<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/68898>68898</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Incorrect debug info generated at -O3 (-O0 is correct)
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          hemangdash
      </td>
    </tr>
</table>

<pre>
    ```
$ clang-trunk --version
clang version 18.0.0 (https://github.com/llvm/llvm-project.git 1964118ace4926f4d103aa0538db1f1f5baa343a)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
```

```
$ cat abc.c
int a[256];
int b, c;
char d;
int main() {
  int e = 0;
  for (; e < 256; e++)
 a[e] = e;
  short f;
  char l_1029 = 9;
  int *g = &c;
 d++;
  f = -1;
  l_1029 = f ^ 52;
  *g = *g != 0;
  b = 5;
}
```

```
$ clang-trunk abc.c -g -O0
$ lldb-trunk ./a.out -s cmds
(lldb) target create "./a.out"
Current executable set to '/data2/hemang/test3/reduction/a.out' (x86_64).
(lldb) command source -s 0 'cmds'
Executing commands in '/data2/hemang/test3/reduction/cmds'.
(lldb) b 14
Breakpoint 1: where = a.out`main + 107 at abc.c:14:9, address = 0x000000000000119b
(lldb) r
Process 539940 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
    frame #0: 0x000055555555519b a.out`main at abc.c:14:9
   11     d++;
   12     f = -1;
   13     l_1029 = f ^ 52;
-> 14          *g = *g != 0;
   15     b = 5;
   16   }
Process 539940 launched: '/data2/hemang/test3/reduction/a.out' (x86_64)
(lldb) p l_1029
(char) '\xcb'
(lldb) kill
Process 539940 exited with status = 9 (0x00000009) killed
(lldb) q
```

```
$ clang-trunk abc.c -g -O3
$ lldb-trunk ./a.out -s cmds
(lldb) target create "./a.out"
Current executable set to '/data2/hemang/test3/reduction/a.out' (x86_64).
(lldb) command source -s 0 'cmds'
Executing commands in '/data2/hemang/test3/reduction/cmds'.
(lldb) b 14
Breakpoint 1: where = a.out`main + 902 at abc.c:14:11, address = 0x00000000000014b6
(lldb) r
Process 541323 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
    frame #0: 0x00005555555554b6 a.out`main at abc.c:14:11
   11     d++;
   12     f = -1;
   13     l_1029 = f ^ 52;
-> 14          *g = *g != 0;
   15     b = 5;
   16   }
Process 541323 launched: '/data2/hemang/test3/reduction/a.out' (x86_64)
(lldb) p l_1029
(char) '\t'
(lldb) kill
Process 541323 exited with status = 9 (0x00000009) killed
(lldb) q
```

```
$ cat cmds
b 14
r
p l_1029
kill
q
```

The issue exists as early as clang-3.4. 
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsV01v4zYQ_TXjy0ACOdTnwQc7XgF72h72vqAk6qORJZekNt5_X1CSbSUOkgYtGqCoYSDOvKfhG87MAySNaeteqS2EewgPGznaZtDbRh1lX5fSNJt8KH9tIWLLlx2A7YACLDrZ157VY_-InvdTadMO_QxPEC4h5InPfIZASWPtyYDYAWVAWd3aZsz9YjgCZV338_LHO-nhd1VYv24t8jQKOE9koYKUoiooORNSslAkZc4rXoW5lCIQEiidz_4uda0siB2ek-hHFHhj_9gPT73Xtf149up-XHiNVrLE41CqzrFPg2nPM_S1N1Z2nSoPrXYQUDYa7dQNheyAsrxdCn15La8G3V1JizIv_GIOtb1FCeGewgjCA4j9LZwDPWBxDRWN1Fg-Yxxl2wMlQClCvMQRHaIQxAHZlY1YDdrdO4j9BD6gO9H9A7SfvsulTWoUhIcpg1plMM2gLVaryCSp-8GZEyAOmK4wpwJoV08AUHQrBMvlyJW4ieXxVWiVtkIIv2BIK3SV2f0g_rLcfELDawTiwwf7tJrpqV_o1eh9WzG6rswXgg-USX8YLXoGi2NpLqzEkVx_7DSLWGglrUIguj4CRDP7YdRaud6dVTFamXcKjbJoBwSKgbJSWklA2byQQJlVxgqgTKtyLKxbuWvK2PV6nnqg1L-TUwzHo-xLNMOoC-VUu62MJ-kUz_Qvk462ry9sg23_ES1LtvvTc-TBHNxrJR9PgxsW7vbrqVF6nt25kIi5GUegPXIW43V3xI4HIHapWxFZlloZM0_8ma0-nKf53eF6jvymh8I9FYo0DRgaO5xOqrywd2hnUwAS3B3Sy6NaBi6-3LGLu-dQK2mGfoLzVUE-v0wjYqWnBCSYK3OWGV4-PM2f13tf5yUR54jAUnxliZDTgr2yTsjFAr61WB6IL8iDhfnukiEPF-rLdXNY5KDr3r24706OfdGocjbVvzfedy0-LUVeAWdUk0tSDOHDucivQ7566rHtule1qnNrVYlPrW3QWGnHedZcuuQ6cOklxW2Irpn_-EesR_xvPZ9kPSmju5Xk_B3vCfLoXe8JuCDxud4T5NHb3sP5f8h85gv_TPOxf9F6ZqX_uvVIuzKR27Isg_u8tpvqt0753ihsjRmVK8ZYg9Kgkrr75X7MVif8wMdNuRVlKlK5UVsepTEnIiE2zbYoRKTCKEpYyMJcRbEIA1YlVcVzSsNKbtotMRKcceJByITwWZwqkeYlCR6lEVUQMHWUbee7dwp_0PVmErSNkiRNNp3MVWemtx6iXj3Nap03hoeN3k7vIflYGwhY5wq4ZbGt7dT2a18MWqvCYqnysca2rwasVa-0dL2T1nm3a5j3jWFrcGEDpZtRd9uPvQkBZZM8A5RN8v8MAAD___Y4sv4">