craig.topper added inline comments.

================
Comment at: clang/include/clang/Basic/riscv_vector.td:2640
+          llvm::Value *VOperand = Ops[2];
+          assert(isa<ConstantInt>(IndexOperand));
+
----------------
Drop this assert


================
Comment at: clang/include/clang/Basic/riscv_vector.td:2644
+          unsigned MaxIndex = 
cast<StructType>(VTupleOperand->getType())->getNumElements();
+          Index = std::min(Index, MaxIndex);
+
----------------
Does this min do anything?

I didn't think about it in the previous patch, but if you're trying to clip it 
should be `std::min(Index, MaxIndex-1)`


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D147917/new/

https://reviews.llvm.org/D147917

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