[llvm] [Exegesis][RISCV] Add RISCV support for llvm-exegesis (PR #89047)

[Aiden Grossman via llvm-commits]

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@@ -200,7 +209,9 @@ static void setRegisterOperandValue(const RegisterOperandAssignment &ROV,
   if (ROV.Op->isExplicit()) {
     auto &AssignedValue = IB.getValueFor(*ROV.Op);
     if (AssignedValue.isValid()) {
-      assert(AssignedValue.isReg() && AssignedValue.getReg() == ROV.Reg);
+      // TODO don't re-assign register operands which are already "locked"
+      //  by Target in corresponding InstructionTemplate
+      // assert(AssignedValue.isReg() && AssignedValue.getReg() == ROV.Reg);
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boomanaiden154 wrote:

The TODO here should be fine, but leaving the assert in as a comment is odd. It should probably be removed with additional information added to the todo if necessary.

https://github.com/llvm/llvm-project/pull/89047