[llvm] [llvm-exegesis] [AArch64] Resolving "not all operands are initialized by snippet generator" (PR #142529)

[Lakshay Kumar via llvm-commits]

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@@ -276,6 +276,14 @@ static Error randomizeMCOperand(const LLVMState &State,
     AssignedValue = MCOperand::createReg(randomBit(AllowedRegs));
     break;
   }
+  /// Omit unknown and pc-relative operands to imm value based on the instruction
+  // TODO: Neccesity of AArch64 guard ?
+#ifdef __aarch64__
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lakshayk-nv wrote:

Sure, removed the guard. 
There aren't any regression posed by this PR changes, checked on `--mcpu=neoverse-v2` and `znver4` by `ninja check-llvm`.

[For completeness] 
x86 instruction can throw `unimplemented operand type OPERAND_UNKNOWN` from `not all operands are initalized by snippet generator`but not observed till now.

https://github.com/llvm/llvm-project/pull/142529