Fangrui Song eafe7c14ea [PowerPC] Fix combineVectorShuffle regression after D77448
Commit 1fed131660b2 assumed that NewShuffle (shuffle vector
canonicalization result) will always be ShuffleVectorSDNode, which may
be false (it may be a BITCAST node):

```
...
t12: v4i32 = scalar_to_vector t2
t15: v16i8 = bitcast t12  # LHS
t17: v16i8 = vector_shuffle<u,u,u,u,u,u,u,u,0,1,2,3,u,u,u,u> t15, undef:v16i8  # SVN
```

Reviewed By: #powerpc, nemanjai

Differential Revision: https://reviews.llvm.org/D83617
2020-07-13 16:57:27 -07:00
..
2018-09-07 07:56:05 +00:00
2020-03-19 08:34:48 -05:00
2019-03-29 17:35:56 +00:00
2020-06-01 02:30:27 +00:00