Daily bump.

[pf3gnuchains/gcc-fork.git] / gcc / hard-reg-set.h

diff --git a/gcc/hard-reg-set.h b/gcc/hard-reg-set.h
index a4ac4d0..9823a5b 100644 (file)
--- a/gcc/hard-reg-set.h
+++ b/gcc/hard-reg-set.h
@@ -1,11 +1,12 @@
 /* Sets (bit vectors) of hard registers, and operations on them.
 /* Sets (bit vectors) of hard registers, and operations on them.

-   Copyright (C) 1987, 1992, 1994, 2000 Free Software Foundation, Inc.
+   Copyright (C) 1987, 1992, 1994, 2000, 2003, 2004, 2005, 2007, 2008, 2009,
+   2010 Free Software Foundation, Inc.

 
 This file is part of GCC
 
 GCC is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free
 
 This file is part of GCC
 
 GCC is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free

-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later

 version.
 
 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
 version.
 
 GCC is distributed in the hope that it will be useful, but WITHOUT ANY


@@ -14,12 +15,11 @@ FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.
 
 You should have received a copy of the GNU General Public License
 for more details.
 
 You should have received a copy of the GNU General Public License

-along with GCC; see the file COPYING.  If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.  */
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */

 
 #ifndef GCC_HARD_REG_SET_H
 
 #ifndef GCC_HARD_REG_SET_H

-#define GCC_HARD_REG_SET_H 
+#define GCC_HARD_REG_SET_H

 
 /* Define the type of a set of hard registers.  */
 
 
 /* Define the type of a set of hard registers.  */
 


@@ -33,22 +33,23 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 
    Note that lots of code assumes that the first part of a regset is
    the same format as a HARD_REG_SET.  To help make sure this is true,
 
    Note that lots of code assumes that the first part of a regset is
    the same format as a HARD_REG_SET.  To help make sure this is true,

-   we only try the widest integer mode (HOST_WIDE_INT) instead of all the
-   smaller types.  This approach loses only if there are a very few
-   registers and then only in the few cases where we have an array of
-   HARD_REG_SETs, so it needn't be as complex as it used to be.  */
+   we only try the widest fast integer mode (HOST_WIDEST_FAST_INT)
+   instead of all the smaller types.  This approach loses only if
+   there are very few registers and then only in the few cases where
+   we have an array of HARD_REG_SETs, so it needn't be as complex as
+   it used to be.  */

 
 

-typedef unsigned HOST_WIDE_INT HARD_REG_ELT_TYPE;
+typedef unsigned HOST_WIDEST_FAST_INT HARD_REG_ELT_TYPE;

 
 

-#if FIRST_PSEUDO_REGISTER <= HOST_BITS_PER_WIDE_INT
+#if FIRST_PSEUDO_REGISTER <= HOST_BITS_PER_WIDEST_FAST_INT

 
 #define HARD_REG_SET HARD_REG_ELT_TYPE
 
 #else
 
 #define HARD_REG_SET_LONGS \
 
 #define HARD_REG_SET HARD_REG_ELT_TYPE
 
 #else
 
 #define HARD_REG_SET_LONGS \

- ((FIRST_PSEUDO_REGISTER + HOST_BITS_PER_WIDE_INT - 1) \
-  / HOST_BITS_PER_WIDE_INT)
+ ((FIRST_PSEUDO_REGISTER + HOST_BITS_PER_WIDEST_FAST_INT - 1)  \
+  / HOST_BITS_PER_WIDEST_FAST_INT)

 typedef HARD_REG_ELT_TYPE HARD_REG_SET[HARD_REG_SET_LONGS];
 
 #endif
 typedef HARD_REG_ELT_TYPE HARD_REG_SET[HARD_REG_SET_LONGS];
 
 #endif


@@ -81,9 +82,14 @@ typedef HARD_REG_ELT_TYPE HARD_REG_SET[HARD_REG_SET_LONGS];
    IOR_COMPL_HARD_REG_SET and AND_COMPL_HARD_REG_SET
    which use the complement of the set FROM.
 
    IOR_COMPL_HARD_REG_SET and AND_COMPL_HARD_REG_SET
    which use the complement of the set FROM.
 

