[Bug tree-optimization/65388] Wrong comparison in same_succ_def::equal() tree-ssa-tail-merge.c:590

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65388

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
That looks indeed.  The code is in mainline as well and I bet 4.8 has it too. 
Patch:

--- a/gcc/tree-ssa-tail-merge.c
+++ b/gcc/tree-ssa-tail-merge.c
@@ -587,7 +587,7 @@ same_succ_def::equal (const value_type *e1, const
compare_type *e2)
   if (!inverse_flags (e1, e2))
     {
       for (i = 0; i < e1->succ_flags.length (); ++i)
-       if (e1->succ_flags[i] != e1->succ_flags[i])
+       if (e1->succ_flags[i] != e2->succ_flags[i])
          return 0;
     }