re PR target/54236 ([SH] Improve addc and subc insn utilization)

gcc/
	PR target/54236
	* config/sh/sh.md (*round_int_even): Reject pattern if operands[0] and
	operands[1] are the same.

gcc/testsuite/
	PR target/54236
	* gcc.target/sh/pr54236-2.c: Fix typo in comment.

From-SVN: r223479

gcc/ChangeLog

+2015-05-21  Oleg Endo  <olegendo@gcc.gnu.org>
+
+	PR target/54236
+	* config/sh/sh.md (*round_int_even): Reject pattern if operands[0] and
+	operands[1] are the same.
+
 2015-05-21  Ilya Enkovich  <enkovich.gnu@gmail.com>
 
 	PR middle-end/66221

gcc/config/sh/sh.md

@@ -2011,7 +2011,8 @@
 	(and:SI (plus:SI (match_operand:SI 1 "arith_reg_operand")
 			 (const_int 1))
 		(const_int -2)))]
-  "TARGET_SH1 && !TARGET_SH2A && can_create_pseudo_p ()"
+  "TARGET_SH1 && !TARGET_SH2A && can_create_pseudo_p ()
+   && !reg_overlap_mentioned_p (operands[0], operands[1])"
   "#"
   "&& 1"
   [(set (match_dup 0) (const_int -2))

gcc/testsuite/ChangeLog

+2015-05-21  Oleg Endo  <olegendo@gcc.gnu.org>
+
+	PR target/54236
+	* gcc.target/sh/pr54236-2.c: Fix typo in comment.
+
 2015-05-21  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
 
 	PR target/65937

gcc/testsuite/gcc.target/sh/pr54236-2.c

@@ -133,7 +133,7 @@ int
 test_016 (int a, int b, int c, int d)
 {
   // non-SH2A: 1x add #1, 1x mov #-2, 1x and
-  // SH2A: 1x add #1, 1x blcr #0
+  // SH2A: 1x add #1, 1x bclr #0
   return a + (a & 1);
 }