-   Also define GO_IF_HARD_REG_SUBSET (X, Y, TO):
-   if X is a subset of Y, go to TO.
-*/
+   Also define:
+
+   hard_reg_set_subset_p (X, Y), which returns true if X is a subset of Y.
+   hard_reg_set_equal_p (X, Y), which returns true if X and Y are equal.
+   hard_reg_set_intersect_p (X, Y), which returns true if X and Y intersect.
+   hard_reg_set_empty_p (X), which returns true if X is empty.  */
+
+#define UHOST_BITS_PER_WIDE_INT ((unsigned) HOST_BITS_PER_WIDEST_FAST_INT)

 
 #ifdef HARD_REG_SET
 
 
 #ifdef HARD_REG_SET
 


@@ -92,7 +98,7 @@ typedef HARD_REG_ELT_TYPE HARD_REG_SET[HARD_REG_SET_LONGS];
 #define CLEAR_HARD_REG_BIT(SET, BIT)  \
  ((SET) &= ~(HARD_CONST (1) << (BIT)))
 #define TEST_HARD_REG_BIT(SET, BIT)  \
 #define CLEAR_HARD_REG_BIT(SET, BIT)  \
  ((SET) &= ~(HARD_CONST (1) << (BIT)))
 #define TEST_HARD_REG_BIT(SET, BIT)  \

- ((SET) & (HARD_CONST (1) << (BIT)))
+ (!!((SET) & (HARD_CONST (1) << (BIT))))

 
 #define CLEAR_HARD_REG_SET(TO) ((TO) = HARD_CONST (0))
 #define SET_HARD_REG_SET(TO) ((TO) = ~ HARD_CONST (0))
 
 #define CLEAR_HARD_REG_SET(TO) ((TO) = HARD_CONST (0))
 #define SET_HARD_REG_SET(TO) ((TO) = ~ HARD_CONST (0))


@@ -105,14 +111,32 @@ typedef HARD_REG_ELT_TYPE HARD_REG_SET[HARD_REG_SET_LONGS];
 #define AND_HARD_REG_SET(TO, FROM) ((TO) &= (FROM))
 #define AND_COMPL_HARD_REG_SET(TO, FROM) ((TO) &= ~ (FROM))
 
 #define AND_HARD_REG_SET(TO, FROM) ((TO) &= (FROM))
 #define AND_COMPL_HARD_REG_SET(TO, FROM) ((TO) &= ~ (FROM))
 

-#define GO_IF_HARD_REG_SUBSET(X,Y,TO) if (HARD_CONST (0) == ((X) & ~(Y))) goto TO
-
-#define GO_IF_HARD_REG_EQUAL(X,Y,TO) if ((X) == (Y)) goto TO
+static inline bool
+hard_reg_set_subset_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  return (x & ~y) == HARD_CONST (0);
+}
+
+static inline bool
+hard_reg_set_equal_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  return x == y;
+}
+
+static inline bool
+hard_reg_set_intersect_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  return (x & y) != HARD_CONST (0);
+}
+
+static inline bool
+hard_reg_set_empty_p (const HARD_REG_SET x)
+{
+  return x == HARD_CONST (0);
+}

 
 #else
 
 
 #else
 

-#define UHOST_BITS_PER_WIDE_INT ((unsigned) HOST_BITS_PER_WIDE_INT)
-

 #define SET_HARD_REG_BIT(SET, BIT)             \
   ((SET)[(BIT) / UHOST_BITS_PER_WIDE_INT]      \
    |= HARD_CONST (1) << ((BIT) % UHOST_BITS_PER_WIDE_INT))
 #define SET_HARD_REG_BIT(SET, BIT)             \
   ((SET)[(BIT) / UHOST_BITS_PER_WIDE_INT]      \
    |= HARD_CONST (1) << ((BIT) % UHOST_BITS_PER_WIDE_INT))


@@ -122,10 +146,10 @@ typedef HARD_REG_ELT_TYPE HARD_REG_SET[HARD_REG_SET_LONGS];
    &= ~(HARD_CONST (1) << ((BIT) % UHOST_BITS_PER_WIDE_INT)))
 
