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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">It sounds like you want to compile with LTO (-flto) after removing the 'inline' from 'foo'. That should enable the cross-compilation-unit inlining you want.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">--paulr<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></a></p>
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<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""> llvm-dev [mailto:llvm-dev-bounces@lists.llvm.org]
<b>On Behalf Of </b>Soham Sinha via llvm-dev<br>
<b>Sent:</b> Tuesday, May 15, 2018 7:33 PM<br>
<b>To:</b> via llvm-dev<br>
<b>Subject:</b> [llvm-dev] How to inline function from other file in IR<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">Hello,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">How can I inline a function mentioned in other file?<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 an inline function <i>foo</i> in C source file (a.c) which is not referenced in this file. I compile this file to a.ll (I notice that the compiled a.ll doesn't have
<i>foo</i>'s definition, probably because it was inlined but not called anywhere)<o:p></o:p></p>
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<p class="MsoNormal">I have another C source file b.c with function <i>bar</i>; I compile this to b.ll<o:p></o:p></p>
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<p class="MsoNormal">I link these two files with llvm-link<o:p></o:p></p>
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<p class="MsoNormal">I have written a pass which inserts <i>foo </i>function calls to the bar function at some points. I want foo function calls to be
<i>inlined</i>. However, I get compilation error because <i>foo </i>is not found (a.ll doesn't have foo)<o:p></o:p></p>
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<p class="MsoNormal">If I remove the inline attribute of foo in a.c, I get the correctly compilation, with calls to foo inserted in bar from b.c<o:p></o:p></p>
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<p class="MsoNormal">How do I achieve this kind of inline-ing?<o:p></o:p></p>
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<o:p></o:p></p>
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<p class="MsoNormal">Regards,<o:p></o:p></p>
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<p class="MsoNormal">Soham Sinha<o:p></o:p></p>
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<p class="MsoNormal">PhD Student, Department of Computer Science<o:p></o:p></p>
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<p class="MsoNormal">Boston University<o:p></o:p></p>
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