[Bug tree-optimization/61306] [4.10 Regression] wrong code at -Os and above on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61306

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
16 bit load in host endianness found at: b.3_7 = (int) load_dst_10;

at least the dumping is confusing as well ;)

But the issue seems to be that we are missing that a.0_2 and c.1_3
sign-extend.

  a.0_2 = a;
  c.1_3 = (char) a.0_2;
  c = c.1_3;
  _5 = (int) a.0_2;
  _6 = (int) c.1_3;
  b.3_7 = _6 | _5;