 #define TEST_HARD_REG_BIT(SET, BIT)            \
    &= ~(HARD_CONST (1) << ((BIT) % UHOST_BITS_PER_WIDE_INT)))
 
 #define TEST_HARD_REG_BIT(SET, BIT)            \

-  ((SET)[(BIT) / UHOST_BITS_PER_WIDE_INT]      \
-   & (HARD_CONST (1) << ((BIT) % UHOST_BITS_PER_WIDE_INT)))
+  (!!((SET)[(BIT) / UHOST_BITS_PER_WIDE_INT]   \
+      & (HARD_CONST (1) << ((BIT) % UHOST_BITS_PER_WIDE_INT))))

 
 

-#if FIRST_PSEUDO_REGISTER <= 2*HOST_BITS_PER_WIDE_INT
+#if FIRST_PSEUDO_REGISTER <= 2*HOST_BITS_PER_WIDEST_FAST_INT

 #define CLEAR_HARD_REG_SET(TO)  \
 do { HARD_REG_ELT_TYPE *scan_tp_ = (TO);                       \
      scan_tp_[0] = 0;                                          \
 #define CLEAR_HARD_REG_SET(TO)  \
 do { HARD_REG_ELT_TYPE *scan_tp_ = (TO);                       \
      scan_tp_[0] = 0;                                          \


@@ -166,20 +190,32 @@ do { HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM);      \
      scan_tp_[0] |= ~ scan_fp_[0];                             \
      scan_tp_[1] |= ~ scan_fp_[1]; } while (0)
 
      scan_tp_[0] |= ~ scan_fp_[0];                             \
      scan_tp_[1] |= ~ scan_fp_[1]; } while (0)
 

-#define GO_IF_HARD_REG_SUBSET(X,Y,TO)  \
-do { HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y);       \
-     if ((0 == (scan_xp_[0] & ~ scan_yp_[0]))                  \
-        && (0 == (scan_xp_[1] & ~ scan_yp_[1])))               \
-       goto TO; } while (0)
-
-#define GO_IF_HARD_REG_EQUAL(X,Y,TO)  \
-do { HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y);       \
-     if ((scan_xp_[0] == scan_yp_[0])                          \
-        && (scan_xp_[1] == scan_yp_[1]))                       \
-       goto TO; } while (0)
+static inline bool
+hard_reg_set_subset_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  return (x[0] & ~y[0]) == 0 && (x[1] & ~y[1]) == 0;
+}
+
+static inline bool
+hard_reg_set_equal_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  return x[0] == y[0] && x[1] == y[1];
+}
+
+static inline bool
+hard_reg_set_intersect_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  return (x[0] & y[0]) != 0 || (x[1] & y[1]) != 0;
+}
+
+static inline bool
+hard_reg_set_empty_p (const HARD_REG_SET x)
+{
+  return x[0] == 0 && x[1] == 0;
+}

 
 #else
 
 #else

-#if FIRST_PSEUDO_REGISTER <= 3*HOST_BITS_PER_WIDE_INT
+#if FIRST_PSEUDO_REGISTER <= 3*HOST_BITS_PER_WIDEST_FAST_INT

 #define CLEAR_HARD_REG_SET(TO)  \
 do { HARD_REG_ELT_TYPE *scan_tp_ = (TO);                       \
      scan_tp_[0] = 0;                                          \
 #define CLEAR_HARD_REG_SET(TO)  \
 do { HARD_REG_ELT_TYPE *scan_tp_ = (TO);                       \
      scan_tp_[0] = 0;                                          \


@@ -228,22 +264,36 @@ do { HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM);      \
      scan_tp_[1] |= ~ scan_fp_[1];                             \
      scan_tp_[2] |= ~ scan_fp_[2]; } while (0)
 
      scan_tp_[1] |= ~ scan_fp_[1];                             \
      scan_tp_[2] |= ~ scan_fp_[2]; } while (0)
 

