[Bug rtl-optimization/44194] struct returned by value generates useless stores

[eraman at google dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44194

Easwaran Raman <eraman at google dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |eraman at google dot com

--- Comment #13 from Easwaran Raman <eraman at google dot com> 2011-04-15 19:18:25 UTC ---
Richard, did you mean to write

static bool
can_escape (tree expr)
{
  tree base;
  if (!expr)
    return true;
  base = get_base_address (expr);
  if (DECL_P (base)
      && (!may_be_aliased (base)
          && !pt_solution_includes (&cfun->gimple_df->escaped, base)))
    return false;
  return true;
}

Only case when we know it doesn't escape is if bas is a DECL_P and is not in
cfun->gimple_df->escaped and not aliased, right? Actually, I'm wondering if it
is sufficient to test just
DECL_P (base) && !pt_solution_includes (&cfun->gimple_df->escaped, base).