Fix PR66168

From-SVN: r223795

gcc/ChangeLog

+2015-05-28  Thomas Preud'homme  <thomas.preudhomme@arm.com>
+
+	PR rtl-optimization/66168
+	* loop-invariant.c (move_invariant_reg): Pass dest rather than reg to
+	can_move_invariant_reg.
+
 2015-05-27  John David Anglin  <danglin@gcc.gnu.org>
 
 	PR target/66148

gcc/loop-invariant.c

@@ -1630,7 +1630,7 @@ move_invariant_reg (struct loop *loop, unsigned invno)
       if (REG_P (reg))
 	regno = REGNO (reg);
 
-      if (!can_move_invariant_reg (loop, inv, reg))
+      if (!can_move_invariant_reg (loop, inv, dest))
 	{
 	  reg = gen_reg_rtx_and_attrs (dest);
 

gcc/testsuite/ChangeLog

+2015-05-28  Thomas Preud'homme  <thomas.preudhomme@arm.com>
+
+	PR rtl-optimization/66168
+	* gcc.c-torture/compile/pr66168.c: New test.
+
 2015-05-27  Jeff Law  <law@redhat.com>
 
 	PR target/39726

gcc/testsuite/gcc.c-torture/compile/pr66168.c

+int a, b;
+
+void
+fn1 ()
+{
+  for (;;)
+    {
+      for (b = 0; b < 3; b++)
+	{
+	  char e[2];
+	  char f = e[1];
+	  a ^= f ? 1 / f : 0;
+	}
+    }
+}