/* IRA allocation based on graph coloring.
- Copyright (C) 2006, 2007, 2008, 2009, 2010
+ Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
Contributed by Vladimir Makarov <vmakarov@redhat.com>.
#include "reload.h"
#include "params.h"
#include "df.h"
-#include "splay-tree.h"
#include "ira-int.h"
+typedef struct object_hard_regs *object_hard_regs_t;
+
+/* The structure contains information about hard registers can be
+ assigned to objects. Usually it is allocno profitable hard
+ registers but in some cases this set can be a bit different. Major
+ reason of the difference is a requirement to use hard register sets
+ that form a tree or a forest (set of trees), i.e. hard register set
+ of a node should contain hard register sets of its subnodes. */
+struct object_hard_regs
+{
+ /* Hard registers can be assigned to an allocno. */
+ HARD_REG_SET set;
+ /* Overall (spilling) cost of all allocnos with given register
+ set. */
+ long long int cost;
+};
+
+typedef struct object_hard_regs_node *object_hard_regs_node_t;
+
+/* A node representing object hard registers. Such nodes form a
+ forest (set of trees). Each subnode of given node in the forest
+ refers for hard register set (usually object profitable hard
+ register set) which is a subset of one referred from given
+ node. */
+struct object_hard_regs_node
+{
+ /* Set up number of the node in preorder traversing of the forest. */
+ int preorder_num;
+ /* Used for different calculation like finding conflict size of an
+ allocno. */
+ int check;
+ /* Used for calculation of conflict size of an allocno. The
+ conflict size of the allocno is maximal number of given object
+ hard registers needed for allocation of the conflicting allocnos.
+ Given allocno is trivially colored if this number plus the number
+ of hard registers needed for given allocno is not greater than
+ the number of given allocno hard register set. */
+ int conflict_size;
+ /* The number of hard registers given by member hard_regs. */
+ int hard_regs_num;
+ /* The following member is used to form the final forest. */
+ bool used_p;
+ /* Pointer to the corresponding profitable hard registers. */
+ object_hard_regs_t hard_regs;
+ /* Parent, first subnode, previous and next node with the same
+ parent in the forest. */
+ object_hard_regs_node_t parent, first, prev, next;
+};
+
+/* To decrease footprint of ira_allocno structure we store all data
+ needed only for coloring in the following structure. */
+struct allocno_color_data
+{
+ /* TRUE value means that the allocno was not removed yet from the
+ conflicting graph during colouring. */
+ unsigned int in_graph_p : 1;
+ /* TRUE if it is put on the stack to make other allocnos
+ colorable. */
+ unsigned int may_be_spilled_p : 1;
+ /* TRUE if the object is trivially colorable. */
+ unsigned int colorable_p : 1;
+ /* Number of hard registers of the allocno class really
+ available for the allocno allocation. It is number of the
+ profitable hard regs. */
+ int available_regs_num;
+ /* Allocnos in a bucket (used in coloring) chained by the following
+ two members. */
+ ira_allocno_t next_bucket_allocno;
+ ira_allocno_t prev_bucket_allocno;
+ /* Used for temporary purposes. */
+ int temp;
+};
+
+/* See above. */
+typedef struct allocno_color_data *allocno_color_data_t;
+
+/* Container for storing allocno data concerning coloring. */
+static allocno_color_data_t allocno_color_data;
+
+/* Macro to access the data concerning coloring. */
+#define ALLOCNO_COLOR_DATA(a) ((allocno_color_data_t) ALLOCNO_ADD_DATA (a))
+
+/* To decrease footprint of ira_object structure we store all data
+ needed only for coloring in the following structure. */
+struct object_color_data
+{
+ /* Profitable hard regs available for this pseudo allocation. It
+ means that the set excludes unavailable hard regs and hard regs
+ conflicting with given pseudo. They should be of the allocno
+ class. */
+ HARD_REG_SET profitable_hard_regs;
+ /* The object hard registers node. */
+ object_hard_regs_node_t hard_regs_node;
+ /* Array of structures object_hard_regs_subnode representing
+ given object hard registers node (the 1st element in the array)
+ and all its subnodes in the tree (forest) of object hard
+ register nodes (see comments above). */
+ int hard_regs_subnodes_start;
+ /* The length of the previous array. */
+ int hard_regs_subnodes_num;
+};
+
+/* See above. */
+typedef struct object_color_data *object_color_data_t;
+
+/* Container for storing object data concerning coloring. */
+static object_color_data_t object_color_data;
+
+/* Macro to access the data concerning coloring. */
+#define OBJECT_COLOR_DATA(o) ((object_color_data_t) OBJECT_ADD_DATA (o))
+
/* This file contains code for regional graph coloring, spill/restore
code placement optimization, and code helping the reload pass to do
a better job. */
/* Vec representing the stack of allocnos used during coloring. */
static VEC(ira_allocno_t,heap) *allocno_stack_vec;
-/* Array used to choose an allocno for spilling. */
-static ira_allocno_t *allocnos_for_spilling;
+/* Helper for qsort comparison callbacks - return a positive integer if
+ X > Y, or a negative value otherwise. Use a conditional expression
+ instead of a difference computation to insulate from possible overflow
+ issues, e.g. X - Y < 0 for some X > 0 and Y < 0. */
+#define SORTGT(x,y) (((x) > (y)) ? 1 : -1)
+
+\f
+
+/* Definition of vector of object hard registers. */
+DEF_VEC_P(object_hard_regs_t);
+DEF_VEC_ALLOC_P(object_hard_regs_t, heap);
+
+/* Vector of unique object hard registers. */
+static VEC(object_hard_regs_t, heap) *object_hard_regs_vec;
+
+/* Returns hash value for object hard registers V. */
+static hashval_t
+object_hard_regs_hash (const void *v)
+{
+ const struct object_hard_regs *hv = (const struct object_hard_regs *) v;
+
+ return iterative_hash (&hv->set, sizeof (HARD_REG_SET), 0);
+}
+
+/* Compares object hard registers V1 and V2. */
+static int
+object_hard_regs_eq (const void *v1, const void *v2)
+{
+ const struct object_hard_regs *hv1 = (const struct object_hard_regs *) v1;
+ const struct object_hard_regs *hv2 = (const struct object_hard_regs *) v2;
+
+ return hard_reg_set_equal_p (hv1->set, hv2->set);
+}
+
+/* Hash table of unique object hard registers. */
+static htab_t object_hard_regs_htab;
+
+/* Return object hard registers in the hash table equal to HV. */
+static object_hard_regs_t
+find_hard_regs (object_hard_regs_t hv)
+{
+ return (object_hard_regs_t) htab_find (object_hard_regs_htab, hv);
+}
+
+/* Insert allocno hard registers HV in the hash table (if it is not
+ there yet) and return the value which in the table. */
+static object_hard_regs_t
+insert_hard_regs (object_hard_regs_t hv)
+{
+ PTR *slot = htab_find_slot (object_hard_regs_htab, hv, INSERT);
+
+ if (*slot == NULL)
+ *slot = hv;
+ return (object_hard_regs_t) *slot;
+}
+
+/* Initialize data concerning object hard registers. */
+static void
+init_object_hard_regs (void)
+{
+ object_hard_regs_vec = VEC_alloc (object_hard_regs_t, heap, 200);
+ object_hard_regs_htab
+ = htab_create (200, object_hard_regs_hash, object_hard_regs_eq, NULL);
+}
+
+/* Add (or update info about) object hard registers with SET and
+ COST. */
+static object_hard_regs_t
+add_object_hard_regs (HARD_REG_SET set, long long int cost)
+{
+ struct object_hard_regs temp;
+ object_hard_regs_t hv;
+
+ gcc_assert (! hard_reg_set_empty_p (set));
+ COPY_HARD_REG_SET (temp.set, set);
+ if ((hv = find_hard_regs (&temp)) != NULL)
+ hv->cost += cost;
+ else
+ {
+ hv = ((struct object_hard_regs *)
+ ira_allocate (sizeof (struct object_hard_regs)));
+ COPY_HARD_REG_SET (hv->set, set);
+ hv->cost = cost;
+ VEC_safe_push (object_hard_regs_t, heap, object_hard_regs_vec, hv);
+ insert_hard_regs (hv);
+ }
+ return hv;
+}
+
+/* Finalize data concerning allocno hard registers. */
+static void
+finish_object_hard_regs (void)
+{
+ int i;
+ object_hard_regs_t hv;
+
+ for (i = 0;
+ VEC_iterate (object_hard_regs_t, object_hard_regs_vec, i, hv);
+ i++)
+ ira_free (hv);
+ htab_delete (object_hard_regs_htab);
+ VEC_free (object_hard_regs_t, heap, object_hard_regs_vec);
+}
+
+/* Sort hard regs according to their frequency of usage. */
+static int
+object_hard_regs_compare (const void *v1p, const void *v2p)
+{
+ object_hard_regs_t hv1 = *(const object_hard_regs_t *) v1p;
+ object_hard_regs_t hv2 = *(const object_hard_regs_t *) v2p;
+
+ if (hv2->cost > hv1->cost)
+ return 1;
+ else if (hv2->cost < hv1->cost)
+ return -1;
+ else
+ return 0;
+}
+
+\f
+
+/* Used for finding a common ancestor of two allocno hard registers
+ nodes in the forest. We use the current value of
+ 'node_check_tick' to mark all nodes from one node to the top and
+ then walking up from another node until we find a marked node.
+
+ It is also used to figure out allocno colorability as a mark that
+ we already reset value of member 'conflict_size' for the forest
+ node corresponding to the processed allocno. */
+static int node_check_tick;
+
+/* Roots of the forest containing hard register sets can be assigned
+ to objects. */
+static object_hard_regs_node_t hard_regs_roots;
+
+/* Definition of vector of object hard register nodes. */
+DEF_VEC_P(object_hard_regs_node_t);
+DEF_VEC_ALLOC_P(object_hard_regs_node_t, heap);
+
+/* Vector used to create the forest. */
+static VEC(object_hard_regs_node_t, heap) *hard_regs_node_vec;
+
+/* Create and return object hard registers node containing object
+ hard registers HV. */
+static object_hard_regs_node_t
+create_new_object_hard_regs_node (object_hard_regs_t hv)
+{
+ object_hard_regs_node_t new_node;
+
+ new_node = ((struct object_hard_regs_node *)
+ ira_allocate (sizeof (struct object_hard_regs_node)));
+ new_node->check = 0;
+ new_node->hard_regs = hv;
+ new_node->hard_regs_num = hard_reg_set_size (hv->set);
+ new_node->first = NULL;
+ new_node->used_p = false;
+ return new_node;
+}
+
+/* Add object hard registers node NEW_NODE to the forest on its level
+ given by ROOTS. */
+static void
+add_new_object_hard_regs_node_to_forest (object_hard_regs_node_t *roots,
+ object_hard_regs_node_t new_node)
+{
+ new_node->next = *roots;
+ if (new_node->next != NULL)
+ new_node->next->prev = new_node;
+ new_node->prev = NULL;
+ *roots = new_node;
+}
+
+/* Add object hard registers HV (or its best approximation if it is
+ not possible) to the forest on its level given by ROOTS. */
+static void
+add_object_hard_regs_to_forest (object_hard_regs_node_t *roots,
+ object_hard_regs_t hv)
+{
+ unsigned int i, start;
+ object_hard_regs_node_t node, prev, new_node;
+ HARD_REG_SET temp_set;
+ object_hard_regs_t hv2;
+
+ start = VEC_length (object_hard_regs_node_t, hard_regs_node_vec);
+ for (node = *roots; node != NULL; node = node->next)
+ {
+ if (hard_reg_set_equal_p (hv->set, node->hard_regs->set))
+ return;
+ if (hard_reg_set_subset_p (hv->set, node->hard_regs->set))
+ {
+ add_object_hard_regs_to_forest (&node->first, hv);
+ return;
+ }
+ if (hard_reg_set_subset_p (node->hard_regs->set, hv->set))
+ VEC_safe_push (object_hard_regs_node_t, heap,
+ hard_regs_node_vec, node);
+ else if (hard_reg_set_intersect_p (hv->set, node->hard_regs->set))
+ {
+ COPY_HARD_REG_SET (temp_set, hv->set);
+ AND_HARD_REG_SET (temp_set, node->hard_regs->set);
+ hv2 = add_object_hard_regs (temp_set, hv->cost);
+ add_object_hard_regs_to_forest (&node->first, hv2);
+ }
+ }
+ if (VEC_length (object_hard_regs_node_t, hard_regs_node_vec)
+ > start + 1)
+ {
+ /* Create a new node which contains nodes in hard_regs_node_vec. */
+ CLEAR_HARD_REG_SET (temp_set);
+ for (i = start;
+ i < VEC_length (object_hard_regs_node_t, hard_regs_node_vec);
+ i++)
+ {
+ node = VEC_index (object_hard_regs_node_t, hard_regs_node_vec, i);
+ IOR_HARD_REG_SET (temp_set, node->hard_regs->set);
+ }
+ hv = add_object_hard_regs (temp_set, hv->cost);
+ new_node = create_new_object_hard_regs_node (hv);
+ prev = NULL;
+ for (i = start;
+ i < VEC_length (object_hard_regs_node_t, hard_regs_node_vec);
+ i++)
+ {
+ node = VEC_index (object_hard_regs_node_t, hard_regs_node_vec, i);
+ if (node->prev == NULL)
+ *roots = node->next;
+ else
+ node->prev->next = node->next;
+ if (node->next != NULL)
+ node->next->prev = node->prev;
+ if (prev == NULL)
+ new_node->first = node;
+ else
+ prev->next = node;
+ node->prev = prev;
+ node->next = NULL;
+ prev = node;
+ }
+ add_new_object_hard_regs_node_to_forest (roots, new_node);
+ }
+ VEC_truncate (object_hard_regs_node_t, hard_regs_node_vec, start);
+}
+
+/* Add object hard registers nodes starting with the forest level
+ given by FIRST which contains biggest set inside SET. */
+static void
+collect_object_hard_regs_cover (object_hard_regs_node_t first,
+ HARD_REG_SET set)
+{
+ object_hard_regs_node_t node;
+
+ ira_assert (first != NULL);
+ for (node = first; node != NULL; node = node->next)
+ if (hard_reg_set_subset_p (node->hard_regs->set, set))
+ VEC_safe_push (object_hard_regs_node_t, heap, hard_regs_node_vec,
+ node);
+ else if (hard_reg_set_intersect_p (set, node->hard_regs->set))
+ collect_object_hard_regs_cover (node->first, set);
+}
+
+/* Set up field parent as PARENT in all object hard registers nodes
+ in forest given by FIRST. */
+static void
+setup_object_hard_regs_nodes_parent (object_hard_regs_node_t first,
+ object_hard_regs_node_t parent)
+{
+ object_hard_regs_node_t node;
+
+ for (node = first; node != NULL; node = node->next)
+ {
+ node->parent = parent;
+ setup_object_hard_regs_nodes_parent (node->first, node);
+ }
+}
+
+/* Return object hard registers node which is a first common ancestor
+ node of FIRST and SECOND in the forest. */
+static object_hard_regs_node_t
+first_common_ancestor_node (object_hard_regs_node_t first,
+ object_hard_regs_node_t second)
+{
+ object_hard_regs_node_t node;
+
+ node_check_tick++;
+ for (node = first; node != NULL; node = node->parent)
+ node->check = node_check_tick;
+ for (node = second; node != NULL; node = node->parent)
+ if (node->check == node_check_tick)
+ return node;
+ return first_common_ancestor_node (second, first);
+}
+
+/* Print hard reg set SET to F. */
+static void
+print_hard_reg_set (FILE *f, HARD_REG_SET set, bool new_line_p)
+{
+ int i, start;
+
+ for (start = -1, i = 0; i < FIRST_PSEUDO_REGISTER; i++)
+ {
+ if (TEST_HARD_REG_BIT (set, i))
+ {
+ if (i == 0 || ! TEST_HARD_REG_BIT (set, i - 1))
+ start = i;
+ }
+ if (start >= 0
+ && (i == FIRST_PSEUDO_REGISTER - 1 || ! TEST_HARD_REG_BIT (set, i)))
+ {
+ if (start == i - 1)
+ fprintf (f, " %d", start);
+ else if (start == i - 2)
+ fprintf (f, " %d %d", start, start + 1);
+ else
+ fprintf (f, " %d-%d", start, i - 1);
+ start = -1;
+ }
+ }
+ if (new_line_p)
+ fprintf (f, "\n");
+}
+
+/* Print object hard register subforest given by ROOTS and its LEVEL
+ to F. */
+static void
+print_hard_regs_subforest (FILE *f, object_hard_regs_node_t roots,
+ int level)
+{
+ int i;
+ object_hard_regs_node_t node;
+
+ for (node = roots; node != NULL; node = node->next)
+ {
+ fprintf (f, " ");
+ for (i = 0; i < level * 2; i++)
+ fprintf (f, " ");
+ fprintf (f, "%d:(", node->preorder_num);
+ print_hard_reg_set (f, node->hard_regs->set, false);
+ fprintf (f, ")@%lld\n", node->hard_regs->cost);
+ print_hard_regs_subforest (f, node->first, level + 1);
+ }
+}
+
+/* Print the object hard register forest to F. */
+static void
+print_hard_regs_forest (FILE *f)
+{
+ fprintf (f, " Hard reg set forest:\n");
+ print_hard_regs_subforest (f, hard_regs_roots, 1);
+}
+
+/* Print the object hard register forest to stderr. */
+void
+ira_debug_hard_regs_forest (void)
+{
+ print_hard_regs_forest (stderr);
+}
+
+/* Remove unused object hard registers nodes from forest given by its
+ *ROOTS. */
+static void
+remove_unused_object_hard_regs_nodes (object_hard_regs_node_t *roots)
+{
+ object_hard_regs_node_t node, prev, next, last;
+
+ for (prev = NULL, node = *roots; node != NULL; node = next)
+ {
+ next = node->next;
+ if (node->used_p)
+ {
+ remove_unused_object_hard_regs_nodes (&node->first);
+ prev = node;
+ }
+ else
+ {
+ for (last = node->first;
+ last != NULL && last->next != NULL;
+ last = last->next)
+ ;
+ if (last != NULL)
+ {
+ if (prev == NULL)
+ *roots = node->first;
+ else
+ prev->next = node->first;
+ if (next != NULL)
+ next->prev = last;
+ last->next = next;
+ next = node->first;
+ }
+ else
+ {
+ if (prev == NULL)
+ *roots = next;
+ else
+ prev->next = next;
+ if (next != NULL)
+ next->prev = prev;
+ }
+ ira_free (node);
+ }
+ }
+}
+
+/* Set up fields preorder_num starting with START_NUM in all object
+ hard registers nodes in forest given by FIRST. Return biggest set
+ PREORDER_NUM increased by 1. */
+static int
+enumerate_object_hard_regs_nodes (object_hard_regs_node_t first,
+ object_hard_regs_node_t parent,
+ int start_num)
+{
+ object_hard_regs_node_t node;
+
+ for (node = first; node != NULL; node = node->next)
+ {
+ node->preorder_num = start_num++;
+ node->parent = parent;
+ start_num = enumerate_object_hard_regs_nodes (node->first, node,
+ start_num);
+ }
+ return start_num;
+}
+
+/* Number of object hard registers nodes in the forest. */
+static int object_hard_regs_nodes_num;
+
+/* Table preorder number of object hard registers node in the forest
+ -> the object hard registers node. */
+static object_hard_regs_node_t *object_hard_regs_nodes;
+
+/* See below. */
+typedef struct object_hard_regs_subnode *object_hard_regs_subnode_t;
+
+/* The structure is used to describes all subnodes (not only immediate
+ ones) in the mentioned above tree for given object hard register
+ node. The usage of such data accelerates calculation of
+ colorability of given allocno. */
+struct object_hard_regs_subnode
+{
+ /* The conflict size of conflicting allocnos whose hard register
+ sets are equal sets (plus supersets if given node is given
+ object hard registers node) of one in the given node. */
+ int left_conflict_size;
+ /* The summary conflict size of conflicting allocnos whose hard
+ register sets are strict subsets of one in the given node.
