https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85336
Bug ID: 85336
Summary: [GCOV] wrong coverage for builtin functions and "||"
logic operators in return statement
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
Assignee: unassigned at gcc dot gnu.org
Reporter: yangyibiao at nju dot edu.cn
CC: marxin at gcc dot gnu.org
Target Milestone: ---
$ cat small.c
#include <string.h>
static int special_format (const char *fmt)
{
return (
strchr (fmt, '*') != 0 ||
strchr (fmt, 'V') != 0 ||
strchr (fmt, 'S') != 0 ||
strchr (fmt, 'n') != 0 );
}
int main()
{
special_format ("ee");
return 0;
}
$ gcc --coverage small.c; ./a.out; gcov-8 small.c; cat small.c.gcov
File 'small.c'
Lines executed:100.00% of 8
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:#include <string.h>
-: 2:
1: 3:static int special_format (const char *fmt)
-: 4:{
-: 5: return (
2: 6: strchr (fmt, '*') != 0 ||
1: 7: strchr (fmt, 'V') != 0 ||
3: 8: strchr (fmt, 'S') != 0 ||
1: 9: strchr (fmt, 'n') != 0 );
-: 10:}
-: 11:
1: 12:int main()
-: 13:{
1: 14: special_format ("ee");
1: 15: return 0;
-: 16:}
Line #6, #7, #8, #9 are wrongly marked with different different execution times
in a single return statement.
