Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 278 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/vec.c b/gcc-4.9/gcc/vec.c
new file mode 100644
index 000000000..c0cd3386b
--- /dev/null
+++ b/gcc-4.9/gcc/vec.c
@@ -0,0 +1,278 @@
+/* Vector API for GNU compiler.
+   Copyright (C) 2004-2014 Free Software Foundation, Inc.
+   Contributed by Nathan Sidwell <nathan@codesourcery.com>
+   Re-implemented in C++ by Diego Novillo <dnovillo@google.com>
+
+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 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+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
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+/* This file is compiled twice: once for the generator programs
+   once for the compiler.  */
+#ifdef GENERATOR_FILE
+#include "bconfig.h"
+#else
+#include "config.h"
+#endif
+
+#include "system.h"
+#include "coretypes.h"
+#include "ggc.h"
+#include "vec.h"
+#include "diagnostic-core.h"
+#include "hashtab.h"
+
+/* vNULL is an empty type with a template cast operation that returns
+   a zero-initialized vec<T, A, L> instance.  Use this when you want
+   to assign nil values to new vec instances or pass a nil vector as
+   a function call argument.
+
+   We use this technique because vec<T, A, L> must be PODs (they are
+   stored in unions and passed in vararg functions), this means that
+   they cannot have ctors/dtors.  */
+vnull vNULL;
+
+
+/* Store information about each particular vector.  */
+struct vec_descriptor
+{
+  const char *function;
+  const char *file;
+  int line;
+  size_t allocated;
+  size_t times;
+  size_t peak;
+};
+
+
+/* Hashtable mapping vec addresses to descriptors.  */
+static htab_t vec_desc_hash;
+
+/* Hashtable helpers.  */
+static hashval_t
+hash_descriptor (const void *p)
+{
+  const struct vec_descriptor *const d =
+    (const struct vec_descriptor *) p;
+  return htab_hash_pointer (d->file) + d->line;
+}
+static int
+eq_descriptor (const void *p1, const void *p2)
+{
+  const struct vec_descriptor *const d = (const struct vec_descriptor *) p1;
+  const struct vec_descriptor *const l = (const struct vec_descriptor *) p2;
+  return d->file == l->file && d->function == l->function && d->line == l->line;
+}
+
+/* Hashtable converting address of allocated field to loc descriptor.  */
+static htab_t ptr_hash;
+struct ptr_hash_entry
+{
+  void *ptr;
+  struct vec_descriptor *loc;
+  size_t allocated;
+};
+
+/* Hash table helpers functions.  */
+static hashval_t
+hash_ptr (const void *p)
+{
+  const struct ptr_hash_entry *const d = (const struct ptr_hash_entry *) p;
+
+  return htab_hash_pointer (d->ptr);
+}
+
+static int
+eq_ptr (const void *p1, const void *p2)
+{
+  const struct ptr_hash_entry *const p = (const struct ptr_hash_entry *) p1;
+
+  return (p->ptr == p2);
+}
+
+/* Return descriptor for given call site, create new one if needed.  */
+static struct vec_descriptor *
+vec_descriptor (const char *name, int line, const char *function)
+{
+  struct vec_descriptor loc;
+  struct vec_descriptor **slot;
+
+  loc.file = name;
+  loc.line = line;
+  loc.function = function;
+  if (!vec_desc_hash)
+    vec_desc_hash = htab_create (10, hash_descriptor, eq_descriptor, NULL);
+
+  slot = (struct vec_descriptor **) htab_find_slot (vec_desc_hash, &loc,
+						    INSERT);
+  if (*slot)
+    return *slot;
+  *slot = XCNEW (struct vec_descriptor);
+  (*slot)->file = name;
+  (*slot)->line = line;
+  (*slot)->function = function;
+  (*slot)->allocated = 0;
+  (*slot)->peak = 0;
+  return *slot;
+}
+
+/* Account the overhead.  */
+
+void
+vec_prefix::register_overhead (size_t size, const char *name, int line,
+			       const char *function)
+{
+  struct vec_descriptor *loc = vec_descriptor (name, line, function);
+  struct ptr_hash_entry *p = XNEW (struct ptr_hash_entry);
+  PTR *slot;
+
+  p->ptr = this;
