<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/119646>119646</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang] Miscompilation at -Os
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang
      </td>
    </tr>

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

    <tr>
      <th>Reporter</th>
      <td>
          cardigan1008
      </td>
    </tr>
</table>

<pre>
    This code prints 1 at -Os and 0 at -O0/1/2/3:
```c
int printf(const char *, ...);
long a, b = 208;
short c;
long(d)(long e) { return (a && e && 2036854775807 / e) * a; }
void f(long *e) {
  if (d(c | (*e = b || 0)))
 for (;;)
      ;
}
int main() {
  long *g = &b;
  *g = 0;
  f(&b);
 printf("%d\n", (int)b);
}
```

Compiler Explorer: https://godbolt.org/z/vPvna9s5Y 

Bisected to https://github.com/llvm/llvm-project/commit/ebe741fad07e3fda388d0fa44f256a07429cce6a which was committed by @haopliu 
</pre>
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