rtl.def (scratch): Fix outdated comment and remove "0" field.

gcc/
	* rtl.def (scratch): Fix outdated comment and remove "0" field.
	* gengtype.c (adjust_field_rtx_def): Update accordingly.

From-SVN: r210361

gcc/ChangeLog

 2014-05-13  Richard Sandiford  <rdsandiford@googlemail.com>
 
+	* rtl.def (scratch): Fix outdated comment and remove "0" field.
+	* gengtype.c (adjust_field_rtx_def): Update accordingly.
+
+2014-05-13  Richard Sandiford  <rdsandiford@googlemail.com>
+
 	* rtl.def (DEBUG_INSN, INSN, JUMP_INSN, CALL_INSN, JUMP_TABLE_DATA)
 	(BARRIER, CODE_LABEL, NOTE): Remove first "i" field.
 	* rtl.h (rtx_def): Add insn_uid to u2 field.

gcc/gengtype.c

@@ -1249,8 +1249,6 @@ adjust_field_rtx_def (type_p t, options_p ARG_UNUSED (opt))
 		t = tree_tp, subname = "rt_tree";
 	      else if (i == REG && aindex == 1)
 		t = reg_attrs_tp, subname = "rt_reg";
-	      else if (i == SCRATCH && aindex == 0)
-		t = scalar_tp, subname = "rt_int";
 	      else if (i == SYMBOL_REF && aindex == 1)
 		t = scalar_tp, subname = "rt_int";
 	      else if (i == SYMBOL_REF && aindex == 2)

gcc/rtl.def

@@ -384,11 +384,10 @@ DEF_RTL_EXPR(PC, "pc", "", RTX_OBJ)
 DEF_RTL_EXPR(REG, "reg", "i0", RTX_OBJ)
 
 /* A scratch register.  This represents a register used only within a
-   single insn.  It will be turned into a REG during register allocation
+   single insn.  It will be replaced by a REG during register allocation
    or reload unless the constraint indicates that the register won't be
-   needed, in which case it can remain a SCRATCH.  This code is
-   marked as having one operand so it can be turned into a REG.  */
-DEF_RTL_EXPR(SCRATCH, "scratch", "0", RTX_OBJ)
+   needed, in which case it can remain a SCRATCH.  */
+DEF_RTL_EXPR(SCRATCH, "scratch", "", RTX_OBJ)
 
 /* A reference to a part of another value.  The first operand is the
    complete value and the second is the byte offset of the selected part.   */