https://bugs.llvm.org/show_bug.cgi?id=46122
Bug ID: 46122
Summary: Wrong line information at Og
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: DebugInfo
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected],
[email protected]
Line 10 is hit multiple times, but there is no loop or inlining.
$ cat -n a.c
1 int a;
2 static int *b;
3 static int **c = &b;
4 void __assert_fail();
5 static int func_7() {
6 int *d = &a;
7 *c = d;
8 b ? (void)0 : __assert_fail();
9 }
10 int main() { func_7(); }
$ cat a.c
int a;
static int *b;
static int **c = &b;
void __assert_fail();
static int func_7() {
int *d = &a;
*c = d;
b ? (void)0 : __assert_fail();
}
int main() { func_7(); }
$ clang -v
clang version 11.0.0 (https://github.com/llvm/llvm-project.git
268fa40daa151d3b4bff1df12b62e5dae94685d7)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Candidate multilib: .;@m64
Selected multilib: .;@m64
$ lldb -v
lldb version 11.0.0
clang revision 268fa40daa151d3b4bff1df12b62e5dae94685d7
llvm revision 268fa40daa151d3b4bff1df12b62e5dae94685d7
$ clang -Og -g -o opt a.c
$ lldb opt
(lldb) target create "opt"
Current executable set to 'opt' (x86_64).
(lldb) b main
Breakpoint 1: where = opt`main + 1 at a.c:10:14, address = 0x0000000000400481
(lldb) r
Process 179 launched: 'opt' (x86_64)
Process 179 stopped
* thread #1, name = 'opt', stop reason = breakpoint 1.1
frame #0: 0x0000000000400481 opt`main at a.c:10:14
7 *c = d;
8 b ? (void)0 : __assert_fail();
9 }
-> 10 int main() { func_7(); }
(lldb) s
Process 179 stopped
* thread #1, name = 'opt', stop reason = step in
frame #0: 0x0000000000400490 opt`func_7 at a.c:10:24
7 *c = d;
8 b ? (void)0 : __assert_fail();
9 }
-> 10 int main() { func_7(); }
(lldb) s
Process 179 stopped
* thread #1, name = 'opt', stop reason = step in
frame #0: 0x0000000000400486 opt`main at a.c:10:24
7 *c = d;
8 b ? (void)0 : __assert_fail();
9 }
-> 10 int main() { func_7(); }
(lldb)
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