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path: root/deps/lightening/tests/link-register.c
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#include "test.h"

static void
run_test(jit_state_t *j, uint8_t *arena_base, size_t arena_size)
{
  jit_begin(j, arena_base, arena_size);
  size_t align = jit_enter_jit_abi(j, 0, 0, 0);
  jit_load_args_1(j, jit_operand_gpr (JIT_OPERAND_ABI_POINTER, JIT_R0));

  jit_reloc_t call_tramp = jit_jmp (j);

  void *tramp = jit_address (j);
  jit_pop_link_register (j);
  jit_movr (j, JIT_R0, JIT_LR);
  jit_leave_jit_abi(j, 0, 0, align);
  jit_retr (j, JIT_R0);

  jit_patch_here (j, call_tramp);
  jit_jmpi_with_link (j, tramp);

  void *expected_link = jit_address_to_function_pointer (jit_address (j));

  size_t size = 0;
  void* ret = jit_end(j, &size);

  void* (*f)(void) = ret;

  ASSERT(f() == expected_link);
}

int
main (int argc, char *argv[])
{
  return main_helper(argc, argv, run_test);
}