Add test

Author: jofrn

llvm/test/CodeGen/AMDGPU/cc-entry.ll

@@ -0,0 +1,8 @@
+; RUN: llc -mtriple=amdgcn -mcpu=gfx1200 < %s 2>&1 | FileCheck %s
+
+define amdgpu_kernel void @entry_fn() {
+; CHECK-NOT: LLVM ERROR: invalid call to entry function
+entry:
+  call void @entry_fn()
+  ret void
+}