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<head>
<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<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=46002">46002</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>ditaliano@apple.com, jdevlieghere@apple.com, keith.walker@arm.com, llvm-bugs@lists.llvm.org, paul_robinson@playstation.sony.com
</td>
</tr></table>
<p>
<div>
<pre>Line information is wrong for line 17.
$ cat amod.c
int a ;
static int *b ;
char c;
void __assert_fail () __attribute__ ((__noreturn__));
static short d() {
b = a
;
}
int main ()
{
d();
{
int p_14, p_11 ;
if (2 ^ c) ;
else
((p_14 == &p_11) ? (void) (0) : __assert_fail ("p_14 == &p_11",
"a.c", 131, __func__));
}
}
$ 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 amod.c
$ lldb opt
(lldb) target create "opt"
Current executable set to 'opt' (x86_64).
(lldb) b main
Breakpoint 1: where = opt`main + 1 at amod.c:12:6, address = 0x00000000004004e1
(lldb) r
Process 64 launched: 'opt' (x86_64)
Process 64 stopped
* thread #1, name = 'opt', stop reason = breakpoint 1.1
frame #0: 0x00000000004004e1 opt`main at amod.c:12:6
9
10 int main ()
11 {
-> 12 d();
13 {
14 int p_14, p_11 ;
15 if (2 ^ c) ;
(lldb) s
Process 64 stopped
* thread #1, name = 'opt', stop reason = step in
frame #0: 0x0000000000400510 opt`d at amod.c:17:47
14 int p_14, p_11 ;
15 if (2 ^ c) ;
16 else
-> 17 ((p_14 == &p_11) ? (void) (0) : __assert_fail ("p_14 ==
&p_11", "a.c", 131, __func__));
18 }
19 }
(lldb) bt
* thread #1, name = 'opt', stop reason = step in
* frame #0: 0x0000000000400510 opt`d at amod.c:17:47
frame #1: 0x00000000004004e6 opt`main at amod.c:12:6
frame #2: 0x00007ffff7a05b97 libc.so.6`__libc_start_main + 231
frame #3: 0x000000000040041a opt`_start + 42
(lldb) di
opt`d:
-> 0x400510 <+0>: retq
(lldb)
$ gdb opt
(gdb) b main
Breakpoint 1 at 0x4004e1: file amod.c, line 12.
(gdb) s
The program is not being run.
(gdb) r
Starting program: opt
Breakpoint 1, main () at amod.c:12
12 d();
(gdb) s
0x0000000000400510 in d () at amod.c:17
17 ((p_14 == &p_11) ? (void) (0) : __assert_fail ("p_14 ==
&p_11", "a.c", 131, __func__));
(gdb)</pre>
</div>
</p>
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