rtl.h (reg_info): Add an nregs field.

gcc/
	* rtl.h (reg_info): Add an nregs field.
	(REG_NREGS): Use it.
	(SET_REGNO_RAW): Delete.
	(set_regno_raw): New function.
	* regs.h (END_HARD_REGNO): Make equivalent to END_REGNO.
	(END_REGNO): Redefine in terms of REG_NREGS.
	* read-rtl.c (read_rtx_code): Call set_regno_raw instead of
	SET_REGNO_RAW.
	* emit-rtl.c (set_mode_and_regno): Likewise.
	* df-scan.c (df_ref_change_reg_with_loc): Use set_mode_and_regno
	instead of SET_REGNO_RAW.

From-SVN: r223342

gcc/ChangeLog

 2015-05-19  Richard Sandiford  <richard.sandiford@arm.com>
 
+	* rtl.h (reg_info): Add an nregs field.
+	(REG_NREGS): Use it.
+	(SET_REGNO_RAW): Delete.
+	(set_regno_raw): New function.
+	* regs.h (END_HARD_REGNO): Make equivalent to END_REGNO.
+	(END_REGNO): Redefine in terms of REG_NREGS.
+	* read-rtl.c (read_rtx_code): Call set_regno_raw instead of
+	SET_REGNO_RAW.
+	* emit-rtl.c (set_mode_and_regno): Likewise.
+	* df-scan.c (df_ref_change_reg_with_loc): Use set_mode_and_regno
+	instead of SET_REGNO_RAW.
+
+2015-05-19  Richard Sandiford  <richard.sandiford@arm.com>
+
 	* rtl.h (PUT_MODE_RAW): New macro.
 	(PUT_REG_NOTE_KIND): Use it.
 	(set_mode_and_regno): Declare.

gcc/df-scan.c

@@ -1930,7 +1930,7 @@ df_ref_change_reg_with_loc (rtx loc, unsigned int new_regno)
 				    DF_REG_EQ_USE_GET (new_regno),
 				    new_regno, loc);
     }
-  SET_REGNO_RAW (loc, new_regno);
+  set_mode_and_regno (loc, GET_MODE (loc), new_regno);
 }
 
 

gcc/emit-rtl.c

@@ -435,8 +435,11 @@ gen_blockage (void)
 void
 set_mode_and_regno (rtx x, machine_mode mode, unsigned int regno)
 {
+  unsigned int nregs = (HARD_REGISTER_NUM_P (regno)
+			? hard_regno_nregs[regno][mode]
+			: 1);
   PUT_MODE_RAW (x, mode);
-  SET_REGNO_RAW (x, regno);
+  set_regno_raw (x, regno, nregs);
 }
 
 /* Generate a new REG rtx.  Make sure ORIGINAL_REGNO is set properly, and

gcc/read-rtl.c

@@ -1349,7 +1349,7 @@ read_rtx_code (const char *code_name)
       case 'r':
 	read_name (&name);
 	validate_const_int (name.string);
-	SET_REGNO_RAW (return_rtx, atoi (name.string));
+	set_regno_raw (return_rtx, atoi (name.string), 1);
 	REG_ATTRS (return_rtx) = NULL;
 	break;
 

gcc/regs.h

@@ -288,11 +288,11 @@ end_hard_regno (machine_mode mode, unsigned int regno)
 
 /* Likewise for hard register X.  */
 
-#define END_HARD_REGNO(X) end_hard_regno (GET_MODE (X), REGNO (X))
+#define END_HARD_REGNO(X) END_REGNO (X)
 
 /* Likewise for hard or pseudo register X.  */
 
-#define END_REGNO(X) (HARD_REGISTER_P (X) ? END_HARD_REGNO (X) : REGNO (X) + 1)
+#define END_REGNO(X) (REGNO (X) + REG_NREGS (X))
 
 /* Add to REGS all the registers required to store a value of mode MODE
    in register REGNO.  */

gcc/rtl.h

@@ -210,7 +210,9 @@ struct GTY(()) reg_info {
   /* The value of REGNO.  */
   unsigned int regno;
 
-  unsigned int unused : 32;
+  /* The value of REG_NREGS.  */
+  unsigned int nregs : 8;
+  unsigned int unused : 24;
 
   /* The value of REG_ATTRS.  */
   reg_attrs *attrs;
@@ -1712,15 +1714,11 @@ inline rtx_insn *JUMP_LABEL_AS_INSN (const rtx_insn *insn)
    be used on RHS.  Use SET_REGNO to change the value.  */
 #define REGNO(RTX) (rhs_regno(RTX))
 #define SET_REGNO(RTX, N) (df_ref_change_reg_with_loc (RTX, N))
-#define SET_REGNO_RAW(RTX, N) (REG_CHECK (RTX)->regno = N)
 
 /* Return the number of consecutive registers in a REG.  This is always
    1 for pseudo registers and is determined by HARD_REGNO_NREGS for
    hard registers.  */
-#define REG_NREGS(RTX) \
-  (REGNO (RTX) < FIRST_PSEUDO_REGISTER \
-   ? (unsigned int) hard_regno_nregs[REGNO (RTX)][GET_MODE (RTX)] \
-   : 1)
+#define REG_NREGS(RTX) (REG_CHECK (RTX)->nregs)
 
 /* ORIGINAL_REGNO holds the number the register originally had; for a
    pseudo register turned into a hard reg this will hold the old pseudo
@@ -1735,6 +1733,15 @@ rhs_regno (const_rtx x)
   return REG_CHECK (x)->regno;
 }
 
+/* Change the REGNO and REG_NREGS of REG X to the specified values,
+   bypassing the df machinery.  */
+static inline void
+set_regno_raw (rtx x, unsigned int regno, unsigned int nregs)
+{
+  reg_info *reg = REG_CHECK (x);
+  reg->regno = regno;
+  reg->nregs = nregs;
+}
 
 /* 1 if RTX is a reg or parallel that is the current function's return
    value.  */