stormy16.md (pushqi): New.

2002-01-30  Andrew Haley  <aph@cambridge.redhat.com>

        * config/stormy16/stormy16.md (pushqi): New.
        (popqi): New.
        (pushhi): New.
        (pophi): New.
        (movhi): Remove stack operands.
        (movqi): Likewise.
        * config/stormy16/stormy16.h (PREDICATE_CODES): Add
        nonimmediate_nonstack_operand.
        * config/stormy16/stormy16.c (nonimmediate_nonstack_operand):
        New.
        * config/stormy16/stormy16-protos.h (nonimmediate_nonstack_operand)
        New.

From-SVN: r49394

gcc/ChangeLog

+2002-01-30  Andrew Haley  <aph@cambridge.redhat.com>
+
+        * config/stormy16/stormy16.md (pushqi): New.
+        (popqi): New.
+        (pushhi): New.
+        (pophi): New.
+        (movhi): Remove stack operands.
+        (movqi): Likewise.
+        * config/stormy16/stormy16.h (PREDICATE_CODES): Add
+        nonimmediate_nonstack_operand.
+        * config/stormy16/stormy16.c (nonimmediate_nonstack_operand): 
+        New.
+        * config/stormy16/stormy16-protos.h (nonimmediate_nonstack_operand)
+        New.
+
 2002-01-31  Jason Merrill  <jason@redhat.com>
 
 	* Makefile.in (c-parse.c): Handle .output file.

gcc/config/stormy16/stormy16-protos.h

@@ -73,6 +73,7 @@ extern int inequality_operator PARAMS ((rtx, enum machine_mode));
 extern void xstormy16_split_cbranch PARAMS ((enum machine_mode, 
 					   rtx, rtx, rtx, rtx));
 extern int  short_memory_operand PARAMS ((rtx, enum machine_mode));
+extern int  nonimmediate_nonstack_operand PARAMS ((rtx, enum machine_mode));
 extern enum reg_class xstormy16_secondary_reload_class 
   PARAMS ((enum reg_class, enum machine_mode, rtx));
 extern int  xstormy16_carry_plus_operand PARAMS ((rtx, enum machine_mode));

gcc/config/stormy16/stormy16.c

@@ -622,6 +622,17 @@ short_memory_operand (x, mode)
   return (GET_CODE (XEXP (x, 0)) != PLUS);
 }
 
+int
+nonimmediate_nonstack_operand (op, mode)
+     rtx op;
+     enum machine_mode mode;
+{
+  /* 'Q' is for pushes, 'R' for pops.  */
+  return (nonimmediate_operand (op, mode) 
+	  && ! xstormy16_extra_constraint_p (op, 'Q')
+	  && ! xstormy16_extra_constraint_p (op, 'R'));
+}
+
 /* Splitter for the 'move' patterns, for modes not directly implemeted
    by hardware.  Emit insns to copy a value of mode MODE from SRC to
    DEST.

gcc/config/stormy16/stormy16.h

@@ -3894,8 +3894,8 @@ do {									\
   {"shift_operator", {ASHIFT, ASHIFTRT, LSHIFTRT }},	\
   {"equality_operator", {EQ, NE }},			\
   {"inequality_operator", {GE, GT, LE, LT, GEU, GTU, LEU, LTU }}, \
-  {"xstormy16_ineqsi_operator", {LT, GE, LTU, GEU }},
-
+  {"xstormy16_ineqsi_operator", {LT, GE, LTU, GEU }}, \
+  {"nonimmediate_nonstack_operand", {REG, MEM}},
 /* An alias for a machine mode name.  This is the machine mode that elements of
    a jump-table should have.  */
 #define CASE_VECTOR_MODE SImode

gcc/config/stormy16/stormy16.md

@@ -72,21 +72,46 @@
 ;; :: Moves
 ;; ::
 ;; ::::::::::::::::::::
+;; push/pop qi and hi are here as separate insns rather than part of
+;; the movqi/hi patterns because we need to ensure that reload isn't
+;; passed anything it can't cope with.  Without these patterns, we
+;; might end up with
+
+;; (set (mem (post_inc (sp))) mem (post_inc (reg)))
+
+;; If, in this example, reg needs reloading, reload will read reg from
+;; the stack , adjust sp, and store reg back at what is now the wrong
+;; offset.  By using separate patterns for push and pop we ensure that
+;; insns like this one are never generated.
+
+(define_insn "pushqi"
+  [(set (mem:QI (post_inc (reg:HI 15)))
+	(match_operand:QI 0 "register_operand" "r"))]
+  ""
+  "push %0"
+  [(set_attr "psw_operand" "nop")
+   (set_attr "length" "2")])
+
+(define_insn "popqi"
+  [(set (match_operand:QI 0 "register_operand" "=r")
+	(mem:QI (pre_dec (reg:HI 15))))]
+  ""
+  "pop %0"
+  [(set_attr "psw_operand" "nop")
+   (set_attr "length" "2")])
 
