<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Mar 26, 2018, at 00:41, Bakhvalov, Denis via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><a name="_MailEndCompose" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">><span class="Apple-converted-space"> </span></span></a><span lang="EN-US" class="">I'm trying to understand how the non-LTO case is supposed to work<br class="">non-LTO case works because when linker starts it’s job all the llvm intrinsics are already lowered.</span></div></div></div></blockquote><div><br class=""></div><div>Yup, this has been a long-time problem for LTO. The right answer is for LTO to determine a fairly tight superset of the symbols that will be used after lowering, and request them from the linker (i.e., add them to the reported symbol table as undefined). This isn't particularly easy to do and there are workarounds, so no one has prioritized it.</div><br class=""><blockquote type="cite" class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><br class=""></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" class="">> Right, which is why I am suggesting that it might be appropriate to build with -fno-builtin (or -fno-builtin-exp) here –<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" class="">> this solves the LTO issue as there will no longer be an llvm intrinsic in the bitcode<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" class="">Yes, I just tested it and -fno-builtin helps in this case. I added definition of __exp_finite to libexp.a and now it was resolved from libexp.a (because no llvm intrinsics).</span><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Best regards,<br class="">Denis Bakhvalov.<o:p class=""></o:p></span></div></div><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">---------------------------------------------------------------------<br class=""><strong style="line-height: 11.25pt;" class=""><span style="font-size: 9pt; color: rgb(89, 89, 89);" class=""><span style="font-family: "Arial Narrow", sans-serif;" class="">Intel Technology Poland sp. z o.o.<br class=""></span></span></strong><span style="color: rgb(89, 89, 89); font-family: "Arial Narrow", sans-serif; font-size: 9pt; line-height: 11.25pt;" class="">ul. 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