Hello,     After compilation of source code with flags -fprofile-arcs, 
-ftest-coverage and -fdump-tree-cfg-graph-lineno i get file with extension 
.cfg.dot which can be opened in graphviz, and files with extensions .gcda and 
.gcno when the program is executed. With gcov those files can be converted to 
coverage report with extension .gcov. Because control flow graph is created 
during compilation number of executions (FREQ) and percentage at which each 
branch is taken are equal to 0. Is there a way to update control flow graph 
with information from any of the files created after execution like .gcov or 
.gcda/.gcno?   Thank you  Best regards

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