[gcc r15-31] Remove GTY support for vrange and derived classes.

[gcc r15-31] Remove GTY support for vrange and derived classes.

[Aldy Hernandez]

https://gcc.gnu.org/g:eeef1f69c5e77ecf13fdcf44df5bcf592a9993e6

commit r15-31-geeef1f69c5e77ecf13fdcf44df5bcf592a9993e6
Author: Aldy Hernandez <aldyh@redhat.com>
Date:   Wed Feb 21 09:34:29 2024 +0100

    Remove GTY support for vrange and derived classes.
    
    Now that we have a vrange storage class to save ranges in long-term
    memory, there is no need for GTY markers for any of the vrange
    classes, since they should never live in GC.
    
    gcc/ChangeLog:
    
            * value-range-storage.h: Remove friends.
            * value-range.cc (gt_ggc_mx): Remove.
            (gt_pch_nx): Remove.
            * value-range.h (class vrange): Remove GTY markers.
            (class irange): Same.
            (class int_range): Same.
            (class frange): Same.
            (gt_ggc_mx): Remove.
            (gt_pch_nx): Remove.

Diff:
---
 gcc/value-range-storage.h |  4 ---
 gcc/value-range.cc        | 73 -----------------------------------------------
 gcc/value-range.h         | 46 +++--------------------------
 3 files changed, 4 insertions(+), 119 deletions(-)

diff --git a/gcc/value-range-storage.h b/gcc/value-range-storage.h
index d94c520aa73..5756de7e32d 100644
--- a/gcc/value-range-storage.h
+++ b/gcc/value-range-storage.h
@@ -75,10 +75,6 @@ private:
   static size_t size (const irange &r);
   const unsigned short *lengths_address () const;
   unsigned short *write_lengths_address ();
-  friend void gt_ggc_mx_irange_storage (void *);
-  friend void gt_pch_p_14irange_storage (void *, void *,
-					      gt_pointer_operator, void *);
-  friend void gt_pch_nx_irange_storage (void *);
 
   // The shared precision of each number.
   unsigned short m_precision;
diff --git a/gcc/value-range.cc b/gcc/value-range.cc
index 926f7b707ea..b901c864a7b 100644
--- a/gcc/value-range.cc
+++ b/gcc/value-range.cc
@@ -2165,79 +2165,6 @@ vrp_operand_equal_p (const_tree val1, const_tree val2)
   return true;
 }
 
-void
-gt_ggc_mx (irange *x)
-{
-  if (!x->undefined_p ())
-    gt_ggc_mx (x->m_type);
-}
-
-void
-gt_pch_nx (irange *x)
-{
-  if (!x->undefined_p ())
-    gt_pch_nx (x->m_type);
-}
-
-void
-gt_pch_nx (irange *x, gt_pointer_operator op, void *cookie)
-{
-  for (unsigned i = 0; i < x->m_num_ranges; ++i)
-    {
-      op (&x->m_base[i * 2], NULL, cookie);
-      op (&x->m_base[i * 2 + 1], NULL, cookie);
-    }
-}
-
-void
-gt_ggc_mx (frange *x)
-{
-  gt_ggc_mx (x->m_type);
-}
-
-void
-gt_pch_nx (frange *x)
-{
-  gt_pch_nx (x->m_type);
-}
-
-void
-gt_pch_nx (frange *x, gt_pointer_operator op, void *cookie)
-{
-  op (&x->m_type, NULL, cookie);
-}
-
-void
-gt_ggc_mx (vrange *x)
-{
-  if (is_a <irange> (*x))
-    return gt_ggc_mx ((irange *) x);
-  if (is_a <frange> (*x))
-    return gt_ggc_mx ((frange *) x);
-  gcc_unreachable ();
-}
-
-void
-gt_pch_nx (vrange *x)
-{
-  if (is_a <irange> (*x))
-    return gt_pch_nx ((irange *) x);
-  if (is_a <frange> (*x))
-    return gt_pch_nx ((frange *) x);
-  gcc_unreachable ();
-}
-
-void
-gt_pch_nx (vrange *x, gt_pointer_operator op, void *cookie)
-{
-  if (is_a <irange> (*x))
-    gt_pch_nx ((irange *) x, op, cookie);
-  else if (is_a <frange> (*x))
-    gt_pch_nx ((frange *) x, op, cookie);
-  else
-    gcc_unreachable ();
-}
-
 #define DEFINE_INT_RANGE_INSTANCE(N)					\
   template int_range<N>::int_range(tree_node *,				\
 				   const wide_int &,			\
diff --git a/gcc/value-range.h b/gcc/value-range.h
index 991ffeafcb8..2650ded6d10 100644
--- a/gcc/value-range.h
+++ b/gcc/value-range.h
@@ -72,7 +72,7 @@ enum value_range_discriminator
 //	if (f.supports_type_p (type)) ...
 //    }
 