+ Overall conflict size is
+ left_conflict_subnodes_size
+ + MIN (max_node_impact - left_conflict_subnodes_size,
+ left_conflict_size)
+ */
+ short left_conflict_subnodes_size;
+ short max_node_impact;
+};
+
+/* Container for hard regs subnodes of all objects. */
+static object_hard_regs_subnode_t object_hard_regs_subnodes;
+
+/* Table (preorder number of object hard registers node in the
+ forest, preorder number of object hard registers subnode) -> index
+ of the subnode relative to the node. -1 if it is not a
+ subnode. */
+static int *object_hard_regs_subnode_index;
+
+/* Setup arrays OBJECT_HARD_REGS_NODES and
+ OBJECT_HARD_REGS_SUBNODE_INDEX. */
+static void
+setup_object_hard_regs_subnode_index (object_hard_regs_node_t first)
+{
+ object_hard_regs_node_t node, parent;
+ int index;
-/* Pool for splay tree nodes. */
-static alloc_pool splay_tree_node_pool;
+ for (node = first; node != NULL; node = node->next)
+ {
+ object_hard_regs_nodes[node->preorder_num] = node;
+ for (parent = node; parent != NULL; parent = parent->parent)
+ {
+ index = parent->preorder_num * object_hard_regs_nodes_num;
+ object_hard_regs_subnode_index[index + node->preorder_num]
+ = node->preorder_num - parent->preorder_num;
+ }
+ setup_object_hard_regs_subnode_index (node->first);
+ }
+}
-/* When an allocno is removed from the splay tree, it is put in the
- following vector for subsequent inserting it into the splay tree
- after putting all colorable allocnos onto the stack. The allocno
- could be removed from and inserted to the splay tree every time
- when its spilling priority is changed but such solution would be
- more costly although simpler. */
-static VEC(ira_allocno_t,heap) *removed_splay_allocno_vec;
+/* Count all object hard registers nodes in tree ROOT. */
+static int
+get_object_hard_regs_subnodes_num (object_hard_regs_node_t root)
+{
+ int len = 1;
+
+ for (root = root->first; root != NULL; root = root->next)
+ len += get_object_hard_regs_subnodes_num (root);
+ return len;
+}
+
+/* Build the forest of object hard registers nodes and assign each
+ allocno a node from the forest. */
+static void
+form_object_hard_regs_nodes_forest (void)
+{
+ unsigned int i, j, size, len;
+ int start, k;
+ ira_allocno_t a;
+ object_hard_regs_t hv;
+ bitmap_iterator bi;
+ HARD_REG_SET temp;
+ object_hard_regs_node_t node, object_hard_regs_node;
+
+ node_check_tick = 0;
+ init_object_hard_regs ();
+ hard_regs_roots = NULL;
+ hard_regs_node_vec = VEC_alloc (object_hard_regs_node_t, heap, 100);
+ for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
+ if (! TEST_HARD_REG_BIT (ira_no_alloc_regs, i))
+ {
+ CLEAR_HARD_REG_SET (temp);
+ SET_HARD_REG_BIT (temp, i);
+ hv = add_object_hard_regs (temp, 0);
+ node = create_new_object_hard_regs_node (hv);
+ add_new_object_hard_regs_node_to_forest (&hard_regs_roots, node);
+ }
+ start = VEC_length (object_hard_regs_t, object_hard_regs_vec);
+ EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)
+ {
+ a = ira_allocnos[i];
+ for (k = 0; k < ALLOCNO_NUM_OBJECTS (a); k++)
+ {
+ ira_object_t obj = ALLOCNO_OBJECT (a, k);
+ object_color_data_t obj_data = OBJECT_COLOR_DATA (obj);
+
+ if (hard_reg_set_empty_p (obj_data->profitable_hard_regs))
+ continue;
+ hv = (add_object_hard_regs
+ (obj_data->profitable_hard_regs,
+ ALLOCNO_MEMORY_COST (a) - ALLOCNO_CLASS_COST (a)));
+ }
+ }
+ SET_HARD_REG_SET (temp);
+ AND_COMPL_HARD_REG_SET (temp, ira_no_alloc_regs);
+ add_object_hard_regs (temp, 0);
+ qsort (VEC_address (object_hard_regs_t, object_hard_regs_vec) + start,
+ VEC_length (object_hard_regs_t, object_hard_regs_vec) - start,
+ sizeof (object_hard_regs_t), object_hard_regs_compare);
+ for (i = start;
+ VEC_iterate (object_hard_regs_t, object_hard_regs_vec, i, hv);
+ i++)
+ {
+ add_object_hard_regs_to_forest (&hard_regs_roots, hv);
+ ira_assert (VEC_length (object_hard_regs_node_t,
+ hard_regs_node_vec) == 0);
+ }
+ /* We need to set up parent fields for right work of
+ first_common_ancestor_node. */
+ setup_object_hard_regs_nodes_parent (hard_regs_roots, NULL);
+ EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)
+ {
+ a = ira_allocnos[i];
+ for (k = 0; k < ALLOCNO_NUM_OBJECTS (a); k++)
+ {
+ ira_object_t obj = ALLOCNO_OBJECT (a, k);
+ object_color_data_t obj_data = OBJECT_COLOR_DATA (obj);
+
+ if (hard_reg_set_empty_p (obj_data->profitable_hard_regs))
+ continue;
+ VEC_truncate (object_hard_regs_node_t, hard_regs_node_vec, 0);
+ collect_object_hard_regs_cover (hard_regs_roots,
+ obj_data->profitable_hard_regs);
+ object_hard_regs_node = NULL;
+ for (j = 0;
+ VEC_iterate (object_hard_regs_node_t, hard_regs_node_vec,
+ j, node);
+ j++)
+ object_hard_regs_node
+ = (j == 0
+ ? node
+ : first_common_ancestor_node (node, object_hard_regs_node));
+ /* That is a temporary storage. */
+ object_hard_regs_node->used_p = true;
+ obj_data->hard_regs_node = object_hard_regs_node;
+ }
+ }
+ ira_assert (hard_regs_roots->next == NULL);
+ hard_regs_roots->used_p = true;
+ remove_unused_object_hard_regs_nodes (&hard_regs_roots);
+ object_hard_regs_nodes_num
+ = enumerate_object_hard_regs_nodes (hard_regs_roots, NULL, 0);
+ object_hard_regs_nodes
+ = ((object_hard_regs_node_t *)
+ ira_allocate (object_hard_regs_nodes_num
+ * sizeof (object_hard_regs_node_t)));
+ size = object_hard_regs_nodes_num * object_hard_regs_nodes_num;
+ object_hard_regs_subnode_index
+ = (int *) ira_allocate (size * sizeof (int));
+ for (i = 0; i < size; i++)
+ object_hard_regs_subnode_index[i] = -1;
+ setup_object_hard_regs_subnode_index (hard_regs_roots);
+ start = 0;
+ EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)
+ {
+ a = ira_allocnos[i];
+ for (k = 0; k < ALLOCNO_NUM_OBJECTS (a); k++)
+ {
+ ira_object_t obj = ALLOCNO_OBJECT (a, k);
+ object_color_data_t obj_data = OBJECT_COLOR_DATA (obj);
+
+ if (hard_reg_set_empty_p (obj_data->profitable_hard_regs))
+ continue;
+ len = get_object_hard_regs_subnodes_num (obj_data->hard_regs_node);
+ obj_data->hard_regs_subnodes_start = start;
+ obj_data->hard_regs_subnodes_num = len;
+ start += len;
+ }
+ }
+ object_hard_regs_subnodes
+ = ((object_hard_regs_subnode_t)
+ ira_allocate (sizeof (struct object_hard_regs_subnode) * start));
+ VEC_free (object_hard_regs_node_t, heap, hard_regs_node_vec);
+}
+
+/* Free tree of object hard registers nodes given by its ROOT. */
+static void
+finish_object_hard_regs_nodes_tree (object_hard_regs_node_t root)
+{
+ object_hard_regs_node_t child, next;
+
+ for (child = root->first; child != NULL; child = next)
+ {
+ next = child->next;
+ finish_object_hard_regs_nodes_tree (child);
+ }
+ ira_free (root);
+}
+
+/* Finish work with the forest of object hard registers nodes. */
+static void
+finish_object_hard_regs_nodes_forest (void)
+{
+ object_hard_regs_node_t node, next;
+
+ ira_free (object_hard_regs_subnodes);
+ for (node = hard_regs_roots; node != NULL; node = next)
+ {
+ next = node->next;
+ finish_object_hard_regs_nodes_tree (node);
+ }
+ ira_free (object_hard_regs_nodes);
+ ira_free (object_hard_regs_subnode_index);
+ finish_object_hard_regs ();
+}
+
+/* Set up left conflict sizes and left conflict subnodes sizes of hard
+ registers subnodes of allocno A. Return TRUE if allocno A is
+ trivially colorable. */
+static bool
+setup_left_conflict_sizes_p (ira_allocno_t a)
+{
+ int k, nobj, conflict_size;
+ allocno_color_data_t data;
+
+ nobj = ALLOCNO_NUM_OBJECTS (a);
+ conflict_size = 0;
+ data = ALLOCNO_COLOR_DATA (a);
+ for (k = 0; k < nobj; k++)
+ {
+ int i, node_preorder_num, start, left_conflict_subnodes_size;
+ HARD_REG_SET profitable_hard_regs;
+ object_hard_regs_subnode_t subnodes;
+ object_hard_regs_node_t node;
+ HARD_REG_SET node_set;
+ ira_object_t obj = ALLOCNO_OBJECT (a, k);
+ ira_object_t conflict_obj;
+ ira_object_conflict_iterator oci;
+ object_color_data_t obj_data;
+
+ node_check_tick++;
+ obj_data = OBJECT_COLOR_DATA (obj);
+ subnodes = object_hard_regs_subnodes + obj_data->hard_regs_subnodes_start;
+ COPY_HARD_REG_SET (profitable_hard_regs, obj_data->profitable_hard_regs);
+ node = obj_data->hard_regs_node;
+ node_preorder_num = node->preorder_num;
+ COPY_HARD_REG_SET (node_set, node->hard_regs->set);
+ FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)
+ {
+ int size;
+ ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj);
+ object_hard_regs_node_t conflict_node, temp_node;
+ HARD_REG_SET conflict_node_set;
+ object_color_data_t conflict_obj_data;
+
+ conflict_obj_data = OBJECT_COLOR_DATA (conflict_obj);
+ if (! ALLOCNO_COLOR_DATA (conflict_a)->in_graph_p
+ || ! hard_reg_set_intersect_p (profitable_hard_regs,
+ conflict_obj_data
+ ->profitable_hard_regs))
+ continue;
+ conflict_node = conflict_obj_data->hard_regs_node;
+ COPY_HARD_REG_SET (conflict_node_set, conflict_node->hard_regs->set);
+ if (hard_reg_set_subset_p (node_set, conflict_node_set))
+ temp_node = node;
+ else
+ {
+ ira_assert (hard_reg_set_subset_p (conflict_node_set, node_set));
+ temp_node = conflict_node;
+ }
+ if (temp_node->check != node_check_tick)
+ {
+ temp_node->check = node_check_tick;
+ temp_node->conflict_size = 0;
+ }
+ size = (ira_reg_class_max_nregs
+ [ALLOCNO_CLASS (conflict_a)][ALLOCNO_MODE (conflict_a)]);
+ if (ALLOCNO_NUM_OBJECTS (conflict_a) > 1)
+ /* We will deal with the subwords individually. */
+ size = 1;
+ temp_node->conflict_size += size;
+ }
+ for (i = 0; i < obj_data->hard_regs_subnodes_num; i++)
+ {
+ object_hard_regs_node_t temp_node;
+
+ temp_node = object_hard_regs_nodes[i + node_preorder_num];
+ ira_assert (temp_node->preorder_num == i + node_preorder_num);
+ subnodes[i].left_conflict_size = (temp_node->check != node_check_tick
+ ? 0 : temp_node->conflict_size);
+ if (hard_reg_set_subset_p (temp_node->hard_regs->set,
+ profitable_hard_regs))
+ subnodes[i].max_node_impact = temp_node->hard_regs_num;
+ else
+ {
+ HARD_REG_SET temp_set;
+ int j, n;
+ enum reg_class aclass;
+
+ COPY_HARD_REG_SET (temp_set, temp_node->hard_regs->set);
+ AND_HARD_REG_SET (temp_set, profitable_hard_regs);
+ aclass = ALLOCNO_CLASS (a);
+ for (n = 0, j = ira_class_hard_regs_num[aclass] - 1; j >= 0; j--)
+ if (TEST_HARD_REG_BIT (temp_set, ira_class_hard_regs[aclass][j]))
+ n++;
+ subnodes[i].max_node_impact = n;
+ }
+ subnodes[i].left_conflict_subnodes_size = 0;
+ }
+ start = node_preorder_num * object_hard_regs_nodes_num;
+ for (i = obj_data->hard_regs_subnodes_num - 1; i >= 0; i--)
+ {
+ int size, parent_i;
+ object_hard_regs_node_t parent;
+
+ size = (subnodes[i].left_conflict_subnodes_size
+ + MIN (subnodes[i].max_node_impact
+ - subnodes[i].left_conflict_subnodes_size,
+ subnodes[i].left_conflict_size));
+ parent = object_hard_regs_nodes[i + node_preorder_num]->parent;
+ if (parent == NULL)
+ continue;
+ parent_i
+ = object_hard_regs_subnode_index[start + parent->preorder_num];
+ if (parent_i < 0)
+ continue;
+ subnodes[parent_i].left_conflict_subnodes_size += size;
+ }
+ left_conflict_subnodes_size = subnodes[0].left_conflict_subnodes_size;
+ conflict_size
+ += (left_conflict_subnodes_size
+ + MIN (subnodes[0].max_node_impact - left_conflict_subnodes_size,
+ subnodes[0].left_conflict_size));
+ }
+ conflict_size += ira_reg_class_max_nregs[ALLOCNO_CLASS (a)][ALLOCNO_MODE (a)];
+ data->colorable_p = conflict_size <= data->available_regs_num;
+ return data->colorable_p;
+}
+
+/* Update left conflict sizes of hard registers subnodes of allocno A
+ after removing allocno containing object REMOVED_OBJ with SIZE from
+ the conflict graph. Return TRUE if A is trivially colorable. */
+static bool
+update_left_conflict_sizes_p (ira_allocno_t a,
+ ira_object_t removed_obj, int size)
+{
+ int i, k, conflict_size, before_conflict_size, diff, start;
+ int node_preorder_num, parent_i;
+ object_hard_regs_node_t node, removed_node, parent;
+ object_hard_regs_subnode_t subnodes;
+ allocno_color_data_t data = ALLOCNO_COLOR_DATA (a);
+ bool colorable_p = true;
+
+ ira_assert (! data->colorable_p);
+ for (k = 0; k < ALLOCNO_NUM_OBJECTS (a); k++)
+ {
+ ira_object_t obj = ALLOCNO_OBJECT (a, k);
+ object_color_data_t obj_data = OBJECT_COLOR_DATA (obj);
+
+ node = obj_data->hard_regs_node;
+ node_preorder_num = node->preorder_num;
+ removed_node = OBJECT_COLOR_DATA (removed_obj)->hard_regs_node;
+ if (! hard_reg_set_subset_p (removed_node->hard_regs->set,
+ node->hard_regs->set)
+ && ! hard_reg_set_subset_p (node->hard_regs->set,
+ removed_node->hard_regs->set))
+ /* It is a rare case which can happen for conflicting
+ multi-object allocnos where only one pair of objects might
+ conflict. */
+ continue;
+ start = node_preorder_num * object_hard_regs_nodes_num;
+ i = object_hard_regs_subnode_index[start + removed_node->preorder_num];
+ if (i < 0)
+ i = 0;
+ subnodes = object_hard_regs_subnodes + obj_data->hard_regs_subnodes_start;
+ before_conflict_size
+ = (subnodes[i].left_conflict_subnodes_size
+ + MIN (subnodes[i].max_node_impact
+ - subnodes[i].left_conflict_subnodes_size,
+ subnodes[i].left_conflict_size));
+ subnodes[i].left_conflict_size -= size;
+ for (;;)
+ {
+ conflict_size
+ = (subnodes[i].left_conflict_subnodes_size
+ + MIN (subnodes[i].max_node_impact
+ - subnodes[i].left_conflict_subnodes_size,
+ subnodes[i].left_conflict_size));
+ if ((diff = before_conflict_size - conflict_size) == 0)
+ break;
+ ira_assert (conflict_size < before_conflict_size);
+ parent = object_hard_regs_nodes[i + node_preorder_num]->parent;
+ if (parent == NULL)
+ break;
+ parent_i
+ = object_hard_regs_subnode_index[start + parent->preorder_num];
+ if (parent_i < 0)
+ break;
+ i = parent_i;
+ before_conflict_size
+ = (subnodes[i].left_conflict_subnodes_size
+ + MIN (subnodes[i].max_node_impact
+ - subnodes[i].left_conflict_subnodes_size,
+ subnodes[i].left_conflict_size));
+ subnodes[i].left_conflict_subnodes_size -= diff;
+ }
+ if (i != 0
+ || (conflict_size
+ + ira_reg_class_max_nregs[ALLOCNO_CLASS (a)][ALLOCNO_MODE (a)]
+ > data->available_regs_num))
+ {
+ colorable_p = false;
+ break;
+ }
+ }
+ if (colorable_p)
+ {
+ data->colorable_p = true;
+ return true;
+ }
+ return false;
+}
-/* Helper for qsort comparison callbacks - return a positive integer if
- X > Y, or a negative value otherwise. Use a conditional expression
- instead of a difference computation to insulate from possible overflow
- issues, e.g. X - Y < 0 for some X > 0 and Y < 0. */
-#define SORTGT(x,y) (((x) > (y)) ? 1 : -1)
+/* Return true if allocno A has an object with empty profitable hard
+ regs. */
+static bool
+empty_profitable_hard_regs (ira_allocno_t a)
+{
+ int k, nobj;
-\f
+ nobj = ALLOCNO_NUM_OBJECTS (a);
+ for (k = 0; k < nobj; k++)
+ {
+ ira_object_t obj = ALLOCNO_OBJECT (a, k);
+ object_color_data_t obj_data = OBJECT_COLOR_DATA (obj);
-/* This page contains functions used to find conflicts using allocno
- live ranges. */
+ if (hard_reg_set_empty_p (obj_data->profitable_hard_regs))
+ return true;
+ }
+ return false;
+}
-/* Return TRUE if live ranges of allocnos A1 and A2 intersect. It is
- used to find a conflict for new allocnos or allocnos with the
- different cover classes. */
-static bool
-allocnos_have_intersected_live_ranges_p (ira_allocno_t a1, ira_allocno_t a2)
+/* Set up profitable hard registers for each allocno being
+ colored. */
+static void
+setup_profitable_hard_regs (void)
{
- int i, j;
- int n1 = ALLOCNO_NUM_OBJECTS (a1);
- int n2 = ALLOCNO_NUM_OBJECTS (a2);
+ unsigned int i;
+ int j, k, nobj, hard_regno, nregs, class_size;
+ ira_allocno_t a;
+ bitmap_iterator bi;
+ enum reg_class aclass;
+ enum machine_mode mode;
- if (a1 == a2)
- return false;
- if (ALLOCNO_REG (a1) != NULL && ALLOCNO_REG (a2) != NULL
- && (ORIGINAL_REGNO (ALLOCNO_REG (a1))
- == ORIGINAL_REGNO (ALLOCNO_REG (a2))))
- return false;
+ /* Initial set up from allocno classes and explicitly conflicting
+ hard regs. */
+ EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)
+ {
+ a = ira_allocnos[i];
+ if ((aclass = ALLOCNO_CLASS (a)) == NO_REGS)
+ continue;
+ mode = ALLOCNO_MODE (a);
+ nobj = ALLOCNO_NUM_OBJECTS (a);
+ for (k = 0; k < nobj; k++)
+ {
+ ira_object_t obj = ALLOCNO_OBJECT (a, k);
+ object_color_data_t obj_data = OBJECT_COLOR_DATA (obj);
- for (i = 0; i < n1; i++)
+ if (ALLOCNO_UPDATED_HARD_REG_COSTS (a) == NULL
+ && ALLOCNO_CLASS_COST (a) > ALLOCNO_MEMORY_COST (a))
+ CLEAR_HARD_REG_SET (obj_data->profitable_hard_regs);
+ else
+ {
+ COPY_HARD_REG_SET (obj_data->profitable_hard_regs,
+ reg_class_contents[aclass]);
+ AND_COMPL_HARD_REG_SET (obj_data->profitable_hard_regs,
+ ira_no_alloc_regs);
+ AND_COMPL_HARD_REG_SET (obj_data->profitable_hard_regs,
+ OBJECT_TOTAL_CONFLICT_HARD_REGS (obj));
+ }
+ }
+ }
+ /* Exclude hard regs already assigned for conflicting objects. */
+ EXECUTE_IF_SET_IN_BITMAP (consideration_allocno_bitmap, 0, i, bi)
{
- ira_object_t c1 = ALLOCNO_OBJECT (a1, i);
- for (j = 0; j < n2; j++)
+ a = ira_allocnos[i];
+ if ((aclass = ALLOCNO_CLASS (a)) == NO_REGS
+ || ! ALLOCNO_ASSIGNED_P (a)
+ || (hard_regno = ALLOCNO_HARD_REGNO (a)) < 0)
+ continue;
+ mode = ALLOCNO_MODE (a);
+ nregs = hard_regno_nregs[hard_regno][mode];
+ nobj = ALLOCNO_NUM_OBJECTS (a);
+ for (k = 0; k < nobj; k++)
{
- ira_object_t c2 = ALLOCNO_OBJECT (a2, j);
- if (ira_live_ranges_intersect_p (OBJECT_LIVE_RANGES (c1),
- OBJECT_LIVE_RANGES (c2)))
- return true;
+ ira_object_t obj = ALLOCNO_OBJECT (a, k);
+ ira_object_t conflict_obj;
+ ira_object_conflict_iterator oci;
+
+ FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)
+ {
+ if (nregs == nobj && nregs > 1)
+ {
+ int num = OBJECT_SUBWORD (conflict_obj);
+
+ if (WORDS_BIG_ENDIAN)
+ CLEAR_HARD_REG_BIT
+ (OBJECT_COLOR_DATA (conflict_obj)->profitable_hard_regs,
+ hard_regno + nobj - num - 1);
+ else
+ CLEAR_HARD_REG_BIT
+ (OBJECT_COLOR_DATA (conflict_obj)->profitable_hard_regs,
+ hard_regno + num);
+ }
+ else
+ AND_COMPL_HARD_REG_SET
+ (OBJECT_COLOR_DATA (conflict_obj)->profitable_hard_regs,
+ ira_reg_mode_hard_regset[hard_regno][mode]);
+ }
}
}
- return false;
-}
+ /* Exclude too costly hard regs. */
+ EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)
+ {
+ int min_cost = INT_MAX;
+ int *costs;
-#ifdef ENABLE_IRA_CHECKING
+ a = ira_allocnos[i];
+ if ((aclass = ALLOCNO_CLASS (a)) == NO_REGS
+ || empty_profitable_hard_regs (a))
+ continue;
+ mode = ALLOCNO_MODE (a);
+ nobj = ALLOCNO_NUM_OBJECTS (a);
+ for (k = 0; k < nobj; k++)
+ {
+ ira_object_t obj = ALLOCNO_OBJECT (a, k);
+ object_color_data_t obj_data = OBJECT_COLOR_DATA (obj);
-/* Return TRUE if live ranges of pseudo-registers REGNO1 and REGNO2
- intersect. This should be used when there is only one region.
