1 files changed, 17 insertions, 0 deletions
diff --git a/compiler-rt/lib/fuzzer/scripts/merge_data_flow.py b/compiler-rt/lib/fuzzer/scripts/merge_data_flow.py
index d6000fa0ed1..9f690182656 100755
--- a/compiler-rt/lib/fuzzer/scripts/merge_data_flow.py
+++ b/compiler-rt/lib/fuzzer/scripts/merge_data_flow.py
@@ -22,20 +22,37 @@ def Merge(a, b):
 
 def main(argv):
   D = {}
+  C = {}
+  # read the lines.
   for line in fileinput.input():
+    # collect the coverage.
     if line.startswith('C'):
+      COV = line.strip().split(' ')
+      F = COV[0];
+      if not F in C:
+        C[F] = {0}
+      for B in COV[1:]:
+        C[F].add(int(B))
       continue
+    # collect the data flow trace.
     [F,BV] = line.strip().split(' ')
     if F in D:
       D[F] = Merge(D[F], BV)
     else:
       D[F] = BV;
+  # print the combined data flow trace.
   for F in D.keys():
     if isinstance(D[F], str):
       value = D[F]
     else:
       value = D[F].decode('utf-8')
     print("%s %s" % (F, value))
+  # print the combined coverage
+  for F in C.keys():
+    print("%s" % F, end="")
+    for B in list(C[F])[1:]:
+      print(" %s" % B, end="")
+    print()
 
 if __name__ == '__main__':
   main(sys.argv)