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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal">I’d like to clarify the behavior of LLVM in presence of inline-related attribute annotation on both declaration and the function call, specifically if it differs.<o:p></o:p></p>
<p class="MsoNormal">Currently, it looks like LLVM would always inline the function if it sees ‘alwaysinline’ attribute on either the call or the declaration, ignoring the ‘noinline’:<o:p></o:p></p>
<p class="MsoNormal"><a href="https://godbolt.org/z/r4e837dj5">https://godbolt.org/z/r4e837dj5</a><o:p></o:p></p>
<p class="MsoNormal"><a href="https://godbolt.org/z/4xnoKz978">https://godbolt.org/z/4xnoKz978</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However, this seems purely accidental (related to how hasFnAttr works), so I wonder if the IR such as in above cases is considered correct.<o:p></o:p></p>
<p class="MsoNormal">I can see it being useful for something like <a href="https://lists.llvm.org/pipermail/cfe-dev/2018-September/059232.html">
https://lists.llvm.org/pipermail/cfe-dev/2018-September/059232.html</a> , but at the moment the inliner behavior appears inconsistent.<o:p></o:p></p>
<p class="MsoNormal">So, what are the IR guarantees regarding the (no|always)inline attributes? If the programs linked above are incorrect, should there be a verifier check to guard against such IR?<o:p></o:p></p>
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