/* Callgraph based analysis of static variables.
- Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
Contributed by Kenneth Zadeck <zadeck@naturalbridge.com>
This file is part of GCC.
#include "tree-pass.h"
#include "langhooks.h"
#include "pointer-set.h"
+#include "splay-tree.h"
#include "ggc.h"
#include "ipa-utils.h"
#include "ipa-reference.h"
-#include "c-common.h"
#include "gimple.h"
#include "cgraph.h"
#include "output.h"
#include "timevar.h"
#include "diagnostic.h"
#include "langhooks.h"
+#include "lto-streamer.h"
+
+static void add_new_function (struct cgraph_node *node,
+ void *data ATTRIBUTE_UNUSED);
+static void remove_node_data (struct cgraph_node *node,
+ void *data ATTRIBUTE_UNUSED);
+static void duplicate_node_data (struct cgraph_node *src,
+ struct cgraph_node *dst,
+ void *data ATTRIBUTE_UNUSED);
+
+/* The static variables defined within the compilation unit that are
+ loaded or stored directly by function that owns this structure. */
+
+struct ipa_reference_local_vars_info_d
+{
+ bitmap statics_read;
+ bitmap statics_written;
+
+ /* Set when this function calls another function external to the
+ compilation unit or if the function has a asm clobber of memory.
+ In general, such calls are modeled as reading and writing all
+ variables (both bits on) but sometime there are attributes on the
+ called function so we can do better. */
+ bool calls_read_all;
+ bool calls_write_all;
+};
+
+/* Statics that are read and written by some set of functions. The
+ local ones are based on the loads and stores local to the function.
+ The global ones are based on the local info as well as the
+ transitive closure of the functions that are called. The
+ structures are separated to allow the global structures to be
+ shared between several functions since every function within a
+ strongly connected component will have the same information. This
+ sharing saves both time and space in the computation of the vectors
+ as well as their translation from decl_uid form to ann_uid
+ form. */
+
+struct ipa_reference_global_vars_info_d
+{
+ bitmap statics_read;
+ bitmap statics_written;
+ bitmap statics_not_read;
+ bitmap statics_not_written;
+};
+
+typedef struct ipa_reference_local_vars_info_d *ipa_reference_local_vars_info_t;
+typedef struct ipa_reference_global_vars_info_d *ipa_reference_global_vars_info_t;
+struct ipa_reference_vars_info_d
+{
+ ipa_reference_local_vars_info_t local;
+ ipa_reference_global_vars_info_t global;
+};
+
+typedef struct ipa_reference_vars_info_d *ipa_reference_vars_info_t;
/* This splay tree contains all of the static variables that are
being considered by the compilation level alias analysis. For
/* Holders of ipa cgraph hooks: */
static struct cgraph_node_hook_list *function_insertion_hook_holder;
+static struct cgraph_2node_hook_list *node_duplication_hook_holder;
+static struct cgraph_node_hook_list *node_removal_hook_holder;
enum initialization_status_t
{
tree memory_identifier_string;
+/* Vector where the reference var infos are actually stored. */
+DEF_VEC_P (ipa_reference_vars_info_t);
+DEF_VEC_ALLOC_P (ipa_reference_vars_info_t, heap);
+static VEC (ipa_reference_vars_info_t, heap) *ipa_reference_vars_vector;
+
/* Return the ipa_reference_vars structure starting from the cgraph NODE. */
static inline ipa_reference_vars_info_t
-get_reference_vars_info_from_cgraph (struct cgraph_node * node)
+get_reference_vars_info (struct cgraph_node *node)
+{
+ if (!ipa_reference_vars_vector
+ || VEC_length (ipa_reference_vars_info_t, ipa_reference_vars_vector) <= (unsigned int)node->uid)
+ return NULL;
+ return VEC_index (ipa_reference_vars_info_t, ipa_reference_vars_vector, node->uid);
+}
+
+/* Return the ipa_reference_vars structure starting from the cgraph NODE. */
+static inline void
+set_reference_vars_info (struct cgraph_node *node, ipa_reference_vars_info_t info)
{
- return get_function_ann (node->decl)->reference_vars_info;
+ if (!ipa_reference_vars_vector
+ || VEC_length (ipa_reference_vars_info_t, ipa_reference_vars_vector) <= (unsigned int)node->uid)
+ VEC_safe_grow_cleared (ipa_reference_vars_info_t, heap, ipa_reference_vars_vector, node->uid + 1);
+ VEC_replace (ipa_reference_vars_info_t, ipa_reference_vars_vector, node->uid, info);
}
/* Get a bitmap that contains all of the locally referenced static
variables for function FN. */
static ipa_reference_local_vars_info_t
-get_local_reference_vars_info (tree fn)
+get_local_reference_vars_info (struct cgraph_node *fn)
{
- ipa_reference_vars_info_t info = get_function_ann (fn)->reference_vars_info;
+ ipa_reference_vars_info_t info = get_reference_vars_info (fn);
if (info)
return info->local;
variables for function FN. */
static ipa_reference_global_vars_info_t
-get_global_reference_vars_info (tree fn)
+get_global_reference_vars_info (struct cgraph_node *fn)
{
- ipa_reference_vars_info_t info = get_function_ann (fn)->reference_vars_info;
+ ipa_reference_vars_info_t info = get_reference_vars_info (fn);
if (info)
return info->global;
}
/* Return a bitmap indexed by VAR_DECL uid for the static variables
- that may be read locally by the execution of the function fn.
