<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Sep 29, 2008, at 9:10 AM, Villmow, Micah wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div lang="EN-US" link="blue" vlink="blue" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><o:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"><o:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="Street"><o:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="address"><o:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"><o:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"><div class="Section1"><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; "><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy; ">One of the requirements for the backend that I am targeting is certain meta-data needs to be returned to the runtime. This includes the mapping between parameters and the locations this data is expected to be stored at. This is mainly because there are multiple address spaces and each one is mapped differently but all are assigned registers from the same register class. So this mapping needs to be known at compile time and passed in the generated code to the runtime to be processed before execution.</span></font></div></div></o:smarttagtype></o:smarttagtype></o:smarttagtype></o:smarttagtype></o:smarttagtype></div></span></blockquote><div><br></div></div><div>The typical solution to this is to have a one "load" instruction for each address space. The load for address space #17 knows that it is for that addr space. Instruction selection handles its generation, and the asmprinter hook can print whatever metadata you want.</div><div><br></div><div>-Chris </div></body></html>