From 52c5547e796dad45fc232dffd07d7111fe5530e0 Mon Sep 17 00:00:00 2001
From: James Cherry <cherry@parallaxsw.com>
Date: Sun, 5 Jan 2020 13:56:51 -0800
Subject: [PATCH] PathEndLess break ties with startpoint

---
 search/PathEnd.cc | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/search/PathEnd.cc b/search/PathEnd.cc
index dea75332..ad633b9c 100644
--- a/search/PathEnd.cc
+++ b/search/PathEnd.cc
@@ -1959,9 +1959,19 @@ PathEnd::cmp(const PathEnd *path_end1,
     const Path *path1 = path_end1->path();
     const Path *path2 = path_end2->path();
     cmp = Path::cmpPinTrClk(path1, path2, sta);
-    if (cmp == 0)
-      return clkEdgeCmp(path_end1->targetClkEdge(sta),
-			path_end2->targetClkEdge(sta));
+    if (cmp == 0) {
+      cmp = clkEdgeCmp(path_end1->targetClkEdge(sta),
+		       path_end2->targetClkEdge(sta));
+      if (cmp == 0) {
+	PathExpanded expanded1(path1, sta);
+	PathExpanded expanded2(path2, sta);
+	const Path *start1 = expanded1.startPath();
+	const Path *start2 = expanded2.startPath();
+	return Path::cmp(start1, start2, sta) < 0;
+      }
+      else
+	return cmp;
+    }
     else
       return cmp;
   }