re PR target/79752 (incorrect code generation for __divkf3 with -O2 -mcpu=power9)

2017-03-01  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

        PR target/79752
        * config/rs6000/rs6000.md (peephole2 for udiv/umod): Should emit
        udiv rather than div since input pattern is unsigned.

From-SVN: r245817

gcc/ChangeLog

+2017-03-01  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>
+
+	PR target/79752
+	* config/rs6000/rs6000.md (peephole2 for udiv/umod): Should emit
+	udiv rather than div since input pattern is unsigned.
+
 2017-03-01  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.c (print_reg): Warn for values of

gcc/config/rs6000/rs6000.md

@@ -3161,8 +3161,8 @@
    && ! reg_mentioned_p (operands[3], operands[1])
    && ! reg_mentioned_p (operands[3], operands[2])"
   [(set (match_dup 0)
-	(div:GPR (match_dup 1)
-		 (match_dup 2)))
+	(udiv:GPR (match_dup 1)
+		  (match_dup 2)))
    (set (match_dup 3)
 	(mult:GPR (match_dup 0)
 		  (match_dup 2)))