no crpr for ideal clocks

Signed-off-by: James Cherry <cherry@parallaxsw.com>

search/ClkInfo.cc

@@ -58,7 +58,7 @@ ClkInfo::ClkInfo(const ClockEdge *clk_edge,
   clk_edge_(clk_edge),
   clk_src_(clk_src),
   gen_clk_src_(gen_clk_src),
-  crpr_clk_path_(crpr_clk_path),
+  crpr_clk_path_(is_propagated ? crpr_clk_path : PathVertexPtr()),
   uncertainties_(uncertainties),
   insertion_(insertion),
   latency_(latency),

search/Crpr.cc

@@ -186,7 +186,7 @@ CheckCrpr::checkCrpr1(const Path *src_path,
       // For path from latches that are borrowing the enable path
       // is from the opposite min/max of the data.
       && src_clk_min_max != tgt_clk_path->minMax(this)
-      && (src_clk_path != nullptr
+      && (src_clk_path
 	  || src_clk->isGenerated())) {
     // Src path from input port clk path can only be from generated clk path.
     PathVertex port_clk_path;

search/Search.cc

@@ -1144,6 +1144,8 @@ ArrivalVisitor::visit(Vertex *vertex)
   if (crpr_active_
       && search_->crprPathPruningEnabled()
       && !vertex->crprPathPruningDisabled()
+      // No crpr for ideal clocks.
+      && tag_bldr_->hasPropagatedClk()
       && !has_fanin_one_)
     pruneCrprArrivals();
 

search/TagGroup.cc

@@ -141,6 +141,7 @@ TagGroupBldr::TagGroupBldr(bool match_crpr_clk_pin,
   has_genclk_src_tag_(false),
   has_filter_tag_(false),
   has_loop_tag_(false),
+  has_propagated_clk_(false),
   sta_(sta)
 {
 }
@@ -245,6 +246,8 @@ TagGroupBldr::setMatchArrival(Tag *tag,
       has_filter_tag_ = true;
     if (tag->isLoop())
       has_loop_tag_ = true;
+    if (tag->clkInfo()->isPropagated())
+      has_propagated_clk_ = true;
   }
 }
 

search/TagGroup.hh

@@ -110,6 +110,7 @@ public:
   bool hasGenClkSrcTag() const { return has_genclk_src_tag_; }
   bool hasFilterTag() const { return has_filter_tag_; }
   bool hasLoopTag() const { return has_loop_tag_; }
+  bool hasPropagatedClk() const { return has_propagated_clk_; }
   void tagMatchArrival(Tag *tag,
 		       // Return values.
 		       Tag *&tag_match,
@@ -140,9 +141,10 @@ protected:
   ArrivalSeq arrivals_;
   PathPrevSeq prev_paths_;
   bool has_clk_tag_;
-  bool has_genclk_src_tag_:1;
+  bool has_genclk_src_tag_;
   bool has_filter_tag_;
   bool has_loop_tag_;
+  bool has_propagated_clk_;
   const StaState *sta_;
 };