- Returns NULL if no data is available. */
-
-bitmap
-ipa_reference_get_read_local (tree fn)
-{
- ipa_reference_local_vars_info_t l = get_local_reference_vars_info (fn);
- if (l)
- return l->statics_read;
- else
- return NULL;
-}
-
-/* Return a bitmap indexed by VAR_DECL uid for the static variables
- that may be written locally by the execution of the function fn.
- Returns NULL if no data is available. */
-
-bitmap
-ipa_reference_get_written_local (tree fn)
-{
- ipa_reference_local_vars_info_t l = get_local_reference_vars_info (fn);
- if (l)
- return l->statics_written;
- else
- return NULL;
-}
-
-/* Return a bitmap indexed by VAR_DECL uid for the static variables
that are read during the execution of the function FN. Returns
NULL if no data is available. */
bitmap
-ipa_reference_get_read_global (tree fn)
+ipa_reference_get_read_global (struct cgraph_node *fn)
{
ipa_reference_global_vars_info_t g = get_global_reference_vars_info (fn);
if (g)
call. Returns NULL if no data is available. */
bitmap
-ipa_reference_get_written_global (tree fn)
+ipa_reference_get_written_global (struct cgraph_node *fn)
{
ipa_reference_global_vars_info_t g = get_global_reference_vars_info (fn);
if (g)
NULL if no data is available. */
bitmap
-ipa_reference_get_not_read_global (tree fn)
+ipa_reference_get_not_read_global (struct cgraph_node *fn)
{
ipa_reference_global_vars_info_t g = get_global_reference_vars_info (fn);
if (g)
call. Returns NULL if no data is available. */
bitmap
-ipa_reference_get_not_written_global (tree fn)
+ipa_reference_get_not_written_global (struct cgraph_node *fn)
{
ipa_reference_global_vars_info_t g = get_global_reference_vars_info (fn);
if (g)
bitmap_set_bit (module_statics_escape, DECL_UID (x));
}
+/* Wrapper around mark_address_taken for the stmt walker. */
+
+static bool
+mark_address (gimple stmt ATTRIBUTE_UNUSED, tree addr,
+ void *data ATTRIBUTE_UNUSED)
+{
+ while (handled_component_p (addr))
+ addr = TREE_OPERAND (addr, 0);
+ mark_address_taken (addr);
+ return false;
+}
+
/* Mark load of T. */
-static void
-mark_load (ipa_reference_local_vars_info_t local,
- tree t)
+static bool
+mark_load (gimple stmt ATTRIBUTE_UNUSED, tree t, void *data)
{
+ ipa_reference_local_vars_info_t local = (ipa_reference_local_vars_info_t)data;
if (TREE_CODE (t) == VAR_DECL
&& has_proper_scope_for_analysis (t))
bitmap_set_bit (local->statics_read, DECL_UID (t));
+ return false;
}
/* Mark store of T. */
-static void
-mark_store (ipa_reference_local_vars_info_t local,
- tree t)
+static bool
+mark_store (gimple stmt ATTRIBUTE_UNUSED, tree t, void *data)
{
+ ipa_reference_local_vars_info_t local = (ipa_reference_local_vars_info_t)data;
if (TREE_CODE (t) == VAR_DECL
&& has_proper_scope_for_analysis (t))
{
if (module_statics_written)
bitmap_set_bit (module_statics_written, DECL_UID (t));
}
+ return false;
}
/* Look for memory clobber and set read_all/write_all if present. */
avail = cgraph_function_body_availability (callee);
}
