<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">At a first glance I see nothing obviously wrong with the assembly, but it is a big file. So if you have a specific part in mind, please copy into the E-Mail discussion.<div class=""><br class=""></div><div class=""><div>I assume you are compiling for a mac or linux system? In that case none of the xmm registers are callee saved (as you already explained) so the register allocator has to spill them if they are alive across a call. So I don't see proof yet that using xmm10-xmm15 would have helped in this function...</div><div><br class=""></div><div>- Matthias</div><div><br class=""><blockquote type="cite" class=""><div class="">On Oct 30, 2018, at 12:24 AM, Dangeti Tharun kumar 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 dir="ltr" style="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;" class="">Hi Craig,<div class=""><br class=""></div><div class="">The test case is from spec-17.</div><div class=""><br class=""></div><div class=""><div class=""><div class="">The attached is the assembly file for the function MeanShiftImage from spec17/538.imagick_r/src/magick/feature.c.<div class="">As I was saying, registers XMM10-15 are not used.</div></div></div><div class=""><br class=""></div></div></div><br style="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;" class=""><div class="gmail_quote" style="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 dir="ltr" class="">On Thu, Oct 25, 2018 at 2:16 PM Dangeti Tharun kumar <<a href="mailto:cs15mtech11002@iith.ac.in" class="">cs15mtech11002@iith.ac.in</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class=""><div class="">Hi,</div><div class=""><br class=""></div><div dir="ltr" class="">It can be reproduced with the following command:<div class=""><pre style="white-space: pre-wrap;" class="">clang -S -I spec17/benchspec/CPU/538.imagick_r/src/ -O3 -mavx spec17/benchspec/CPU/538.imagick_r/src/magick/feature.c -DMAGICKCORE_HDRI_ENABLE</pre><pre style="white-space: pre-wrap;" class=""><font class=""><font face="arial, helvetica, sans-serif" class="">I don't see any register above <b class="">xmm9</b> been used in any function.</font></font></pre></div></div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="">On Thu, Oct 25, 2018 at 10:44 AM Craig Topper <<a href="mailto:craig.topper@gmail.com" target="_blank" class="">craig.topper@gmail.com</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class="">Can you provide an example?<div class=""><br clear="all" class=""><div class=""><div dir="ltr" class="m_-6381692223217005043m_421471599995058675gmail_signature" data-smartmail="gmail_signature">~Craig</div></div><br class=""></div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="">On Wed, Oct 24, 2018 at 9:52 PM Dangeti Tharun kumar via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank" class="">llvm-dev@lists.llvm.org</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class="">Hi,<div class=""><br class=""></div><div class="">I see that, in Greedy register allocation not all the XMM registers are used(even there is a need) if there is a function call crossing the live range.</div><div class="">There are spills which can be avoided just by using them.</div><div class=""><br class=""></div><div class="">The reason I see is the CCC declares XMMs are not callee saved. This means they are caller saved, correct me if I am wrong.</div><div class="">Is the greedy RA intentionally not using XMMs in order to avoid saving and restoring regs at call site?</div><div class=""><br class=""></div><div class=""><div class=""><br class=""></div>--<span class="Apple-converted-space"> </span><br class=""><div dir="ltr" class="m_-6381692223217005043m_421471599995058675m_8164118419566646360gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div class="">Regards,</div><div class="">DTharun</div></div></div></div></div></div></div></div></div></div>_______________________________________________<br class="">LLVM Developers mailing list<br class=""><a href="mailto:llvm-dev@lists.llvm.org" target="_blank" class="">llvm-dev@lists.llvm.org</a><br class=""><a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev" rel="noreferrer" target="_blank" class="">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a><br class=""></blockquote></div></blockquote></div><br clear="all" class=""><div class=""><br class=""></div>--<span class="Apple-converted-space"> </span><br class=""><div dir="ltr" class="m_-6381692223217005043gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div class="">Regards,</div><div class="">DTharun</div></div></div></div></div></div></div></div></blockquote></div><br clear="all" style="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;" class=""><div style="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;" class=""><br class=""></div><span style="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; float: none; display: inline !important;" class="">--<span class="Apple-converted-space"> </span></span><br style="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;" class=""><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature" style="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 dir="ltr" class=""><div class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div class="">Regards,</div><div class="">DTharun</div></div></div></div></div></div></div></div><span id="cid:f_jnvdt7l90"><meanshift.s></span><span style="caret-color: rgb(0, 0, 0); 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