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<p class="MsoNormal"><span lang="EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am wondering why the constant propagation pass for
</span><a href="http://paste.ofcode.org/6upqApjEAy5WYjnFgjQxvj"><span lang="EN-US">http://paste.ofcode.org/6upqApjEAy5WYjnFgjQxvj</span></a><span lang="EN-US"> does not propagate the 4660 integer (line 57 after optim).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If I understand correctly, the lines:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">store i64 4660, i64* %I<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">[…]<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">%Ldq = load i64* %I<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">[…]<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">store i64 %Ldq, i64* @rbp<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">May be transformed to :<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">store i64 4660, i64* @rbp<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">But I am unable to find the correct passes to apply. I found some related post on the mailing list (<a href="http://lists.cs.uiuc.edu/pipermail/llvmdev/2005-January/003232.html">http://lists.cs.uiuc.edu/pipermail/llvmdev/2005-January/003232.html</a>)
but both gcse and load-vn have disappeared into the latest LLVM. I tried to analyze the alias analysis with -count-aa, but I have no idea how to use it to debug my problem.<o:p></o:p></span></p>
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