[llvm] [VPlan] Implement VPlan-based unit-strideness speculation (PR #182595)

[Florian Hahn via llvm-commits]

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@@ -70,51 +77,9 @@ exit:
   ret void
 }
 
+; Unit-stride speculation isn't even attempted, so no VPlan dumps.
+; CHECK-NOT: @basic_optsize
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fhahn wrote:

How do the scripts handle this? If there are any issues,  it may be better to move to a separate file

https://github.com/llvm/llvm-project/pull/182595