<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/64293>64293</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [vectorization] gcc generate better code for a loop body with scalar and array expansion
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          zhongsir1
      </td>
    </tr>
</table>

<pre>
    test: https://godbolt.org/z/eMedWs4Ef
```
void s257(void) {
  for (int i = 1; i < LEN_2D; i++) {
    for (int j = 0; j < LEN_2D; j++) {
 aa[j][i] = a[i] + bb[j][i];
    }
  }
}
```

* gcc: generate a sve loop
```
.L3:
  ld1d z31.d, p7/z, [x4, x0, lsl 3]
 ld1d z30.d, p7/z, [x3, x0, lsl 3]
  fadd z31.d, p7/m, z31.d, z30.d
 st1d z31.d, p7, [x1, x0, lsl 3]
  add x0, x0, x5
  whilelo p7.d, w0, w2
  b.any .L3
```
* llvm:
```
.LBB0_2: // Parent Loop BB0_1 Depth=1
  // => This Inner Loop Header: Depth=2
  add x13, x8, x12
 ldr d1, [x13, #8]
  ldr d2, [x13, #1032]
  add x13, x9, x12
  add x12, x12, #2048
  fadd d1, d0, d1
  cmp x12, #32, lsl #12 // =131072
  fadd d2, d0, d2
  str d1, [x13, #8]
  str d2, [x13, #1032]
  b.ne .LBB0_2
```

</pre>
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