[llvm] [RISCV] Run another VLOptimizer before machine SSA optimizations (PR #179377)

[Luke Lau via llvm-commits]

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@@ -100,6 +100,8 @@
 ; CHECK-NEXT:       Finalize ISel and expand pseudo-instructions
 ; CHECK-NEXT:       RISC-V Vector Peephole Optimization
 ; CHECK-NEXT:       RISC-V Fold Memory Offset
+; CHECK-NEXT:       MachineDominator Tree Construction
+; CHECK-NEXT:       RISC-V VL Optimizer
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lukel97 wrote:

If we move it before VectorPeephole can we remove the mini VL optimization transform it does there?

https://github.com/llvm/llvm-project/pull/179377