-class GTY((user)) vrange
+class vrange
 {
   template <typename T> friend bool is_a (vrange &);
   friend class Value_Range;
@@ -279,7 +279,7 @@ irange_bitmask::intersect (const irange_bitmask &orig_src)
 
 // An integer range without any storage.
 
-class GTY((user)) irange : public vrange
+class irange : public vrange
 {
   friend value_range_kind get_legacy_range (const irange &, tree &, tree &);
   friend class irange_storage;
@@ -350,10 +350,6 @@ protected:
   // Hard limit on max ranges allowed.
   static const int HARD_MAX_RANGES = 255;
 private:
-  friend void gt_ggc_mx (irange *);
-  friend void gt_pch_nx (irange *);
-  friend void gt_pch_nx (irange *, gt_pointer_operator, void *);
-
   bool varying_compatible_p () const;
   bool intersect_bitmask (const irange &r);
   bool union_bitmask (const irange &r);
@@ -379,7 +375,7 @@ protected:
 // HARD_MAX_RANGES.  This new storage is freed upon destruction.
 
 template<unsigned N, bool RESIZABLE = false>
-class GTY((user)) int_range : public irange
+class int_range : public irange
 {
 public:
   int_range ();
@@ -484,13 +480,10 @@ nan_state::neg_p () const
 // The representation is a type with a couple of endpoints, unioned
 // with the set of { -NAN, +Nan }.
 
-class GTY((user)) frange : public vrange
+class frange : public vrange
 {
   friend class frange_storage;
   friend class vrange_printer;
-  friend void gt_ggc_mx (frange *);
-  friend void gt_pch_nx (frange *);
-  friend void gt_pch_nx (frange *, gt_pointer_operator, void *);
 public:
   frange ();
   frange (const frange &);
@@ -991,37 +984,6 @@ range_includes_zero_p (const irange *vr)
   return vr->contains_p (zero);
 }
 
-extern void gt_ggc_mx (vrange *);
-extern void gt_pch_nx (vrange *);
-extern void gt_pch_nx (vrange *, gt_pointer_operator, void *);
-extern void gt_ggc_mx (irange *);
-extern void gt_pch_nx (irange *);
-extern void gt_pch_nx (irange *, gt_pointer_operator, void *);
-extern void gt_ggc_mx (frange *);
-extern void gt_pch_nx (frange *);
-extern void gt_pch_nx (frange *, gt_pointer_operator, void *);
-
-template<unsigned N>
-inline void
-gt_ggc_mx (int_range<N> *x)
-{
-  gt_ggc_mx ((irange *) x);
-}
-
-template<unsigned N>
-inline void
-gt_pch_nx (int_range<N> *x)
-{
-  gt_pch_nx ((irange *) x);
-}
-
-template<unsigned N>
-inline void
-gt_pch_nx (int_range<N> *x, gt_pointer_operator op, void *cookie)
-{
-  gt_pch_nx ((irange *) x, op, cookie);
-}
-
 // Constructors for irange
 
 inline