(ashlsi_16, lshrsi_16): Disable pattern for TARGET_68060; this special

case is not faster for that cpu.

From-SVN: r11818

gcc/config/m68k/m68k.md

@@ -4210,13 +4210,13 @@
     FAIL;
 } ")
 
-;; On all 68k models, this makes faster code in a special case.
+;; On most 68k models, this makes faster code in a special case.
 
-(define_insn ""
+(define_insn "ashlsi_16"
   [(set (match_operand:SI 0 "register_operand" "=d")
 	(ashift:SI (match_operand:SI 1 "register_operand" "0")
 		   (const_int 16)))]
-  ""
+  "!TARGET_68060"
   "*
 {
   CC_STATUS_INIT;
@@ -4228,7 +4228,7 @@
 
 ;; On the 68000, this makes faster code in a special case.
 
-(define_insn ""
+(define_insn "ashlsi_17_24"
   [(set (match_operand:SI 0 "register_operand" "=d")
 	(ashift:SI (match_operand:SI 1 "register_operand" "0")
 		   (match_operand:SI 2 "const_int_operand" "n")))]
@@ -4574,13 +4574,13 @@
   return \"add%.l %0,%0\;subx%.l %0,%0\;neg%.l %0\";
 }")
 
-;; On all 68k models, this makes faster code in a special case.
+;; On most 68k models, this makes faster code in a special case.
 
 (define_insn "lshrsi_16"
   [(set (match_operand:SI 0 "register_operand" "=d")
 	(lshiftrt:SI (match_operand:SI 1 "register_operand" "0")
 		     (const_int 16)))]
-  ""
+  "!TARGET_68060"
   "*
 {
   CC_STATUS_INIT;