- Currently this is used during reload. */
-static bool
-pseudos_have_intersected_live_ranges_p (int regno1, int regno2)
-{
- ira_allocno_t a1, a2;
+ if ((costs = ALLOCNO_UPDATED_HARD_REG_COSTS (a)) != NULL
+ || (costs = ALLOCNO_HARD_REG_COSTS (a)) != NULL)
+ {
+ class_size = ira_class_hard_regs_num[aclass];
+ for (j = 0; j < class_size; j++)
+ {
+ hard_regno = ira_class_hard_regs[aclass][j];
+ nregs = hard_regno_nregs[hard_regno][mode];
+ if (nregs == nobj && nregs > 1)
+ {
+ int num = OBJECT_SUBWORD (obj);
- ira_assert (regno1 >= FIRST_PSEUDO_REGISTER
- && regno2 >= FIRST_PSEUDO_REGISTER);
- /* Reg info caclulated by dataflow infrastructure can be different
- from one calculated by regclass. */
- if ((a1 = ira_loop_tree_root->regno_allocno_map[regno1]) == NULL
- || (a2 = ira_loop_tree_root->regno_allocno_map[regno2]) == NULL)
- return false;
- return allocnos_have_intersected_live_ranges_p (a1, a2);
+ if (WORDS_BIG_ENDIAN)
+ hard_regno += nobj - num - 1;
+ else
+ hard_regno += num;
+ }
+ if (! TEST_HARD_REG_BIT (obj_data->profitable_hard_regs,
+ hard_regno))
+ continue;
+ if (ALLOCNO_UPDATED_MEMORY_COST (a) < costs[j])
+ CLEAR_HARD_REG_BIT (obj_data->profitable_hard_regs,
+ hard_regno);
+ else if (min_cost > costs[j])
+ min_cost = costs[j];
+ }
+ }
+ else if (ALLOCNO_UPDATED_MEMORY_COST (a)
+ < ALLOCNO_UPDATED_CLASS_COST (a))
+ CLEAR_HARD_REG_SET (obj_data->profitable_hard_regs);
+ }
+ if (ALLOCNO_UPDATED_CLASS_COST (a) > min_cost)
+ ALLOCNO_UPDATED_CLASS_COST (a) = min_cost;
+ }
}
-#endif
-
\f
/* This page contains functions used to choose hard registers for
static bool allocated_hardreg_p[FIRST_PSEUDO_REGISTER];
/* Describes one element in a queue of allocnos whose costs need to be
- updated. Each allocno in the queue is known to have a cover class. */
+ updated. Each allocno in the queue is known to have an allocno
+ class. */
struct update_cost_queue_elem
{
/* This element is in the queue iff CHECK == update_cost_check. */
update_cost_queue = NULL;
}
-/* Add (ALLOCNO, DIVISOR) to the end of update_cost_queue,
- unless ALLOCNO is already in the queue, or has no cover class. */
+/* Add (ALLOCNO, DIVISOR) to the end of update_cost_queue, unless
+ ALLOCNO is already in the queue, or has NO_REGS class. */
static inline void
queue_update_cost (ira_allocno_t allocno, int divisor)
{
elem = &update_cost_queue_elems[ALLOCNO_NUM (allocno)];
if (elem->check != update_cost_check
- && ALLOCNO_COVER_CLASS (allocno) != NO_REGS)
+ && ALLOCNO_CLASS (allocno) != NO_REGS)
{
elem->check = update_cost_check;
elem->divisor = divisor;
{
int i, cost, update_cost, hard_regno, divisor;
enum machine_mode mode;
- enum reg_class rclass, cover_class;
+ enum reg_class rclass, aclass;
ira_allocno_t another_allocno;
ira_copy_t cp, next_cp;
hard_regno = ALLOCNO_HARD_REGNO (allocno);
ira_assert (hard_regno >= 0);
- cover_class = ALLOCNO_COVER_CLASS (allocno);
- if (cover_class == NO_REGS)
+ aclass = ALLOCNO_CLASS (allocno);
+ if (aclass == NO_REGS)
return;
- i = ira_class_hard_reg_index[cover_class][hard_regno];
+ i = ira_class_hard_reg_index[aclass][hard_regno];
ira_assert (i >= 0);
rclass = REGNO_REG_CLASS (hard_regno);
do
{
mode = ALLOCNO_MODE (allocno);
+ ira_init_register_move_cost_if_necessary (mode);
for (cp = ALLOCNO_COPIES (allocno); cp != NULL; cp = next_cp)
{
if (cp->first == allocno)
else
gcc_unreachable ();
- cover_class = ALLOCNO_COVER_CLASS (another_allocno);
- if (! TEST_HARD_REG_BIT (reg_class_contents[cover_class],
+ aclass = ALLOCNO_CLASS (another_allocno);
+ if (! TEST_HARD_REG_BIT (reg_class_contents[aclass],
hard_regno)
|| ALLOCNO_ASSIGNED_P (another_allocno))
continue;
cost = (cp->second == allocno
- ? ira_get_register_move_cost (mode, rclass, cover_class)
- : ira_get_register_move_cost (mode, cover_class, rclass));
+ ? ira_register_move_cost[mode][rclass][aclass]
+ : ira_register_move_cost[mode][aclass][rclass]);
if (decr_p)
cost = -cost;
continue;
ira_allocate_and_set_or_copy_costs
- (&ALLOCNO_UPDATED_HARD_REG_COSTS (another_allocno), cover_class,
- ALLOCNO_UPDATED_COVER_CLASS_COST (another_allocno),
+ (&ALLOCNO_UPDATED_HARD_REG_COSTS (another_allocno), aclass,
+ ALLOCNO_UPDATED_CLASS_COST (another_allocno),
ALLOCNO_HARD_REG_COSTS (another_allocno));
ira_allocate_and_set_or_copy_costs
(&ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (another_allocno),
- cover_class, 0,
- ALLOCNO_CONFLICT_HARD_REG_COSTS (another_allocno));
- i = ira_class_hard_reg_index[cover_class][hard_regno];
- ira_assert (i >= 0);
+ aclass, 0, ALLOCNO_CONFLICT_HARD_REG_COSTS (another_allocno));
+ i = ira_class_hard_reg_index[aclass][hard_regno];
+ if (i < 0)
+ continue;
ALLOCNO_UPDATED_HARD_REG_COSTS (another_allocno)[i] += update_cost;
ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (another_allocno)[i]
+= update_cost;
}
/* This function updates COSTS (decrease if DECR_P) for hard_registers
- of COVER_CLASS by conflict costs of the unassigned allocnos
+ of ACLASS by conflict costs of the unassigned allocnos
connected by copies with allocnos in update_cost_queue. This
update increases chances to remove some copies. */
static void
-update_conflict_hard_regno_costs (int *costs, enum reg_class cover_class,
+update_conflict_hard_regno_costs (int *costs, enum reg_class aclass,
bool decr_p)
{
int i, cost, class_size, freq, mult, div, divisor;
int index, hard_regno;
int *conflict_costs;
bool cont_p;
- enum reg_class another_cover_class;
+ enum reg_class another_aclass;
ira_allocno_t allocno, another_allocno;
ira_copy_t cp, next_cp;
}
else
gcc_unreachable ();
- another_cover_class = ALLOCNO_COVER_CLASS (another_allocno);
- if (! ira_reg_classes_intersect_p[cover_class][another_cover_class]
+ another_aclass = ALLOCNO_CLASS (another_allocno);
+ if (! ira_reg_classes_intersect_p[aclass][another_aclass]
|| ALLOCNO_ASSIGNED_P (another_allocno)
- || ALLOCNO_MAY_BE_SPILLED_P (another_allocno))
+ || ALLOCNO_COLOR_DATA (another_allocno)->may_be_spilled_p)
continue;
- class_size = ira_class_hard_regs_num[another_cover_class];
+ class_size = ira_class_hard_regs_num[another_aclass];
ira_allocate_and_copy_costs
(&ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (another_allocno),
- another_cover_class,
- ALLOCNO_CONFLICT_HARD_REG_COSTS (another_allocno));
+ another_aclass, ALLOCNO_CONFLICT_HARD_REG_COSTS (another_allocno));
conflict_costs
= ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (another_allocno);
if (conflict_costs == NULL)
cont_p = false;
for (i = class_size - 1; i >= 0; i--)
{
- hard_regno = ira_class_hard_regs[another_cover_class][i];
+ hard_regno = ira_class_hard_regs[another_aclass][i];
ira_assert (hard_regno >= 0);
- index = ira_class_hard_reg_index[cover_class][hard_regno];
+ index = ira_class_hard_reg_index[aclass][hard_regno];
if (index < 0)
continue;
cost = conflict_costs [i] * mult / div;
}
}
+/* Set up conflicting and profitable regs (through CONFLICT_REGS and
+ PROFITABLE_REGS) for each object of allocno A. Remember that the
+ profitable regs exclude hard regs which can not hold value of mode
+ of allocno A. */
+static inline void
+get_conflict_profitable_regs (ira_allocno_t a, bool retry_p,
+ HARD_REG_SET *conflict_regs,
+ HARD_REG_SET *profitable_regs)
+{
+ int i, nwords;
+ ira_object_t obj;
+
+ nwords = ALLOCNO_NUM_OBJECTS (a);
+ for (i = 0; i < nwords; i++)
+ {
+ obj = ALLOCNO_OBJECT (a, i);
+ COPY_HARD_REG_SET (conflict_regs[i],
+ OBJECT_TOTAL_CONFLICT_HARD_REGS (obj));
+ if (retry_p)
+ {
+ COPY_HARD_REG_SET (profitable_regs[i],
+ reg_class_contents[ALLOCNO_CLASS (a)]);
+ AND_COMPL_HARD_REG_SET (profitable_regs[i],
+ ira_prohibited_class_mode_regs
+ [ALLOCNO_CLASS (a)][ALLOCNO_MODE (a)]);
+ }
+ else
+ COPY_HARD_REG_SET (profitable_regs[i],
+ OBJECT_COLOR_DATA (obj)->profitable_hard_regs);
+ }
+}
+
+/* Return true if HARD_REGNO is ok for assigning to allocno A whose
+ objects have corresponding CONFLICT_REGS and PROFITABLE_REGS. */
+static inline bool
+check_hard_reg_p (ira_allocno_t a, int hard_regno,
+ HARD_REG_SET *conflict_regs, HARD_REG_SET *profitable_regs)
+{
+ int j, nwords, nregs;
+ enum reg_class aclass;
+ enum machine_mode mode;
+
+ aclass = ALLOCNO_CLASS (a);
+ mode = ALLOCNO_MODE (a);
+ if (TEST_HARD_REG_BIT (ira_prohibited_class_mode_regs[aclass][mode],
+ hard_regno))
+ return false;
+ nregs = hard_regno_nregs[hard_regno][mode];
+ nwords = ALLOCNO_NUM_OBJECTS (a);
+ for (j = 0; j < nregs; j++)
+ {
+ int k;
+ int set_to_test_start = 0, set_to_test_end = nwords;
+
+ if (nregs == nwords)
+ {
+ if (WORDS_BIG_ENDIAN)
+ set_to_test_start = nwords - j - 1;
+ else
+ set_to_test_start = j;
+ set_to_test_end = set_to_test_start + 1;
+ }
+ for (k = set_to_test_start; k < set_to_test_end; k++)
+ /* Checking only profitable hard regs. */
+ if (TEST_HARD_REG_BIT (conflict_regs[k], hard_regno + j)
+ || ! TEST_HARD_REG_BIT (profitable_regs[k], hard_regno + j))
+ break;
+ if (k != set_to_test_end)
+ break;
+ }
+ return j == nregs;
+}
+#ifndef HONOR_REG_ALLOC_ORDER
+
+/* Return number of registers needed to be saved and restored at
+ function prologue/epilogue if we allocate HARD_REGNO to hold value
+ of MODE. */
+static int
+calculate_saved_nregs (int hard_regno, enum machine_mode mode)
+{
+ int i;
+ int nregs = 0;
+
+ ira_assert (hard_regno >= 0);
+ for (i = hard_regno_nregs[hard_regno][mode] - 1; i >= 0; i--)
+ if (!allocated_hardreg_p[hard_regno + i]
+ && !TEST_HARD_REG_BIT (call_used_reg_set, hard_regno + i)
+ && !LOCAL_REGNO (hard_regno + i))
+ nregs++;
+ return nregs;
+}
+#endif
+
/* Choose a hard register for allocno A. If RETRY_P is TRUE, it means
that the function called from function
- `ira_reassign_conflict_allocnos' and `allocno_reload_assign'. */
+ `ira_reassign_conflict_allocnos' and `allocno_reload_assign'. In
+ this case some allocno data are not defined or updated and we
+ should not touch these data. The function returns true if we
+ managed to assign a hard register to the allocno.
+
+ To assign a hard register, first of all we calculate all conflict
+ hard registers which can come from conflicting allocnos with
+ already assigned hard registers. After that we find first free
+ hard register with the minimal cost. During hard register cost
+ calculation we take conflict hard register costs into account to
+ give a chance for conflicting allocnos to get a better hard
+ register in the future.
+
+ If the best hard register cost is bigger than cost of memory usage
+ for the allocno, we don't assign a hard register to given allocno
+ at all.