-#define GO_IF_HARD_REG_SUBSET(X,Y,TO)  \
-do { HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y);       \
-     if ((0 == (scan_xp_[0] & ~ scan_yp_[0]))                  \
-        && (0 == (scan_xp_[1] & ~ scan_yp_[1]))                \
-        && (0 == (scan_xp_[2] & ~ scan_yp_[2])))               \
-       goto TO; } while (0)
-
-#define GO_IF_HARD_REG_EQUAL(X,Y,TO)  \
-do { HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y);       \
-     if ((scan_xp_[0] == scan_yp_[0])                          \
-        && (scan_xp_[1] == scan_yp_[1])                        \
-        && (scan_xp_[2] == scan_yp_[2]))                       \
-       goto TO; } while (0)
+static inline bool
+hard_reg_set_subset_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  return ((x[0] & ~y[0]) == 0
+         && (x[1] & ~y[1]) == 0
+         && (x[2] & ~y[2]) == 0);
+}
+
+static inline bool
+hard_reg_set_equal_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  return x[0] == y[0] && x[1] == y[1] && x[2] == y[2];
+}
+
+static inline bool
+hard_reg_set_intersect_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  return ((x[0] & y[0]) != 0
+         || (x[1] & y[1]) != 0
+         || (x[2] & y[2]) != 0);
+}
+
+static inline bool
+hard_reg_set_empty_p (const HARD_REG_SET x)
+{
+  return x[0] == 0 && x[1] == 0 && x[2] == 0;
+}

 
 #else
 
 #else

-#if FIRST_PSEUDO_REGISTER <= 4*HOST_BITS_PER_WIDE_INT
+#if FIRST_PSEUDO_REGISTER <= 4*HOST_BITS_PER_WIDEST_FAST_INT

 #define CLEAR_HARD_REG_SET(TO)  \
 do { HARD_REG_ELT_TYPE *scan_tp_ = (TO);                       \
      scan_tp_[0] = 0;                                          \
 #define CLEAR_HARD_REG_SET(TO)  \
 do { HARD_REG_ELT_TYPE *scan_tp_ = (TO);                       \
      scan_tp_[0] = 0;                                          \


@@ -300,23 +350,37 @@ do { HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM);      \
      scan_tp_[2] |= ~ scan_fp_[2];                             \
      scan_tp_[3] |= ~ scan_fp_[3]; } while (0)
 
      scan_tp_[2] |= ~ scan_fp_[2];                             \
      scan_tp_[3] |= ~ scan_fp_[3]; } while (0)
 

-#define GO_IF_HARD_REG_SUBSET(X,Y,TO)  \
-do { HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y);       \
-     if ((0 == (scan_xp_[0] & ~ scan_yp_[0]))                  \
-        && (0 == (scan_xp_[1] & ~ scan_yp_[1]))                \
-        && (0 == (scan_xp_[2] & ~ scan_yp_[2]))                \
-        && (0 == (scan_xp_[3] & ~ scan_yp_[3])))               \
-       goto TO; } while (0)
-
-#define GO_IF_HARD_REG_EQUAL(X,Y,TO)  \
-do { HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y);       \
-     if ((scan_xp_[0] == scan_yp_[0])                          \
-        && (scan_xp_[1] == scan_yp_[1])                        \
-        && (scan_xp_[2] == scan_yp_[2])                        \
-        && (scan_xp_[3] == scan_yp_[3]))                       \
-       goto TO; } while (0)
-
-#else /* FIRST_PSEUDO_REGISTER > 3*HOST_BITS_PER_WIDE_INT */
+static inline bool
+hard_reg_set_subset_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  return ((x[0] & ~y[0]) == 0
+         && (x[1] & ~y[1]) == 0
+         && (x[2] & ~y[2]) == 0
+         && (x[3] & ~y[3]) == 0);
+}
+
+static inline bool
+hard_reg_set_equal_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  return x[0] == y[0] && x[1] == y[1] && x[2] == y[2] && x[3] == y[3];
+}
+
+static inline bool
+hard_reg_set_intersect_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  return ((x[0] & y[0]) != 0
+         || (x[1] & y[1]) != 0
+         || (x[2] & y[2]) != 0
+         || (x[3] & y[3]) != 0);
+}
+
+static inline bool
+hard_reg_set_empty_p (const HARD_REG_SET x)
+{
+  return x[0] == 0 && x[1] == 0 && x[2] == 0 && x[3] == 0;
+}
+
+#else /* FIRST_PSEUDO_REGISTER > 4*HOST_BITS_PER_WIDEST_FAST_INT */

