https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101487
Bug ID: 101487
Summary: [GCOV] Wrong coverage of "switch" inside "while" loop
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
void foo(int x, int y) {
while (x > 0)
switch (({
if (y)
break;
y;
})) {
case 2:
x = 0;
}
}
int main() {
foo(1, 1);
return 0;
}
$ gcc -O0 --coverage test.c;./a.out;gcov test;cat test.c.gcov
File 'test.c'
Lines executed:66.67% of 12
Creating 'test.c.gcov'
-: 0:Source:test.c
-: 0:Graph:test.gcno
-: 0:Data:test.gcda
-: 0:Runs:1
1: 1:void foo(int x, int y) {
1: 2: while (x > 0)
#####: 3: switch (({
1: 4: if (y)
1: 5: break;
#####: 6: y;
-: 7: })) {
#####: 8: case 2:
#####: 9: x = 0;
-: 10: }
1: 11:}
-: 12:
1: 13:int main() {
1: 14: foo(1, 1);
1: 15: return 0;
-: 16:}
Line 3 was wrongly marked as unexecuted