+
+ If we assign a hard register to the allocno, we update costs of the
+ hard register for allocnos connected by copies to improve a chance
+ to coalesce insns represented by the copies when we assign hard
+ registers to the allocnos connected by the copies. */
static bool
assign_hard_reg (ira_allocno_t a, bool retry_p)
{
- HARD_REG_SET conflicting_regs[2];
- int i, j, hard_regno, nregs, best_hard_regno, class_size;
+ HARD_REG_SET conflicting_regs[2], profitable_hard_regs[2];
+ int i, j, hard_regno, best_hard_regno, class_size;
int cost, mem_cost, min_cost, full_cost, min_full_cost, nwords, word;
int *a_costs;
- enum reg_class cover_class;
+ enum reg_class aclass;
enum machine_mode mode;
static int costs[FIRST_PSEUDO_REGISTER], full_costs[FIRST_PSEUDO_REGISTER];
#ifndef HONOR_REG_ALLOC_ORDER
+ int saved_nregs;
enum reg_class rclass;
int add_cost;
#endif
bool no_stack_reg_p;
#endif
- nwords = ALLOCNO_NUM_OBJECTS (a);
ira_assert (! ALLOCNO_ASSIGNED_P (a));
- cover_class = ALLOCNO_COVER_CLASS (a);
- class_size = ira_class_hard_regs_num[cover_class];
- mode = ALLOCNO_MODE (a);
- for (i = 0; i < nwords; i++)
- CLEAR_HARD_REG_SET (conflicting_regs[i]);
+ get_conflict_profitable_regs (a, retry_p,
+ conflicting_regs, profitable_hard_regs);
+ aclass = ALLOCNO_CLASS (a);
+ class_size = ira_class_hard_regs_num[aclass];
best_hard_regno = -1;
memset (full_costs, 0, sizeof (int) * class_size);
mem_cost = 0;
#ifdef STACK_REGS
no_stack_reg_p = false;
#endif
- start_update_cost ();
+ if (! retry_p)
+ start_update_cost ();
mem_cost += ALLOCNO_UPDATED_MEMORY_COST (a);
ira_allocate_and_copy_costs (&ALLOCNO_UPDATED_HARD_REG_COSTS (a),
- cover_class, ALLOCNO_HARD_REG_COSTS (a));
+ aclass, ALLOCNO_HARD_REG_COSTS (a));
a_costs = ALLOCNO_UPDATED_HARD_REG_COSTS (a);
#ifdef STACK_REGS
no_stack_reg_p = no_stack_reg_p || ALLOCNO_TOTAL_NO_STACK_REG_P (a);
#endif
- cost = ALLOCNO_UPDATED_COVER_CLASS_COST (a);
+ cost = ALLOCNO_UPDATED_CLASS_COST (a);
for (i = 0; i < class_size; i++)
if (a_costs != NULL)
{
costs[i] += cost;
full_costs[i] += cost;
}
+ nwords = ALLOCNO_NUM_OBJECTS (a);
for (word = 0; word < nwords; word++)
{
ira_object_t conflict_obj;
ira_object_t obj = ALLOCNO_OBJECT (a, word);
ira_object_conflict_iterator oci;
- IOR_HARD_REG_SET (conflicting_regs[word],
- OBJECT_TOTAL_CONFLICT_HARD_REGS (obj));
/* Take preferences of conflicting allocnos into account. */
FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)
- {
+ {
ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj);
- enum reg_class conflict_cover_class;
-
+ enum reg_class conflict_aclass;
+
/* Reload can give another class so we need to check all
allocnos. */
- if (!retry_p && !bitmap_bit_p (consideration_allocno_bitmap,
- ALLOCNO_NUM (conflict_a)))
+ if (!retry_p
+ && (!bitmap_bit_p (consideration_allocno_bitmap,
+ ALLOCNO_NUM (conflict_a))
+ || ((!ALLOCNO_ASSIGNED_P (conflict_a)
+ || ALLOCNO_HARD_REGNO (conflict_a) < 0)
+ && !(hard_reg_set_intersect_p
+ (profitable_hard_regs[word],
+ OBJECT_COLOR_DATA
+ (conflict_obj)->profitable_hard_regs)))))
continue;
- conflict_cover_class = ALLOCNO_COVER_CLASS (conflict_a);
+ conflict_aclass = ALLOCNO_CLASS (conflict_a);
ira_assert (ira_reg_classes_intersect_p
- [cover_class][conflict_cover_class]);
+ [aclass][conflict_aclass]);
if (ALLOCNO_ASSIGNED_P (conflict_a))
{
hard_regno = ALLOCNO_HARD_REGNO (conflict_a);
if (hard_regno >= 0
- && ira_class_hard_reg_index[cover_class][hard_regno] >= 0)
+ && (ira_hard_reg_set_intersection_p
+ (hard_regno, ALLOCNO_MODE (conflict_a),
+ reg_class_contents[aclass])))
{
- enum machine_mode mode = ALLOCNO_MODE (conflict_a);
- int conflict_nregs = hard_regno_nregs[hard_regno][mode];
int n_objects = ALLOCNO_NUM_OBJECTS (conflict_a);
-
+ int conflict_nregs;
+
+ mode = ALLOCNO_MODE (conflict_a);
+ conflict_nregs = hard_regno_nregs[hard_regno][mode];
if (conflict_nregs == n_objects && conflict_nregs > 1)
{
int num = OBJECT_SUBWORD (conflict_obj);
IOR_HARD_REG_SET
(conflicting_regs[word],
ira_reg_mode_hard_regset[hard_regno][mode]);
- if (hard_reg_set_subset_p (reg_class_contents[cover_class],
+ if (hard_reg_set_subset_p (profitable_hard_regs[word],
conflicting_regs[word]))
goto fail;
}
}
- else if (! ALLOCNO_MAY_BE_SPILLED_P (conflict_a))
+ else if (! retry_p
+ && ! ALLOCNO_COLOR_DATA (conflict_a)->may_be_spilled_p)
{
int k, *conflict_costs;
ira_allocate_and_copy_costs
(&ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (conflict_a),
- conflict_cover_class,
+ conflict_aclass,
ALLOCNO_CONFLICT_HARD_REG_COSTS (conflict_a));
conflict_costs
= ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (conflict_a);
if (conflict_costs != NULL)
for (j = class_size - 1; j >= 0; j--)
{
- hard_regno = ira_class_hard_regs[cover_class][j];
+ hard_regno = ira_class_hard_regs[aclass][j];
ira_assert (hard_regno >= 0);
- k = (ira_class_hard_reg_index
- [conflict_cover_class][hard_regno]);
+ k = ira_class_hard_reg_index[conflict_aclass][hard_regno];
if (k < 0)
continue;
full_costs[j] -= conflict_costs[k];
}
}
}
- /* Take into account preferences of allocnos connected by copies to
- the conflict allocnos. */
- update_conflict_hard_regno_costs (full_costs, cover_class, true);
+ if (! retry_p)
+ /* Take into account preferences of allocnos connected by copies to
+ the conflict allocnos. */
+ update_conflict_hard_regno_costs (full_costs, aclass, true);
/* Take preferences of allocnos connected by copies into
account. */
- start_update_cost ();
- queue_update_cost (a, COST_HOP_DIVISOR);
- update_conflict_hard_regno_costs (full_costs, cover_class, false);
+ if (! retry_p)
+ {
+ start_update_cost ();
+ queue_update_cost (a, COST_HOP_DIVISOR);
+ update_conflict_hard_regno_costs (full_costs, aclass, false);
+ }
min_cost = min_full_cost = INT_MAX;
/* We don't care about giving callee saved registers to allocnos no
living through calls because call clobbered registers are
allocated first (it is usual practice to put them first in
REG_ALLOC_ORDER). */
+ mode = ALLOCNO_MODE (a);
for (i = 0; i < class_size; i++)
{
- hard_regno = ira_class_hard_regs[cover_class][i];
- nregs = hard_regno_nregs[hard_regno][ALLOCNO_MODE (a)];
+ hard_regno = ira_class_hard_regs[aclass][i];
#ifdef STACK_REGS
if (no_stack_reg_p
&& FIRST_STACK_REG <= hard_regno && hard_regno <= LAST_STACK_REG)
continue;
#endif
- if (TEST_HARD_REG_BIT (prohibited_class_mode_regs[cover_class][mode],
- hard_regno))
- continue;
- for (j = 0; j < nregs; j++)
- {
- int k;
- int set_to_test_start = 0, set_to_test_end = nwords;
- if (nregs == nwords)
- {
- if (WORDS_BIG_ENDIAN)
- set_to_test_start = nwords - j - 1;
- else
- set_to_test_start = j;
- set_to_test_end = set_to_test_start + 1;
- }
- for (k = set_to_test_start; k < set_to_test_end; k++)
- if (TEST_HARD_REG_BIT (conflicting_regs[k], hard_regno + j))
- break;
- if (k != set_to_test_end)
- break;
- }
- if (j != nregs)
+ if (! check_hard_reg_p (a, hard_regno,
+ conflicting_regs, profitable_hard_regs))
continue;
cost = costs[i];
full_cost = full_costs[i];
#ifndef HONOR_REG_ALLOC_ORDER
- if (! allocated_hardreg_p[hard_regno]
- && ira_hard_reg_not_in_set_p (hard_regno, mode, call_used_reg_set))
+ if ((saved_nregs = calculate_saved_nregs (hard_regno, mode)) != 0)
/* We need to save/restore the hard register in
epilogue/prologue. Therefore we increase the cost. */
{
- /* ??? If only part is call clobbered. */
rclass = REGNO_REG_CLASS (hard_regno);
- add_cost = (ira_memory_move_cost[mode][rclass][0]
- + ira_memory_move_cost[mode][rclass][1] - 1);
+ add_cost = ((ira_memory_move_cost[mode][rclass][0]
+ + ira_memory_move_cost[mode][rclass][1])
+ * saved_nregs / hard_regno_nregs[hard_regno][mode] - 1);
cost += add_cost;
full_cost += add_cost;
}
}
fail:
if (best_hard_regno >= 0)
- allocated_hardreg_p[best_hard_regno] = true;
+ {
+ for (i = hard_regno_nregs[best_hard_regno][mode] - 1; i >= 0; i--)
+ allocated_hardreg_p[best_hard_regno + 1] = true;
+ }
ALLOCNO_HARD_REGNO (a) = best_hard_regno;
ALLOCNO_ASSIGNED_P (a) = true;
if (best_hard_regno >= 0)
update_copy_costs (a, true);
+ ira_assert (ALLOCNO_CLASS (a) == aclass);
/* We don't need updated costs anymore: */
ira_free_allocno_updated_costs (a);
return best_hard_regno >= 0;
spilling. */
static ira_allocno_t uncolorable_allocno_bucket;
-/* Each element of the array contains the current number of allocnos
- of given *cover* class in the uncolorable_bucket. */
-static int uncolorable_allocnos_num[N_REG_CLASSES];
+/* The current number of allocnos in the uncolorable_bucket. */
+static int uncolorable_allocnos_num;
/* Return the current spill priority of allocno A. The less the
number, the more preferable the allocno for spilling. */
-static int
+static inline int
allocno_spill_priority (ira_allocno_t a)
{
- return (ALLOCNO_TEMP (a)
- / (ALLOCNO_LEFT_CONFLICTS_SIZE (a)
- * ira_reg_class_nregs[ALLOCNO_COVER_CLASS (a)][ALLOCNO_MODE (a)]
+ allocno_color_data_t data = ALLOCNO_COLOR_DATA (a);
+
+ return (data->temp
+ / (ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (a)
+ * ira_reg_class_max_nregs[ALLOCNO_CLASS (a)][ALLOCNO_MODE (a)]
+ 1));
}
-/* Add ALLOCNO to bucket *BUCKET_PTR. ALLOCNO should be not in a bucket
+/* Add allocno A to bucket *BUCKET_PTR. A should be not in a bucket
before the call. */
static void
-add_allocno_to_bucket (ira_allocno_t allocno, ira_allocno_t *bucket_ptr)
+add_allocno_to_bucket (ira_allocno_t a, ira_allocno_t *bucket_ptr)
{
- ira_allocno_t first_allocno;
- enum reg_class cover_class;
+ ira_allocno_t first_a;
+ allocno_color_data_t data;
if (bucket_ptr == &uncolorable_allocno_bucket
- && (cover_class = ALLOCNO_COVER_CLASS (allocno)) != NO_REGS)
+ && ALLOCNO_CLASS (a) != NO_REGS)
{
- uncolorable_allocnos_num[cover_class]++;
- ira_assert (uncolorable_allocnos_num[cover_class] > 0);
+ uncolorable_allocnos_num++;
+ ira_assert (uncolorable_allocnos_num > 0);
}
- first_allocno = *bucket_ptr;
- ALLOCNO_NEXT_BUCKET_ALLOCNO (allocno) = first_allocno;
- ALLOCNO_PREV_BUCKET_ALLOCNO (allocno) = NULL;
- if (first_allocno != NULL)
- ALLOCNO_PREV_BUCKET_ALLOCNO (first_allocno) = allocno;
- *bucket_ptr = allocno;
+ first_a = *bucket_ptr;
+ data = ALLOCNO_COLOR_DATA (a);
+ data->next_bucket_allocno = first_a;
+ data->prev_bucket_allocno = NULL;
+ if (first_a != NULL)
+ ALLOCNO_COLOR_DATA (first_a)->prev_bucket_allocno = a;
+ *bucket_ptr = a;
}
/* Compare two allocnos to define which allocno should be pushed first
ira_allocno_t a2 = *(const ira_allocno_t *) v2p;
int diff, a1_freq, a2_freq, a1_num, a2_num;
- if ((diff = (int) ALLOCNO_COVER_CLASS (a2) - ALLOCNO_COVER_CLASS (a1)) != 0)
+ if ((diff = (int) ALLOCNO_CLASS (a2) - ALLOCNO_CLASS (a1)) != 0)
return diff;
a1_freq = ALLOCNO_FREQ (a1);
- a1_num = ALLOCNO_AVAILABLE_REGS_NUM (a1);
a2_freq = ALLOCNO_FREQ (a2);
- a2_num = ALLOCNO_AVAILABLE_REGS_NUM (a2);
- if ((diff = a2_num - a1_num) != 0)
+ if ((diff = a1_freq - a2_freq) != 0)
return diff;
- else if ((diff = a1_freq - a2_freq) != 0)
+ a1_num = ALLOCNO_COLOR_DATA (a1)->available_regs_num;
+ a2_num = ALLOCNO_COLOR_DATA (a2)->available_regs_num;
+ if ((diff = a2_num - a1_num) != 0)
return diff;
return ALLOCNO_NUM (a2) - ALLOCNO_NUM (a1);
}
/* Sort bucket *BUCKET_PTR and return the result through
BUCKET_PTR. */
static void
-sort_bucket (ira_allocno_t *bucket_ptr)
+sort_bucket (ira_allocno_t *bucket_ptr,
+ int (*compare_func) (const void *, const void *))
{
ira_allocno_t a, head;
int n;
- for (n = 0, a = *bucket_ptr; a != NULL; a = ALLOCNO_NEXT_BUCKET_ALLOCNO (a))
+ for (n = 0, a = *bucket_ptr;
+ a != NULL;
+ a = ALLOCNO_COLOR_DATA (a)->next_bucket_allocno)
sorted_allocnos[n++] = a;
if (n <= 1)
return;
- qsort (sorted_allocnos, n, sizeof (ira_allocno_t),
- bucket_allocno_compare_func);
+ qsort (sorted_allocnos, n, sizeof (ira_allocno_t), compare_func);
head = NULL;
for (n--; n >= 0; n--)
{
a = sorted_allocnos[n];
- ALLOCNO_NEXT_BUCKET_ALLOCNO (a) = head;
- ALLOCNO_PREV_BUCKET_ALLOCNO (a) = NULL;
+ ALLOCNO_COLOR_DATA (a)->next_bucket_allocno = head;
+ ALLOCNO_COLOR_DATA (a)->prev_bucket_allocno = NULL;
if (head != NULL)
- ALLOCNO_PREV_BUCKET_ALLOCNO (head) = a;
+ ALLOCNO_COLOR_DATA (head)->prev_bucket_allocno = a;
head = a;
}
*bucket_ptr = head;
ira_allocno_t *bucket_ptr)
{
ira_allocno_t before, after;
- enum reg_class cover_class;
if (bucket_ptr == &uncolorable_allocno_bucket
- && (cover_class = ALLOCNO_COVER_CLASS (allocno)) != NO_REGS)
+ && ALLOCNO_CLASS (allocno) != NO_REGS)
{
- uncolorable_allocnos_num[cover_class]++;
- ira_assert (uncolorable_allocnos_num[cover_class] > 0);
+ uncolorable_allocnos_num++;
+ ira_assert (uncolorable_allocnos_num > 0);
}
for (before = *bucket_ptr, after = NULL;
before != NULL;
- after = before, before = ALLOCNO_NEXT_BUCKET_ALLOCNO (before))
+ after = before,
+ before = ALLOCNO_COLOR_DATA (before)->next_bucket_allocno)
if (bucket_allocno_compare_func (&allocno, &before) < 0)
break;
- ALLOCNO_NEXT_BUCKET_ALLOCNO (allocno) = before;
- ALLOCNO_PREV_BUCKET_ALLOCNO (allocno) = after;
+ ALLOCNO_COLOR_DATA (allocno)->next_bucket_allocno = before;
+ ALLOCNO_COLOR_DATA (allocno)->prev_bucket_allocno = after;
if (after == NULL)
*bucket_ptr = allocno;
else
- ALLOCNO_NEXT_BUCKET_ALLOCNO (after) = allocno;
+ ALLOCNO_COLOR_DATA (after)->next_bucket_allocno = allocno;
if (before != NULL)
- ALLOCNO_PREV_BUCKET_ALLOCNO (before) = allocno;
+ ALLOCNO_COLOR_DATA (before)->prev_bucket_allocno = allocno;
}
/* Delete ALLOCNO from bucket *BUCKET_PTR. It should be there before
delete_allocno_from_bucket (ira_allocno_t allocno, ira_allocno_t *bucket_ptr)
{
ira_allocno_t prev_allocno, next_allocno;
- enum reg_class cover_class;
if (bucket_ptr == &uncolorable_allocno_bucket
- && (cover_class = ALLOCNO_COVER_CLASS (allocno)) != NO_REGS)
+ && ALLOCNO_CLASS (allocno) != NO_REGS)
{
- uncolorable_allocnos_num[cover_class]--;
- ira_assert (uncolorable_allocnos_num[cover_class] >= 0);
+ uncolorable_allocnos_num--;
+ ira_assert (uncolorable_allocnos_num >= 0);
}
- prev_allocno = ALLOCNO_PREV_BUCKET_ALLOCNO (allocno);
- next_allocno = ALLOCNO_NEXT_BUCKET_ALLOCNO (allocno);
+ prev_allocno = ALLOCNO_COLOR_DATA (allocno)->prev_bucket_allocno;
+ next_allocno = ALLOCNO_COLOR_DATA (allocno)->next_bucket_allocno;
if (prev_allocno != NULL)
- ALLOCNO_NEXT_BUCKET_ALLOCNO (prev_allocno) = next_allocno;
+ ALLOCNO_COLOR_DATA (prev_allocno)->next_bucket_allocno = next_allocno;
else
{
ira_assert (*bucket_ptr == allocno);
*bucket_ptr = next_allocno;
}
if (next_allocno != NULL)
- ALLOCNO_PREV_BUCKET_ALLOCNO (next_allocno) = prev_allocno;
+ ALLOCNO_COLOR_DATA (next_allocno)->prev_bucket_allocno = prev_allocno;
}
-/* Splay tree for each cover class. The trees are indexed by the
- corresponding cover classes. Splay trees contain uncolorable
- allocnos. */
-static splay_tree uncolorable_allocnos_splay_tree[N_REG_CLASSES];
-
-/* If the following macro is TRUE, splay tree is used to choose an
- allocno of the corresponding cover class for spilling. When the
- number uncolorable allocnos of given cover class decreases to some
- threshold, linear array search is used to find the best allocno for
- spilling. This threshold is actually pretty big because, although
- splay trees asymptotically is much faster, each splay tree
- operation is sufficiently costly especially taking cache locality
- into account. */
-#define USE_SPLAY_P(CLASS) (uncolorable_allocnos_num[CLASS] > 4000)
-
/* Put allocno A onto the coloring stack without removing it from its
bucket. Pushing allocno to the coloring stack can result in moving
conflicting allocnos from the uncolorable bucket to the colorable
static void
push_allocno_to_stack (ira_allocno_t a)
{
- int size;
- enum reg_class cover_class;
- int i, n = ALLOCNO_NUM_OBJECTS (a);
-
- ALLOCNO_IN_GRAPH_P (a) = false;
+ enum reg_class aclass;
+ allocno_color_data_t data, conflict_data;
+ int size, i, n = ALLOCNO_NUM_OBJECTS (a);
+
+ data = ALLOCNO_COLOR_DATA (a);
+ data->in_graph_p = false;
VEC_safe_push (ira_allocno_t, heap, allocno_stack_vec, a);
