<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/64093>64093</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            instruction-referencing creates DW_OP_deref_size with invalid/too large size
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            wrong-debug,
            debuginfo
      </td>
    </tr>

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

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

<pre>
    From a discussion/debugging here: https://reviews.llvm.org/D154907
```
void b(double);
void c();
void e(double e) {
  c();
 b(e);
}
```
```
$ clang-tot x.ii -g -c -o - -O3 | llvm-dwarfdump-tot - | grep DW_OP_deref_size
 [0x0000000000000006, 0x0000000000000016): DW_OP_breg7 RSP+0, DW_OP_deref_size 0x10, DW_OP_stack_value)
```
This seems to be created here: https://github.com/llvm/llvm-project/blob/dd84f5f91c6b234a2f188b6acf8557cae81b8a53/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp#L1280-L1281 - where the size is 16 (0x10).
</pre>
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