https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101644
Bug ID: 101644
Summary: [GCOV] Label after "return" has wrong coverage.
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
Assignee: unassigned at gcc dot gnu.org
Reporter: njuwy at smail dot nju.edu.cn
CC: marxin at gcc dot gnu.org
Target Milestone: ---
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/10.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure -enable-checking=release -enable-languages=c,c++
-disable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.2.0 (GCC)
$ cat test.c
#include<stdlib.h>
#include<stdio.h>
int main() {
l1:
return &&l1 - &&l2;
l2:
printf("Executed\n");
}
$ gcc -O0 --coverage test.c;./a.out;gcov test;cat test.c.gcov
File 'test.c'
Lines executed:100.00% of 4
Creating 'test.c.gcov'
-: 0:Source:test.c
-: 0:Graph:test.gcno
-: 0:Data:test.gcda
-: 0:Runs:1
-: 1:#include<stdlib.h>
-: 2:#include<stdio.h>
1: 3:int main() {
1: 4:l1:
1: 5: return &&l1 - &&l2;
1: 6:l2:
-: 7: printf("Executed\n");
-: 8:}
Line 6 was wrongly marked as executed.
