[llvm] [RISCV][MC] Prioritize features in MultiMismatchFallback (PR #215737)

[Alexander Richardson via llvm-commits]

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@@ -17,13 +17,13 @@ sfence.w.inval 0x10 # CHECK: :[[@LINE]]:1: error: invalid instruction
 
 sfence.inval.ir 0x10 # CHECK: :[[@LINE]]:1: error: invalid instruction
 
-hfence.vvma zero, a1, a2 # CHECK: :[[@LINE]]:13: error: unexpected extra operand for instruction
+hfence.vvma zero, a1, a2 # CHECK: :[[@LINE]]:1: error: instruction requires the following: 'H' (Hypervisor)
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arichardson wrote:

I had a similar change locally and I think it would be good if these tests actually enabled the features for the instructions being tested so we get the operand diagnostics rather than missing features.

https://github.com/llvm/llvm-project/pull/215737