rs6000.md: Require operand inequality in one of the peepholes.

	* config/rs6000/rs6000.md: Require operand inequality in one
	of the peepholes.

From-SVN: r222912

gcc/ChangeLog

+2015-05-08  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* config/rs6000/rs6000.md: Require operand inequality in one
+	of the peepholes.
+
 2015-05-08  Richard Sandiford  <richard.sandiford@arm.com>
 	    Franz Sirl  <Franz.Sirl-kernel@lauterbach.com>
 

gcc/config/rs6000/rs6000.md

@@ -12051,7 +12051,8 @@
                       (match_operand 7 "" "")
                       (match_operand 8 "" "")))]
   "peep2_reg_dead_p (3, operands[0])
-   && peep2_reg_dead_p (4, operands[4])"
+   && peep2_reg_dead_p (4, operands[4])
+   && REGNO (operands[0]) != REGNO (operands[5])"
  [(set (match_dup 0) (xor:SI (match_dup 5) (match_dup 9)))
   (set (match_dup 4) (compare:CC (match_dup 0) (match_dup 10)))
   (set (pc) (if_then_else (match_dup 6) (match_dup 7) (match_dup 8)))]