+  p->loc = loc;
+  p->allocated = size;
+  if (!ptr_hash)
+    ptr_hash = htab_create (10, hash_ptr, eq_ptr, NULL);
+  slot = htab_find_slot_with_hash (ptr_hash, this, htab_hash_pointer (this),
+				   INSERT);
+  gcc_assert (!*slot);
+  *slot = p;
+
+  loc->allocated += size;
+  if (loc->peak < loc->allocated)
+    loc->peak += loc->allocated;
+  loc->times++;
+}
+
+
+/* Notice that the memory allocated for the vector has been freed.  */
+
+void
+vec_prefix::release_overhead (void)
+{
+  PTR *slot = htab_find_slot_with_hash (ptr_hash, this,
+					htab_hash_pointer (this),
+					NO_INSERT);
+  struct ptr_hash_entry *p = (struct ptr_hash_entry *) *slot;
+  p->loc->allocated -= p->allocated;
+  htab_clear_slot (ptr_hash, slot);
+  ::free (p);
+}
+
+
+/* Calculate the number of slots to reserve a vector, making sure that
+   it is of at least DESIRED size by growing ALLOC exponentially.  */
+
+unsigned
+vec_prefix::calculate_allocation_1 (unsigned alloc, unsigned desired)
+{
+  /* We must have run out of room.  */
+  gcc_assert (alloc < desired);
+
+  /* Exponential growth. */
+  if (!alloc)
+    alloc = 4;
+  else if (alloc < 16)
+    /* Double when small.  */
+    alloc = alloc * 2;
+  else
+    /* Grow slower when large.  */
+    alloc = (alloc * 3 / 2);
+
+  /* If this is still too small, set it to the right size. */
+  if (alloc < desired)
+    alloc = desired;
+  return alloc;
+}
+
+
+/* Helper for qsort; sort descriptors by amount of memory consumed.  */
+
+static int
+cmp_statistic (const void *loc1, const void *loc2)
+{
+  const struct vec_descriptor *const l1 =
+    *(const struct vec_descriptor *const *) loc1;
+  const struct vec_descriptor *const l2 =
+    *(const struct vec_descriptor *const *) loc2;
+  long diff;
+  diff = l1->allocated - l2->allocated;
+  if (!diff)
+    diff = l1->peak - l2->peak;
+  if (!diff)
+    diff = l1->times - l2->times;
+  return diff > 0 ? 1 : diff < 0 ? -1 : 0;
+}
+
+
+/* Collect array of the descriptors from hashtable.  */
+
+static struct vec_descriptor **loc_array;
+static int
+add_statistics (void **slot, void *b)
+{
+  int *n = (int *)b;
+  loc_array[*n] = (struct vec_descriptor *) *slot;
+  (*n)++;
+  return 1;
+}
+
+/* Dump per-site memory statistics.  */
+
+void
+dump_vec_loc_statistics (void)
+{
+  int nentries = 0;
+  char s[4096];
+  size_t allocated = 0;
+  size_t times = 0;
+  int i;
+
+  if (! GATHER_STATISTICS)
+    return;
+
+  loc_array = XCNEWVEC (struct vec_descriptor *, vec_desc_hash->n_elements);
+  fprintf (stderr, "Heap vectors:\n");
+  fprintf (stderr, "\n%-48s %10s       %10s       %10s\n",
+	   "source location", "Leak", "Peak", "Times");
+  fprintf (stderr, "-------------------------------------------------------\n");
+  htab_traverse (vec_desc_hash, add_statistics, &nentries);
+  qsort (loc_array, nentries, sizeof (*loc_array), cmp_statistic);
+  for (i = 0; i < nentries; i++)
+    {
+      struct vec_descriptor *d = loc_array[i];
+      allocated += d->allocated;
+      times += d->times;
+    }
+  for (i = 0; i < nentries; i++)
+    {
+      struct vec_descriptor *d = loc_array[i];
+      const char *s1 = d->file;
+      const char *s2;
+      while ((s2 = strstr (s1, "gcc/")))
+	s1 = s2 + 4;
+      sprintf (s, "%s:%i (%s)", s1, d->line, d->function);
+      s[48] = 0;
+      fprintf (stderr, "%-48s %10li:%4.1f%% %10li      %10li:%4.1f%% \n", s,
+	       (long)d->allocated,
+	       (d->allocated) * 100.0 / allocated,
+	       (long)d->peak,
+	       (long)d->times,
+	       (d->times) * 100.0 / times);
+    }
+  fprintf (stderr, "%-48s %10ld                        %10ld\n",
+	   "Total", (long)allocated, (long)times);
+  fprintf (stderr, "\n%-48s %10s       %10s       %10s\n",
+	   "source location", "Leak", "Peak", "Times");
+  fprintf (stderr, "-------------------------------------------------------\n");
+}