add test for -passes

Author: optimisan

llvm/test/CodeGen/AMDGPU/enqueue-kernel.ll

@@ -1,5 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes --check-globals --include-generated-funcs
 ; RUN: opt -data-layout=A5 -amdgpu-lower-enqueued-block -S < %s | FileCheck %s
+; RUN: opt -data-layout=A5 -mtriple=amdgcn -passes=amdgpu-lower-enqueued-block -S < %s | FileCheck %s
 
 %struct.ndrange_t = type { i32 }
 %opencl.queue_t = type opaque