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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Wrong debug info generated at -O1/-O2/-O3 (-O0 is correct)"
href="https://bugs.llvm.org/show_bug.cgi?id=40838">40838</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Wrong debug info generated at -O1/-O2/-O3 (-O0 is correct)
</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>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Keywords</th>
<td>wrong-debug
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>davide@freebsd.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>$ cat 4.c
typedef int a;
a c, d;
char e;
char(b)(f) { return f; }
int main() {
c = e;
a l_1499 = 2922543915;
l_1499 = b(6);
l_1499 *d;
optimize_me_not();
}
$ cat outer.c
void optimize_me_not() {}
(lldb) target create "./a.out"
Current executable set to './a.out' (x86_64).
(lldb) br set -p optimize_me_not
Breakpoint 1: where = a.out`main + 14 at 4.c:10:3, address = 0x000000000040049e
(lldb) r
Process 23400 launched: '/home/davide/finished_reducing/a.out' (x86_64)
Process 23400 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
frame #0: 0x000000000040049e a.out`main at 4.c:10:3
7 a l_1499 = 2922543915;
8 l_1499 = b(6);
9 l_1499 *d;
-> 10 optimize_me_not();
11 }
(lldb) frame var l_1499
(a) l_1499 = -1372423381
#####
-O0
(lldb) frame var l_1499
(a) l_1499 = 6</pre>
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