[SYCL][NFC] Add missing LIT test (#5304)

After community pulldown of llvm/llvm-project@627868263cd4   the LIT test associated to the patch didn't get to be added (or might have been deleted inadvertently. This patch is to add back the LIT test.

Author: zahiraam

clang/test/CodeGenSYCL/debug-info-kernel-variables.cpp

@@ -0,0 +1,60 @@
+// RUN: %clang_cc1 %s -o - -O0 -emit-llvm                                     \
+// RUN:            -triple spir64-unknown-unknown                             \
+// RUN:            -aux-triple x86_64-unknown-linux-gnu                       \
+// RUN:            -fsycl-is-device                                           \
+// RUN:            -finclude-default-header                                   \
+// RUN:            -debug-info-kind=limited -gno-column-info                  \
+// RUN:   | FileCheck %s
+//
+// In spir functions, validate the llvm.dbg.declare intrinsics created for
+// parameters and locals refer to the stack allocation in the alloca address
+// space.
+//
+
+#define KERNEL __attribute__((sycl_kernel))
+
+template <typename KernelName, typename KernelType>
+KERNEL void parallel_for(const KernelType &KernelFunc) {
+  KernelFunc();
+}
+
+void my_kernel(int my_param) {
+  int my_local = 0;
+  my_local = my_param;
+}
+
+int my_host() {
+  parallel_for<class K>([=]() { my_kernel(42); });
+  return 0;
+}
+
+// CHECK:      define {{.*}}spir_func void @_Z9my_kerneli(
+// CHECK-SAME    i32 %my_param
+// CHECK-SAME:   !dbg [[MY_KERNEL:![0-9]+]]
+// CHECK-SAME: {
+// CHECK:        %my_param.addr = alloca i32, align 4
+// CHECK:        %my_local = alloca i32, align 4
+// CHECK:        call void @llvm.dbg.declare(
+// CHECK-SAME:     metadata i32* %my_param.addr,
+// CHECK-SAME:     metadata [[MY_PARAM:![0-9]+]],
+// CHECK-SAME:     metadata !DIExpression(DW_OP_constu, 4, DW_OP_swap, DW_OP_xderef)
+// CHECK-SAME:     )
+// CHECK:        call void @llvm.dbg.declare(
+// CHECK-SAME:     metadata i32* %my_local,
+// CHECK-SAME:     metadata [[MY_LOCAL:![0-9]+]],
+// CHECK-SAME:     metadata !DIExpression(DW_OP_constu, 4, DW_OP_swap, DW_OP_xderef)
+// CHECK-SAME:     )
+// CHECK:      }
+
+// CHECK:      [[MY_KERNEL]] = distinct !DISubprogram(
+// CHECK-SAME:   name: "my_kernel"
+// CHECK-SAME:   )
+// CHECK:      [[MY_PARAM]] = !DILocalVariable(
+// CHECK-SAME:   name: "my_param"
+// CHECK-SAME:   arg: 1
+// CHECK-SAME:   scope: [[MY_KERNEL]]
+// CHECK-SAME:   )
+// CHECK:      [[MY_LOCAL]] = !DILocalVariable(
+// CHECK-SAME:   name: "my_local"
+// CHECK-SAME:   scope: [[MY_KERNEL]]
+// CHECK-SAME:   )