<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Mar 23, 2012, at 10:33 AM, Lang Hames wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Optima; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-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: 0px; font-size: medium; "><span class="Apple-style-span" style="font-family: monospace; ">+ // Record any overlaps with regmask operands.<br>+ BitVector regMaskOverlaps(tri->getNumRegs());<br>+ for (ArrayRef<SlotIndex>::iterator rmItr = regMaskSlots.begin(),<br>+ rmEnd = regMaskSlots.end();<br>+ rmItr != rmEnd; ++rmItr) {<br>+ SlotIndex rmIdx = *rmItr;<br>+ if (vregLI->liveAt(rmIdx)) {<br>+ MachineInstr *rmMI = lis->getInstructionFromIndex(rmIdx);<br>+ const uint32_t* regMask = 0;<br>+ for (MachineInstr::mop_iterator mopItr = rmMI->operands_begin(),<br>+ mopEnd = rmMI->operands_end();<br>+ mopItr != mopEnd; ++mopItr) {<br>+ if (mopItr->isRegMask()) {<br>+ regMask = mopItr->getRegMask();<br>+ break;<br>+ }<br>+ }<br>+ assert(regMask != 0 && "Couldn't find register mask.");<br>+ regMaskOverlaps.setBitsNotInMask(regMask);<br> }<br>+ }<br></span></span></blockquote><div><br></div><div>LiveIntervals::checkRegMaskInterference() already does this.</div><div><br></div><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Optima; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-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: 0px; font-size: medium; "><span class="Apple-style-span" style="font-family: monospace; ">+ for (unsigned preg = 0; preg < tri->getNumRegs(); ++preg) {<br>+ if (regMaskOverlaps.test(preg))<br>+ overlappingPRegs.insert(preg);<br>+ }<br></span></span></blockquote><div><br></div><div>You can use BitVector::find_first / find_next here.</div><div><br></div><div>/jakob</div><div><br></div></div></body></html>