From: Oleg Endo <olegendo@gcc.gnu.org>
Date: Sun, 17 May 2015 21:01:29 +0000 (+0000)
Subject: re PR target/54236 ([SH] Improve addc and subc insn utilization)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f5a64dbf01a2f588cfe0b372c45d6258dfe873b8;p=gcc.git

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

gcc/
	PR target/54236
	* config/sh/sh.md (*addc_2r_t): Use ashift instead of mult.

From-SVN: r223274
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a19c15863c5..d58a616f2bc 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-05-17  Oleg Endo  <olegendo@gcc.gnu.org>
+
+	PR target/54236
+	* config/sh/sh.md (*addc_2r_t): Use ashift instead of mult.
+
 2015-05-17  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/66174
diff --git a/gcc/config/sh/sh.md b/gcc/config/sh/sh.md
index d3d7dee2863..eb6983aec97 100644
--- a/gcc/config/sh/sh.md
+++ b/gcc/config/sh/sh.md
@@ -2040,8 +2040,8 @@
 (define_insn_and_split "*addc_2r_t"
   [(set (match_operand:SI 0 "arith_reg_dest")
 	(plus:SI (match_operand 1 "treg_set_expr")
-		 (mult:SI (match_operand:SI 2 "arith_reg_operand")
-			  (const_int 2))))
+		 (ashift:SI (match_operand:SI 2 "arith_reg_operand")
+			    (const_int 1))))
    (clobber (reg:SI T_REG))]
   "TARGET_SH1 && can_create_pseudo_p ()"
   "#"
@@ -2052,8 +2052,8 @@
 
 (define_insn_and_split "*addc_2r_t"
   [(set (match_operand:SI 0 "arith_reg_dest")
-	(plus:SI (mult:SI (match_operand:SI 1 "arith_reg_operand")
-			  (const_int 2))
+	(plus:SI (ashift:SI (match_operand:SI 1 "arith_reg_operand")
+			    (const_int 1))
 		 (match_operand 2 "treg_set_expr")))
    (clobber (reg:SI T_REG))]
   "TARGET_SH1 && can_create_pseudo_p ()"