s390.c (addr_generation_dependency_p): Handle SUBREG and STRICT_LOW_PART within SET_DEST.

	* config/s390/s390.c (addr_generation_dependency_p): Handle SUBREG
	and STRICT_LOW_PART within SET_DEST.
	* config/s390/s390.md ("*extractqi", "*extracthi"): New insns with
	splitters, replacing pre-reload splitters.
	("*zero_extendhisi2_31", "*zero_extendqisi2_31",
	"*zero_extendqihi2_31"): New insns.
	("*zero_extendqihi2_64"): Do not clobber CC.

From-SVN: r57309

gcc/ChangeLog

+2002-09-19  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* config/s390/s390.c (addr_generation_dependency_p): Handle SUBREG 
+	and STRICT_LOW_PART within SET_DEST.
+	* config/s390/s390.md ("*extractqi", "*extracthi"): New insns with
+	splitters, replacing pre-reload splitters.
+	("*zero_extendhisi2_31", "*zero_extendqisi2_31", 
+	"*zero_extendqihi2_31"): New insns.
+	("*zero_extendqihi2_64"): Do not clobber CC.
+
 2002-09-18  Devang Patel  <dpatel@apple.com>
 
 	* cp/cp-tree.h: New prototype for walk_vtabls().        

gcc/config/s390/s390.c

@@ -2812,7 +2812,11 @@ addr_generation_dependency_p (dep_rtx, insn)
   if (GET_CODE (dep_rtx) == SET)
     {
       target = SET_DEST (dep_rtx);
-      
+      if (GET_CODE (target) == STRICT_LOW_PART)
+	target = XEXP (target, 0);
+      while (GET_CODE (target) == SUBREG)
+	target = SUBREG_REG (target);
+
       if (GET_CODE (target) == REG)
 	{
 	  int regno = REGNO (target);

gcc/config/s390/s390.md

@@ -1931,13 +1931,16 @@
   [(set_attr "op_type" "RS")
    (set_attr "atype"   "mem")])
 
-(define_split
-  [(set (match_operand:SI 0 "register_operand" "")
-        (zero_extract:SI (match_operand:QI 1 "s_operand" "")
-                         (match_operand 2 "const_int_operand" "")
-                         (const_int 0)))]
-  "!TARGET_64BIT && !reload_completed
+(define_insn_and_split "*extractqi"
+  [(set (match_operand:SI 0 "register_operand" "=d")
+        (zero_extract:SI (match_operand:QI 1 "s_operand" "Q")
+                         (match_operand 2 "const_int_operand" "n")
+                         (const_int 0)))
+   (clobber (reg:CC 33))]
+  "!TARGET_64BIT
    && INTVAL (operands[2]) > 0 && INTVAL (operands[2]) < 8"
+  "#"
+  "&& reload_completed"
   [(parallel
     [(set (match_dup 0) (unspec:SI [(match_dup 1)] 10))
      (clobber (reg:CC 33))])
@@ -1946,15 +1949,20 @@
 {
   operands[2] = GEN_INT (32 - INTVAL (operands[2]));
   operands[1] = change_address (operands[1], QImode, 0);
-}")
+}"
+  [(set_attr "type"    "o2")
+   (set_attr "atype"   "mem")])
 
-(define_split
-  [(set (match_operand:SI 0 "register_operand" "")
-        (zero_extract:SI (match_operand:QI 1 "s_operand" "")
-                         (match_operand 2 "const_int_operand" "")
-                         (const_int 0)))]
-  "!TARGET_64BIT && !reload_completed
+(define_insn_and_split "*extracthi"
+  [(set (match_operand:SI 0 "register_operand" "=d")
+        (zero_extract:SI (match_operand:QI 1 "s_operand" "Q")
+                         (match_operand 2 "const_int_operand" "n")
+                         (const_int 0)))
+   (clobber (reg:CC 33))]
+  "!TARGET_64BIT
    && INTVAL (operands[2]) >= 8 && INTVAL (operands[2]) < 16"
+  "#"
+  "&& reload_completed"
   [(parallel
     [(set (match_dup 0) (unspec:SI [(match_dup 1)] 10))
      (clobber (reg:CC 33))])
@@ -1963,7 +1971,9 @@
 {
   operands[2] = GEN_INT (32 - INTVAL (operands[2]));
   operands[1] = change_address (operands[1], HImode, 0);
-}")
+}"
+  [(set_attr "type"    "o2")
+   (set_attr "atype"   "mem")])
 
 ;
 ; extendsidi2 instruction pattern(s).
@@ -2252,6 +2262,21 @@
   "llgh\\t%0,%1"
   [(set_attr "op_type" "RXE")
    (set_attr "atype"   "mem")])
+
+(define_insn_and_split "*zero_extendhisi2_31"
+  [(set (match_operand:SI 0 "register_operand" "=&d")
+        (zero_extend:SI (match_operand:HI 1 "memory_operand" "Q")))
+   (clobber (reg:CC 33))]
+  "!TARGET_64BIT"
+  "#"
+  "&& reload_completed"
+  [(set (match_dup 0) (const_int 0))
+   (parallel
+    [(set (strict_low_part (match_dup 2)) (match_dup 1))
+     (clobber (reg:CC 33))])]
+  "operands[2] = gen_lowpart (HImode, operands[0]);"
+  [(set_attr "type" "o2")
+   (set_attr "atype" "mem")])
  
 ;
 ; zero_extendqisi2 instruction pattern(s).
@@ -2276,6 +2301,18 @@
   "llgc\\t%0,%1"
   [(set_attr "op_type" "RXE")
    (set_attr "atype"   "mem")])
+
+(define_insn_and_split "*zero_extendqisi2_31"
+  [(set (match_operand:SI 0 "register_operand" "=&d")
+        (zero_extend:SI (match_operand:QI 1 "memory_operand" "m")))]
+  "!TARGET_64BIT"
+  "#"
+  "&& reload_completed"
+  [(set (match_dup 0) (const_int 0))
+   (set (strict_low_part (match_dup 2)) (match_dup 1))]
+  "operands[2] = gen_lowpart (QImode, operands[0]);"
+  [(set_attr "type" "o2")
+   (set_attr "atype" "mem")])
  
 ;
 ; zero_extendqihi2 instruction pattern(s).
@@ -2295,13 +2332,25 @@
 
 (define_insn "*zero_extendqihi2_64"
   [(set (match_operand:HI 0 "register_operand" "=d")
-        (zero_extend:HI (match_operand:QI 1 "memory_operand" "m")))
-   (clobber (reg:CC 33))]
+        (zero_extend:HI (match_operand:QI 1 "memory_operand" "m")))]
   "TARGET_64BIT"
   "llgc\\t%0,%1"
   [(set_attr "op_type" "RXE")
    (set_attr "atype"   "mem")])
 
+(define_insn_and_split "*zero_extendqihi2_31"
+  [(set (match_operand:HI 0 "register_operand" "=&d")
+        (zero_extend:HI (match_operand:QI 1 "memory_operand" "m")))]
+  "!TARGET_64BIT"
+  "#"
+  "&& reload_completed"
+  [(set (match_dup 0) (const_int 0))
+   (set (strict_low_part (match_dup 2)) (match_dup 1))]
+  "operands[2] = gen_lowpart (QImode, operands[0]);"
+  [(set_attr "type" "o2")
+   (set_attr "atype" "mem")])
+
+
 ;
 ; fixuns_truncdfdi2 and fix_truncdfsi2 instruction pattern(s).
 ;