<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/133751>133751</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            SLPVectorizer: "Reshuffling scalars not yet supported for nodes with padding" assert
        </td>
    </tr>

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

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

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

<pre>
    ```
$ cat /tmp/a.ll
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-grtev4-linux-gnu"

define void @gsl_matrix_long_double_minmax_index() {
entry:
  br i1 false, label %cleanup22, label %for.cond6.preheader.us.preheader

for.cond6.preheader.us.preheader: ; preds = %entry
  %cmp14.us = fcmp ogt x86_fp80 0xK00000000000000000000, 0xK00000000000000000000
  %imax.2.us = select i1 %cmp14.us, i64 0, i64 0
  %jmax.2.us = select i1 %cmp14.us, i64 0, i64 0
 %cmp13.us = fcmp olt x86_fp80 0xK00000000000000000000, 0xK00000000000000000000
  %imin.2.us = select i1 %cmp13.us, i64 0, i64 0
 %jmin.2.us = select i1 %cmp13.us, i64 0, i64 0
  br label %cleanup22

cleanup22:                                        ; preds = %for.cond6.preheader.us.preheader, %entry
  %storemerge64 = phi i64 [ 0, %entry ], [ %imin.2.us, %for.cond6.preheader.us.preheader ]
  %storemerge63 = phi i64 [ 0, %entry ], [ %jmin.2.us, %for.cond6.preheader.us.preheader ]
 %storemerge62 = phi i64 [ 0, %entry ], [ %imax.2.us, %for.cond6.preheader.us.preheader ]
  %storemerge = phi i64 [ 0, %entry ], [ %jmax.2.us, %for.cond6.preheader.us.preheader ]
  ret void
}
$ opt -p slp-vectorizer /tmp/a.ll -disable-output
opt: ../../llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:3714: TreeEntry *llvm::slpvectorizer::BoUpSLP::newTreeEntry(ArrayRef<Value *>, TreeEntry::EntryState, ScheduleBundle &, const InstructionsState &, const EdgeInfo &, ArrayRef<int>, ArrayRef<unsigned int>): Assertion `(hasFullVectorsOrPowerOf2(*TTI, 
getValueType(VL.front()), VL.size()) || ReuseShuffleIndices.empty()) && "Reshuffling scalars not yet supported for nodes with padding"' failed. 

```

@alexey-bataev 
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJysVktv2zgQ_jX0hZAgkXrYBx_kpAaCDdCiyeYa0OJIZpYiCT4Se3_9grRd22i33aRrCDJnOI9vqE8zYs6JUQEsUb1C9e2MBb_VdskgbJj6y802mu-XqCmOV9EhUuGeeYzI2k8GkTXLpURF55kdwWPOPJNsr4PHiN5iRAhkE6IdZIa0BaIdJekWxfJajKumSrdMfFuUZI5oV5J5NsyL40olVXNyb6rsIZoRcsbhrTASThh28-a5qbLRenitMilU2GWjCgcPVHQcBqEAv2rBMaqK0cnniXkrds9Sq_GZ67CR8DwJNbHds1AcdijmW2DUrlDRgfJ2j2iMhPHGYlHigUkHiNxgyTYgMSJ1L4GpYAi50g7a5r1WvMmNhS0wDjYP7iwc8P3SinYY0RU2Frg7Fl0fUEVIMftkyioPh82hnwzWo8fxXAYzL3Cx-6P4wS9C_betY2AxsV1OTpEdSOh9PICLnDGKaCpcnBdH55ePOh8N6HVF8n-qSKifgKI_A_XyUd9Imx9QJT39s0g7_B9_37HhlxQiN9-RxnltYQI7QlOlOGYrEmRUrw74Tx4Y1bdJrldXR3i0-VXy5P59UvqupC8fTHqdk7yz0COBf6vQd5b5wZQWfOpwkVTt7bGVa-NxZrCTJnuF3msr_o4ul80dZ1w4tpGQ6eBN8KjotPGRi3mOyDrdpHyd4p_YILJ-tEy5QdvJIbJ-OkVFZP1w_-WbaPPemNjB2zK2evxoAT4dyiVdCkc7RDsnzRnXQbXSf5qH-y8HQcHbN09E5p21bP8VBkRvnpgMEIMh-ike1dksOablg2c-demHfgs8SFgFxePYIE3U9lo5j--U8zb0XmjlksP19ic-wp0a9El7AUEof0x-oQwqTVyOT7uLWH7nHNiYAscxS-Zb5tZBysNxuc_2i34D-3kgae50j4936ekX3Qg-Ffq4N4DI_Ok-H6xW_jCe0nWDn-5zlx7AUYdRe4PaG_wVgoOHbRgGCXeKix5cDpPx-wvLWFMTR-hXcMlSqBG7nklmHVba4z147IIx2nrgeNAWK83B4Tfht9gwzoUa45wlLR6YkMBzfOhqVx8VRYeqgknYwT7bMM_gFc_4kvIFXbAZLMu2olVVlG092y5p1QK0rJ9TxgfaV-2CE9KWBSNVWzbzzUwsSUHqgtKybOqmrPOesYrMCdkM1aIfygWqCpiYkHnkWa7tOBPOBViWlLZ1OUt92KUvIkIUvOG0G4uob2d2GZ2yTRgdqgopnHfnMF54CcsrmqfR_NvHh1nixyxYudx6b1wkMVkjsh6F34ZN3uvp4jWMCI3VL9B7RNYJfnwXj_W9Lsk_AQAA___kdfRe">