Considering the following fortran code:
=== begin code ===
program main
implicit none
integer :: a = 7
if( a == 0 ) then
print *, "a is null"
else if( a > 0 ) then
print *, "a is positif"
else
print *, "a is negatif"
end if
end program
=== end code ===
compiled with the "-fprofile-arcs -ftest-coverage" option flags,
linked with the same flags, with gfortran-4.3.4 or gfortran-4.4.1
After a single execution, the profile file is built as usual with:
$ gcov main
The resulting profile is then:
$ cat main.f90.gcov
-: 0:Source:main.f90
-: 0:Graph:main.gcno
-: 0:Data:main.gcda
-: 0:Runs:1
-: 0:Programs:1
1: 1:program main
-: 2:
-: 3: implicit none
-: 4:
-: 5: integer :: a = 7
-: 6:
3: 7: if( a == 0 ) then
#####: 8: print *, "a is null"
-: 9: else if( a > 0 ) then
1: 10: print *, "a is positif"
-: 11: else
#####: 12: print *, "a is negatif"
-: 13: end if
-: 14:
-: 15:end program
First remark: line 7 is marked '3' instead of '1'
Second remark: line 9 is discarded (marked '-') instead of '1'
When using the current snapshot of gfortran-4.5 (2009-09-15), the
result is slightly different:
$ cat main.f90.gcov
-: 0:Source:main.f90
-: 0:Graph:main.gcno
-: 0:Data:main.gcda
-: 0:Runs:1
-: 0:Programs:1
1: 1:program main
-: 2:
-: 3: implicit none
-: 4:
-: 5: integer :: a = 7
-: 6:
2: 7: if( a == 0 ) then
#####: 8: print *, "a is null"
-: 9: else if( a > 0 ) then
1: 10: print *, "a is positif"
-: 11: else
#####: 12: print *, "a is negatif"
-: 13: end if
-: 14:
2: 15:end program
Note that line 7 is counted twice, as well as the last line !
--
Summary: [fortran] 'else if' statement is discarded and
incoherent line count
Product: gcc
Version: 4.3.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: Edouard dot Canot at irisa dot fr
GCC build triplet: i686-linux-gnu
GCC host triplet: i686-linux-gnu
GCC target triplet: i686-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41359
