<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/62251>62251</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [vectorization] gcc generate better code base on predicate SVE
        </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/KhzPM7fsd
* gcc: generate SVE for kernel loop
  ```
  .L4:
        ld2d    {z0.d - z1.d}, p0/z, [x1]
 sub     z0.d, z1.d, z0.d
        st1d    z0.d, p0, [x2, x0, lsl 3]
 add     x1, x1, x9
        add     x0, x0, x10
        whilelo p0.d, w0, w4
        b.any   .L4
  ```
* llvm: don't generate vectorization at all even with -mllvm -enable-pre=false, so it is different from issue #53443
```
.LBB0_5:                                // Parent Loop BB0_3 Depth=1
        add     x13, x9, x10, lsl #3
 add     x15, x10, #2
        ldp     x13, x14, [x13]
        sub x13, x14, x13
        add     x14, x10, #3
        mov     x10, x15
 cmp     x14, x11
        str     x13, [x9, x12]
        add x12, x12, #8
        b.lt    .LBB0_5
```
</pre>
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