- if (avail == AVAIL_NOT_AVAILABLE || avail == AVAIL_OVERWRITABLE)
+ if (avail <= AVAIL_OVERWRITABLE)
if (local)
{
if (flags & ECF_CONST)
{
gimple stmt = gsi_stmt (*gsip);
ipa_reference_local_vars_info_t local = NULL;
- unsigned int i;
- bitmap_iterator bi;
+
+ if (is_gimple_debug (stmt))
+ return NULL;
if (fn)
- local = get_reference_vars_info_from_cgraph (fn)->local;
-
- if (gimple_loaded_syms (stmt))
- EXECUTE_IF_SET_IN_BITMAP (gimple_loaded_syms (stmt), 0, i, bi)
- mark_load (local, referenced_var_lookup (i));
- if (gimple_stored_syms (stmt))
- EXECUTE_IF_SET_IN_BITMAP (gimple_stored_syms (stmt), 0, i, bi)
- mark_store (local, referenced_var_lookup (i));
- if (gimple_addresses_taken (stmt))
- EXECUTE_IF_SET_IN_BITMAP (gimple_addresses_taken (stmt), 0, i, bi)
- mark_address_taken (referenced_var_lookup (i));
-
- switch (gimple_code (stmt))
- {
- case GIMPLE_CALL:
- check_call (local, stmt);
- break;
-
- case GIMPLE_ASM:
- check_asm_memory_clobber (local, stmt);
- break;
+ local = get_reference_vars_info (fn)->local;
- /* We used to check nonlocal labels here and set them as potentially modifying
- everything. This is not needed, since we can get to nonlocal label only
- from callee and thus we will get info propagated. */
+ /* Look for direct loads and stores. */
+ walk_stmt_load_store_addr_ops (stmt, local, mark_load, mark_store,
+ mark_address);
- default:
- break;
- }
+ if (is_gimple_call (stmt))
+ check_call (local, stmt);
+ else if (gimple_code (stmt) == GIMPLE_ASM)
+ check_asm_memory_clobber (local, stmt);
return NULL;
}
return NULL;
}
-/* Or in all of the bits from every callee into X, the caller's, bit
- vector. There are several cases to check to avoid the sparse
+/* Or in all of the bits from every callee of X into X_GLOBAL, the caller's cycle,
+ bit vector. There are several cases to check to avoid the sparse
bitmap oring. */
static void
-propagate_bits (struct cgraph_node *x)
+propagate_bits (ipa_reference_global_vars_info_t x_global, struct cgraph_node *x)
{
- ipa_reference_vars_info_t x_info = get_reference_vars_info_from_cgraph (x);
- ipa_reference_global_vars_info_t x_global = x_info->global;
-
struct cgraph_edge *e;
for (e = x->callees; e; e = e->next_callee)
{
struct cgraph_node *y = e->callee;
/* Only look at the master nodes and skip external nodes. */
- y = cgraph_master_clone (y);
- if (y)
+ if (cgraph_function_body_availability (e->callee) > AVAIL_OVERWRITABLE)
{
- if (get_reference_vars_info_from_cgraph (y))
+ if (get_reference_vars_info (y))
{
ipa_reference_vars_info_t y_info
- = get_reference_vars_info_from_cgraph (y);
+ = get_reference_vars_info (y);
ipa_reference_global_vars_info_t y_global = y_info->global;
+
+ /* Calls in current cycle do not have global computed yet. */
+ if (!y_info->global)
+ continue;
if (x_global->statics_read
!= all_module_statics)
}
}
-/* Look at all of the callees of X to see which ones represent inlined
- calls. For each of these callees, merge their local info into
- TARGET and check their children recursively.
