[Bug tree-optimization/51879] Missed tail merging with non-const/pure calls

[vries at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51879

--- Comment #11 from vries at gcc dot gnu.org 2012-04-27 06:35:30 UTC ---
All listed examples fixed in r186894. 

Todo: follow-up with fix for:
...
struct S { int i; };
extern struct S foo (void);
extern int foo2 (void);
struct S s;
int bar (int c) {
  int r;
  if (c)
    {
      s = foo ();
      r = foo2 ();
    }
  else
    {
      s = foo ();
      r = foo2 ();
    }
  return r;
}
...