re PR target/41081 (redundant ZERO_EXTENDs)

	PR target/41081
	* config/rs6000/rs6000.md (rotlsi3_64, ashlsi3_64, lshrsi3_64,
	ashrsi3_64): New.

From-SVN: r151025

gcc/ChangeLog

 2009-08-23  Alan Modra  <amodra@bigpond.net.au>
 
 	PR target/41081
+	* config/rs6000/rs6000.md (rotlsi3_64, ashlsi3_64, lshrsi3_64,
+	ashrsi3_64): New.
+
+2009-08-23  Alan Modra  <amodra@bigpond.net.au>
+
+	PR target/41081
 	* fwprop.c (try_fwprop_subst): Allow multiple sets.
 	(get_reg_use_in): New function.
 	(forward_propagate_subreg): Propagate through subreg of zero_extend

gcc/config/rs6000/rs6000.md

@@ -4367,6 +4367,17 @@
    {rlinm|rlwinm} %0,%1,%h2,0xffffffff"
   [(set_attr "type" "var_shift_rotate,integer")])
 
+(define_insn "*rotlsi3_64"
+  [(set (match_operand:DI 0 "gpc_reg_operand" "=r,r")
+  	(zero_extend:DI
+	    (rotate:SI (match_operand:SI 1 "gpc_reg_operand" "r,r")
+		       (match_operand:SI 2 "reg_or_cint_operand" "r,i"))))]
+  "TARGET_64BIT"
+  "@
+   {rlnm|rlwnm} %0,%1,%2,0xffffffff
+   {rlinm|rlwinm} %0,%1,%h2,0xffffffff"
+  [(set_attr "type" "var_shift_rotate,integer")])
+
 (define_insn "*rotlsi3_internal2"
   [(set (match_operand:CC 0 "cc_reg_operand" "=x,x,?y,?y")
 	(compare:CC (rotate:SI (match_operand:SI 1 "gpc_reg_operand" "r,r,r,r")
@@ -4711,6 +4722,17 @@
    {sli|slwi} %0,%1,%h2"
   [(set_attr "type" "var_shift_rotate,shift")])
 
+(define_insn "*ashlsi3_64"
+  [(set (match_operand:DI 0 "gpc_reg_operand" "=r,r")
+  	(zero_extend:DI
+	    (ashift:SI (match_operand:SI 1 "gpc_reg_operand" "r,r")
+		       (match_operand:SI 2 "reg_or_cint_operand" "r,i"))))]
+  "TARGET_POWERPC64"
+  "@
+   {sl|slw} %0,%1,%2
+   {sli|slwi} %0,%1,%h2"
+  [(set_attr "type" "var_shift_rotate,shift")])
+
 (define_insn ""
   [(set (match_operand:CC 0 "cc_reg_operand" "=x,x,?y,?y")
 	(compare:CC (ashift:SI (match_operand:SI 1 "gpc_reg_operand" "r,r,r,r")
@@ -4948,6 +4970,17 @@
   {sri|srwi} %0,%1,%h2"
   [(set_attr "type" "integer,var_shift_rotate,shift")])
 
+(define_insn "*lshrsi3_64"
+  [(set (match_operand:DI 0 "gpc_reg_operand" "=r,r")
+  	(zero_extend:DI
+	    (lshiftrt:SI (match_operand:SI 1 "gpc_reg_operand" "r,r")
+			 (match_operand:SI 2 "reg_or_cint_operand" "r,i"))))]
+  "TARGET_POWERPC64"
+  "@
+  {sr|srw} %0,%1,%2
+  {sri|srwi} %0,%1,%h2"
+  [(set_attr "type" "var_shift_rotate,shift")])
+
 (define_insn ""
   [(set (match_operand:CC 0 "cc_reg_operand" "=x,x,x,?y,?y,?y")
 	(compare:CC (lshiftrt:SI (match_operand:SI 1 "gpc_reg_operand" "r,r,r,r,r,r")
@@ -5376,6 +5409,17 @@
    {srai|srawi} %0,%1,%h2"
   [(set_attr "type" "var_shift_rotate,shift")])
 
+(define_insn "*ashrsi3_64"
+  [(set (match_operand:DI 0 "gpc_reg_operand" "=r,r")
+  	(sign_extend:DI
+	    (ashiftrt:SI (match_operand:SI 1 "gpc_reg_operand" "r,r")
+			 (match_operand:SI 2 "reg_or_cint_operand" "r,i"))))]
+  "TARGET_POWERPC64"
+  "@
+   {sra|sraw} %0,%1,%2
+   {srai|srawi} %0,%1,%h2"
+  [(set_attr "type" "var_shift_rotate,shift")])
+
 (define_insn ""
   [(set (match_operand:CC 0 "cc_reg_operand" "=x,x,?y,?y")
 	(compare:CC (ashiftrt:SI (match_operand:SI 1 "gpc_reg_operand" "r,r,r,r")