Hi,
I am using the GCOV command of GCC and have some puzzles on the branch
information it provides.
For example,
void main()
{
2 int i,j;
2 j=0;
2 if(j<3)
branch 0 taken = 0%
2 j++;
6 for(i=1;i<3;i++)
branch 0 taken =67%
branch 1 taken =100%
branch 2 taken =100%
4 j++;
2 if(j<3)
branch 0 taken=100%
###### j++;
2 }} call 0 returns=0%
call 1 returns =100%
Here for the statement "for(i=1;i<3;i++)", there are three branches: branch 0,
branch 1, and branch 2. Branch 0 is the frequency that the branch statement is
taken. What about the other branches? I don't know what's the meaning of them.
When the if-statement contains more than one expression such as if (i>3 &&
j<2), then there would be 3 branches: branch 0, branch 1, and branch 2. What do
these branches mean? Similarly, for the switch-statement, if there are 4
case-statements and 1 default-statement, there would be 6(not 5) branches. I am
totally lost here.
I sincerely hope that you can solve my puzzles, which is very important for me.
Thanks a lot!
Best Wishes,
Dan
