gcc/testsuite/gcc.c-torture/execute/mul-sext.c

/* { dg-do run } */

typedef __INT64_TYPE__ int64_t;
typedef __INT32_TYPE__ int32_t;

/* f() was misoptimized to a single "mul.d" instruction on LA64.  */
__attribute__((noipa, noinline)) int64_t
f(int64_t a, int64_t b)
{
  return (int64_t)(int32_t)a * (int64_t)(int32_t)b;
}

int
main()
{
  int64_t a = 0x1145140000000001;
  int64_t b = 0x1919810000000001;
  if (f(a, b) != 1)
    __builtin_abort();
}