gcc/testsuite/jit.dg/test-error-dereference-field-of-non-pointer.c

#include <stdlib.h>
#include <stdio.h>

#include "libgccjit.h"

#include "harness.h"

struct foo
{
  int x;
  int y;
};

void
create_code (gcc_jit_context *ctxt, void *user_data)
{
  /* Let's try to inject the equivalent of:
     void
     test_bogus_dereference ()
     {
        struct foo tmp;
        tmp->x = tmp->y;
     }
     i.e. where tmp is *not* a pointer.
  */
  gcc_jit_type *void_type =
    gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_VOID);
  gcc_jit_type *int_type =
    gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_INT);

  /* Map "struct foo".  */
  gcc_jit_field *x =
    gcc_jit_context_new_field (ctxt,
                               NULL,
                               int_type,
                               "x");
  gcc_jit_field *y =
    gcc_jit_context_new_field (ctxt,
                               NULL,
                               int_type,
                               "y");
  gcc_jit_field *foo_fields[] = {x, y};
  gcc_jit_struct *struct_foo =
    gcc_jit_context_new_struct_type (ctxt, NULL, "foo", 2, foo_fields);

  /* Build the test function.  */
  gcc_jit_function *test_fn =
    gcc_jit_context_new_function (ctxt, NULL,
                                  GCC_JIT_FUNCTION_EXPORTED,
                                  void_type,
                                  "test_bogus_dereference",
                                  0, NULL,
                                  0);
  gcc_jit_lvalue *tmp =
    gcc_jit_function_new_local (test_fn, NULL,
				gcc_jit_struct_as_type (struct_foo),
				"tmp");

  gcc_jit_block *block = gcc_jit_function_new_block (test_fn, NULL);

  /* Erroneous: tmp->x = ... */
  gcc_jit_lvalue *lvalue =
    gcc_jit_rvalue_dereference_field (
      gcc_jit_lvalue_as_rvalue (tmp),
      NULL,
      x);

  /* Erroneous: ... = tmp->y; */
  gcc_jit_rvalue *rvalue =
    gcc_jit_lvalue_as_rvalue (
      gcc_jit_rvalue_dereference_field (
	gcc_jit_lvalue_as_rvalue (tmp),
	NULL,
	y));

  gcc_jit_block_add_assignment (
    block,
    NULL,
    lvalue, rvalue);

  gcc_jit_block_end_with_void_return (block, NULL);
}

void
verify_code (gcc_jit_context *ctxt, gcc_jit_result *result)
{
  CHECK_VALUE (result, NULL);

  /* Verify that the correct error message was emitted.  */
  CHECK_STRING_VALUE (gcc_jit_context_get_first_error (ctxt),
		      ("gcc_jit_rvalue_dereference_field:"
		       " dereference of non-pointer tmp (type: struct foo)"
		       " when accessing ->x"));
}