[llvm] [RISCV] Move RISCVInsertVSETVLI to after phi elimination (PR #91440)

[Philip Reames via llvm-commits]

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@@ -40,14 +40,16 @@
 ; CHECK-NEXT:       Finalize ISel and expand pseudo-instructions
 ; CHECK-NEXT:       Local Stack Slot Allocation
 ; CHECK-NEXT:       RISC-V Pre-RA pseudo instruction expansion pass
-; CHECK-NEXT:       RISC-V Insert VSETVLI pass
 ; CHECK-NEXT:       RISC-V Insert Read/Write CSR Pass
 ; CHECK-NEXT:       RISC-V Insert Write VXRM Pass
 ; CHECK-NEXT:       Init Undef Pass
 ; CHECK-NEXT:       Eliminate PHI nodes for register allocation
+; CHECK-NEXT:       MachineDominator Tree Construction
+; CHECK-NEXT:       Slot index numbering
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preames wrote:

Minor, but it looks like maybe one of either two address or fast alloc isn't preserving an analysis that it probably could.  

https://github.com/llvm/llvm-project/pull/91440