[llvm] [RISCV][TTI] Enable masked interleave access for scalable vector (PR #149981)

[Philip Reames via llvm-commits]

preames wrote:

This is another instance of:
../llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:7126: llvm::VectorizationFactor llvm::LoopVectorizationPlanner::computeBestVF(): Assertion `(BestFactor.Width == LegacyVF.Width || BestPlan.hasEarlyExit() || planContainsAdditionalSimplifications(getPlanFor(BestFactor.Width), CostCtx, OrigLoop, BestFactor.Width) || planContainsAdditionalSimplifications( getPlanFor(LegacyVF.Width), CostCtx, OrigLoop, LegacyVF.Width)) && " VPlan cost model and legacy cost model disagreed"' failed.


https://github.com/llvm/llvm-project/pull/149981