 
 #define CLEAR_HARD_REG_SET(TO)  \
 do { HARD_REG_ELT_TYPE *scan_tp_ = (TO);                       \
 
 #define CLEAR_HARD_REG_SET(TO)  \
 do { HARD_REG_ELT_TYPE *scan_tp_ = (TO);                       \


@@ -366,63 +430,150 @@ do { HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM);     \
      for (i = 0; i < HARD_REG_SET_LONGS; i++)                  \
        *scan_tp_++ |= ~ *scan_fp_++; } while (0)
 
      for (i = 0; i < HARD_REG_SET_LONGS; i++)                  \
        *scan_tp_++ |= ~ *scan_fp_++; } while (0)
 

-#define GO_IF_HARD_REG_SUBSET(X,Y,TO)  \
-do { HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y);       \
-     int i;                                                    \
-     for (i = 0; i < HARD_REG_SET_LONGS; i++)                  \
-       if (0 != (*scan_xp_++ & ~ *scan_yp_++)) break;          \
-     if (i == HARD_REG_SET_LONGS) goto TO; } while (0)
-
-#define GO_IF_HARD_REG_EQUAL(X,Y,TO)  \
-do { HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y);       \
-     int i;                                                    \
-     for (i = 0; i < HARD_REG_SET_LONGS; i++)                  \
-       if (*scan_xp_++ != *scan_yp_++) break;                  \
-     if (i == HARD_REG_SET_LONGS) goto TO; } while (0)
+static inline bool
+hard_reg_set_subset_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  int i;
+
+  for (i = 0; i < HARD_REG_SET_LONGS; i++)
+    if ((x[i] & ~y[i]) != 0)
+      return false;
+  return true;
+}
+
+static inline bool
+hard_reg_set_equal_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  int i;
+
+  for (i = 0; i < HARD_REG_SET_LONGS; i++)
+    if (x[i] != y[i])
+      return false;
+  return true;
+}
+
+static inline bool
+hard_reg_set_intersect_p (const HARD_REG_SET x, const HARD_REG_SET y)
+{
+  int i;
+
+  for (i = 0; i < HARD_REG_SET_LONGS; i++)
+    if ((x[i] & y[i]) != 0)
+      return true;
+  return false;
+}
+
+static inline bool
+hard_reg_set_empty_p (const HARD_REG_SET x)
+{
+  int i;
+
+  for (i = 0; i < HARD_REG_SET_LONGS; i++)
+    if (x[i] != 0)
+      return false;
+  return true;
+}

 
 #endif
 #endif
 #endif
 #endif
 
 
 #endif
 #endif
 #endif
 #endif
 

-/* Define some standard sets of registers.  */
-
-/* Indexed by hard register number, contains 1 for registers
-   that are fixed use (stack pointer, pc, frame pointer, etc.).
-   These are the registers that cannot be used to allocate
-   a pseudo reg whose life does not cross calls.  */
-
-extern char fixed_regs[FIRST_PSEUDO_REGISTER];
+/* Iterator for hard register sets.  */

 
 

-/* The same info as a HARD_REG_SET.  */
-
-extern HARD_REG_SET fixed_reg_set;
-
-/* Indexed by hard register number, contains 1 for registers
-   that are fixed use or are clobbered by function calls.
-   These are the registers that cannot be used to allocate
-   a pseudo reg whose life crosses calls.  */
+typedef struct
+{
+  /* Pointer to the current element.  */
+  HARD_REG_ELT_TYPE *pelt;

 
 

-extern char call_used_regs[FIRST_PSEUDO_REGISTER];
+  /* The length of the set.  */
+  unsigned short length;

 
 

-/* The same info as a HARD_REG_SET.  */
+  /* Word within the current element.  */
+  unsigned short word_no;

 
 

