m68hc11.c (m68hc11_gen_movhi): Don't rely on REG_WAS_0 notes as they are boggus.

	* config/m68hc11/m68hc11.c (m68hc11_gen_movhi): Don't rely on REG_WAS_0
	notes as they are boggus.
	(m68hc11_gen_movqi): Likewise.

From-SVN: r65107

gcc/ChangeLog

 2003-03-31  Stephane Carrez  <stcarrez@nerim.fr>
 
+	* config/m68hc11/m68hc11.c (m68hc11_gen_movhi): Don't rely on REG_WAS_0
+	notes as they are boggus.
+	(m68hc11_gen_movqi): Likewise.
+
+2003-03-31  Stephane Carrez  <stcarrez@nerim.fr>
+
 	* config/m68hc11/m68hc11.c (expand_prologue): For an interrupt handler
 	save the soft registers after the frame pointer so that gdb can unwind
 	the frame more easily.

gcc/config/m68hc11/m68hc11.c

@@ -3271,7 +3271,8 @@ m68hc11_gen_movhi (insn, operands)
 	{
 	  if (SP_REG_P (operands[0]))
 	    output_asm_insn ("lds\t%1", operands);
-	  else if (!D_REG_P (operands[0])
+	  else if (0 /* REG_WAS_0 note is boggus;  don't rely on it.  */
+                   && !D_REG_P (operands[0])
                    && GET_CODE (operands[1]) == CONST_INT
                    && (INTVAL (operands[1]) == 1 || INTVAL (operands[1]) == -1)
                    && find_reg_note (insn, REG_WAS_0, 0))
@@ -3464,7 +3465,8 @@ m68hc11_gen_movhi (insn, operands)
 	      cc_status = cc_prev_status;
 	      output_asm_insn ("tsx", operands);
 	    }
-	  else if (GET_CODE (operands[1]) == CONST_INT
+	  else if (0 /* REG_WAS_0 note is boggus;  don't rely on it.  */
+                   && GET_CODE (operands[1]) == CONST_INT
                    && (INTVAL (operands[1]) == 1 || INTVAL (operands[1]) == -1)
                    && find_reg_note (insn, REG_WAS_0, 0))
             {
@@ -3521,7 +3523,8 @@ m68hc11_gen_movhi (insn, operands)
 	      cc_status = cc_prev_status;
 	      output_asm_insn ("tsy", operands);
 	    }
-	  else if (GET_CODE (operands[1]) == CONST_INT
+	  else if (0 /* REG_WAS_0 note is boggus;  don't rely on it.  */
+                   && GET_CODE (operands[1]) == CONST_INT
                    && (INTVAL (operands[1]) == 1 || INTVAL (operands[1]) == -1)
                    && find_reg_note (insn, REG_WAS_0, 0))
             {
@@ -3770,7 +3773,8 @@ m68hc11_gen_movqi (insn, operands)
 		  output_asm_insn ("ldab\t%T0", operands);
 		}
 	    }
-	  else if (GET_CODE (operands[1]) == CONST_INT
+	  else if (0 /* REG_WAS_0 note is boggus;  don't rely on it.  */
+                   && GET_CODE (operands[1]) == CONST_INT
                    && (INTVAL (operands[1]) == 1 || INTVAL (operands[1]) == -1)
                    && find_reg_note (insn, REG_WAS_0, 0))
             {