================
@@ -223,6 +227,10 @@ InstructionContext RecognizableInstr::insnContext() const {
insnContext = EVEX_KB_U(IC_EVEX_XD);
else if (OpPrefix == X86Local::PS)
insnContext = EVEX_KB_U(IC_EVEX);
+ else {
+ errs() << "Instruction does not use a prefix: " << Name << "\n";
+ llvm_unreachable("Invalid prefix");
----------------
KanRobert wrote:
I think if the `errs()` is followed by `llvm_unreachable`, the message will be
optimized away too in prod build.
https://github.com/llvm/llvm-project/pull/101616
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