<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/69440>69440</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [AArch64][SVE] combine ld1d and splice into ld1ro
        </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/f855xG5Mf
```
define <vscale x 2 x double> @ld1rod_double(<vscale x 2 x i1> %pred, ptr %addr) nounwind {
  %res = call <vscale x 2 x double> @llvm.aarch64.sve.ld1ro.nxv2f64(<vscale x 2 x i1> %pred, ptr %addr)
  ret <vscale x 2 x double> %res
}

define <vscale x 2 x double> @combine(<vscale x 2 x i1> %pred, ptr %addr) nounwind {
  %a = call <vscale x 2 x double> @llvm.aarch64.sve.ld1.nxv2f64(<vscale x 2 x i1> %pred, ptr %addr)
  %res = call <vscale x 2 x double> @llvm.aarch64.sve.splice.nxv2f64(<vscale x 2 x i1> %pred,
 <vscale x 2 x double> %a,
 <vscale x 2 x double> %a)
  ret <vscale x 2 x double> %res
}
```

* current output of llvm
```
ld1rod_double: // @ld1rod_double
  ld1rod { z0.d }, p0/z, [x0]
  ret
combine: // @combine
  ld1d { z0.d }, p0/z, [x0]
  splice z0.d, p0, z0.d, z0.d
 ret
```

</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJysVMtu2zoQ_ZrRhohAD_VcaCFb0V3dVYFuC4qkbBW0aJCU4-brC1Fy0qRFGsMFBPE15Jw5Z2a4c8N-VKqCdAtpE_HJH4ytzr3s-6gz8kcFWBOvnAdWk4P3JwesBmwB270Q8d7IzmgfG7sHbJ8B275I08t_6f890AZoDRldv7CUqh9GRYDtzk5wrciFILkQaaZOK2CPBBKq5cYa-W3dw-K98bAJhpierJKAO3Lydl5yKS1gSUYzjU_DKAnk28UrmY-tcgRYQwTX-i8A9PkYc27FIUtid1ZxQBSPlzP2WXI7oisIq_xHjgPElbW8WSefZk2YYzeM_5Avfgdb93N1n2DupAehbkCxuv1QHf55u7skf1sx6x9rIiZr1eiJmfxp8sT0ZI77j5felhCryVKxv1fXCnPZnBOAPNN4njRBGroU9Y5Aur1QSJtf4lqm17R74-O6-fr6LW8v4gXjq-HuZRXGxfAFw7vgI1kxWbKSR6raZGWeIZYFiw5VLgtR9KwvleoExzznKLu02GQ0oyKheTRUSJFt6KagZZohi3PJFMtRJL3oEuwKSKg68kHHIeOM3UeDc5OqsjJJaKR5p7QLrRRxVE8kHALi3FltNd956Ka9m1UYnHevr_jB69CD6zok8cxGuv3y9RHShqxsLjTyUV4JGkZvFuWiyerqXXMe_GHqYmGOgG3Ik2V4OFnzXQkP2AZ0DrAN6H8GAAD__zxmvoc">