- cover_class = ALLOCNO_COVER_CLASS (a);
- if (cover_class == NO_REGS)
+ aclass = ALLOCNO_CLASS (a);
+ if (aclass == NO_REGS)
return;
- size = ira_reg_class_nregs[cover_class][ALLOCNO_MODE (a)];
- if (ALLOCNO_NUM_OBJECTS (a) > 1)
+ size = ira_reg_class_max_nregs[aclass][ALLOCNO_MODE (a)];
+ if (n > 1)
{
/* We will deal with the subwords individually. */
gcc_assert (size == ALLOCNO_NUM_OBJECTS (a));
for (i = 0; i < n; i++)
{
ira_object_t obj = ALLOCNO_OBJECT (a, i);
- int conflict_size;
ira_object_t conflict_obj;
ira_object_conflict_iterator oci;
FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)
{
ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj);
- int left_conflicts_size;
- conflict_a = conflict_a;
- if (!bitmap_bit_p (coloring_allocno_bitmap,
- ALLOCNO_NUM (conflict_a)))
+ conflict_data = ALLOCNO_COLOR_DATA (conflict_a);
+ if (conflict_data->colorable_p
+ || ! conflict_data->in_graph_p
+ || ALLOCNO_ASSIGNED_P (conflict_a)
+ || !(hard_reg_set_intersect_p
+ (OBJECT_COLOR_DATA (obj)->profitable_hard_regs,
+ OBJECT_COLOR_DATA (conflict_obj)->profitable_hard_regs)))
continue;
-
- ira_assert (cover_class
- == ALLOCNO_COVER_CLASS (conflict_a));
- if (!ALLOCNO_IN_GRAPH_P (conflict_a)
- || ALLOCNO_ASSIGNED_P (conflict_a))
- continue;
-
- left_conflicts_size = ALLOCNO_LEFT_CONFLICTS_SIZE (conflict_a);
- conflict_size
- = (ira_reg_class_nregs
- [cover_class][ALLOCNO_MODE (conflict_a)]);
- ira_assert (left_conflicts_size >= size);
- if (left_conflicts_size + conflict_size
- <= ALLOCNO_AVAILABLE_REGS_NUM (conflict_a))
- {
- ALLOCNO_LEFT_CONFLICTS_SIZE (conflict_a) -= size;
- continue;
- }
- left_conflicts_size -= size;
- if (uncolorable_allocnos_splay_tree[cover_class] != NULL
- && !ALLOCNO_SPLAY_REMOVED_P (conflict_a)
- && USE_SPLAY_P (cover_class))
- {
- ira_assert
- (splay_tree_lookup
- (uncolorable_allocnos_splay_tree[cover_class],
- (splay_tree_key) conflict_a) != NULL);
- splay_tree_remove
- (uncolorable_allocnos_splay_tree[cover_class],
- (splay_tree_key) conflict_a);
- ALLOCNO_SPLAY_REMOVED_P (conflict_a) = true;
- VEC_safe_push (ira_allocno_t, heap,
- removed_splay_allocno_vec,
- conflict_a);
- }
- ALLOCNO_LEFT_CONFLICTS_SIZE (conflict_a)
- = left_conflicts_size;
- if (left_conflicts_size + conflict_size
- <= ALLOCNO_AVAILABLE_REGS_NUM (conflict_a))
+ ira_assert (bitmap_bit_p (coloring_allocno_bitmap,
+ ALLOCNO_NUM (conflict_a)));
+ if (update_left_conflict_sizes_p (conflict_a, obj, size))
{
delete_allocno_from_bucket
- (conflict_a, &uncolorable_allocno_bucket);
+ (conflict_a, &uncolorable_allocno_bucket);
add_allocno_to_ordered_bucket
(conflict_a, &colorable_allocno_bucket);
+ if (internal_flag_ira_verbose > 4 && ira_dump_file != NULL)
+ {
+ fprintf (ira_dump_file, " Making");
+ ira_print_expanded_allocno (conflict_a);
+ fprintf (ira_dump_file, " colorable\n");
+ }
}
+
}
}
}
static void
remove_allocno_from_bucket_and_push (ira_allocno_t allocno, bool colorable_p)
{
- enum reg_class cover_class;
-
if (colorable_p)
delete_allocno_from_bucket (allocno, &colorable_allocno_bucket);
else
fprintf (ira_dump_file, " Pushing");
ira_print_expanded_allocno (allocno);
if (colorable_p)
- fprintf (ira_dump_file, "\n");
+ fprintf (ira_dump_file, "(cost %d)\n",
+ ALLOCNO_COLOR_DATA (allocno)->temp);
else
fprintf (ira_dump_file, "(potential spill: %spri=%d, cost=%d)\n",
ALLOCNO_BAD_SPILL_P (allocno) ? "bad spill, " : "",
- allocno_spill_priority (allocno), ALLOCNO_TEMP (allocno));
- }
- cover_class = ALLOCNO_COVER_CLASS (allocno);
- ira_assert ((colorable_p
- && (ALLOCNO_LEFT_CONFLICTS_SIZE (allocno)
- + ira_reg_class_nregs[cover_class][ALLOCNO_MODE (allocno)]
- <= ALLOCNO_AVAILABLE_REGS_NUM (allocno)))
- || (! colorable_p
- && (ALLOCNO_LEFT_CONFLICTS_SIZE (allocno)
- + ira_reg_class_nregs[cover_class][ALLOCNO_MODE
- (allocno)]
- > ALLOCNO_AVAILABLE_REGS_NUM (allocno))));
+ allocno_spill_priority (allocno),
+ ALLOCNO_COLOR_DATA (allocno)->temp);
+ }
if (! colorable_p)
- ALLOCNO_MAY_BE_SPILLED_P (allocno) = true;
+ ALLOCNO_COLOR_DATA (allocno)->may_be_spilled_p = true;
push_allocno_to_stack (allocno);
}
static void
push_only_colorable (void)
{
- sort_bucket (&colorable_allocno_bucket);
+ sort_bucket (&colorable_allocno_bucket, bucket_allocno_compare_func);
for (;colorable_allocno_bucket != NULL;)
remove_allocno_from_bucket_and_push (colorable_allocno_bucket, true);
}
-/* Puts ALLOCNO chosen for potential spilling onto the coloring
- stack. */
-static void
-push_allocno_to_spill (ira_allocno_t allocno)
-{
- delete_allocno_from_bucket (allocno, &uncolorable_allocno_bucket);
- ALLOCNO_MAY_BE_SPILLED_P (allocno) = true;
- if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
- fprintf (ira_dump_file, " Pushing p%d(%d) (spill for NO_REGS)\n",
- ALLOCNO_NUM (allocno), ALLOCNO_REGNO (allocno));
- push_allocno_to_stack (allocno);
-}
-
/* Return the frequency of exit edges (if EXIT_P) or entry from/to the
loop given by its LOOP_NODE. */
int
ira_loop_tree_node_t parent_node, loop_node;
regno = ALLOCNO_REGNO (a);
- cost = ALLOCNO_UPDATED_MEMORY_COST (a) - ALLOCNO_UPDATED_COVER_CLASS_COST (a);
+ cost = ALLOCNO_UPDATED_MEMORY_COST (a) - ALLOCNO_UPDATED_CLASS_COST (a);
if (ALLOCNO_CAP (a) != NULL)
return cost;
loop_node = ALLOCNO_LOOP_TREE_NODE (a);
if ((parent_allocno = parent_node->regno_allocno_map[regno]) == NULL)
return cost;
mode = ALLOCNO_MODE (a);
- rclass = ALLOCNO_COVER_CLASS (a);
+ rclass = ALLOCNO_CLASS (a);
if (ALLOCNO_HARD_REGNO (parent_allocno) < 0)
cost -= (ira_memory_move_cost[mode][rclass][0]
* ira_loop_edge_freq (loop_node, regno, true)
+ ira_memory_move_cost[mode][rclass][1]
* ira_loop_edge_freq (loop_node, regno, false));
else
- cost += ((ira_memory_move_cost[mode][rclass][1]
- * ira_loop_edge_freq (loop_node, regno, true)
- + ira_memory_move_cost[mode][rclass][0]
- * ira_loop_edge_freq (loop_node, regno, false))
- - (ira_get_register_move_cost (mode, rclass, rclass)
- * (ira_loop_edge_freq (loop_node, regno, false)
- + ira_loop_edge_freq (loop_node, regno, true))));
+ {
+ ira_init_register_move_cost_if_necessary (mode);
+ cost += ((ira_memory_move_cost[mode][rclass][1]
+ * ira_loop_edge_freq (loop_node, regno, true)
+ + ira_memory_move_cost[mode][rclass][0]
+ * ira_loop_edge_freq (loop_node, regno, false))
+ - (ira_register_move_cost[mode][rclass][rclass]
+ * (ira_loop_edge_freq (loop_node, regno, false)
+ + ira_loop_edge_freq (loop_node, regno, true))));
+ }
return cost;
}
-/* Compare keys in the splay tree used to choose best allocno for
- spilling. The best allocno has the minimal key. */
-static int
-allocno_spill_priority_compare (splay_tree_key k1, splay_tree_key k2)
+/* Used for sorting allocnos for spilling. */
+static inline int
+allocno_spill_priority_compare (ira_allocno_t a1, ira_allocno_t a2)
{
int pri1, pri2, diff;
- ira_allocno_t a1 = (ira_allocno_t) k1, a2 = (ira_allocno_t) k2;
- pri1 = (ALLOCNO_TEMP (a1)
- / (ALLOCNO_LEFT_CONFLICTS_SIZE (a1)
- * ira_reg_class_nregs[ALLOCNO_COVER_CLASS (a1)][ALLOCNO_MODE (a1)]
- + 1));
- pri2 = (ALLOCNO_TEMP (a2)
- / (ALLOCNO_LEFT_CONFLICTS_SIZE (a2)
- * ira_reg_class_nregs[ALLOCNO_COVER_CLASS (a2)][ALLOCNO_MODE (a2)]
- + 1));
+ if (ALLOCNO_BAD_SPILL_P (a1) && ! ALLOCNO_BAD_SPILL_P (a2))
+ return 1;
+ if (ALLOCNO_BAD_SPILL_P (a2) && ! ALLOCNO_BAD_SPILL_P (a1))
+ return -1;
+ pri1 = allocno_spill_priority (a1);
+ pri2 = allocno_spill_priority (a2);
if ((diff = pri1 - pri2) != 0)
return diff;
- if ((diff = ALLOCNO_TEMP (a1) - ALLOCNO_TEMP (a2)) != 0)
+ if ((diff
+ = ALLOCNO_COLOR_DATA (a1)->temp - ALLOCNO_COLOR_DATA (a2)->temp) != 0)
return diff;
return ALLOCNO_NUM (a1) - ALLOCNO_NUM (a2);
}
-/* Allocate data of SIZE for the splay trees. We allocate only spay
- tree roots or splay tree nodes. If you change this, please rewrite
- the function. */
-static void *
-splay_tree_allocate (int size, void *data ATTRIBUTE_UNUSED)
-{
- if (size != sizeof (struct splay_tree_node_s))
- return ira_allocate (size);
- return pool_alloc (splay_tree_node_pool);
-}
-
-/* Free data NODE for the splay trees. We allocate and free only spay
- tree roots or splay tree nodes. If you change this, please rewrite
- the function. */
-static void
-splay_tree_free (void *node, void *data ATTRIBUTE_UNUSED)
+/* Used for sorting allocnos for spilling. */
+static int
+allocno_spill_sort_compare (const void *v1p, const void *v2p)
{
- int i;
- enum reg_class cover_class;
+ ira_allocno_t p1 = *(const ira_allocno_t *) v1p;
+ ira_allocno_t p2 = *(const ira_allocno_t *) v2p;
- for (i = 0; i < ira_reg_class_cover_size; i++)
- {
- cover_class = ira_reg_class_cover[i];
- if (node == uncolorable_allocnos_splay_tree[cover_class])
- {
- ira_free (node);
- return;
- }
- }
- pool_free (splay_tree_node_pool, node);
+ return allocno_spill_priority_compare (p1, p2);
}
/* Push allocnos to the coloring stack. The order of allocnos in the
- stack defines the order for the subsequent coloring. */
-static void
-push_allocnos_to_stack (void)
-{
- ira_allocno_t allocno, i_allocno, *allocno_vec;
- enum reg_class cover_class, rclass;
- int allocno_pri, i_allocno_pri, allocno_cost, i_allocno_cost;
- int i, j, num, cover_class_allocnos_num[N_REG_CLASSES];
- ira_allocno_t *cover_class_allocnos[N_REG_CLASSES];
- int cost;
-
- /* Initialize. */
- VEC_truncate(ira_allocno_t, removed_splay_allocno_vec, 0);
- for (i = 0; i < ira_reg_class_cover_size; i++)
- {
- cover_class = ira_reg_class_cover[i];
- cover_class_allocnos_num[cover_class] = 0;
- cover_class_allocnos[cover_class] = NULL;
- uncolorable_allocnos_splay_tree[cover_class] = NULL;
- }
- /* Calculate uncolorable allocno spill costs. */
- for (allocno = uncolorable_allocno_bucket;
- allocno != NULL;
- allocno = ALLOCNO_NEXT_BUCKET_ALLOCNO (allocno))
- if ((cover_class = ALLOCNO_COVER_CLASS (allocno)) != NO_REGS)
- {
- cover_class_allocnos_num[cover_class]++;
- cost = calculate_allocno_spill_cost (allocno);
- ALLOCNO_TEMP (allocno) = cost;
- }
- /* Define place where to put uncolorable allocnos of the same cover
- class. */
- for (num = i = 0; i < ira_reg_class_cover_size; i++)
- {
- cover_class = ira_reg_class_cover[i];
- ira_assert (cover_class_allocnos_num[cover_class]
- == uncolorable_allocnos_num[cover_class]);
- if (cover_class_allocnos_num[cover_class] != 0)
- {
- cover_class_allocnos[cover_class] = allocnos_for_spilling + num;
- num += cover_class_allocnos_num[cover_class];
- cover_class_allocnos_num[cover_class] = 0;
- }
- if (USE_SPLAY_P (cover_class))
- uncolorable_allocnos_splay_tree[cover_class]
- = splay_tree_new_with_allocator (allocno_spill_priority_compare,
- NULL, NULL, splay_tree_allocate,
- splay_tree_free, NULL);
- }
- ira_assert (num <= ira_allocnos_num);
- /* Collect uncolorable allocnos of each cover class. */
- for (allocno = uncolorable_allocno_bucket;
- allocno != NULL;
- allocno = ALLOCNO_NEXT_BUCKET_ALLOCNO (allocno))
- if ((cover_class = ALLOCNO_COVER_CLASS (allocno)) != NO_REGS)
- {
- cover_class_allocnos
- [cover_class][cover_class_allocnos_num[cover_class]++] = allocno;
- if (uncolorable_allocnos_splay_tree[cover_class] != NULL)
- splay_tree_insert (uncolorable_allocnos_splay_tree[cover_class],
- (splay_tree_key) allocno,
- (splay_tree_value) allocno);
- }
- for (;;)
- {
- push_only_colorable ();
- allocno = uncolorable_allocno_bucket;
- if (allocno == NULL)
- break;
- cover_class = ALLOCNO_COVER_CLASS (allocno);
- if (cover_class == NO_REGS)
- {
- push_allocno_to_spill (allocno);
- continue;
- }
- /* Potential spilling. */
- ira_assert
- (ira_reg_class_nregs[cover_class][ALLOCNO_MODE (allocno)] > 0);
- if (USE_SPLAY_P (cover_class))
- {
- for (;VEC_length (ira_allocno_t, removed_splay_allocno_vec) != 0;)
- {
- allocno = VEC_pop (ira_allocno_t, removed_splay_allocno_vec);
- ALLOCNO_SPLAY_REMOVED_P (allocno) = false;
- rclass = ALLOCNO_COVER_CLASS (allocno);
- if (ALLOCNO_LEFT_CONFLICTS_SIZE (allocno)
- + ira_reg_class_nregs [rclass][ALLOCNO_MODE (allocno)]
- > ALLOCNO_AVAILABLE_REGS_NUM (allocno))
- splay_tree_insert
- (uncolorable_allocnos_splay_tree[rclass],
- (splay_tree_key) allocno, (splay_tree_value) allocno);
- }
- allocno = ((ira_allocno_t)
- splay_tree_min
- (uncolorable_allocnos_splay_tree[cover_class])->key);
- splay_tree_remove (uncolorable_allocnos_splay_tree[cover_class],
- (splay_tree_key) allocno);
- }
- else
- {
- num = cover_class_allocnos_num[cover_class];
- ira_assert (num > 0);
- allocno_vec = cover_class_allocnos[cover_class];
- allocno = NULL;
- allocno_pri = allocno_cost = 0;
- /* Sort uncolorable allocno to find the one with the lowest
- spill cost. */
- for (i = 0, j = num - 1; i <= j;)
- {
- i_allocno = allocno_vec[i];
- if (! ALLOCNO_IN_GRAPH_P (i_allocno)
- && ALLOCNO_IN_GRAPH_P (allocno_vec[j]))
- {
- i_allocno = allocno_vec[j];
- allocno_vec[j] = allocno_vec[i];
- allocno_vec[i] = i_allocno;
- }
- if (ALLOCNO_IN_GRAPH_P (i_allocno))
- {
- i++;
- ira_assert (ALLOCNO_TEMP (i_allocno) != INT_MAX);
- i_allocno_cost = ALLOCNO_TEMP (i_allocno);
- i_allocno_pri = allocno_spill_priority (i_allocno);
- if (allocno == NULL
- || (! ALLOCNO_BAD_SPILL_P (i_allocno)
- && ALLOCNO_BAD_SPILL_P (allocno))
- || (! (ALLOCNO_BAD_SPILL_P (i_allocno)
- && ! ALLOCNO_BAD_SPILL_P (allocno))
- && (allocno_pri > i_allocno_pri
- || (allocno_pri == i_allocno_pri
- && (allocno_cost > i_allocno_cost
- || (allocno_cost == i_allocno_cost
- && (ALLOCNO_NUM (allocno)
- > ALLOCNO_NUM (i_allocno))))))))
- {
- allocno = i_allocno;
- allocno_cost = i_allocno_cost;
- allocno_pri = i_allocno_pri;
- }
- }
- if (! ALLOCNO_IN_GRAPH_P (allocno_vec[j]))
- j--;
- }
- ira_assert (allocno != NULL && j >= 0);
- cover_class_allocnos_num[cover_class] = j + 1;
- }
- ira_assert (ALLOCNO_IN_GRAPH_P (allocno)
- && ALLOCNO_COVER_CLASS (allocno) == cover_class
- && (ALLOCNO_LEFT_CONFLICTS_SIZE (allocno)
- + ira_reg_class_nregs[cover_class][ALLOCNO_MODE
- (allocno)]
- > ALLOCNO_AVAILABLE_REGS_NUM (allocno)));
- remove_allocno_from_bucket_and_push (allocno, false);
+ stack defines the order for the subsequent coloring. */
+static void
+push_allocnos_to_stack (void)
+{
+ ira_allocno_t a;
+ int cost;
+
+ /* Calculate uncolorable allocno spill costs. */
+ for (a = uncolorable_allocno_bucket;
+ a != NULL;
+ a = ALLOCNO_COLOR_DATA (a)->next_bucket_allocno)
+ if (ALLOCNO_CLASS (a) != NO_REGS)
+ {
+ cost = calculate_allocno_spill_cost (a);
+ /* ??? Remove cost of copies between the coalesced
+ allocnos. */
+ ALLOCNO_COLOR_DATA (a)->temp = cost;
+ }
+ sort_bucket (&uncolorable_allocno_bucket, allocno_spill_sort_compare);
+ for (;;)
+ {
+ push_only_colorable ();
+ a = uncolorable_allocno_bucket;
+ if (a == NULL)
+ break;
+ remove_allocno_from_bucket_and_push (a, false);
}
ira_assert (colorable_allocno_bucket == NULL
&& uncolorable_allocno_bucket == NULL);
- for (i = 0; i < ira_reg_class_cover_size; i++)
- {
- cover_class = ira_reg_class_cover[i];
- ira_assert (uncolorable_allocnos_num[cover_class] == 0);
- if (uncolorable_allocnos_splay_tree[cover_class] != NULL)
- splay_tree_delete (uncolorable_allocnos_splay_tree[cover_class]);
- }
+ ira_assert (uncolorable_allocnos_num == 0);
}
/* Pop the coloring stack and assign hard registers to the popped
pop_allocnos_from_stack (void)
{
ira_allocno_t allocno;
- enum reg_class cover_class;
+ enum reg_class aclass;
for (;VEC_length (ira_allocno_t, allocno_stack_vec) != 0;)
{
allocno = VEC_pop (ira_allocno_t, allocno_stack_vec);
- cover_class = ALLOCNO_COVER_CLASS (allocno);
+ aclass = ALLOCNO_CLASS (allocno);
if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
{
fprintf (ira_dump_file, " Popping");
ira_print_expanded_allocno (allocno);
fprintf (ira_dump_file, " -- ");
}
- if (cover_class == NO_REGS)
+ if (aclass == NO_REGS)
{
ALLOCNO_HARD_REGNO (allocno) = -1;
ALLOCNO_ASSIGNED_P (allocno) = true;
if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
fprintf (ira_dump_file, "spill\n");
}
- ALLOCNO_IN_GRAPH_P (allocno) = true;
- }
-}
-
-/* Loop over all subobjects of allocno A, collecting total hard
