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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/33512] Simple bitwise simplification missed
Date: Tue, 24 Apr 2012 08:24:00 -0000
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X-Bugzilla-Keywords: missed-optimization, patch, TREE
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33512

--- Comment #13 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-04-24 08:19:59 UTC ---
Patch which I am testing:
Index: tree-ssa-forwprop.c
===================================================================
--- tree-ssa-forwprop.c    (revision 186755)
+++ tree-ssa-forwprop.c    (working copy)
@@ -1913,10 +1913,10 @@ simplify_bitwise_binary (gimple_stmt_ite
    /* Simplify (A & B) OP0 (C & B) to (A OP0 C) & B. */
    if (def1_code == def2_code
        && def1_code == BIT_AND_EXPR
-       && operand_equal_for_phi_arg_p (gimple_assign_rhs2 (def1),
-                       gimple_assign_rhs2 (def2)))
+       && operand_equal_for_phi_arg_p (def1_arg2,
+                       def2_arg2))
     {
-      tree b = gimple_assign_rhs2 (def1);
+      tree b = def1_arg2;
       tree a = def1_arg1;
       tree c = def2_arg1;
       tree inner = fold_build2 (code, TREE_TYPE (arg2), a, c);

--- CUT ---
This was definitely my fault.  I tested both patches independently and forgot
to test them together.  Sorry about that.