gpl: routability save minRcTargetDensity_ by region

Signed-off-by: LucasYuki <[email protected]>

Author: LucasYuki

src/gpl/src/routeBase.cpp

@@ -250,6 +250,7 @@ RouteBase::RouteBase(RouteBaseVars rbVars,
   nbc_ = std::move(nbc);
   log_ = log;
   nbVec_ = std::move(nbVec);
+  minRcTargetDensity_.resize(nbVec.size());
   init();
 }
 
@@ -275,14 +276,14 @@ void RouteBase::revertToMinCongestion()
 
   // revert
   nbc_->revertGCellSizeToMinRc();
-  for (auto& nb :  nbVec_) {
+  for (int j = 0; j < nbVec_.size(); j++) {
     log_->info(GPL,
               58,
               "\t{}\t: {:.4f}",
-              nb->group()->getName(), minRcTargetDensity_);
-    nb->setTargetDensity(minRcTargetDensity_);
-    nb->restoreRemovedFillers();
-    nb->updateDensitySize();
+              nbVec_[j]->group()->getName(), minRcTargetDensity_[j]);
+    nbVec_[j]->setTargetDensity(minRcTargetDensity_[j]);
+    nbVec_[j]->restoreRemovedFillers();
+    nbVec_[j]->updateDensitySize();
   }
   resetRoutabilityResources();
 }
@@ -584,9 +585,11 @@ std::pair<bool, bool> RouteBase::routability(
                curRc,
                minRc_);
     minRc_ = curRc;
-    minRcTargetDensity_ = nbVec_[0]->getTargetDensity();
     min_RC_violated_cnt_ = 0;
-    nbVec_[0]->clearRemovedFillers();
+    for (int i = 0; i < nbVec_.size(); i++) {
+      minRcTargetDensity_[i] = nbVec_[i]->getTargetDensity();
+      nbVec_[i]->clearRemovedFillers();
+    }
 
     // save cell size info
     nbc_->updateMinRcCellSize();

src/gpl/src/routeBase.h

@@ -192,7 +192,7 @@ class RouteBase
   // minRcInflationSize_ will store
   // GCell's width and height
   float minRc_ = 1e30;
-  float minRcTargetDensity_ = 0;
+  std::vector<float> minRcTargetDensity_;
   int min_RC_violated_cnt_ = 0;
   int max_routability_no_improvement_ = 3;
   int max_routability_revert_ = 50;