https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95909
Bug ID: 95909
Summary: Wrong line information at Og
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: massarelli at diag dot uniroma1.it
Target Milestone: ---
After executing function a, line 9 is wrongly hit.
$ cat -n a.c
cat -n aa.c
1 int d;
2 char a() { return 0; }
3 char f(b, c) {}
4 void e() {
5 int h;
6 if (a()) {
7 char g;
8 d = 0;
9 h = (f(g, 7));
10 }
11 }
12 int main() { e(); }
$ cat -n a.c
int d;
char a() { return 0; }
char f(b, c) {}
void e() {
int h;
if (a()) {
char g;
d = 0;
h = (f(g, 7));
}
}
int main() { e(); }
$ gcc -v
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/bin/../libexec/gcc/x86_64-pc-linux-gnu/11.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ./configure --prefix=/tmp/gcc_build --disable-multilib
--enable-languages=c,c++
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 11.0.0 20200624 (experimental) (GCC)
$ gcc -Og -g -o opt a.c
$ gdb opt
(gdb) b main
Breakpoint 1 at 0x4004a6: file a.c, line 12.
(gdb) r
Starting program: opt
Breakpoint 1, main () at /home/stepping/output/a.c:12
12 int main() { e(); }
(gdb) s
e () at /home/stepping/output/a.c:6
6 if (a()) {
(gdb) s
a () at /home/stepping/output/a.c:2
2 char a() { return 0; }
(gdb) s
e () at /home/stepping/output/a.c:9
9 h = (f(g, 7));
(gdb) s
0x00007ffff7a05b97 in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
(gdb)