- register conflicts in PSET (which the caller must initialize). */
-static void
-all_conflicting_hard_regs (ira_allocno_t a, HARD_REG_SET *pset)
-{
- int i;
- int n = ALLOCNO_NUM_OBJECTS (a);
-
- for (i = 0; i < n; i++)
- {
- ira_object_t obj = ALLOCNO_OBJECT (a, i);
-
- IOR_HARD_REG_SET (*pset, OBJECT_TOTAL_CONFLICT_HARD_REGS (obj));
+ ALLOCNO_COLOR_DATA (allocno)->in_graph_p = true;
}
}
static void
setup_allocno_available_regs_num (ira_allocno_t a)
{
- int i, n, hard_regs_num, hard_regno;
+ int i, j, n, hard_regno, hard_regs_num, nwords, nregs;
+ enum reg_class aclass;
enum machine_mode mode;
- enum reg_class cover_class;
- HARD_REG_SET temp_set;
+ allocno_color_data_t data;
- cover_class = ALLOCNO_COVER_CLASS (a);
- ALLOCNO_AVAILABLE_REGS_NUM (a) = ira_available_class_regs[cover_class];
- if (cover_class == NO_REGS)
+ aclass = ALLOCNO_CLASS (a);
+ data = ALLOCNO_COLOR_DATA (a);
+ data->available_regs_num = 0;
+ if (aclass == NO_REGS)
return;
- CLEAR_HARD_REG_SET (temp_set);
- ira_assert (ALLOCNO_FIRST_COALESCED_ALLOCNO (a) == a);
- hard_regs_num = ira_class_hard_regs_num[cover_class];
- all_conflicting_hard_regs (a, &temp_set);
-
+ hard_regs_num = ira_class_hard_regs_num[aclass];
mode = ALLOCNO_MODE (a);
+ nwords = ALLOCNO_NUM_OBJECTS (a);
for (n = 0, i = hard_regs_num - 1; i >= 0; i--)
{
- hard_regno = ira_class_hard_regs[cover_class][i];
- if (TEST_HARD_REG_BIT (temp_set, hard_regno)
- || TEST_HARD_REG_BIT (prohibited_class_mode_regs[cover_class][mode],
- hard_regno))
+ hard_regno = ira_class_hard_regs[aclass][i];
+ nregs = hard_regno_nregs[hard_regno][mode];
+ for (j = 0; j < nregs; j++)
+ {
+ int k;
+ int set_to_test_start = 0, set_to_test_end = nwords;
+
+ if (nregs == nwords)
+ {
+ if (WORDS_BIG_ENDIAN)
+ set_to_test_start = nwords - j - 1;
+ else
+ set_to_test_start = j;
+ set_to_test_end = set_to_test_start + 1;
+ }
+ for (k = set_to_test_start; k < set_to_test_end; k++)
+ {
+ ira_object_t obj = ALLOCNO_OBJECT (a, k);
+ object_color_data_t obj_data = OBJECT_COLOR_DATA (obj);
+
+ /* Checking only profitable hard regs which exclude
+ object's conflict hard regs. */
+ if (TEST_HARD_REG_BIT (OBJECT_TOTAL_CONFLICT_HARD_REGS (obj),
+ hard_regno + j)
+ || ! TEST_HARD_REG_BIT (obj_data->profitable_hard_regs,
+ hard_regno + j))
+ break;
+ }
+ if (k != set_to_test_end)
+ break;
+ }
+ if (j == nregs)
n++;
}
- if (internal_flag_ira_verbose > 2 && n > 0 && ira_dump_file != NULL)
- fprintf (ira_dump_file, " Reg %d of %s has %d regs less\n",
- ALLOCNO_REGNO (a), reg_class_names[cover_class], n);
- ALLOCNO_AVAILABLE_REGS_NUM (a) -= n;
-}
-
-/* Set up ALLOCNO_LEFT_CONFLICTS_SIZE for allocno A. */
-static void
-setup_allocno_left_conflicts_size (ira_allocno_t a)
-{
- int i, hard_regs_num, hard_regno, conflict_allocnos_size;
- enum reg_class cover_class;
- HARD_REG_SET temp_set;
-
- cover_class = ALLOCNO_COVER_CLASS (a);
- hard_regs_num = ira_class_hard_regs_num[cover_class];
- CLEAR_HARD_REG_SET (temp_set);
- ira_assert (ALLOCNO_FIRST_COALESCED_ALLOCNO (a) == a);
- all_conflicting_hard_regs (a, &temp_set);
-
- AND_HARD_REG_SET (temp_set, reg_class_contents[cover_class]);
- AND_COMPL_HARD_REG_SET (temp_set, ira_no_alloc_regs);
-
- conflict_allocnos_size = 0;
- if (! hard_reg_set_empty_p (temp_set))
- for (i = 0; i < (int) hard_regs_num; i++)
- {
- hard_regno = ira_class_hard_regs[cover_class][i];
- if (TEST_HARD_REG_BIT (temp_set, hard_regno))
- {
- conflict_allocnos_size++;
- CLEAR_HARD_REG_BIT (temp_set, hard_regno);
- if (hard_reg_set_empty_p (temp_set))
- break;
- }
- }
- CLEAR_HARD_REG_SET (temp_set);
- if (cover_class != NO_REGS)
+ data->available_regs_num = n;
+ if (internal_flag_ira_verbose <= 2 || ira_dump_file == NULL)
+ return;
+ fprintf
+ (ira_dump_file,
+ " Allocno a%dr%d of %s(%d) has %d avail. regs",
+ ALLOCNO_NUM (a), ALLOCNO_REGNO (a),
+ reg_class_names[aclass], ira_class_hard_regs_num[aclass], n);
+ for (i = 0; i < nwords; i++)
{
- int n = ALLOCNO_NUM_OBJECTS (a);
+ ira_object_t obj = ALLOCNO_OBJECT (a, i);
+ object_color_data_t obj_data = OBJECT_COLOR_DATA (obj);
- for (i = 0; i < n; i++)
+ if (nwords != 1)
{
- ira_object_t obj = ALLOCNO_OBJECT (a, i);
- ira_object_t conflict_obj;
- ira_object_conflict_iterator oci;
-
- FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)
- {
- ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj);
-
- ira_assert (cover_class
- == ALLOCNO_COVER_CLASS (conflict_a));
- if (! ALLOCNO_ASSIGNED_P (conflict_a))
- conflict_allocnos_size
- += (ira_reg_class_nregs
- [cover_class][ALLOCNO_MODE (conflict_a)]);
- else if ((hard_regno = ALLOCNO_HARD_REGNO (conflict_a))
- >= 0)
- {
- int last = (hard_regno
- + hard_regno_nregs
- [hard_regno][ALLOCNO_MODE (conflict_a)]);
-
- while (hard_regno < last)
- {
- if (! TEST_HARD_REG_BIT (temp_set, hard_regno))
- {
- conflict_allocnos_size++;
- SET_HARD_REG_BIT (temp_set, hard_regno);
- }
- hard_regno++;
- }
- }
- }
+ if (i != 0)
+ fprintf (ira_dump_file, ", ");
+ fprintf (ira_dump_file, " obj %d", i);
}
+ print_hard_reg_set (ira_dump_file, obj_data->profitable_hard_regs, false);
+ fprintf (ira_dump_file, " (confl regs = ");
+ print_hard_reg_set (ira_dump_file, OBJECT_TOTAL_CONFLICT_HARD_REGS (obj),
+ false);
+ fprintf (ira_dump_file, " ) %snode: ",
+ hard_reg_set_equal_p (obj_data->profitable_hard_regs,
+ obj_data->hard_regs_node->hard_regs->set)
+ ? "" : "^");
+ print_hard_reg_set (ira_dump_file,
+ obj_data->hard_regs_node->hard_regs->set, false);
+
}
- ALLOCNO_LEFT_CONFLICTS_SIZE (a) = conflict_allocnos_size;
+ fprintf (ira_dump_file, "\n");
}
/* Put ALLOCNO in a bucket corresponding to its number and size of its
static void
put_allocno_into_bucket (ira_allocno_t allocno)
{
- enum reg_class cover_class;
-
- cover_class = ALLOCNO_COVER_CLASS (allocno);
- ALLOCNO_IN_GRAPH_P (allocno) = true;
- setup_allocno_left_conflicts_size (allocno);
+ ALLOCNO_COLOR_DATA (allocno)->in_graph_p = true;
setup_allocno_available_regs_num (allocno);
- if (ALLOCNO_LEFT_CONFLICTS_SIZE (allocno)
- + ira_reg_class_nregs[cover_class][ALLOCNO_MODE (allocno)]
- <= ALLOCNO_AVAILABLE_REGS_NUM (allocno))
+ if (setup_left_conflict_sizes_p (allocno))
add_allocno_to_bucket (allocno, &colorable_allocno_bucket);
else
add_allocno_to_bucket (allocno, &uncolorable_allocno_bucket);
allocno_priorities[ALLOCNO_NUM (a)]
= priority
= (mult
- * (ALLOCNO_MEMORY_COST (a) - ALLOCNO_COVER_CLASS_COST (a))
- * ira_reg_class_nregs[ALLOCNO_COVER_CLASS (a)][ALLOCNO_MODE (a)]);
+ * (ALLOCNO_MEMORY_COST (a) - ALLOCNO_CLASS_COST (a))
+ * ira_reg_class_max_nregs[ALLOCNO_CLASS (a)][ALLOCNO_MODE (a)]);
if (priority < 0)
priority = -priority;
if (max_priority < priority)
}
}
+/* Sort allocnos according to the profit of usage of a hard register
+ instead of memory for them. */
+static int
+allocno_cost_compare_func (const void *v1p, const void *v2p)
+{
+ ira_allocno_t p1 = *(const ira_allocno_t *) v1p;
+ ira_allocno_t p2 = *(const ira_allocno_t *) v2p;
+ int c1, c2;
+
+ c1 = ALLOCNO_UPDATED_MEMORY_COST (p1) - ALLOCNO_UPDATED_CLASS_COST (p1);
+ c2 = ALLOCNO_UPDATED_MEMORY_COST (p2) - ALLOCNO_UPDATED_CLASS_COST (p2);
+ if (c1 - c2)
+ return c1 - c2;
+
+ /* If regs are equally good, sort by allocno numbers, so that the
+ results of qsort leave nothing to chance. */
+ return ALLOCNO_NUM (p1) - ALLOCNO_NUM (p2);
+}
+
+/* We used Chaitin-Briggs coloring to assign as many pseudos as
+ possible to hard registers. Let us try to improve allocation with
+ cost point of view. This function improves the allocation by
+ spilling some allocnos and assigning the freed hard registers to
+ other allocnos if it decreases the overall allocation cost. */
+static void
+improve_allocation (void)
+{
+ unsigned int i;
+ int j, k, n, hregno, conflict_hregno, base_cost, class_size, word, nwords;
+ int check, spill_cost, min_cost, nregs, conflict_nregs, r, best;
+ bool try_p;
+ enum reg_class aclass;
+ enum machine_mode mode;
+ int *allocno_costs;
+ int costs[FIRST_PSEUDO_REGISTER];
+ HARD_REG_SET conflicting_regs[2], profitable_hard_regs[2];
+ ira_allocno_t a;
+ bitmap_iterator bi;
+
+ /* Clear counts used to process conflicting allocnos only once for
+ each allocno. */
+ EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)
+ ALLOCNO_COLOR_DATA (ira_allocnos[i])->temp = 0;
+ check = n = 0;
+ /* Process each allocno and try to assign a hard register to it by
+ spilling some its conflicting allocnos. */
+ EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)
+ {
+ a = ira_allocnos[i];
+ ALLOCNO_COLOR_DATA (a)->temp = 0;
+ if (empty_profitable_hard_regs (a))
+ continue;
+ check++;
+ aclass = ALLOCNO_CLASS (a);
+ allocno_costs = ALLOCNO_UPDATED_HARD_REG_COSTS (a);
+ if (allocno_costs == NULL)
+ allocno_costs = ALLOCNO_HARD_REG_COSTS (a);
+ if ((hregno = ALLOCNO_HARD_REGNO (a)) < 0)
+ base_cost = ALLOCNO_UPDATED_MEMORY_COST (a);
+ else if (allocno_costs == NULL)
+ /* It means that assigning a hard register is not profitable
+ (we don't waste memory for hard register costs in this
+ case). */
+ continue;
+ else
+ base_cost = allocno_costs[ira_class_hard_reg_index[aclass][hregno]];
+ try_p = false;
+ get_conflict_profitable_regs (a, false,
+ conflicting_regs, profitable_hard_regs);
+ class_size = ira_class_hard_regs_num[aclass];
+ /* Set up cost improvement for usage of each profitable hard
+ register for allocno A. */
+ for (j = 0; j < class_size; j++)
+ {
+ hregno = ira_class_hard_regs[aclass][j];
+ if (! check_hard_reg_p (a, hregno,
+ conflicting_regs, profitable_hard_regs))
+ continue;
+ ira_assert (ira_class_hard_reg_index[aclass][hregno] == j);
+ k = allocno_costs == NULL ? 0 : j;
+ costs[hregno] = (allocno_costs == NULL
+ ? ALLOCNO_UPDATED_CLASS_COST (a) : allocno_costs[k]);
+ costs[hregno] -= base_cost;
+ if (costs[hregno] < 0)
+ try_p = true;
+ }
+ if (! try_p)
+ /* There is no chance to improve the allocation cost by
+ assigning hard register to allocno A even without spilling
+ conflicting allocnos. */
+ continue;
+ mode = ALLOCNO_MODE (a);
+ nwords = ALLOCNO_NUM_OBJECTS (a);
+ /* Process each allocno conflicting with A and update the cost
+ improvement for profitable hard registers of A. To use a
+ hard register for A we need to spill some conflicting
+ allocnos and that creates penalty for the cost
+ improvement. */
+ for (word = 0; word < nwords; word++)
+ {
+ ira_object_t conflict_obj;
+ ira_object_t obj = ALLOCNO_OBJECT (a, word);
+ ira_object_conflict_iterator oci;
+
+ FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)
+ {
+ ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj);
+
+ if (ALLOCNO_COLOR_DATA (conflict_a)->temp == check)
+ /* We already processed this conflicting allocno
+ because we processed earlier another object of the
+ conflicting allocno. */
+ continue;
+ ALLOCNO_COLOR_DATA (conflict_a)->temp = check;
+ if ((conflict_hregno = ALLOCNO_HARD_REGNO (conflict_a)) < 0)
+ continue;
+ spill_cost = ALLOCNO_UPDATED_MEMORY_COST (conflict_a);
+ k = (ira_class_hard_reg_index
+ [ALLOCNO_CLASS (conflict_a)][conflict_hregno]);
+ ira_assert (k >= 0);
+ if ((allocno_costs = ALLOCNO_UPDATED_HARD_REG_COSTS (conflict_a))
+ != NULL)
+ spill_cost -= allocno_costs[k];
+ else if ((allocno_costs = ALLOCNO_HARD_REG_COSTS (conflict_a))
+ != NULL)
+ spill_cost -= allocno_costs[k];
+ else
+ spill_cost -= ALLOCNO_UPDATED_CLASS_COST (conflict_a);
+ conflict_nregs
+ = hard_regno_nregs[conflict_hregno][ALLOCNO_MODE (conflict_a)];
+ for (r = conflict_hregno;
+ r >= 0 && r + hard_regno_nregs[r][mode] > conflict_hregno;
+ r--)
+ if (check_hard_reg_p (a, r,
+ conflicting_regs, profitable_hard_regs))
+ costs[r] += spill_cost;
+ for (r = conflict_hregno + 1;
+ r < conflict_hregno + conflict_nregs;
+ r++)
+ if (check_hard_reg_p (a, r,
+ conflicting_regs, profitable_hard_regs))
+ costs[r] += spill_cost;
+ }
+ }
+ min_cost = INT_MAX;
+ best = -1;
+ /* Now we choose hard register for A which results in highest
+ allocation cost improvement. */
+ for (j = 0; j < class_size; j++)
+ {
+ hregno = ira_class_hard_regs[aclass][j];
+ if (check_hard_reg_p (a, hregno,
+ conflicting_regs, profitable_hard_regs)
+ && min_cost > costs[hregno])
+ {
+ best = hregno;
+ min_cost = costs[hregno];
+ }
+ }
+ if (min_cost >= 0)
+ /* We are in a situation when assigning any hard register to A
+ by spilling some conflicting allocnos does not improve the
+ allocation cost. */
+ continue;
+ nregs = hard_regno_nregs[best][mode];
+ /* Now spill conflicting allocnos which contain a hard register
+ of A when we assign the best chosen hard register to it. */
+ for (word = 0; word < nwords; word++)
+ {
+ ira_object_t conflict_obj;
+ ira_object_t obj = ALLOCNO_OBJECT (a, word);
+ ira_object_conflict_iterator oci;
+
+ FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)
+ {
+ ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj);
+
+ if ((conflict_hregno = ALLOCNO_HARD_REGNO (conflict_a)) < 0)
+ continue;
+ conflict_nregs
+ = hard_regno_nregs[conflict_hregno][ALLOCNO_MODE (conflict_a)];
+ if (best + nregs <= conflict_hregno
+ || conflict_hregno + conflict_nregs <= best)
+ /* No intersection. */
+ continue;
+ ALLOCNO_HARD_REGNO (conflict_a) = -1;
+ sorted_allocnos[n++] = conflict_a;
+ if (internal_flag_ira_verbose > 2 && ira_dump_file != NULL)
+ fprintf (ira_dump_file, "Spilling a%dr%d for a%dr%d\n",
+ ALLOCNO_NUM (conflict_a), ALLOCNO_REGNO (conflict_a),
+ ALLOCNO_NUM (a), ALLOCNO_REGNO (a));
+ }
+ }
+ /* Assign the best chosen hard register to A. */
+ ALLOCNO_HARD_REGNO (a) = best;
+ if (internal_flag_ira_verbose > 2 && ira_dump_file != NULL)
+ fprintf (ira_dump_file, "Assigning %d to a%dr%d\n",
+ best, ALLOCNO_NUM (a), ALLOCNO_REGNO (a));
+ }
+ if (n == 0)
+ return;
+ /* We spilled some allocnos to assign their hard registers to other
+ allocnos. The spilled allocnos are now in array
+ 'sorted_allocnos'. There is still a possibility that some of the
+ spilled allocnos can get hard registers. So let us try assign
+ them hard registers again (just a reminder -- function
+ 'assign_hard_reg' assigns hard registers only if it is possible
+ and profitable). We process the spilled allocnos with biggest
+ benefit to get hard register first -- see function
+ 'allocno_cost_compare_func'. */
+ qsort (sorted_allocnos, n, sizeof (ira_allocno_t),
+ allocno_cost_compare_func);
+ for (j = 0; j < n; j++)
+ {
+ a = sorted_allocnos[j];
+ ALLOCNO_ASSIGNED_P (a) = false;
+ if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
+ {
+ fprintf (ira_dump_file, " ");
+ ira_print_expanded_allocno (a);
+ fprintf (ira_dump_file, " -- ");
+ }
+ if (assign_hard_reg (a, false))
+ {
+ if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
+ fprintf (ira_dump_file, "assign hard reg %d\n",
+ ALLOCNO_HARD_REGNO (a));
+ }
+ else
+ {
+ if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
+ fprintf (ira_dump_file, "assign memory\n");
+ }
+ }
+}
+
/* Sort allocnos according to their priorities which are calculated
analogous to ones in file `global.c'. */
static int
bitmap_iterator bi;
ira_allocno_t a;
+ setup_profitable_hard_regs ();
if (flag_ira_algorithm == IRA_ALGORITHM_PRIORITY)
{
n = 0;
EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)
{
a = ira_allocnos[i];
- if (ALLOCNO_COVER_CLASS (a) == NO_REGS)
+ if (ALLOCNO_CLASS (a) == NO_REGS)
{
ALLOCNO_HARD_REGNO (a) = -1;
ALLOCNO_ASSIGNED_P (a) = true;
}
else
{
- /* Put the allocnos into the corresponding buckets. */
- colorable_allocno_bucket = NULL;
- uncolorable_allocno_bucket = NULL;
+ form_object_hard_regs_nodes_forest ();
+ if (internal_flag_ira_verbose > 2 && ira_dump_file != NULL)
+ print_hard_regs_forest (ira_dump_file);
EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)
{
a = ira_allocnos[i];
- if (ALLOCNO_COVER_CLASS (a) == NO_REGS)
+ if (ALLOCNO_CLASS (a) != NO_REGS && ! empty_profitable_hard_regs (a))
+ ALLOCNO_COLOR_DATA (a)->in_graph_p = true;
+ else
{
ALLOCNO_HARD_REGNO (a) = -1;
ALLOCNO_ASSIGNED_P (a) = true;