-
- This function goes away when Jan changes the inliner and IPA
- analysis so that this is not run between the time when inlining
- decisions are made and when the inlining actually occurs. */
-
+/* The init routine for analyzing global static variable usage. See
+ comments at top for description. */
static void
-merge_callee_local_info (struct cgraph_node *target,
- struct cgraph_node *x)
+ipa_init (void)
{
- struct cgraph_edge *e;
- ipa_reference_local_vars_info_t x_l =
- get_reference_vars_info_from_cgraph (target)->local;
+ static bool init_p = false;
- /* Make the world safe for tail recursion. */
- struct ipa_dfs_info *node_info = (struct ipa_dfs_info *) x->aux;
-
- if (node_info->aux)
+ if (init_p)
return;
- node_info->aux = x;
-
- for (e = x->callees; e; e = e->next_callee)
- {
- struct cgraph_node *y = e->callee;
- if (y->global.inlined_to)
- {
- ipa_reference_vars_info_t y_info;
- ipa_reference_local_vars_info_t y_l;
- struct cgraph_node* orig_y = y;
-
- y = cgraph_master_clone (y);
- if (y)
- {
- y_info = get_reference_vars_info_from_cgraph (y);
- y_l = y_info->local;
- if (x_l != y_l)
- {
- bitmap_ior_into (x_l->statics_read,
- y_l->statics_read);
- bitmap_ior_into (x_l->statics_written,
- y_l->statics_written);
- }
- x_l->calls_read_all |= y_l->calls_read_all;
- x_l->calls_write_all |= y_l->calls_write_all;
- merge_callee_local_info (target, y);
- }
- else
- {
- fprintf(stderr, "suspect inlining of ");
- dump_cgraph_node (stderr, orig_y);
- fprintf(stderr, "\ninto ");
- dump_cgraph_node (stderr, target);
- dump_cgraph (stderr);
- gcc_assert(false);
- }
- }
- }
-
- node_info->aux = NULL;
-}
+ init_p = true;
-/* The init routine for analyzing global static variable usage. See
- comments at top for description. */
-static void
-ipa_init (void)
-{
memory_identifier_string = build_string(7, "memory");
reference_vars_to_consider =
since all we would be interested in are the addressof
operations. */
visited_nodes = pointer_set_create ();
+
+ function_insertion_hook_holder =
+ cgraph_add_function_insertion_hook (&add_new_function, NULL);
+ node_removal_hook_holder =
+ cgraph_add_node_removal_hook (&remove_node_data, NULL);
+ node_duplication_hook_holder =
+ cgraph_add_node_duplication_hook (&duplicate_node_data, NULL);
}
/* Check out the rhs of a static or global initialization VNODE to see
&wi, wi.pset);
}
+
/* Set up the persistent info for FN. */
static ipa_reference_local_vars_info_t
= XCNEW (struct ipa_reference_vars_info_d);
ipa_reference_local_vars_info_t l
= XCNEW (struct ipa_reference_local_vars_info_d);
- tree decl = fn->decl;
/* Add the info to the tree's annotation. */
- get_function_ann (decl)->reference_vars_info = info;
+ set_reference_vars_info (fn, info);
info->local = l;
l->statics_read = BITMAP_ALLOC (&local_info_obstack);
return l;
}
+
/* This is the main routine for finding the reference patterns for
global variables within a function FN. */
-
+
static void
analyze_function (struct cgraph_node *fn)
{
current_function_decl = NULL;
}
-/* If FN is avail == AVAIL_OVERWRITABLE, replace the effects bit
- vectors with worst case bit vectors. We had to analyze it above to
- find out if it took the address of any statics. However, now that
- we know that, we can get rid of all of the other side effects. */
-
+/* Remove local data associated with function FN. */
static void
-clean_function (struct cgraph_node *fn)
+clean_function_local_data (struct cgraph_node *fn)
{
