[Bug lto/61969] [4.8/4.9/5 Regression] wrong code by LTO on i?86-linux-gnu (affecting trunk, 4.9.x, and 4.8.x)

[andi-gcc at firstfloor dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61969

--- Comment #5 from Andi Kleen <andi-gcc at firstfloor dot org> ---
func_52 disappears during/after nrv:

in 173t.nrv:

;; Function func_52 (func_52, funcdef_no=86, decl_uid=2858, cgraph_uid=54,
symbol_order=1152)

func_52 (uint32_t p_53)
{
  extern const struct S0 l_55 = {.f0=4, .f1=40290, .f2=10, .f3=4} [value-expr:
<retval>];

  <bb 2>:
  return <retval>;

}

in 174t.optimized

;; Function func_52 (func_52, funcdef_no=86, decl_uid=2858, cgraph_uid=54,
symbol_order=1152)

func_52 (uint32_t p_53)
{
  <bb 2>:
  return <retval>;

}