[llvm] [llvm][ir]: fix llc crashes on function definitions with label parameters (PR #136285)

[Phoebe Wang via llvm-commits]

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@@ -2931,6 +2931,8 @@ void Verifier::visitFunction(const Function &F) {
           FT->getParamType(i));
     Check(Arg.getType()->isFirstClassType(),
           "Function arguments must have first-class types!", &Arg);
+    Check(!Arg.getType()->isLabelTy(),
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phoebewang wrote:

We should allow it for asm, see https://github.com/llvm/llvm-project/blob/main/llvm/test/CodeGen/X86/asm-block-labels.ll

https://github.com/llvm/llvm-project/pull/136285