[llvm] [SLP] Enable full non-power-of-2 vectorization by default (PR #199450)

[Simon Pilgrim via llvm-commits]

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@@ -4,26 +4,7 @@
 define <16 x i64> @test() {
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RKSimon wrote:

redundant test? or does it need updating?

https://github.com/llvm/llvm-project/pull/199450