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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I think you may add restrict type qualifier.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Sam<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> llvmdev-bounces@cs.uiuc.edu [mailto:llvmdev-bounces@cs.uiuc.edu]
<b>On Behalf Of </b>Welson Sun<br>
<b>Sent:</b> Friday, September 21, 2012 5:50 PM<br>
<b>To:</b> Krzysztof Parzyszek<br>
<b>Cc:</b> llvmdev@cs.uiuc.edu<br>
<b>Subject:</b> Re: [LLVMdev] Alias Analysis accuracy<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Yeah. Is there a way to specify noalias between these arguments?<o:p></o:p></p>
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<p class="MsoNormal">On Fri, Sep 21, 2012 at 2:46 PM, Krzysztof Parzyszek <<a href="mailto:kparzysz@codeaurora.org" target="_blank">kparzysz@codeaurora.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">On 9/21/2012 4:35 PM, Welson Sun wrote:<o:p></o:p></p>
<p class="MsoNormal">Dear LLVM,<br>
<br>
I would like to understand how to improve the LLVM alias analysis<br>
accuracy. I am currently using llvmgcc 2.9 and llvm 3.0. Here is the C code:<br>
<br>
void foo(int a[SIZE], int b[SIZE], int c[SIZE])<br>
{<br>
for(int i=0; i<SIZE; i++)<br>
c[i] = a[i] + b[i];<br>
}<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">This is equivalent to<br>
void foo(int *a, int *b, int *c)<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
{<br>
for(int i=0; i<SIZE; i++)<br>
c[i] = a[i] + b[i];<br>
}<o:p></o:p></p>
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<p class="MsoNormal">and so you can call this function with the same array for all parameters.<span style="color:#888888"><br>
<br>
<span class="hoenzb">-K</span><br>
<br>
<span class="hoenzb">-- </span><br>
<span class="hoenzb">Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation</span><br>
<span class="hoenzb">_______________________________________________</span><br>
<span class="hoenzb">LLVM Developers mailing list</span><br>
<span class="hoenzb"><a href="mailto:LLVMdev@cs.uiuc.edu" target="_blank">LLVMdev@cs.uiuc.edu</a>
<a href="http://llvm.cs.uiuc.edu" target="_blank">http://llvm.cs.uiuc.edu</a></span><br>
<span class="hoenzb"><a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev" target="_blank">http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev</a></span></span><o:p></o:p></p>
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<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">-- <br>
Welson<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Phone: (408) 418-8385<o:p></o:p></p>
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<p class="MsoNormal">Email: <a href="mailto:welson.sun@gmail.com" target="_blank">welson.sun@gmail.com</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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