-extern HARD_REG_SET call_used_reg_set;
-  
-/* Registers that we don't want to caller save.  */
-extern HARD_REG_SET losing_caller_save_reg_set;
+  /* Contents of the actually processed word.  When finding next bit
+     it is shifted right, so that the actual bit is always the least
+     significant bit of ACTUAL.  */
+  HARD_REG_ELT_TYPE bits;
+} hard_reg_set_iterator;

 
 

-/* Indexed by hard register number, contains 1 for registers that are
-   fixed use -- i.e. in fixed_regs -- or a function value return register
-   or STRUCT_VALUE_REGNUM or STATIC_CHAIN_REGNUM.  These are the
-   registers that cannot hold quantities across calls even if we are
-   willing to save and restore them.  */
+#define HARD_REG_ELT_BITS UHOST_BITS_PER_WIDE_INT

 
 

-extern char call_fixed_regs[FIRST_PSEUDO_REGISTER];
+/* The implementation of the iterator functions is fully analogous to
+   the bitmap iterators.  */
+static inline void
+hard_reg_set_iter_init (hard_reg_set_iterator *iter, HARD_REG_SET set,
+                        unsigned min, unsigned *regno)
+{
+#ifdef HARD_REG_SET_LONGS
+  iter->pelt = set;
+  iter->length = HARD_REG_SET_LONGS;
+#else
+  iter->pelt = &set;
+  iter->length = 1;
+#endif
+  iter->word_no = min / HARD_REG_ELT_BITS;
+  if (iter->word_no < iter->length)
+    {
+      iter->bits = iter->pelt[iter->word_no];
+      iter->bits >>= min % HARD_REG_ELT_BITS;
+
+      /* This is required for correct search of the next bit.  */
+      min += !iter->bits;
+    }
+  *regno = min;
+}
+
+static inline bool
+hard_reg_set_iter_set (hard_reg_set_iterator *iter, unsigned *regno)
+{
+  while (1)
+    {
+      /* Return false when we're advanced past the end of the set.  */
+      if (iter->word_no >= iter->length)
+        return false;
+
+      if (iter->bits)
+        {
+          /* Find the correct bit and return it.  */
+          while (!(iter->bits & 1))
+            {
+              iter->bits >>= 1;
+              *regno += 1;
+            }
+          return (*regno < FIRST_PSEUDO_REGISTER);
+        }
+
+      /* Round to the beginning of the next word.  */
+      *regno = (*regno + HARD_REG_ELT_BITS - 1);
+      *regno -= *regno % HARD_REG_ELT_BITS;
+
+      /* Find the next non-zero word.  */
+      while (++iter->word_no < iter->length)
+        {
+          iter->bits = iter->pelt[iter->word_no];
+          if (iter->bits)
+            break;
+          *regno += HARD_REG_ELT_BITS;
+        }
+    }
+}
+
+static inline void
+hard_reg_set_iter_next (hard_reg_set_iterator *iter, unsigned *regno)
+{
+  iter->bits >>= 1;
+  *regno += 1;
+}
+
+#define EXECUTE_IF_SET_IN_HARD_REG_SET(SET, MIN, REGNUM, ITER)          \
+  for (hard_reg_set_iter_init (&(ITER), (SET), (MIN), &(REGNUM));       \
+       hard_reg_set_iter_set (&(ITER), &(REGNUM));                      \
+       hard_reg_set_iter_next (&(ITER), &(REGNUM)))

 
 

-/* The same info as a HARD_REG_SET.  */

 
 

-extern HARD_REG_SET call_fixed_reg_set;
+/* Define some standard sets of registers.  */

 
 /* Indexed by hard register number, contains 1 for registers
    that are being used for global register decls.
 
 /* Indexed by hard register number, contains 1 for registers
    that are being used for global register decls.


