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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US">Try opt -S to get text IR instead of bitcode.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US">The second group of commands use clang -c so produce a compiled object file. For text IR you need -S -emit-llvm like in the first group.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US">Nigel<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> llvm-dev <llvm-dev-bounces@lists.llvm.org>
<b>On Behalf Of </b>Sudakshina Dutta via llvm-dev<br>
<b>Sent:</b> 14 May 2021 04:17<br>
<b>To:</b> LLVM Development List <llvm-dev@lists.llvm.org><br>
<b>Subject:</b> [llvm-dev] Auto-vectorization option<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Dear all,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Greetings. I want to generate the intermediate code (.ll file) after having LLVM auto-vectorization transformation on the source C file. I have the following code (find_max.c) on which I want to apply auto-vectorization.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">int main()<br>
{<br>
int i, n, max, arr[50];<br>
for(i = 0; i < 35; i++)<br>
{<br>
printf("arr[%d] = ", i);<br>
scanf("%d", &arr[i]);<br>
}<br>
max = arr[0];<br>
for(i = 1; i < 35; i++)<br>
{<br>
if(arr[i] > max)<br>
{<br>
max = arr[i];<br>
}<br>
}<br>
<br>
}<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I have tried the following.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<ol start="1" type="1">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1">
clang -S -emit-llvm find_max.c -o find_max.ll<o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1">
opt -loop-vectorize -force-vector-width=8 find_max.ll -o find_max_opt.ll<o:p></o:p></li></ol>
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<p class="MsoNormal">and<o:p></o:p></p>
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<ol start="1" type="1">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2">
clang -O3 -c find_max.c -Rpass=vector -Rpass-analysis=vector<o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2">
clang -O3 -c find_max.c -Rpass=vector -Rpass-analysis=vector -o find_max.ll<o:p></o:p></li></ol>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">All the above options generate binary files. I request you to please help.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks and regards,<o:p></o:p></p>
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<p class="MsoNormal">Sudakshina<o:p></o:p></p>
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