- ira_assert (ALLOCNO_UPDATED_HARD_REG_COSTS (a) == NULL);
- ira_assert (ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a) == NULL);
+ /* We don't need updated costs anymore. */
+ ira_free_allocno_updated_costs (a);
if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
{
fprintf (ira_dump_file, " Spill");
ira_print_expanded_allocno (a);
fprintf (ira_dump_file, "\n");
}
- continue;
}
- put_allocno_into_bucket (a);
+ }
+ /* Put the allocnos into the corresponding buckets. */
+ colorable_allocno_bucket = NULL;
+ uncolorable_allocno_bucket = NULL;
+ EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)
+ {
+ a = ira_allocnos[i];
+ if (ALLOCNO_COLOR_DATA (a)->in_graph_p)
+ put_allocno_into_bucket (a);
}
push_allocnos_to_stack ();
pop_allocnos_from_stack ();
+ finish_object_hard_regs_nodes_forest ();
}
+ improve_allocation ();
}
\f
EXECUTE_IF_SET_IN_BITMAP (loop_tree_node->border_allocnos, 0, j, bi)
fprintf (ira_dump_file, " %dr%d", j, ALLOCNO_REGNO (ira_allocnos[j]));
fprintf (ira_dump_file, "\n Pressure:");
- for (j = 0; (int) j < ira_reg_class_cover_size; j++)
+ for (j = 0; (int) j < ira_pressure_classes_num; j++)
{
- enum reg_class cover_class;
+ enum reg_class pclass;
- cover_class = ira_reg_class_cover[j];
- if (loop_tree_node->reg_pressure[cover_class] == 0)
+ pclass = ira_pressure_classes[j];
+ if (loop_tree_node->reg_pressure[pclass] == 0)
continue;
- fprintf (ira_dump_file, " %s=%d", reg_class_names[cover_class],
- loop_tree_node->reg_pressure[cover_class]);
+ fprintf (ira_dump_file, " %s=%d", reg_class_names[pclass],
+ loop_tree_node->reg_pressure[pclass]);
}
fprintf (ira_dump_file, "\n");
}
static void
color_pass (ira_loop_tree_node_t loop_tree_node)
{
- int regno, hard_regno, index = -1;
+ int i, regno, hard_regno, index = -1, n, nobj;
int cost, exit_freq, enter_freq;
unsigned int j;
bitmap_iterator bi;
enum machine_mode mode;
- enum reg_class rclass, cover_class;
+ enum reg_class rclass, aclass, pclass;
ira_allocno_t a, subloop_allocno;
ira_loop_tree_node_t subloop_node;
bitmap_copy (coloring_allocno_bitmap, loop_tree_node->all_allocnos);
bitmap_copy (consideration_allocno_bitmap, coloring_allocno_bitmap);
+ n = nobj = 0;
+ EXECUTE_IF_SET_IN_BITMAP (consideration_allocno_bitmap, 0, j, bi)
+ {
+ a = ira_allocnos[j];
+ n++;
+ nobj += ALLOCNO_NUM_OBJECTS (a);
+ if (! ALLOCNO_ASSIGNED_P (a))
+ continue;
+ bitmap_clear_bit (coloring_allocno_bitmap, ALLOCNO_NUM (a));
+ }
+ allocno_color_data
+ = (allocno_color_data_t) ira_allocate (sizeof (struct allocno_color_data)
+ * n);
+ memset (allocno_color_data, 0, sizeof (struct allocno_color_data) * n);
+ object_color_data
+ = (object_color_data_t) ira_allocate (sizeof (struct object_color_data)
+ * nobj);
+ memset (object_color_data, 0, sizeof (struct object_color_data) * nobj);
+ n = nobj = 0;
EXECUTE_IF_SET_IN_BITMAP (consideration_allocno_bitmap, 0, j, bi)
{
a = ira_allocnos[j];
- if (ALLOCNO_ASSIGNED_P (a))
- bitmap_clear_bit (coloring_allocno_bitmap, ALLOCNO_NUM (a));
+ ALLOCNO_ADD_DATA (a) = allocno_color_data + n;
+ n++;
+ for (i = 0; i < ALLOCNO_NUM_OBJECTS (a); i++)
+ {
+ OBJECT_ADD_DATA (ALLOCNO_OBJECT (a, i)) = object_color_data + nobj;
+ nobj++;
+ }
}
/* Color all mentioned allocnos including transparent ones. */
color_allocnos ();
continue;
/* Remove from processing in the next loop. */
bitmap_clear_bit (consideration_allocno_bitmap, j);
- rclass = ALLOCNO_COVER_CLASS (a);
+ rclass = ALLOCNO_CLASS (a);
+ pclass = ira_pressure_class_translate[rclass];
if (flag_ira_region == IRA_REGION_MIXED
- && (loop_tree_node->reg_pressure[rclass]
- <= ira_available_class_regs[rclass]))
+ && (loop_tree_node->reg_pressure[pclass]
+ <= ira_available_class_regs[pclass]))
{
mode = ALLOCNO_MODE (a);
hard_regno = ALLOCNO_HARD_REGNO (a);
a = ira_allocnos[j];
ira_assert (ALLOCNO_CAP_MEMBER (a) == NULL);
mode = ALLOCNO_MODE (a);
- rclass = ALLOCNO_COVER_CLASS (a);
+ rclass = ALLOCNO_CLASS (a);
+ pclass = ira_pressure_class_translate[rclass];
hard_regno = ALLOCNO_HARD_REGNO (a);
/* Use hard register class here. ??? */
if (hard_regno >= 0)
if (subloop_allocno == NULL
|| ALLOCNO_CAP (subloop_allocno) != NULL)
continue;
- ira_assert (ALLOCNO_COVER_CLASS (subloop_allocno) == rclass);
+ ira_assert (ALLOCNO_CLASS (subloop_allocno) == rclass);
ira_assert (bitmap_bit_p (subloop_node->all_allocnos,
ALLOCNO_NUM (subloop_allocno)));
if ((flag_ira_region == IRA_REGION_MIXED)
- && (loop_tree_node->reg_pressure[rclass]
- <= ira_available_class_regs[rclass]))
+ && (loop_tree_node->reg_pressure[pclass]
+ <= ira_available_class_regs[pclass]))
{
if (! ALLOCNO_ASSIGNED_P (subloop_allocno))
{
}
else
{
- cover_class = ALLOCNO_COVER_CLASS (subloop_allocno);
- cost = (ira_get_register_move_cost (mode, rclass, rclass)
+ aclass = ALLOCNO_CLASS (subloop_allocno);
+ ira_init_register_move_cost_if_necessary (mode);
+ cost = (ira_register_move_cost[mode][rclass][rclass]
* (exit_freq + enter_freq));
ira_allocate_and_set_or_copy_costs
- (&ALLOCNO_UPDATED_HARD_REG_COSTS (subloop_allocno), cover_class,
- ALLOCNO_UPDATED_COVER_CLASS_COST (subloop_allocno),
+ (&ALLOCNO_UPDATED_HARD_REG_COSTS (subloop_allocno), aclass,
+ ALLOCNO_UPDATED_CLASS_COST (subloop_allocno),
ALLOCNO_HARD_REG_COSTS (subloop_allocno));
ira_allocate_and_set_or_copy_costs
(&ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (subloop_allocno),
- cover_class, 0,
- ALLOCNO_CONFLICT_HARD_REG_COSTS (subloop_allocno));
+ aclass, 0, ALLOCNO_CONFLICT_HARD_REG_COSTS (subloop_allocno));
ALLOCNO_UPDATED_HARD_REG_COSTS (subloop_allocno)[index] -= cost;
ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (subloop_allocno)[index]
-= cost;
- if (ALLOCNO_UPDATED_COVER_CLASS_COST (subloop_allocno)
+ if (ALLOCNO_UPDATED_CLASS_COST (subloop_allocno)
> ALLOCNO_UPDATED_HARD_REG_COSTS (subloop_allocno)[index])
- ALLOCNO_UPDATED_COVER_CLASS_COST (subloop_allocno)
+ ALLOCNO_UPDATED_CLASS_COST (subloop_allocno)
= ALLOCNO_UPDATED_HARD_REG_COSTS (subloop_allocno)[index];
ALLOCNO_UPDATED_MEMORY_COST (subloop_allocno)
+= (ira_memory_move_cost[mode][rclass][0] * enter_freq
}
}
}
+ ira_free (object_color_data);
+ ira_free (allocno_color_data);
+ EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, j, bi)
+ {
+ a = ira_allocnos[j];
+ ALLOCNO_ADD_DATA (a) = NULL;
+ for (i = 0; i < ALLOCNO_NUM_OBJECTS (a); i++)
+ OBJECT_ADD_DATA (a) = NULL;
+ }
}
/* Initialize the common data for coloring and calls functions to do
do_coloring (void)
{
coloring_allocno_bitmap = ira_allocate_bitmap ();
- allocnos_for_spilling
- = (ira_allocno_t *) ira_allocate (sizeof (ira_allocno_t)
- * ira_allocnos_num);
- splay_tree_node_pool = create_alloc_pool ("splay tree nodes",
- sizeof (struct splay_tree_node_s),
- 100);
if (internal_flag_ira_verbose > 0 && ira_dump_file != NULL)
fprintf (ira_dump_file, "\n**** Allocnos coloring:\n\n");
if (internal_flag_ira_verbose > 1 && ira_dump_file != NULL)
ira_print_disposition (ira_dump_file);
- free_alloc_pool (splay_tree_node_pool);
ira_free_bitmap (coloring_allocno_bitmap);
- ira_free (allocnos_for_spilling);
}
\f
|| !bitmap_bit_p (loop_node->border_allocnos, ALLOCNO_NUM (a)))
continue;
mode = ALLOCNO_MODE (a);
- rclass = ALLOCNO_COVER_CLASS (a);
+ rclass = ALLOCNO_CLASS (a);
index = ira_class_hard_reg_index[rclass][hard_regno];
ira_assert (index >= 0);
cost = (ALLOCNO_MEMORY_COST (a)
- (ALLOCNO_HARD_REG_COSTS (a) == NULL
- ? ALLOCNO_COVER_CLASS_COST (a)
+ ? ALLOCNO_CLASS_COST (a)
: ALLOCNO_HARD_REG_COSTS (a)[index]));
+ ira_init_register_move_cost_if_necessary (mode);
for (subloop_node = loop_node->subloops;
subloop_node != NULL;
subloop_node = subloop_node->subloop_next)
subloop_allocno = subloop_node->regno_allocno_map[regno];
if (subloop_allocno == NULL)
continue;
- ira_assert (rclass == ALLOCNO_COVER_CLASS (subloop_allocno));
+ ira_assert (rclass == ALLOCNO_CLASS (subloop_allocno));
/* We have accumulated cost. To get the real cost of
allocno usage in the loop we should subtract costs of
the subloop allocnos. */
cost -= (ALLOCNO_MEMORY_COST (subloop_allocno)
- (ALLOCNO_HARD_REG_COSTS (subloop_allocno) == NULL
- ? ALLOCNO_COVER_CLASS_COST (subloop_allocno)
+ ? ALLOCNO_CLASS_COST (subloop_allocno)
: ALLOCNO_HARD_REG_COSTS (subloop_allocno)[index]));
exit_freq = ira_loop_edge_freq (subloop_node, regno, true);
enter_freq = ira_loop_edge_freq (subloop_node, regno, false);
+= (ira_memory_move_cost[mode][rclass][0] * exit_freq
+ ira_memory_move_cost[mode][rclass][1] * enter_freq);
if (hard_regno2 != hard_regno)
- cost -= (ira_get_register_move_cost (mode, rclass, rclass)
+ cost -= (ira_register_move_cost[mode][rclass][rclass]
* (exit_freq + enter_freq));
}
}
if ((parent = loop_node->parent) != NULL
&& (parent_allocno = parent->regno_allocno_map[regno]) != NULL)
{
- ira_assert (rclass == ALLOCNO_COVER_CLASS (parent_allocno));
+ ira_assert (rclass == ALLOCNO_CLASS (parent_allocno));
exit_freq = ira_loop_edge_freq (loop_node, regno, true);
enter_freq = ira_loop_edge_freq (loop_node, regno, false);
if ((hard_regno2 = ALLOCNO_HARD_REGNO (parent_allocno)) < 0)
+= (ira_memory_move_cost[mode][rclass][1] * exit_freq
+ ira_memory_move_cost[mode][rclass][0] * enter_freq);
if (hard_regno2 != hard_regno)
- cost -= (ira_get_register_move_cost (mode, rclass, rclass)
+ cost -= (ira_register_move_cost[mode][rclass][rclass]
* (exit_freq + enter_freq));
}
}
{
int i, hard_regno, cost;
enum machine_mode mode;
- enum reg_class cover_class, rclass;
+ enum reg_class aclass, rclass;
ira_allocno_t another_a;
ira_copy_t cp, next_cp;
ira_free_allocno_updated_costs (a);
ira_assert (! ALLOCNO_ASSIGNED_P (a));
- cover_class = ALLOCNO_COVER_CLASS (a);
- if (cover_class == NO_REGS)
+ aclass = ALLOCNO_CLASS (a);
+ if (aclass == NO_REGS)
return;
mode = ALLOCNO_MODE (a);
+ ira_init_register_move_cost_if_necessary (mode);
for (cp = ALLOCNO_COPIES (a); cp != NULL; cp = next_cp)
{
if (cp->first == a)
}
else
gcc_unreachable ();
- if (! ira_reg_classes_intersect_p[cover_class][ALLOCNO_COVER_CLASS
- (another_a)]
+ if (! ira_reg_classes_intersect_p[aclass][ALLOCNO_CLASS (another_a)]
|| ! ALLOCNO_ASSIGNED_P (another_a)
|| (hard_regno = ALLOCNO_HARD_REGNO (another_a)) < 0)
continue;
rclass = REGNO_REG_CLASS (hard_regno);
- i = ira_class_hard_reg_index[cover_class][hard_regno];
+ i = ira_class_hard_reg_index[aclass][hard_regno];
if (i < 0)
continue;
cost = (cp->first == a
- ? ira_get_register_move_cost (mode, rclass, cover_class)
- : ira_get_register_move_cost (mode, cover_class, rclass));
+ ? ira_register_move_cost[mode][rclass][aclass]
+ : ira_register_move_cost[mode][aclass][rclass]);
ira_allocate_and_set_or_copy_costs
- (&ALLOCNO_UPDATED_HARD_REG_COSTS (a),
- cover_class, ALLOCNO_COVER_CLASS_COST (a),
+ (&ALLOCNO_UPDATED_HARD_REG_COSTS (a), aclass, ALLOCNO_CLASS_COST (a),
ALLOCNO_HARD_REG_COSTS (a));
ira_allocate_and_set_or_copy_costs
(&ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a),
- cover_class, 0, ALLOCNO_CONFLICT_HARD_REG_COSTS (a));
+ aclass, 0, ALLOCNO_CONFLICT_HARD_REG_COSTS (a));
ALLOCNO_UPDATED_HARD_REG_COSTS (a)[i] -= cp->freq * cost;
ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a)[i] -= cp->freq * cost;
}
{
int i, allocnos_to_color_num;
ira_allocno_t a;
- enum reg_class cover_class;
+ enum reg_class aclass;
bitmap allocnos_to_color;
ira_allocno_iterator ai;
if (! ALLOCNO_ASSIGNED_P (a)
&& ! bitmap_bit_p (allocnos_to_color, ALLOCNO_NUM (a)))
{
- if (ALLOCNO_COVER_CLASS (a) != NO_REGS)
+ if (ALLOCNO_CLASS (a) != NO_REGS)
sorted_allocnos[allocnos_to_color_num++] = a;
else
{
bitmap_set_bit (allocnos_to_color, ALLOCNO_NUM (a));
}
if (ALLOCNO_REGNO (a) < start_regno
- || (cover_class = ALLOCNO_COVER_CLASS (a)) == NO_REGS)
+ || (aclass = ALLOCNO_CLASS (a)) == NO_REGS)
continue;
for (i = 0; i < n; i++)
{
ira_object_t obj = ALLOCNO_OBJECT (a, i);
ira_object_t conflict_obj;
ira_object_conflict_iterator oci;
+
FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)
{
ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj);
+
ira_assert (ira_reg_classes_intersect_p
- [cover_class][ALLOCNO_COVER_CLASS (conflict_a)]);
+ [aclass][ALLOCNO_CLASS (conflict_a)]);
if (!bitmap_set_bit (allocnos_to_color, ALLOCNO_NUM (conflict_a)))
continue;
sorted_allocnos[allocnos_to_color_num++] = conflict_a;
\f
+/* This page contains functions used to find conflicts using allocno
+ live ranges. */
+
+/* Return TRUE if live ranges of allocnos A1 and A2 intersect. It is
+ used to find a conflict for new allocnos or allocnos with the
+ different allocno classes. */
+static bool
+allocnos_conflict_by_live_ranges_p (ira_allocno_t a1, ira_allocno_t a2)
+{
+ rtx reg1, reg2;
+ int i, j;
+ int n1 = ALLOCNO_NUM_OBJECTS (a1);
+ int n2 = ALLOCNO_NUM_OBJECTS (a2);
+
+ if (a1 == a2)
+ return false;
+ reg1 = regno_reg_rtx[ALLOCNO_REGNO (a1)];
+ reg2 = regno_reg_rtx[ALLOCNO_REGNO (a2)];
+ if (reg1 != NULL && reg2 != NULL
+ && ORIGINAL_REGNO (reg1) == ORIGINAL_REGNO (reg2))
+ return false;
+
+ for (i = 0; i < n1; i++)
+ {
+ ira_object_t c1 = ALLOCNO_OBJECT (a1, i);
+
+ for (j = 0; j < n2; j++)
+ {
+ ira_object_t c2 = ALLOCNO_OBJECT (a2, j);
+
+ if (ira_live_ranges_intersect_p (OBJECT_LIVE_RANGES (c1),
+ OBJECT_LIVE_RANGES (c2)))
+ return true;
+ }
+ }
+ return false;
+}
+
+#ifdef ENABLE_IRA_CHECKING
+
+/* Return TRUE if live ranges of pseudo-registers REGNO1 and REGNO2
+ intersect. This should be used when there is only one region.
+ Currently this is used during reload. */
+static bool
+conflict_by_live_ranges_p (int regno1, int regno2)
+{
+ ira_allocno_t a1, a2;
+
+ ira_assert (regno1 >= FIRST_PSEUDO_REGISTER
+ && regno2 >= FIRST_PSEUDO_REGISTER);
+ /* Reg info caclulated by dataflow infrastructure can be different
+ from one calculated by regclass. */
+ if ((a1 = ira_loop_tree_root->regno_allocno_map[regno1]) == NULL
+ || (a2 = ira_loop_tree_root->regno_allocno_map[regno2]) == NULL)
+ return false;
+ return allocnos_conflict_by_live_ranges_p (a1, a2);
+}
+
+#endif
+
+\f
+
/* This page contains code to coalesce memory stack slots used by
spilled allocnos. This results in smaller stack frame, better data
locality, and in smaller code for some architectures like
coalescing. */
static bitmap processed_coalesced_allocno_bitmap;
+/* See below. */
+typedef struct coalesce_data *coalesce_data_t;
+
+/* To decrease footprint of ira_allocno structure we store all data
+ needed only for coalescing in the following structure. */
+struct coalesce_data
+{
+ /* Coalesced allocnos form a cyclic list. One allocno given by
+ FIRST represents all coalesced allocnos. The
+ list is chained by NEXT. */
+ ira_allocno_t first;
+ ira_allocno_t next;
+ int temp;
+};
+
+/* Container for storing allocno data concerning coalescing. */
+static coalesce_data_t allocno_coalesce_data;
+
+/* Macro to access the data concerning coalescing. */
+#define ALLOCNO_COALESCE_DATA(a) ((coalesce_data_t) ALLOCNO_ADD_DATA (a))
+
/* The function is used to sort allocnos according to their execution
frequencies. */
static int
{
ira_allocno_t a, first, last, next;
- first = ALLOCNO_FIRST_COALESCED_ALLOCNO (a1);
- if (first == ALLOCNO_FIRST_COALESCED_ALLOCNO (a2))
+ first = ALLOCNO_COALESCE_DATA (a1)->first;
+ a = ALLOCNO_COALESCE_DATA (a2)->first;
+ if (first == a)
return;
- for (last = a2, a = ALLOCNO_NEXT_COALESCED_ALLOCNO (a2);;
- a = ALLOCNO_NEXT_COALESCED_ALLOCNO (a))
+ for (last = a2, a = ALLOCNO_COALESCE_DATA (a2)->next;;
+ a = ALLOCNO_COALESCE_DATA (a)->next)
{
- ALLOCNO_FIRST_COALESCED_ALLOCNO (a) = first;
+ ALLOCNO_COALESCE_DATA (a)->first = first;
if (a == a2)
break;
last = a;
}
- next = ALLOCNO_NEXT_COALESCED_ALLOCNO (first);
- ALLOCNO_NEXT_COALESCED_ALLOCNO (first) = a2;
- ALLOCNO_NEXT_COALESCED_ALLOCNO (last) = next;
+ next = allocno_coalesce_data[ALLOCNO_NUM (first)].next;
+ allocno_coalesce_data[ALLOCNO_NUM (first)].next = a2;
+ allocno_coalesce_data[ALLOCNO_NUM (last)].next = next;
}
-/* Given two sets of coalesced sets of allocnos, A1 and A2, this
- function determines if any conflicts exist between the two sets.
