[PR116336][LRA]: Add a test

  Patch for PR116234 solves given PR116366.  So the patch adds only the test
case which is very different from PR116234 one.

gcc/testsuite/ChangeLog:

	PR rtl-optimization/116336
	* gcc.dg/pr116336.c: New test.

gcc/testsuite/gcc.dg/pr116336.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -gno-statement-frontiers -fcompare-debug" } */
+
+double duk_js_execute_bytecode_duk__tv_0_0;
+double duk_double_div();
+void duk_handle_call_unprotected();
+void duk_js_execute_bytecode() {
+  double du_0;
+  long opcode_shifted;
+  switch (opcode_shifted)
+  case 2:
+    du_0 = duk_double_div();
+  duk_js_execute_bytecode_duk__tv_0_0 = du_0;
+  duk_handle_call_unprotected();
+  duk_js_execute_bytecode();
+}