X-Git-Url: http://git.sourceforge.jp/view?p=pf3gnuchains%2Fgcc-fork.git;a=blobdiff_plain;f=gcc%2Ftree-ssa-reassoc.c;h=a4118c923392ba9ad44cf19515c8f29b85f1fb85;hp=200088d7dd43871f2b10929e5e6ea49f40204fed;hb=4251ed760f214b43bb43729abcd0ce1feda5c173;hpb=8c7642de510f166c863daf76b3779aa2dc6b6a34

diff --git a/gcc/tree-ssa-reassoc.c b/gcc/tree-ssa-reassoc.c
index 200088d7dd4..a4118c92339 100644
--- a/gcc/tree-ssa-reassoc.c
+++ b/gcc/tree-ssa-reassoc.c
@@ -857,6 +857,18 @@ rewrite_expr_tree (tree stmt, unsigned int opindex,
 	  oe1->op = temp.op;
 	  oe1->rank= temp.rank;
 	}
+      else if ((oe1->rank == oe3->rank
+		&& oe2->rank != oe3->rank)
+	       || (is_phi_for_stmt (stmt, oe2->op)
+		   && !is_phi_for_stmt (stmt, oe1->op)
+		   && !is_phi_for_stmt (stmt, oe3->op)))
+	{
+	  struct operand_entry temp = *oe2;
+	  oe2->op = oe1->op;
+	  oe2->rank = oe1->rank;
+	  oe1->op = temp.op;
+	  oe1->rank= temp.rank;
+	}
     }
 
   /* The final recursion case for this function is that you have