- We use live ranges to find conflicts because conflicts are
- represented only for allocnos of the same cover class and during
- the reload pass we coalesce allocnos for sharing stack memory
- slots. */
+/* Return TRUE if there are conflicting allocnos from two sets of
+ coalesced allocnos given correspondingly by allocnos A1 and A2. We
+ use live ranges to find conflicts because conflicts are represented
+ only for allocnos of the same allocno class and during the reload
+ pass we coalesce allocnos for sharing stack memory slots. */
static bool
coalesced_allocno_conflict_p (ira_allocno_t a1, ira_allocno_t a2)
{
- ira_allocno_t a, conflict_allocno;
+ ira_allocno_t a, conflict_a;
- bitmap_clear (processed_coalesced_allocno_bitmap);
if (allocno_coalesced_p)
{
- for (a = ALLOCNO_NEXT_COALESCED_ALLOCNO (a1);;
- a = ALLOCNO_NEXT_COALESCED_ALLOCNO (a))
+ bitmap_clear (processed_coalesced_allocno_bitmap);
+ for (a = ALLOCNO_COALESCE_DATA (a1)->next;;
+ a = ALLOCNO_COALESCE_DATA (a)->next)
{
- bitmap_set_bit (processed_coalesced_allocno_bitmap,
- OBJECT_CONFLICT_ID (ALLOCNO_OBJECT (a, 0)));
+ bitmap_set_bit (processed_coalesced_allocno_bitmap, ALLOCNO_NUM (a));
if (a == a1)
break;
}
}
- for (a = ALLOCNO_NEXT_COALESCED_ALLOCNO (a2);;
- a = ALLOCNO_NEXT_COALESCED_ALLOCNO (a))
+ for (a = ALLOCNO_COALESCE_DATA (a2)->next;;
+ a = ALLOCNO_COALESCE_DATA (a)->next)
{
- for (conflict_allocno = ALLOCNO_NEXT_COALESCED_ALLOCNO (a1);;
- conflict_allocno
- = ALLOCNO_NEXT_COALESCED_ALLOCNO (conflict_allocno))
+ for (conflict_a = ALLOCNO_COALESCE_DATA (a1)->next;;
+ conflict_a = ALLOCNO_COALESCE_DATA (conflict_a)->next)
{
- if (allocnos_have_intersected_live_ranges_p (a, conflict_allocno))
+ if (allocnos_conflict_by_live_ranges_p (a, conflict_a))
return true;
- if (conflict_allocno == a1)
+ if (conflict_a == a1)
break;
}
-
if (a == a2)
break;
}
next_cp = cp->next_first_allocno_copy;
regno = ALLOCNO_REGNO (cp->second);
/* For priority coloring we coalesce allocnos only with
- the same cover class not with intersected cover
+ the same allocno class not with intersected allocno
classes as it were possible. It is done for
simplicity. */
if ((cp->insn != NULL || cp->constraint_p)
for (n = 0; i < cp_num; i++)
{
cp = sorted_copies[i];
- if (ALLOCNO_FIRST_COALESCED_ALLOCNO (cp->first)
- != ALLOCNO_FIRST_COALESCED_ALLOCNO (cp->second))
+ if (allocno_coalesce_data[ALLOCNO_NUM (cp->first)].first
+ != allocno_coalesce_data[ALLOCNO_NUM (cp->second)].first)
sorted_copies[n++] = cp;
}
cp_num = n;
if ((diff = slot_num1 - slot_num2) != 0)
return (frame_pointer_needed
|| !FRAME_GROWS_DOWNWARD == STACK_GROWS_DOWNWARD ? diff : -diff);
- total_size1 = MAX (PSEUDO_REGNO_BYTES (regno1), regno_max_ref_width[regno1]);
- total_size2 = MAX (PSEUDO_REGNO_BYTES (regno2), regno_max_ref_width[regno2]);
+ total_size1 = MAX (PSEUDO_REGNO_BYTES (regno1),
+ regno_max_ref_width[regno1]);
+ total_size2 = MAX (PSEUDO_REGNO_BYTES (regno2),
+ regno_max_ref_width[regno2]);
if ((diff = total_size2 - total_size1) != 0)
return diff;
return regno1 - regno2;
regno_coalesced_allocno_num[regno] = ++num;
continue;
}
- if (ALLOCNO_FIRST_COALESCED_ALLOCNO (allocno) != allocno)
+ if (ALLOCNO_COALESCE_DATA (allocno)->first != allocno)
continue;
num++;
- for (cost = 0, a = ALLOCNO_NEXT_COALESCED_ALLOCNO (allocno);;
- a = ALLOCNO_NEXT_COALESCED_ALLOCNO (a))
+ for (cost = 0, a = ALLOCNO_COALESCE_DATA (allocno)->next;;
+ a = ALLOCNO_COALESCE_DATA (a)->next)
{
cost += ALLOCNO_FREQ (a);
if (a == allocno)
break;
}
- for (a = ALLOCNO_NEXT_COALESCED_ALLOCNO (allocno);;
- a = ALLOCNO_NEXT_COALESCED_ALLOCNO (a))
+ for (a = ALLOCNO_COALESCE_DATA (allocno)->next;;
+ a = ALLOCNO_COALESCE_DATA (a)->next)
{
regno_coalesced_allocno_num[ALLOCNO_REGNO (a)] = num;
regno_coalesced_allocno_cost[ALLOCNO_REGNO (a)] = cost;
regno = pseudo_regnos[i];
allocno = ira_regno_allocno_map[regno];
if (allocno == NULL || ALLOCNO_HARD_REGNO (allocno) >= 0
- || ALLOCNO_FIRST_COALESCED_ALLOCNO (allocno) != allocno)
+ || ALLOCNO_COALESCE_DATA (allocno)->first != allocno)
continue;
spilled_coalesced_allocnos[num++] = allocno;
}
{
ira_allocno_t a;
- for (a = ALLOCNO_NEXT_COALESCED_ALLOCNO (allocno);;
- a = ALLOCNO_NEXT_COALESCED_ALLOCNO (a))
+ for (a = ALLOCNO_COALESCE_DATA (allocno)->next;;
+ a = ALLOCNO_COALESCE_DATA (a)->next)
{
int i;
int nr = ALLOCNO_NUM_OBJECTS (a);
+
for (i = 0; i < nr; i++)
{
ira_object_t obj = ALLOCNO_OBJECT (a, i);
- if (ira_live_ranges_intersect_p (slot_coalesced_allocnos_live_ranges[n],
- OBJECT_LIVE_RANGES (obj)))
+
+ if (ira_live_ranges_intersect_p
+ (slot_coalesced_allocnos_live_ranges[n],
+ OBJECT_LIVE_RANGES (obj)))
return true;
}
if (a == allocno)
ira_allocno_t a;
live_range_t r;
- n = ALLOCNO_TEMP (allocno);
- for (a = ALLOCNO_NEXT_COALESCED_ALLOCNO (allocno);;
- a = ALLOCNO_NEXT_COALESCED_ALLOCNO (a))
+ n = ALLOCNO_COALESCE_DATA (allocno)->temp;
+ for (a = ALLOCNO_COALESCE_DATA (allocno)->next;;
+ a = ALLOCNO_COALESCE_DATA (a)->next)
{
int nr = ALLOCNO_NUM_OBJECTS (a);
for (i = 0; i < nr; i++)
{
ira_object_t obj = ALLOCNO_OBJECT (a, i);
+
r = ira_copy_live_range_list (OBJECT_LIVE_RANGES (obj));
slot_coalesced_allocnos_live_ranges[n]
= ira_merge_live_ranges
- (slot_coalesced_allocnos_live_ranges[n], r);
+ (slot_coalesced_allocnos_live_ranges[n], r);
}
if (a == allocno)
break;
for (i = 0; i < num; i++)
{
allocno = spilled_coalesced_allocnos[i];
- if (ALLOCNO_FIRST_COALESCED_ALLOCNO (allocno) != allocno
+ if (ALLOCNO_COALESCE_DATA (allocno)->first != allocno
|| bitmap_bit_p (set_jump_crosses, ALLOCNO_REGNO (allocno))
|| (ALLOCNO_REGNO (allocno) < ira_reg_equiv_len
&& (ira_reg_equiv_const[ALLOCNO_REGNO (allocno)] != NULL_RTX
for (j = 0; j < i; j++)
{
a = spilled_coalesced_allocnos[j];
- n = ALLOCNO_TEMP (a);
- if (ALLOCNO_FIRST_COALESCED_ALLOCNO (a) == a
+ n = ALLOCNO_COALESCE_DATA (a)->temp;
+ if (ALLOCNO_COALESCE_DATA (a)->first == a
&& ! bitmap_bit_p (set_jump_crosses, ALLOCNO_REGNO (a))
&& (ALLOCNO_REGNO (a) >= ira_reg_equiv_len
|| (! ira_reg_equiv_invariant_p[ALLOCNO_REGNO (a)]
{
/* No coalescing: set up number for coalesced allocnos
represented by ALLOCNO. */
- ALLOCNO_TEMP (allocno) = last_coalesced_allocno_num++;
+ ALLOCNO_COALESCE_DATA (allocno)->temp = last_coalesced_allocno_num++;
setup_slot_coalesced_allocno_live_ranges (allocno);
}
else
" Coalescing spilled allocnos a%dr%d->a%dr%d\n",
ALLOCNO_NUM (allocno), ALLOCNO_REGNO (allocno),
ALLOCNO_NUM (a), ALLOCNO_REGNO (a));
- ALLOCNO_TEMP (allocno) = ALLOCNO_TEMP (a);
+ ALLOCNO_COALESCE_DATA (allocno)->temp
+ = ALLOCNO_COALESCE_DATA (a)->temp;
setup_slot_coalesced_allocno_live_ranges (allocno);
merge_allocnos (a, allocno);
- ira_assert (ALLOCNO_FIRST_COALESCED_ALLOCNO (a) == a);
+ ira_assert (ALLOCNO_COALESCE_DATA (a)->first == a);
}
}
for (i = 0; i < ira_allocnos_num; i++)
regno = pseudo_regnos[i];
allocno = ira_regno_allocno_map[regno];
if (allocno != NULL)
- bitmap_set_bit (coloring_allocno_bitmap,
- ALLOCNO_NUM (allocno));
+ bitmap_set_bit (coloring_allocno_bitmap, ALLOCNO_NUM (allocno));
}
allocno_coalesced_p = false;
processed_coalesced_allocno_bitmap = ira_allocate_bitmap ();
+ allocno_coalesce_data
+ = (coalesce_data_t) ira_allocate (sizeof (struct coalesce_data)
+ * ira_allocnos_num);
+ /* Initialize coalesce data for allocnos. */
+ FOR_EACH_ALLOCNO (a, ai)
+ {
+ ALLOCNO_ADD_DATA (a) = allocno_coalesce_data + ALLOCNO_NUM (a);
+ ALLOCNO_COALESCE_DATA (a)->first = a;
+ ALLOCNO_COALESCE_DATA (a)->next = a;
+ }
coalesce_allocnos ();
ira_free_bitmap (coloring_allocno_bitmap);
regno_coalesced_allocno_cost
for (i = 0; i < num; i++)
{
allocno = spilled_coalesced_allocnos[i];
- if (ALLOCNO_FIRST_COALESCED_ALLOCNO (allocno) != allocno
+ if (ALLOCNO_COALESCE_DATA (allocno)->first != allocno
|| ALLOCNO_HARD_REGNO (allocno) >= 0
|| (ALLOCNO_REGNO (allocno) < ira_reg_equiv_len
&& (ira_reg_equiv_const[ALLOCNO_REGNO (allocno)] != NULL_RTX
if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
fprintf (ira_dump_file, " Slot %d (freq,size):", slot_num);
slot_num++;
- for (a = ALLOCNO_NEXT_COALESCED_ALLOCNO (allocno);;
- a = ALLOCNO_NEXT_COALESCED_ALLOCNO (a))
+ for (a = ALLOCNO_COALESCE_DATA (allocno)->next;;
+ a = ALLOCNO_COALESCE_DATA (a)->next)
{
ira_assert (ALLOCNO_HARD_REGNO (a) < 0);
ALLOCNO_HARD_REGNO (a) = -slot_num;
/* Sort regnos according the slot numbers. */
regno_max_ref_width = reg_max_ref_width;
qsort (pseudo_regnos, n, sizeof (int), coalesced_pseudo_reg_slot_compare);
- /* Uncoalesce allocnos which is necessary for (re)assigning during
- the reload pass. */
FOR_EACH_ALLOCNO (a, ai)
- {
- ALLOCNO_FIRST_COALESCED_ALLOCNO (a) = a;
- ALLOCNO_NEXT_COALESCED_ALLOCNO (a) = a;
- }
+ ALLOCNO_ADD_DATA (a) = NULL;
+ ira_free (allocno_coalesce_data);
ira_free (regno_coalesced_allocno_num);
ira_free (regno_coalesced_allocno_cost);
}
{
ira_allocno_t a = ira_regno_allocno_map[regno];
int old_hard_regno, hard_regno, cost;
- enum reg_class cover_class = ALLOCNO_COVER_CLASS (a);
+ enum reg_class aclass = ALLOCNO_CLASS (a);
ira_assert (a != NULL);
hard_regno = reg_renumber[regno];
cost = -ALLOCNO_MEMORY_COST (a);
else
{
- ira_assert (ira_class_hard_reg_index[cover_class][old_hard_regno] >= 0);
+ ira_assert (ira_class_hard_reg_index[aclass][old_hard_regno] >= 0);
cost = -(ALLOCNO_HARD_REG_COSTS (a) == NULL
- ? ALLOCNO_COVER_CLASS_COST (a)
+ ? ALLOCNO_CLASS_COST (a)
: ALLOCNO_HARD_REG_COSTS (a)
- [ira_class_hard_reg_index[cover_class][old_hard_regno]]);
+ [ira_class_hard_reg_index[aclass][old_hard_regno]]);
update_copy_costs (a, false);
}
ira_overall_cost -= cost;
ALLOCNO_HARD_REGNO (a) = -1;
cost += ALLOCNO_MEMORY_COST (a);
}
- else if (ira_class_hard_reg_index[cover_class][hard_regno] >= 0)
+ else if (ira_class_hard_reg_index[aclass][hard_regno] >= 0)
{
cost += (ALLOCNO_HARD_REG_COSTS (a) == NULL
- ? ALLOCNO_COVER_CLASS_COST (a)
+ ? ALLOCNO_CLASS_COST (a)
: ALLOCNO_HARD_REG_COSTS (a)
- [ira_class_hard_reg_index[cover_class][hard_regno]]);
+ [ira_class_hard_reg_index[aclass][hard_regno]]);
update_copy_costs (a, true);
}
else
allocno_reload_assign (ira_allocno_t a, HARD_REG_SET forbidden_regs)
{
int hard_regno;
- enum reg_class cover_class;
+ enum reg_class aclass;
int regno = ALLOCNO_REGNO (a);
HARD_REG_SET saved[2];
int i, n;
call_used_reg_set);
}
ALLOCNO_ASSIGNED_P (a) = false;
- cover_class = ALLOCNO_COVER_CLASS (a);
+ aclass = ALLOCNO_CLASS (a);
update_curr_costs (a);
assign_hard_reg (a, true);
hard_regno = ALLOCNO_HARD_REGNO (a);
ALLOCNO_HARD_REGNO (a) = -1;
else
{
- ira_assert (ira_class_hard_reg_index[cover_class][hard_regno] >= 0);
- ira_overall_cost -= (ALLOCNO_MEMORY_COST (a)
- - (ALLOCNO_HARD_REG_COSTS (a) == NULL
- ? ALLOCNO_COVER_CLASS_COST (a)
- : ALLOCNO_HARD_REG_COSTS (a)
- [ira_class_hard_reg_index
- [cover_class][hard_regno]]));
+ ira_assert (ira_class_hard_reg_index[aclass][hard_regno] >= 0);
+ ira_overall_cost
+ -= (ALLOCNO_MEMORY_COST (a)
+ - (ALLOCNO_HARD_REG_COSTS (a) == NULL
+ ? ALLOCNO_CLASS_COST (a)
+ : ALLOCNO_HARD_REG_COSTS (a)[ira_class_hard_reg_index
+ [aclass][hard_regno]]));
if (ALLOCNO_CALLS_CROSSED_NUM (a) != 0
- && ! ira_hard_reg_not_in_set_p (hard_regno, ALLOCNO_MODE (a),
- call_used_reg_set))
+ && ira_hard_reg_set_intersection_p (hard_regno, ALLOCNO_MODE (a),
+ call_used_reg_set))
{
ira_assert (flag_caller_saves);
caller_save_needed = 1;
fprintf (ira_dump_file,
" Try Assign %d(a%d), cost=%d", regno, ALLOCNO_NUM (a),
ALLOCNO_MEMORY_COST (a)
- - ALLOCNO_COVER_CLASS_COST (a));
+ - ALLOCNO_CLASS_COST (a));
allocno_reload_assign (a, forbidden_regs);
if (reg_renumber[regno] >= 0)
{
FIRST_PSEUDO_REGISTER, i, bi)
{
another_allocno = ira_regno_allocno_map[i];
- if (allocnos_have_intersected_live_ranges_p (allocno,
- another_allocno))
+ if (allocnos_conflict_by_live_ranges_p (allocno,
+ another_allocno))
goto cont;
}
for (cost = 0, cp = ALLOCNO_COPIES (allocno);
EXECUTE_IF_SET_IN_BITMAP (&slot->spilled_regs,
FIRST_PSEUDO_REGISTER, i, bi)
{
- ira_assert (! pseudos_have_intersected_live_ranges_p (regno, i));
+ ira_assert (! conflict_by_live_ranges_p (regno, i));
}
#endif
SET_REGNO_REG_SET (&slot->spilled_regs, regno);
ira_assert (hard_regno >= 0);
a = ira_regno_allocno_map[regno];
length += ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (a) / ALLOCNO_NUM_OBJECTS (a);
- cost += ALLOCNO_MEMORY_COST (a) - ALLOCNO_COVER_CLASS_COST (a);
+ cost += ALLOCNO_MEMORY_COST (a) - ALLOCNO_CLASS_COST (a);
nregs = hard_regno_nregs[hard_regno][ALLOCNO_MODE (a)];
for (j = 0; j < nregs; j++)
if (! TEST_HARD_REG_BIT (call_used_reg_set, hard_regno + j))
saved_cost = 0;
if (in_p)
saved_cost += ira_memory_move_cost
- [ALLOCNO_MODE (a)][ALLOCNO_COVER_CLASS (a)][1];
+ [ALLOCNO_MODE (a)][ALLOCNO_CLASS (a)][1];
if (out_p)
saved_cost
+= ira_memory_move_cost
- [ALLOCNO_MODE (a)][ALLOCNO_COVER_CLASS (a)][0];
+ [ALLOCNO_MODE (a)][ALLOCNO_CLASS (a)][0];
cost -= REG_FREQ_FROM_BB (BLOCK_FOR_INSN (insn)) * saved_cost;
}
}
color (void)
{
allocno_stack_vec = VEC_alloc (ira_allocno_t, heap, ira_allocnos_num);
- removed_splay_allocno_vec
- = VEC_alloc (ira_allocno_t, heap, ira_allocnos_num);
memset (allocated_hardreg_p, 0, sizeof (allocated_hardreg_p));
ira_initiate_assign ();
do_coloring ();
ira_finish_assign ();
- VEC_free (ira_allocno_t, heap, removed_splay_allocno_vec);
VEC_free (ira_allocno_t, heap, allocno_stack_vec);
move_spill_restore ();
}
#ifdef STACK_REGS
bool no_stack_reg_p;
#endif
- enum reg_class cover_class;
+ enum reg_class aclass;
enum machine_mode mode;
ira_allocno_t a;
ira_allocno_iterator ai;
for (j = r->start; j <= r->finish; j++)
IOR_HARD_REG_SET (conflict_hard_regs, used_hard_regs[j]);
}
- cover_class = ALLOCNO_COVER_CLASS (a);
+ aclass = ALLOCNO_CLASS (a);
ALLOCNO_ASSIGNED_P (a) = true;
ALLOCNO_HARD_REGNO (a) = -1;
- if (hard_reg_set_subset_p (reg_class_contents[cover_class],
+ if (hard_reg_set_subset_p (reg_class_contents[aclass],
conflict_hard_regs))
continue;
mode = ALLOCNO_MODE (a);
#ifdef STACK_REGS
no_stack_reg_p = ALLOCNO_NO_STACK_REG_P (a);
#endif
- class_size = ira_class_hard_regs_num[cover_class];
+ class_size = ira_class_hard_regs_num[aclass];
for (j = 0; j < class_size; j++)
{
- hard_regno = ira_class_hard_regs[cover_class][j];
+ hard_regno = ira_class_hard_regs[aclass][j];
#ifdef STACK_REGS
if (no_stack_reg_p && FIRST_STACK_REG <= hard_regno
&& hard_regno <= LAST_STACK_REG)
continue;
#endif
- if (!ira_hard_reg_not_in_set_p (hard_regno, mode, conflict_hard_regs)
+ if (ira_hard_reg_set_intersection_p (hard_regno, mode, conflict_hard_regs)
|| (TEST_HARD_REG_BIT
- (prohibited_class_mode_regs[cover_class][mode], hard_regno)))
+ (ira_prohibited_class_mode_regs[aclass][mode], hard_regno)))
continue;
ALLOCNO_HARD_REGNO (a) = hard_regno;
for (l = 0; l < nr; l++)
FOR_EACH_ALLOCNO (a, ai)
{
ALLOCNO_UPDATED_MEMORY_COST (a) = ALLOCNO_MEMORY_COST (a);
- ALLOCNO_UPDATED_COVER_CLASS_COST (a) = ALLOCNO_COVER_CLASS_COST (a);
+ ALLOCNO_UPDATED_CLASS_COST (a) = ALLOCNO_CLASS_COST (a);
}
if (ira_conflicts_p)
color ();