[Bug rtl-optimization/103908] gcc 7.5.0 (and earlier) miscompile asm goto in O1 on x86-64

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103908

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The attached testcase is:

int a, b;

void foo(void)
{
  if (a) {
    b = 1;
    asm goto ("call 0x0\n\t" : : : : next1);
next1:;
  } else {
    b = 1;
    asm goto ("call 0x1\n\t" : : : : next2);
next2:;
  }
}