<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><br><div><div>On May 23, 2013, at 3:40 PM, Andrew Trick <<a href="mailto:atrick@apple.com">atrick@apple.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">On May 21, 2013, at 3:58 PM, Chris Lattner <<a href="mailto:clattner@apple.com">clattner@apple.com</a>> wrote:<div><blockquote type="cite"><div style="letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">On May 21, 2013, at 11:43 AM, "Guo, Xiaoyi" <<a href="mailto:Xiaoyi.Guo@amd.com">Xiaoyi.Guo@amd.com</a>> wrote:<br><br><blockquote type="cite">Hi Tom,<br><br>Here's the email thread where I explained my motivation and responses from other people.<br><a href="http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-April/061728.html">http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-April/061728.html</a><br></blockquote><br>I'm not thrilled about making SDNode larger. Have you quantified the memory impact of this change?<br></div></blockquote></div><br><div><div>The IROrder field fits in padding just before debugLoc. I verified that the bumpPtrAllocator stats don't change when the field is placed optimally.</div></div></div></blockquote><div><br></div>Ok.</div><div><br><blockquote type="cite"><div style="letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div><div>Incidentally, we already allocate 256 bytes for every SDNode! That's huge compared to IR values and MI instructions. Most of that space is unused for common SDNode types.</div></div></div></blockquote><div><br></div>That is crazy!</div><div><br></div><div>-Chris</div><div><br></div></body></html>