input) reduction(+: r)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> for (i = 0; i < 100; ++i)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> r += input[i];</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> return r;</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">}</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">int linear() {</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> int i, r;</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">#pragma omp target parallel for linear(r)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> for (i = 0; i < 100; ++i)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> r += 1;</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> return r;</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">}</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">void firstprivate(int *input) {</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> int r;</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">#pragma omp target firstprivate(r) map(tofrom: input[0:1])</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> *input = r;</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">}</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">It compiles silently with -fopenmp, but the errors become obvious w/o it:</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">warn.c:5:5: warning: variable 'r' is uninitialized when used here [-Wuninitialized]</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">warn.c:14:5: warning: variable 'r' is uninitialized when used here [-Wuninitialized]</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">warn.c:21:12: warning: variable 'r' is uninitialized when used here [-Wuninitialized]</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Is it worth a tracker?</span><o:p></o:p></p>
</blockquote>
<p><o:p> </o:p></p>
<p>Yes, I think that filing a bug would be useful.<o:p></o:p></p>
<p>Thanks again,<o:p></o:p></p>
<p>Hal<o:p></o:p></p>
<p><o:p> </o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Thanks,</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Slava</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:RU"><br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>cfe-dev mailing list<o:p></o:p></pre>
<pre><a href="mailto:cfe-dev@lists.llvm.org">cfe-dev@lists.llvm.org</a><o:p></o:p></pre>
<pre><a href="https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev">https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev</a><o:p></o:p></pre>
</blockquote>
<pre>-- <o:p></o:p></pre>
<pre>Hal Finkel<o:p></o:p></pre>
<pre>Lead, Compiler Technology and Programming Languages<o:p></o:p></pre>
<pre>Leadership Computing Facility<o:p></o:p></pre>
<pre>Argonne National Laboratory<o:p></o:p></pre>
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