<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/69822>69822</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [AArch64][SVE] use structure load ld3, but not structure store st3
        </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/d1W8b5j3K
```
typedef struct {
    float x;
    float y;
    float z;
} patic;

int foo (patic *ps, float factor, int num) {
  for (int i = 0; i < num; i++) {
        ps[i].x = factor * ps[i].x;
    ps[i].y = factor * ps[i].y;
  }
  return 0;
}
```

* llvm already choose the structure load ld3, but not structure store st3
```
.LBB0_4:                                // =>This Inner Loop Header: Depth=1
        ld3     { v1.4s, v2.4s, v3.4s }, [x11], #48             ---------- expected structure load ld3
        subs x10, x10, #4
        fmul    v4.4s, v1.4s, v0.s[0]
        fmul v1.4s, v2.4s, v0.s[0]
        ext     v2.16b, v1.16b, v1.16b, #8
 ext     v3.16b, v4.16b, v4.16b, #8
        zip1    v5.2s, v4.2s, v1.2s
        zip2    v1.2s, v4.2s, v1.2s
        zip1    v4.2s, v3.2s, v2.2s
        zip2    v2.2s, v3.2s, v2.2s
        str     d5, [x12]
 stur    d1, [x12, #12]
        str     d4, [x12, #24] -------  unexpected normal str & stur 
        stur    d2, [x12, #36]
        mov     x12, x11
        b.ne    .LBB0_4
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJycVUuvqzYQ_jXDZnSQPea5YBEON2rVu2vVLiseJnBFMMImTc6vr-yQ10mOelULMbbnm9fnAZda97tRygzCHMLCKxfTqTk7tE3bepVqThnQBo3UBsQGO2MmDWIDtAXa7ura36mmUoPx1bwD2n4AbRv-V1KFP8RvwApgG4jY-rilOU2ykS1qMy-1QYjz8z4iYjuo0uARxNPe6cXex3UP4gKn0vT1bce9-9FgqxQCJU6NQJtJA72vHtqyNmq2a4sclz1Qep9Rq2Zra5U9giiQgcjd9N2h7QIod8-dIbB00hDmPYSFf3SG50g2Pt6pHoq67Z--NrnnAeLiMp2lWebRpXdl5CX765s2OAyHPZbDLMvmhHWnlJZoOrmeyzJLHFTZ4NAIy0-1GByVudNqo9xbvIzjf89z9ndgW-Y_xrmTbMUgvv3R9Rp_HUc543elJvxFlo2crZdCTqYDUfAbYXYMjTh7iXM8cD9wh3ugy0T4gXY80TtCmB85h_C8IBEkD3m8XQfK4yRrI5tXXDxE10ul8ciZ9bgK6_gR1O6XwcpDcMnqmifz7cEym9OzyYtyvsLLo3HyQD6PqjXG0wxIJKvd1UBcYcHz7M5gHR_9xJ1d6JNewXQpivQTmByY_xyYryzR5ezoUv6XnuknwNrMTjbhtQvoxqA2i1M3_E57rv0e9tlX8ISmAMLi0kWIy3jtolHN-3JwtkDROeJnt2sS9ORWRE9J7NXByRVkm_pBX_mjtPLyDT5-n16TiSYVaenJjEdpnMRpFDKvy4KQVVEbRCwsZVXJOE5EmkjeBpxHnDXc6zNiJDgjzlIecOZXSRu1EUmZlHUp4xgCJvdlP_j232IvBK_XepFZlCZE3lBWctDumiEa5T_olECWZW_OrM1btew0BGzotdE3L6Y3g7ufNpu57iJLNIT5739-s4wv-n_8s7xlHrJPd1lvuqXya7UH2trQq3ibZvVD1gZo6xLWQFtX0L8BAAD__6mb5qk">