- ipa_reference_vars_info_t info = get_reference_vars_info_from_cgraph (fn);
+ ipa_reference_vars_info_t info = get_reference_vars_info (fn);
ipa_reference_local_vars_info_t l = info->local;
- ipa_reference_global_vars_info_t g = info->global;
-
if (l)
{
if (l->statics_read
&&l->statics_written != all_module_statics)
BITMAP_FREE (l->statics_written);
free (l);
+ info->local = NULL;
}
+}
+
+/* Remove all data associated with function FN. */
+
+static void
+clean_function (struct cgraph_node *fn)
+{
+ ipa_reference_vars_info_t info = get_reference_vars_info (fn);
+ ipa_reference_global_vars_info_t g = info->global;
+ clean_function_local_data (fn);
if (g)
{
if (g->statics_read
&& g->statics_not_written != all_module_statics)
BITMAP_FREE (g->statics_not_written);
free (g);
+ info->global = NULL;
}
- free (get_function_ann (fn->decl)->reference_vars_info);
- get_function_ann (fn->decl)->reference_vars_info = NULL;
+ free (get_reference_vars_info (fn));
+ set_reference_vars_info (fn, NULL);
}
/* Called when new function is inserted to callgraph late. */
visited_nodes = NULL;
}
+static bitmap
+copy_local_bitmap (bitmap src)
+{
+ bitmap dst;
+ if (!src)
+ return NULL;
+ if (src == all_module_statics)
+ return all_module_statics;
+ dst = BITMAP_ALLOC (&local_info_obstack);
+ bitmap_copy (dst, src);
+ return dst;
+}
+
+static bitmap
+copy_global_bitmap (bitmap src)
+{
+ bitmap dst;
+ if (!src)
+ return NULL;
+ if (src == all_module_statics)
+ return all_module_statics;
+ dst = BITMAP_ALLOC (&global_info_obstack);
+ bitmap_copy (dst, src);
+ return dst;
+}
+
+/* Called when new clone is inserted to callgraph late. */
+
+static void
+duplicate_node_data (struct cgraph_node *src, struct cgraph_node *dst,
+ void *data ATTRIBUTE_UNUSED)
+{
+ ipa_reference_global_vars_info_t ginfo;
+ ipa_reference_local_vars_info_t linfo;
+ ipa_reference_global_vars_info_t dst_ginfo;
+ ipa_reference_local_vars_info_t dst_linfo;
+
+ ginfo = get_global_reference_vars_info (src);
+ linfo = get_local_reference_vars_info (src);
+ if (!linfo && !ginfo)
+ return;
+ init_function_info (dst);
+ if (linfo)
+ {
+ dst_linfo = get_local_reference_vars_info (dst);
+ dst_linfo->statics_read = copy_local_bitmap (linfo->statics_read);
+ dst_linfo->statics_written = copy_local_bitmap (linfo->statics_written);
+ dst_linfo->calls_read_all = linfo->calls_read_all;
+ dst_linfo->calls_write_all = linfo->calls_write_all;
+ }
+ if (ginfo)
+ {
+ get_reference_vars_info (dst)->global = XCNEW (struct ipa_reference_global_vars_info_d);
+ dst_ginfo = get_global_reference_vars_info (dst);
+ dst_ginfo->statics_read = copy_global_bitmap (ginfo->statics_read);
+ dst_ginfo->statics_written = copy_global_bitmap (ginfo->statics_written);
+ dst_ginfo->statics_not_read = copy_global_bitmap (ginfo->statics_not_read);
+ dst_ginfo->statics_not_written = copy_global_bitmap (ginfo->statics_not_written);
+ }
+}
+
+/* Called when node is removed. */
+
+static void
+remove_node_data (struct cgraph_node *node, void *data ATTRIBUTE_UNUSED)
+{
+ if (get_reference_vars_info (node))
+ clean_function (node);
+}
+
/* Analyze each function in the cgraph to see which global or statics
are read or written. */
bitmap module_statics_readonly;
bitmap bm_temp;
- function_insertion_hook_holder =
- cgraph_add_function_insertion_hook (&add_new_function, NULL);
ipa_init ();
module_statics_readonly = BITMAP_ALLOC (&local_info_obstack);
bm_temp = BITMAP_ALLOC (&local_info_obstack);
replaced with worst case info.
