sh: Make *minus_plus_one work after RA

*minus_plus_one had no constraints, which meant that it could be
matched after RA with operands 0, 1 and 2 all being different.
The associated split instead requires operand 0 to be tied to
operand 1.

gcc/
	* config/sh/sh.md (*minus_plus_one): Add constraints.

diff --git a/gcc/config/sh/sh.md b/gcc/config/sh/sh.md
index 92a1efeb811f8f1d87b91ff7c22a1e6fb01a2d53..9491b49e55b681a0013591a364c5589872de589e 100644 (file)
--- a/gcc/config/sh/sh.md
+++ b/gcc/config/sh/sh.md
@@ -1642,9 +1642,9 @@
 ;; matched.  Split this up into a simple sub add sequence, as this will save
 ;; us one sett insn.
 (define_insn_and_split "*minus_plus_one"
-  [(set (match_operand:SI 0 "arith_reg_dest" "")
-       (plus:SI (minus:SI (match_operand:SI 1 "arith_reg_operand" "")
-                          (match_operand:SI 2 "arith_reg_operand" ""))
+  [(set (match_operand:SI 0 "arith_reg_dest" "=r")
+       (plus:SI (minus:SI (match_operand:SI 1 "arith_reg_operand" "0")
+                          (match_operand:SI 2 "arith_reg_operand" "r"))
                 (const_int 1)))]
   "TARGET_SH1"
   "#"