<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="">FYI, following up on this work, I’ll soon land patches that relies on the probe mechanism being available. So, I will now make the JIT probe (MASM_PROBE) a mandatory feature in order to enable the DFG and FTL (see <a href="https://bugs.webkit.org/show_bug.cgi?id=175446" class="">https://bugs.webkit.org/show_bug.cgi?id=175446</a>). As a consequence, I’ll be disabling the DFG for the MIPS port in this patch.<div class=""><br class=""></div><div class="">Mark<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Jul 19, 2017, at 9:52 AM, Mark Lam <<a href="mailto:mark.lam@apple.com" class="">mark.lam@apple.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><br style="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;" class=""><br style="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;" class=""><blockquote type="cite" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">On Jul 19, 2017, at 9:49 AM, Konstantin Tokarev <<a href="mailto:annulen@yandex.ru" class="">annulen@yandex.ru</a>> wrote:<br class=""><br class=""><br class=""><br class="">19.07.2017, 02:49, "Mark Lam" <<a href="mailto:mark.lam@apple.com" class="">mark.lam@apple.com</a>>:<br class=""><blockquote type="cite" class="">FYI, I’m looking into making OSR exits work in a more memory efficient way using the JIT probe mechanism. Once we make this transition, the DFG and FTL will not work for any CPU targets that don’t support the JIT probe mechanism. The API to the JIT probe will probably change as well as this work progresses. I’ll take care of updating all the probe implementations for ARM and x86 variants.<br class=""><br class="">AFAICT, only CPU(MIPS) does not currently support the probe mechanism. It’s up to the MIPS folks to implement that support if they want to continue to use the DFG. Feel free to contact me if you have questions regarding the probe mechanism.<br class=""><br class="">This work will be tracked in <a href="https://bugs.webkit.org/show_bug.cgi?id=174645" class="">https://bugs.webkit.org/show_bug.cgi?id=174645</a>.<br class=""></blockquote><br class="">Could you elaborate, what code needs to be implemented for MIPS?<br class=""></blockquote><br style="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;" class=""><span style="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; float: none; display: inline !important;" class="">See everything guarded by ENABLE(MASM_PROBE) in MacroAssemblerX86Common.cpp. You’ll need to have the equivalent for MIPS. Eventually, we may need some additional changes as well, but that depends on the solution currently being investigated.</span><br style="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;" class=""><br style="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;" class=""><span style="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; float: none; display: inline !important;" class="">Mark</span><br style="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;" class=""><br style="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;" class=""><blockquote type="cite" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class=""><br class=""><blockquote type="cite" class=""><br class="">Thanks.<br class=""><br class="">Mark<br class=""><br class="">,<br class=""><br class="">_______________________________________________<br class="">webkit-dev mailing list<br class=""><a href="mailto:webkit-dev@lists.webkit.org" class="">webkit-dev@lists.webkit.org</a><br class="">https://lists.webkit.org/mailman/listinfo/webkit-dev<br class=""></blockquote><br class=""><br class="">--<span class="Apple-converted-space"> </span><br class="">Regards,<br class="">Konstantin<br class=""></blockquote><br style="font-family: Helvetica; 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