 (define_expand "movqi"
-  [(set (match_operand:QI 0 "nonimmediate_operand" "")
+  [(set (match_operand:QI 0 "nonimmediate_nonstack_operand" "")
 	(match_operand:QI 1 "general_operand" ""))]
   ""
   "{ xstormy16_expand_move (QImode, operands[0], operands[1]); DONE; }")
 
 (define_insn "*movqi_internal"
-  [(set (match_operand:QI 0 "nonimmediate_operand" "=r,Q,r,m,e,e,T,r,S")
-	(match_operand:QI 1 "general_operand"       "r,r,R,e,m,i,i,i,i"))]
+  [(set (match_operand:QI 0 "nonimmediate_nonstack_operand" "=r,m,e,e,T,r,S")
+	(match_operand:QI 1 "general_operand"       "r,e,m,i,i,i,i"))]
   ""
   "@
    mov %0,%1
-   push %1
-   pop %0
    mov.b %0,%1
    mov.b %0,%1
    mov %0,%1
@@ -95,8 +120,6 @@
    mov.b %0,%1"
   [(set_attr_alternative "length" 
 	     [(const_int 2)
-	      (const_int 2)
-	      (const_int 2)
 	      (if_then_else (match_operand:QI 0 "short_memory_operand" "")
 			    (const_int 2)
 			    (const_int 4))
@@ -107,22 +130,36 @@
 	      (const_int 2)
 	      (const_int 4)
 	      (const_int 4)])
-   (set_attr "psw_operand" "0,nop,nop,0,0,0,nop,0,nop")])
+   (set_attr "psw_operand" "0,0,0,0,nop,0,nop")])
+
+(define_insn "pushhi"
+  [(set (mem:HI (post_inc (reg:HI 15)))
+	(match_operand:HI 0 "register_operand" "r"))]
+  ""
+  "push %0"
+  [(set_attr "psw_operand" "nop")
+   (set_attr "length" "2")])
+
+(define_insn "pophi"
+  [(set (match_operand:HI 0 "register_operand" "=r")
+	(mem:HI (pre_dec (reg:HI 15))))]
+  ""
+  "pop %0"
+  [(set_attr "psw_operand" "nop")
+   (set_attr "length" "2")])
 
 (define_expand "movhi"
-  [(set (match_operand:HI 0 "nonimmediate_operand" "")
+  [(set (match_operand:HI 0 "nonimmediate_nonstack_operand" "")
 	(match_operand:HI 1 "general_operand" ""))]
   ""
   "{ xstormy16_expand_move (HImode, operands[0], operands[1]); DONE; }")
 
 (define_insn "*movhi_internal"
-  [(set (match_operand:HI 0 "nonimmediate_operand" "=r,Q,r,m,e,e,T,r,S")
-	(match_operand:HI 1 "general_operand"       "r,r,R,e,m,L,L,i,i"))]
+  [(set (match_operand:HI 0 "nonimmediate_nonstack_operand" "=r,m,e,e,T,r,S")
+	(match_operand:HI 1 "general_operand"       "r,e,m,L,L,i,i"))]
   ""
   "@
    mov %0,%1
-   push %1
-   pop %0
    mov.w %0,%1
    mov.w %0,%1
    mov.w %0,%1
@@ -131,8 +168,6 @@
    mov.w %0,%1"
   [(set_attr_alternative "length" 
 	     [(const_int 2)
-	      (const_int 2)
-	      (const_int 2)
 	      (if_then_else (match_operand:QI 0 "short_memory_operand" "")
 			    (const_int 2)
 			    (const_int 4))
@@ -143,7 +178,7 @@
 	      (const_int 2)
 	      (const_int 4)
 	      (const_int 4)])
-   (set_attr "psw_operand" "0,nop,nop,0,0,0,nop,0,nop")])
+   (set_attr "psw_operand" "0,0,0,0,nop,0,nop")])
 
 (define_expand "movsi"
   [(set (match_operand:SI 0 "nonimmediate_operand" "")