New anonymous patterns to combine insert with arbitrary ashift, ashiftrt,

lshiftrt, or zero_extract.  (Based on patch from John Brooks <jbrooks@ea.com>.)
(ashlsi3): Remove extraneous operand processing.

From-SVN: r9523

gcc/config/rs6000/rs6000.md

@@ -1935,6 +1935,82 @@
   return \"{rlimi|rlwimi} %0,%3,%4,%h2,%h1\";
 }")
 
+(define_insn ""
+  [(set (zero_extract:SI (match_operand:SI 0 "gpc_reg_operand" "+r")
+			 (match_operand:SI 1 "const_int_operand" "i")
+			 (match_operand:SI 2 "const_int_operand" "i"))
+	(ashift:SI (match_operand:SI 3 "gpc_reg_operand" "r")
+		   (match_operand:SI 4 "const_int_operand" "i")))]
+  ""
+  "*
+{
+  int shift = INTVAL (operands[4]) & 31;
+  int start = INTVAL (operands[2]) & 31;
+  int size = INTVAL (operands[1]) & 31;
+
+  operands[4] = gen_rtx (CONST_INT, VOIDmode, (shift - start - size) & 31);
+  operands[1] = gen_rtx (CONST_INT, VOIDmode, start + size - 1);
+  return \"{rlimi|rlwimi} %0,%3,%4,%h2,%h1\";
+}")
+
+(define_insn ""
+  [(set (zero_extract:SI (match_operand:SI 0 "gpc_reg_operand" "+r")
+			 (match_operand:SI 1 "const_int_operand" "i")
+			 (match_operand:SI 2 "const_int_operand" "i"))
+	(ashiftrt:SI (match_operand:SI 3 "gpc_reg_operand" "r")
+		     (match_operand:SI 4 "const_int_operand" "i")))]
+  ""
+  "*
+{
+  int shift = INTVAL (operands[4]) & 31;
+  int start = INTVAL (operands[2]) & 31;
+  int size = INTVAL (operands[1]) & 31;
+
+  operands[4] = gen_rtx (CONST_INT, VOIDmode, (32 - shift - start - size) & 31);
+  operands[1] = gen_rtx (CONST_INT, VOIDmode, start + size - 1);
+  return \"{rlimi|rlwimi} %0,%3,%4,%h2,%h1\";
+}")
+
+(define_insn ""
+  [(set (zero_extract:SI (match_operand:SI 0 "gpc_reg_operand" "+r")
+			 (match_operand:SI 1 "const_int_operand" "i")
+			 (match_operand:SI 2 "const_int_operand" "i"))
+	(lshiftrt:SI (match_operand:SI 3 "gpc_reg_operand" "r")
+		     (match_operand:SI 4 "const_int_operand" "i")))]
+  ""
+  "*
+{
+  int shift = INTVAL (operands[4]) & 31;
+  int start = INTVAL (operands[2]) & 31;
+  int size = INTVAL (operands[1]) & 31;
+
+  operands[4] = gen_rtx (CONST_INT, VOIDmode, (32 - shift - start - size) & 31);
+  operands[1] = gen_rtx (CONST_INT, VOIDmode, start + size - 1);
+  return \"{rlimi|rlwimi} %0,%3,%4,%h2,%h1\";
+}")
+
+(define_insn ""
+  [(set (zero_extract:SI (match_operand:SI 0 "gpc_reg_operand" "+r")
+			 (match_operand:SI 1 "const_int_operand" "i")
+			 (match_operand:SI 2 "const_int_operand" "i"))
+	(zero_extract:SI (match_operand:SI 3 "gpc_reg_operand" "r")
+			 (match_operand:SI 4 "const_int_operand" "i")
+			 (match_operand:SI 5 "const_int_operand" "i")))]
+  "INTVAL (operands[4]) >= INTVAL (operands[1])"
+  "*
+{
+  int extract_start = INTVAL (operands[5]) & 31;
+  int extract_size = INTVAL (operands[4]) & 31;
+  int insert_start = INTVAL (operands[2]) & 31;
+  int insert_size = INTVAL (operands[1]) & 31;
+
+/* Align extract field with insert field */
+  operands[5] = gen_rtx (CONST_INT, VOIDmode,
+			 (extract_start + extract_size - insert_start - insert_size) & 31);
+  operands[1] = gen_rtx (CONST_INT, VOIDmode, insert_start + insert_size - 1);
+  return \"{rlimi|rlwimi} %0,%3,%5,%h2,%h1\";
+}")
+
 (define_insn "extzv"
   [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
 	(zero_extract:SI (match_operand:SI 1 "gpc_reg_operand" "r")
@@ -2238,7 +2314,7 @@
 			   (match_operand:SI 2 "const_int_operand" "i"))
 		(match_operand:SI 3 "mask_operand" "L")))]
   "includes_lshift_p (operands[2], operands[3])"
-  "{rlinm|rlwinm} %0,%h1,%h2,%m3,%M3")
+  "{rlinm|rlwinm} %0,%1,%h2,%m3,%M3")
 
 (define_insn ""
   [(set (match_operand:CC 0 "cc_reg_operand" "=x")
@@ -2249,7 +2325,7 @@
 	 (const_int 0)))
    (clobber (match_scratch:SI 4 "=r"))]
   "includes_lshift_p (operands[2], operands[3])"
-  "{rlinm.|rlwinm.} %4,%h1,%h2,%m3,%M3"
+  "{rlinm.|rlwinm.} %4,%1,%h2,%m3,%M3"
   [(set_attr "type" "delayed_compare")])
 
 (define_insn ""
@@ -2262,7 +2338,7 @@
    (set (match_operand:SI 0 "gpc_reg_operand" "=r")
 	(and:SI (ashift:SI (match_dup 1) (match_dup 2)) (match_dup 3)))]
   "includes_lshift_p (operands[2], operands[3])"
-  "{rlinm.|rlwinm.} %0,%h1,%h2,%m3,%M3"
+  "{rlinm.|rlwinm.} %0,%1,%h2,%m3,%M3"
   [(set_attr "type" "delayed_compare")])
 
 ;; The AIX assembler mis-handles "sri x,x,0", so write that case as
@@ -2928,6 +3004,7 @@
     }
   DONE;
 }")
+
 (define_insn "fselsfsf4"
   [(set (match_operand:SF 0 "gpc_reg_operand" "=f")
 	(if_then_else:SF (ge (match_operand:SF 1 "gpc_reg_operand" "f")
@@ -2947,6 +3024,7 @@
   "TARGET_PPC_GFXOPT && TARGET_HARD_FLOAT"
   "fsel %0,%1,%2,%3"
   [(set_attr "type" "fp")])
+
 (define_insn "negdf2"
   [(set (match_operand:DF 0 "gpc_reg_operand" "=f")
 	(neg:DF (match_operand:DF 1 "gpc_reg_operand" "f")))]
@@ -3173,6 +3251,7 @@
     }
   DONE;
 }")
+
 (define_insn "fseldfdf4"
   [(set (match_operand:DF 0 "gpc_reg_operand" "=f")
 	(if_then_else:DF (ge (match_operand:DF 1 "gpc_reg_operand" "f")
@@ -3182,6 +3261,7 @@
   "TARGET_PPC_GFXOPT && TARGET_HARD_FLOAT"
   "fsel %0,%1,%2,%3"
   [(set_attr "type" "fp")])
+
 (define_insn "fselsfdf4"
   [(set (match_operand:DF 0 "gpc_reg_operand" "=f")
 	(if_then_else:DF (ge (match_operand:SF 1 "gpc_reg_operand" "f")