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

Closes #136144.

After the patch:
```llvm
; label-crash.ll
define void @invalid_arg_type(i32 %0) {
1:
  call void @foo(label %1)
  ret void
}

declare void @foo(label)
```
```
lambda@ubuntu22:~/test$ llc -o out.s label-crash.ll 
Function argument cannot be of label type!
label %0
ptr @foo
llc: error: 'label-crash.ll': input module cannot be verified
```

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
index 35c4d60..8afe360 100644
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -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(),
+          "Function argument cannot be of label type!", &Arg, &F);
     if (!IsIntrinsic) {
       Check(!Arg.getType()->isMetadataTy(),
             "Function takes metadata but isn't an intrinsic", &Arg, &F);