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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Wrong line information at Og"
href="https://bugs.llvm.org/show_bug.cgi?id=46122">46122</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Wrong line information at Og
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>DebugInfo
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>massarelli@diag.uniroma1.it
</td>
</tr>
<tr>
<th>CC</th>
<td>jdevlieghere@apple.com, keith.walker@arm.com, llvm-bugs@lists.llvm.org, paul_robinson@playstation.sony.com
</td>
</tr></table>
<p>
<div>
<pre>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 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
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)</pre>
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