<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/64554>64554</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [codesize] Reuse the initialization value for branch
        </td>
    </tr>

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

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

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

<pre>
    test: https://gcc.godbolt.org/z/c9K5ofqq1
```
void ev_tally(int flag)
{
  int a=0, b=1, c=2, d=3;
  if (flag) 
 foo1(a,b,c,d);
  else
     foo2(a,b,c,d);
}
```

*  gcc: Reuse the initialization value
```
ev_tally:
        mov     w3, 3
        mov     w2, 2
        mov     w1, 1
        cbz     w0, .L2
        mov     w0, 0
        b       foo1
.L2:
        b foo2
```
* llvm: Initialize for different branches
```
ev_tally:                               // @ev_tally
 cbz     w0, .LBB0_2
        mov     w0, wzr
        mov     w1, #1 // =0x1
        mov     w2, #2 // =0x2
        mov     w3, #3                          // =0x3
 b       foo1
.LBB0_2:
        mov     w1, #1 // =0x1
        mov     w2, #2                          // =0x2
 mov     w3, #3                          // =0x3
        b foo2
```
</pre>
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