stormy16.md (negsi2): Allocate the pseudos before reload, but defer the split until after.

* config/stormy16/stormy16.md (negsi2): Allocate the pseudos
before reload, but defer the split until after.
* config/stormy16/stormy16.c (xstormy16_expand_arith): Modify
to match.

From-SVN: r66485

gcc/ChangeLog

+2003-05-05  DJ Delorie  <dj@redhat.com>
+
+	* config/stormy16/stormy16.md (negsi2): Allocate the pseudos
+	before reload, but defer the split until after.
+	* config/stormy16/stormy16.c (xstormy16_expand_arith): Modify
+	to match.
+
 2003-05-05  David Edelsohn  <edelsohn@gnu.org>
 
 	* config/rs6000/rs6000.h (ASM_CPU_SPEC): Add 440 support.

gcc/config/stormy16/stormy16.c

@@ -1873,20 +1873,13 @@ xstormy16_expand_arith (mode, code, dest, src0, src1, carry)
   int firstloop = 1;
 
   if (code == NEG)
-    {
-      rtx zero_reg = gen_reg_rtx (word_mode);
-      emit_move_insn (zero_reg, src0);
-      src0 = zero_reg;
-    }
+    emit_move_insn (src0, const0_rtx);
   
   for (i = 0; i < num_words; i++)
     {
       rtx w_src0, w_src1, w_dest;
       rtx insn;
       
-      if (code == NEG)
-	w_src0 = src0;
-      else
       w_src0 = simplify_gen_subreg (word_mode, src0, mode, 
 				    i * UNITS_PER_WORD);
       w_src1 = simplify_gen_subreg (word_mode, src1, mode, i * UNITS_PER_WORD);

gcc/config/stormy16/stormy16.md

@@ -603,11 +603,23 @@
   [(set_attr "length" "4")])
 
 (define_expand "negsi2"
-  [(set (match_operand:SI 0 "register_operand" "")
-	(neg:SI (match_operand:SI 1 "register_operand" "")))]
+  [(parallel [(set (match_operand:SI 0 "register_operand" "")
+		   (neg:SI (match_operand:SI 1 "register_operand" "")))
+	      (clobber (match_scratch:BI 2 ""))])]
+  ""
+  "{ operands[2] = gen_reg_rtx (HImode);
+     operands[3] = gen_reg_rtx (BImode); }")
+
+(define_insn_and_split "*negsi2_internal"
+  [(set (match_operand:SI 0 "register_operand" "=&r")
+	(neg:SI (match_operand:SI 1 "register_operand" "r")))
+   (clobber (match_scratch:BI 2 "=y"))]
   ""
-  "{ xstormy16_expand_arith (SImode, NEG, operands[0], const0_rtx,
-			    operands[1], gen_reg_rtx (BImode)); DONE; }")
+  "#"
+  "reload_completed"
+  [(pc)]
+  "{ xstormy16_expand_arith (SImode, NEG, operands[0], operands[0],
+			    operands[1], operands[2]); DONE; }")
 
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