@@ -431,57 +582,136 @@ extern HARD_REG_SET call_fixed_reg_set;
 
 extern char global_regs[FIRST_PSEUDO_REGISTER];
 
 
 extern char global_regs[FIRST_PSEUDO_REGISTER];
 

-/* Contains 1 for registers that are set or clobbered by calls.  */
-/* ??? Ideally, this would be just call_used_regs plus global_regs, but
-   for someone's bright idea to have call_used_regs strictly include
-   fixed_regs.  Which leaves us guessing as to the set of fixed_regs
-   that are actually preserved.  We know for sure that those associated
-   with the local stack frame are safe, but scant others.  */
+struct target_hard_regs {
+  /* The set of registers that actually exist on the current target.  */
+  HARD_REG_SET x_accessible_reg_set;

 
 

-extern HARD_REG_SET regs_invalidated_by_call;
+  /* The set of registers that should be considered to be register
+     operands.  It is a subset of x_accessible_reg_set.  */
+  HARD_REG_SET x_operand_reg_set;

 
 

-#ifdef REG_ALLOC_ORDER
-/* Table of register numbers in the order in which to try to use them.  */
+  /* Indexed by hard register number, contains 1 for registers
+     that are fixed use (stack pointer, pc, frame pointer, etc.;.
+     These are the registers that cannot be used to allocate
+     a pseudo reg whose life does not cross calls.  */
+  char x_fixed_regs[FIRST_PSEUDO_REGISTER];

 
 

-extern int reg_alloc_order[FIRST_PSEUDO_REGISTER];
+  /* The same info as a HARD_REG_SET.  */
+  HARD_REG_SET x_fixed_reg_set;

 
 

-/* The inverse of reg_alloc_order.  */
+  /* Indexed by hard register number, contains 1 for registers
+     that are fixed use or are clobbered by function calls.
+     These are the registers that cannot be used to allocate
+     a pseudo reg whose life crosses calls.  */
+  char x_call_used_regs[FIRST_PSEUDO_REGISTER];

 
 

-extern int inv_reg_alloc_order[FIRST_PSEUDO_REGISTER];
-#endif
+  char x_call_really_used_regs[FIRST_PSEUDO_REGISTER];

 
 

-/* For each reg class, a HARD_REG_SET saying which registers are in it.  */
+  /* The same info as a HARD_REG_SET.  */
+  HARD_REG_SET x_call_used_reg_set;

 
 

-extern HARD_REG_SET reg_class_contents[];
+  /* Contains registers that are fixed use -- i.e. in fixed_reg_set -- or
+     a function value return register or TARGET_STRUCT_VALUE_RTX or
+     STATIC_CHAIN_REGNUM.  These are the registers that cannot hold quantities
+     across calls even if we are willing to save and restore them.  */
+  HARD_REG_SET x_call_fixed_reg_set;

 
 

-/* For each reg class, number of regs it contains.  */
+  /* Contains 1 for registers that are set or clobbered by calls.  */
+  /* ??? Ideally, this would be just call_used_regs plus global_regs, but
+     for someone's bright idea to have call_used_regs strictly include
+     fixed_regs.  Which leaves us guessing as to the set of fixed_regs
+     that are actually preserved.  We know for sure that those associated
+     with the local stack frame are safe, but scant others.  */
+  HARD_REG_SET x_regs_invalidated_by_call;

 
 

-extern unsigned int reg_class_size[N_REG_CLASSES];
+  /* Call used hard registers which can not be saved because there is no
+     insn for this.  */
+  HARD_REG_SET x_no_caller_save_reg_set;

 
 

-/* For each reg class, table listing all the containing classes.  */
+  /* Table of register numbers in the order in which to try to use them.  */
+  int x_reg_alloc_order[FIRST_PSEUDO_REGISTER];

 
 

-extern enum reg_class reg_class_superclasses[N_REG_CLASSES][N_REG_CLASSES];
+  /* The inverse of reg_alloc_order.  */
+  int x_inv_reg_alloc_order[FIRST_PSEUDO_REGISTER];

 
 

-/* For each reg class, table listing all the classes contained in it.  */
+  /* For each reg class, a HARD_REG_SET saying which registers are in it.  */
+  HARD_REG_SET x_reg_class_contents[N_REG_CLASSES];

 
 

-extern enum reg_class reg_class_subclasses[N_REG_CLASSES][N_REG_CLASSES];
+  /* For each reg class, a boolean saying whether the class contains only
+     fixed registers.  */
+  bool x_class_only_fixed_regs[N_REG_CLASSES];

 
 

