Merging r370592:

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r370592 | rksimon | 2019-08-31 18:21:31 +0200 (Sat, 31 Aug 2019) | 3 lines

[X86] EltsFromConsecutiveLoads - Don't confuse elt count with vector element count (PR43170)

EltsFromConsecutiveLoads was assuming that the number of input elts was the same as the number of elements in the output vector type when creating a zeroing shuffle, causing an assert when subvectors were being combined instead of just scalars.
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llvm-svn: 371382