implement feedback

Author: ro-i

llvm/lib/IR/Verifier.cpp

@@ -6367,7 +6367,7 @@ void Verifier::visitIntrinsicCall(Intrinsic::ID ID, CallBase &Call) {
           "SGPR arguments must have the `inreg` attribute", &Call);
     Check(!Call.paramHasAttr(3, Attribute::InReg),
           "VGPR arguments must not have the `inreg` attribute", &Call);
-    Check(dyn_cast_or_null<UnreachableInst>(Call.getNextNode()),
+    Check(isa_and_present<UnreachableInst>(Call.getNextNode()),
           "amdgcn_cs_chain must precede unreachable", &Call);
     break;
   }

llvm/test/Verifier/AMDGPU/intrinsic-amdgpu-cs-chain.ll

@@ -124,4 +124,4 @@ define amdgpu_cs_chain void @set_inactive_chain_arg_inreg(ptr addrspace(1) %out,
   %tmp = call i32 @llvm.amdgcn.set.inactive.chain.arg(i32 %active, i32 inreg %inactive) #0
   store i32 %tmp, ptr addrspace(1) %out
   ret void
-}
+}