-/* For each pair of reg classes,
-   a largest reg class contained in their union.  */
+  /* For each reg class, number of regs it contains.  */
+  unsigned int x_reg_class_size[N_REG_CLASSES];

 
 

-extern enum reg_class reg_class_subunion[N_REG_CLASSES][N_REG_CLASSES];
+  /* For each reg class, table listing all the classes contained in it.  */
+  enum reg_class x_reg_class_subclasses[N_REG_CLASSES][N_REG_CLASSES];

 
 

-/* For each pair of reg classes,
-   the smallest reg class that contains their union.  */
+  /* For each pair of reg classes,
+     a largest reg class contained in their union.  */
+  enum reg_class x_reg_class_subunion[N_REG_CLASSES][N_REG_CLASSES];

 
 

-extern enum reg_class reg_class_superunion[N_REG_CLASSES][N_REG_CLASSES];
+  /* For each pair of reg classes,
+     the smallest reg class that contains their union.  */
+  enum reg_class x_reg_class_superunion[N_REG_CLASSES][N_REG_CLASSES];

 
 

-/* Number of non-fixed registers.  */
+  /* Vector indexed by hardware reg giving its name.  */
+  const char *x_reg_names[FIRST_PSEUDO_REGISTER];
+};

 
 

-extern int n_non_fixed_regs;
-
-/* Vector indexed by hardware reg giving its name.  */
+extern struct target_hard_regs default_target_hard_regs;
+#if SWITCHABLE_TARGET
+extern struct target_hard_regs *this_target_hard_regs;
+#else
+#define this_target_hard_regs (&default_target_hard_regs)
+#endif

 
 

-extern const char * reg_names[FIRST_PSEUDO_REGISTER];
+#define accessible_reg_set \
+  (this_target_hard_regs->x_accessible_reg_set)
+#define operand_reg_set \
+  (this_target_hard_regs->x_operand_reg_set)
+#define fixed_regs \
+  (this_target_hard_regs->x_fixed_regs)
+#define fixed_reg_set \
+  (this_target_hard_regs->x_fixed_reg_set)
+#define call_used_regs \
+  (this_target_hard_regs->x_call_used_regs)
+#define call_really_used_regs \
+  (this_target_hard_regs->x_call_really_used_regs)
+#define call_used_reg_set \
+  (this_target_hard_regs->x_call_used_reg_set)
+#define call_fixed_reg_set \
+  (this_target_hard_regs->x_call_fixed_reg_set)
+#define regs_invalidated_by_call \
+  (this_target_hard_regs->x_regs_invalidated_by_call)
+#define no_caller_save_reg_set \
+  (this_target_hard_regs->x_no_caller_save_reg_set)
+#define reg_alloc_order \
+  (this_target_hard_regs->x_reg_alloc_order)
+#define inv_reg_alloc_order \
+  (this_target_hard_regs->x_inv_reg_alloc_order)
+#define reg_class_contents \
+  (this_target_hard_regs->x_reg_class_contents)
+#define class_only_fixed_regs \
+  (this_target_hard_regs->x_class_only_fixed_regs)
+#define reg_class_size \
+  (this_target_hard_regs->x_reg_class_size)
+#define reg_class_subclasses \
+  (this_target_hard_regs->x_reg_class_subclasses)
+#define reg_class_subunion \
+  (this_target_hard_regs->x_reg_class_subunion)
+#define reg_class_superunion \
+  (this_target_hard_regs->x_reg_class_superunion)
+#define reg_names \
+  (this_target_hard_regs->x_reg_names)
+
+/* Vector indexed by reg class giving its name.  */
+
+extern const char * reg_class_names[];
+
+/* Given a hard REGN a FROM mode and a TO mode, return nonzero if
+   REGN cannot change modes between the specified modes.  */
+#define REG_CANNOT_CHANGE_MODE_P(REGN, FROM, TO)                          \
+         CANNOT_CHANGE_MODE_CLASS (FROM, TO, REGNO_REG_CLASS (REGN))

 
 #endif /* ! GCC_HARD_REG_SET_H */
 
 #endif /* ! GCC_HARD_REG_SET_H */