[Bug other/51125] FAIL: g++.dg/tm/pr45940-3.C

[patrick.marlier at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51125

--- Comment #5 from Patrick Marlier <patrick.marlier at gmail dot com> 2011-11-19 17:42:20 UTC ---
** NOT RELATED TO BUG **
In http://gcc.gnu.org/ml/gcc-patches/2011-11/msg00969.html, the patch shows
changes to tree-ssa-reassoc.c but not committed or part of Changelog.
But the problem is definitely not here.

Patrick.

Index: tree-ssa-reassoc.c
===================================================================
--- tree-ssa-reassoc.c.orig    2011-11-07 15:56:25.000000000 +0100
+++ tree-ssa-reassoc.c    2011-11-07 16:12:35.000000000 +0100
@@ -2869,6 +2869,12 @@  reassociate_bb (basic_block bb)
       rhs1 = gimple_assign_rhs1 (stmt);
       rhs2 = gimple_assign_rhs2 (stmt);

+      /* We don't want to destroy reduction like patterns
+         with reassociation, simply don't start at such
+         statements.  */
+      if (is_phi_for_stmt (stmt, rhs1) || is_phi_for_stmt (stmt, rhs2))
+        continue;
+
       /* For non-bit or min/max operations we can't associate
          all types.  Verify that here.  */
       if (rhs_code != BIT_IOR_EXPR