* For ext-narrow-index.ll, move vscale_range attribute closer to the
function definition, rather than through indirect #<num> attribute. This
makes the test a bit easier to read.
* auto-generated CHECK lines for sve-cmp-select.ll and
named-vector-shuffles-sve.ll.
* re-generated CHECK lines for tests that had a mention they were
auto-generated, but where the CHECK lines were out of date.
Try to widen element type to get a new mask value for a better permutation
sequence, so that we can use NEON shuffle instructions, such as zip1/2,
UZP1/2, TRN1/2, REV, INS, etc.
For example:
shufflevector <4 x i32> %a, <4 x i32> %b, <4 x i32> <i32 6, i32 7, i32 2, i32 3>
is equivalent to:
shufflevector <2 x i64> %a, <2 x i64> %b, <2 x i32> <i32 3, i32 1>
Finally, we can get:
mov v0.d[0], v1.d[1]
Reviewed By: dmgreen
Differential Revision: https://reviews.llvm.org/D111619
