[aarch64-port-dev ] OpenJDK builds fails on AARCH64 with Ubuntu 1604

[Andrew Haley]

On 17/03/17 22:20, White, Derek wrote:

> I didn't see a code change here. Did the compiler change on Jenkins?
> Can you report the gcc version used?
> 
> Could also be change in compiler warning maybe-uninitialized (but I
> couldn't find one).

We had to fix a few of these before.  I added code like this:

static jlong as_long(LIR_Opr data) {
  jlong result;
  switch (data->type()) {
  case T_INT:
    result = (data->as_jint());
    break;
  case T_LONG:
    result = (data->as_jlong());
    break;
  default:
    ShouldNotReachHere();
    result = 0;  // unreachable
  }
  return result;
}

I hate having to do this.  We can't tell GCC that ShouldNotReachHere
is noreturn because then it doesn't generate backtrace information,
and we need that for debugging.

Andrew.