Merge pull request #10656 from oharboe/cts-deterministic-dummy-cell

cts: tie-break dummy-cell sort for deterministic output

Author: maliberty

src/cts/src/TritonCTS.cpp

@@ -2473,7 +2473,12 @@ void TritonCTS::findCandidateDummyCells(
   std::ranges::sort(
       dummyCandidates,
       [](const sta::LibertyCell* cell1, const sta::LibertyCell* cell2) {
-        return (getInputCap(cell1) < getInputCap(cell2));
+        const float cap1 = getInputCap(cell1);
+        const float cap2 = getInputCap(cell2);
+        if (cap1 != cap2) {
+          return cap1 < cap2;
+        }
+        return cell1->id() < cell2->id();
       });
 
   if (logger_->debugCheck(utl::CTS, "dummy load", 1)) {