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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 -O3 (-O0 is correct)"
href="https://bugs.llvm.org/show_bug.cgi?id=40871">40871</a>
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<tr>
<th>Summary</th>
<td>Wrong debug info generated at -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>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Keywords</th>
<td>wrong-debug
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<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>cmtice@google.com, dblaikie@gmail.com, echristo@gmail.com, jeremy.morse.llvm@gmail.com, llvm-bugs@lists.llvm.org, vsk@apple.com
</td>
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<pre>$ cat outer.c
optimize_me_not() {}
$ cat a.c
int main() {
int k = 0;
for (; k < 1; k++)
;
optimize_me_not();
}
### -O0
(lldb) r
Process 7046 launched: '/home/davide/LLDB-testing/reduce/a.out' (x86_64)
Process 7046 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
frame #0: 0x00000000004004b3 a.out`main at abc.c:5:3
2 int k = 0;
3 for (; k < 1; k++)
4 ;
-> 5 optimize_me_not();
6 }
(lldb) frame var k
(int) k = 1
### -O3
Current executable set to './a.out' (x86_64).
(lldb) br set -p optimize_me_not
Breakpoint 1: where = a.out`main + 1 at abc.c:5:3, address = 0x0000000000400481
(lldb) r
Process 20271 launched: '/home/davide/LLDB-testing/reduce/a.out' (x86_64)
Process 20271 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
frame #0: 0x0000000000400481 a.out`main at abc.c:5:3
2 int k = 0;
3 for (; k < 1; k++)
4 ;
-> 5 optimize_me_not();
6 }
(lldb) frame var k
(int) k = 0</pre>
</div>
</p>
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