rtl.def (SYMBOL_REF): Remove middle "0" field.

gcc/
	* rtl.def (SYMBOL_REF): Remove middle "0" field.
	* rtl.h (block_symbol): Reduce number of fields to 2.
	(rtx_def): Add u2.symbol_ref_flags.
	(SYMBOL_REF_FLAGS): Use it.
	(SYMBOL_REF_DATA, SET_SYMBOL_REF_DECL, SYMBOL_REF_DECL)
	(SET_SYMBOL_REF_CONSTANT, SYMBOL_REF_CONSTANT): Lower index.
	* gengtype.c (adjust_field_rtx_def): Remove SYMBOL_REF_FLAGS handling.
	Lower index of SYMBOL_REF_DATA.
	* print-rtl.c (print_rtx): Lower index for SYMBOL_REF_DATA.
	Print SYMBOL_REF_FLAGS at the same time.
	* genattrtab.c (attr_rtx_1): Only initialize 1 "0" SYMBOL_REF field.

From-SVN: r210363

gcc/ChangeLog

 2014-05-13  Richard Sandiford  <rdsandiford@googlemail.com>
 
+	* rtl.def (SYMBOL_REF): Remove middle "0" field.
+	* rtl.h (block_symbol): Reduce number of fields to 2.
+	(rtx_def): Add u2.symbol_ref_flags.
+	(SYMBOL_REF_FLAGS): Use it.
+	(SYMBOL_REF_DATA, SET_SYMBOL_REF_DECL, SYMBOL_REF_DECL)
+	(SET_SYMBOL_REF_CONSTANT, SYMBOL_REF_CONSTANT): Lower index.
+	* gengtype.c (adjust_field_rtx_def): Remove SYMBOL_REF_FLAGS handling.
+	Lower index of SYMBOL_REF_DATA.
+	* print-rtl.c (print_rtx): Lower index for SYMBOL_REF_DATA.
+	Print SYMBOL_REF_FLAGS at the same time.
+	* genattrtab.c (attr_rtx_1): Only initialize 1 "0" SYMBOL_REF field.
+
+2014-05-13  Richard Sandiford  <rdsandiford@googlemail.com>
+
 	* rtl.def (VAR_LOCATION): Remove "i" field.
 	* rtl.h (rtx_def): Add u2.var_location_status.
 	(PAT_VAR_LOCATION_STATUS): Use it.

gcc/genattrtab.c

@@ -473,10 +473,7 @@ attr_rtx_1 (enum rtx_code code, va_list p)
 	  rt_val = rtx_alloc (code);
 	  XSTR (rt_val, 0) = arg0;
 	  if (code == SYMBOL_REF)
-	    {
-	      X0EXP (rt_val, 1) = NULL_RTX;
-	      X0EXP (rt_val, 2) = NULL_RTX;
-	    }
+	    X0EXP (rt_val, 1) = NULL_RTX;
 	}
     }
   else if (GET_RTX_LENGTH (code) == 2

gcc/gengtype.c

@@ -1250,8 +1250,6 @@ adjust_field_rtx_def (type_p t, options_p ARG_UNUSED (opt))
 	      else if (i == REG && aindex == 1)
 		t = reg_attrs_tp, subname = "rt_reg";
 	      else if (i == SYMBOL_REF && aindex == 1)
-		t = scalar_tp, subname = "rt_int";
-	      else if (i == SYMBOL_REF && aindex == 2)
 		t = symbol_union_tp, subname = "";
 	      else if (i == JUMP_TABLE_DATA && aindex >= 4)
 		t = scalar_tp, subname = "rt_int";

gcc/print-rtl.c

@@ -224,9 +224,6 @@ print_rtx (const_rtx in_rtx)
 	    int flags = SYMBOL_REF_FLAGS (in_rtx);
 	    if (flags)
 	      fprintf (outfile, " [flags %#x]", flags);
-	  }
-	else if (i == 2 && GET_CODE (in_rtx) == SYMBOL_REF)
-	  {
 	    tree decl = SYMBOL_REF_DECL (in_rtx);
 	    if (decl)
 	      print_node_brief (outfile, "", decl, dump_flags);

gcc/rtl.def

@@ -429,10 +429,9 @@ DEF_RTL_EXPR(LABEL_REF, "label_ref", "u", RTX_CONST_OBJ)
 
 /* Reference to a named label:
    Operand 0: label name
-   Operand 1: flags (see SYMBOL_FLAG_* in rtl.h)
-   Operand 2: tree from which this symbol is derived, or null.
+   Operand 1: tree from which this symbol is derived, or null.
    This is either a DECL node, or some kind of constant.  */
-DEF_RTL_EXPR(SYMBOL_REF, "symbol_ref", "s00", RTX_CONST_OBJ)
+DEF_RTL_EXPR(SYMBOL_REF, "symbol_ref", "s0", RTX_CONST_OBJ)
 
 /* The condition code register is represented, in our imagination,
    as a register holding a value that can be compared to zero.

gcc/rtl.h

@@ -211,7 +211,7 @@ union rtunion
    if SYMBOL_REF_HAS_BLOCK_INFO_P is true.  */
 struct GTY(()) block_symbol {
   /* The usual SYMBOL_REF fields.  */
-  rtunion GTY ((skip)) fld[3];
+  rtunion GTY ((skip)) fld[2];
 
   /* The block that contains this object.  */
   struct object_block *block;
@@ -362,6 +362,9 @@ struct GTY((chain_next ("RTX_NEXT (&%h)"),
     /* The INSN_UID of an RTX_INSN-class code.  */
     int insn_uid;
 
+    /* The SYMBOL_REF_FLAGS of a SYMBOL_REF.  */
+    unsigned int symbol_ref_flags;
+
     /* The PAT_VAR_LOCATION_STATUS of a VAR_LOCATION.  */
     enum var_init_status var_location_status;
 
@@ -1765,24 +1768,24 @@ do {									\
 
 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
    SYMBOL_REF_CONSTANT.  */
-#define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
+#define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 1)
 
 /* Set RTX's SYMBOL_REF_DECL to DECL.  RTX must not be a constant
    pool symbol.  */
 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
-  (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
+  (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 1) = (DECL))
 
 /* The tree (decl or constant) associated with the symbol, or null.  */
 #define SYMBOL_REF_DECL(RTX) \
-  (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
+  (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 1))
 
 /* Set RTX's SYMBOL_REF_CONSTANT to C.  RTX must be a constant pool symbol.  */
 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
-  (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
+  (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 1) = (C))
 
 /* The rtx constant pool entry for a symbol, or null.  */
 #define SYMBOL_REF_CONSTANT(RTX) \
-  (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
+  (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 1) : NULL)
 
 /* A set of flags on a symbol_ref that are, in some respects, redundant with
    information derivable from the tree decl associated with this symbol.
@@ -1791,7 +1794,9 @@ do {									\
    this information to avoid recomputing it.  Finally, this allows space for
    the target to store more than one bit of information, as with
    SYMBOL_REF_FLAG.  */
-#define SYMBOL_REF_FLAGS(RTX)	X0INT ((RTX), 1)
+#define SYMBOL_REF_FLAGS(RTX) \
+  (RTL_FLAG_CHECK1 ("SYMBOL_REF_FLAGS", (RTX), SYMBOL_REF) \
+   ->u2.symbol_ref_flags)
 
 /* These flags are common enough to be defined for all targets.  They
    are computed by the default version of targetm.encode_section_info.  */