<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/137152>137152</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [GlobalOpt] Incorrect change of atomic type
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            llvm:crash,
            llvm:optimizations
      </td>
    </tr>

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

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

<pre>
    ```llvm
; RUN: opt -S -passes=globalopt
@g = internal global ptr null, align 8

define void @init() {
  %alloc = call ptr @malloc(i64 48)
  store atomic ptr %alloc, ptr @g seq_cst, align 8
  ret void
} 

define i1 @check() {
  %val = load atomic ptr, ptr @g seq_cst, align 8
  %cmp = icmp eq ptr %val, null
  ret i1 %cmp
}

declare ptr @malloc(i64) allockind("alloc,uninitialized") allocsize(0)
```
Results in:
```
atomic memory access' size must be byte-sized
 i1  store atomic i1 true, ptr @g.init seq_cst, align 1
atomic memory access' size must be byte-sized
 i1  %g.init.val = load atomic i1, ptr @g.init seq_cst, align 1
LLVM ERROR: Broken module found, compilation aborted!
```

</pre>
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