*/
for (node = cgraph_nodes; node; node = node->next)
- if (node->analyzed
- && (cgraph_is_master_clone (node)
- || (cgraph_function_body_availability (node)
- == AVAIL_OVERWRITABLE)))
+ if (cgraph_function_body_availability (node) >= AVAIL_OVERWRITABLE)
analyze_function (node);
pointer_set_destroy (visited_nodes);
}
for (node = cgraph_nodes; node; node = node->next)
- if (node->analyzed
- && (cgraph_is_master_clone (node)
- || (cgraph_function_body_availability (node)
- == AVAIL_OVERWRITABLE)))
+ if (cgraph_function_body_availability (node) >= AVAIL_OVERWRITABLE)
{
ipa_reference_local_vars_info_t l;
- l = get_reference_vars_info_from_cgraph (node)->local;
+ l = get_reference_vars_info (node)->local;
/* Any variables that are not in all_module_statics are
removed from the local maps. This will include all of the
if (dump_file)
for (node = cgraph_nodes; node; node = node->next)
- if (node->analyzed
- && (cgraph_is_master_clone (node)
- || (cgraph_function_body_availability (node)
- == AVAIL_OVERWRITABLE)))
+ if (cgraph_function_body_availability (node) >= AVAIL_OVERWRITABLE)
{
ipa_reference_local_vars_info_t l;
unsigned int index;
bitmap_iterator bi;
- l = get_reference_vars_info_from_cgraph (node)->local;
+ l = get_reference_vars_info (node)->local;
fprintf (dump_file,
"\nFunction name:%s/%i:",
cgraph_node_name (node), node->uid);
fprintf(dump_file, "%s ",
get_static_name (index));
}
+ if (l->calls_read_all)
+ fprintf (dump_file, "\n calls read all: ");
+ if (l->calls_write_all)
+ fprintf (dump_file, "\n calls read all: ");
+ }
+}
+
+
+/* Return true if we need to write summary of NODE. */
+
+static bool
+write_node_summary_p (struct cgraph_node *node)
+{
+ return (node->analyzed
+ && node->global.inlined_to == NULL
+ && cgraph_function_body_availability (node) == AVAIL_OVERWRITABLE
+ && get_reference_vars_info (node) != NULL);
+}
+
+/* Serialize the ipa info for lto. */
+
+static void
+ipa_reference_write_summary (cgraph_node_set set)
+{
+ struct cgraph_node *node;
+ struct lto_simple_output_block *ob
+ = lto_create_simple_output_block (LTO_section_ipa_reference);
+ unsigned int count = 0;
+ cgraph_node_set_iterator csi;
+
+ for (csi = csi_start (set); !csi_end_p (csi); csi_next (&csi))
+ if (write_node_summary_p (csi_node (csi)))
+ count++;
+
+ lto_output_uleb128_stream (ob->main_stream, count);
+
+ /* Process all of the functions. */
+ for (csi = csi_start (set); !csi_end_p (csi); csi_next (&csi))
+ {
+ node = csi_node (csi);
+ if (write_node_summary_p (node))
+ {
+ ipa_reference_local_vars_info_t l
+ = get_reference_vars_info (node)->local;
+ unsigned int index;
+ bitmap_iterator bi;
+ lto_cgraph_encoder_t encoder;
+ int node_ref;
+
+ encoder = ob->decl_state->cgraph_node_encoder;
+ node_ref = lto_cgraph_encoder_encode (encoder, node);
+ lto_output_uleb128_stream (ob->main_stream, node_ref);
+
+ /* Stream out the statics read. */
+ lto_output_uleb128_stream (ob->main_stream,
+ bitmap_count_bits (l->statics_read));
+ EXECUTE_IF_SET_IN_BITMAP (l->statics_read, 0, index, bi)
+ lto_output_var_decl_index(ob->decl_state, ob->main_stream,
+ get_static_decl (index));
+
+ /* Stream out the statics written. */
+ lto_output_uleb128_stream (ob->main_stream,
+ bitmap_count_bits (l->statics_written));
+ EXECUTE_IF_SET_IN_BITMAP (l->statics_written, 0, index, bi)
+ lto_output_var_decl_index(ob->decl_state, ob->main_stream,
+ get_static_decl (index));
+ }
+ }
+ lto_destroy_simple_output_block (ob);
+}
+
+
+/* Deserialize the ipa info for lto. */
+
+static void
+ipa_reference_read_summary (void)
+{
+ struct lto_file_decl_data ** file_data_vec
+ = lto_get_file_decl_data ();
+ struct lto_file_decl_data * file_data;
+ unsigned int j = 0;
+
+ ipa_init ();
+
+ while ((file_data = file_data_vec[j++]))
+ {
+ const char *data;
+ size_t len;
+ struct lto_input_block *ib
+ = lto_create_simple_input_block (file_data,
+ LTO_section_ipa_reference,
+ &data, &len);
+ if (ib)
+ {
+ unsigned int i;
+ unsigned int f_count = lto_input_uleb128 (ib);
+
+ for (i = 0; i < f_count; i++)
+ {
+ unsigned int j, index;
+ struct cgraph_node *node;
+ ipa_reference_local_vars_info_t l;
+ unsigned int v_count;
+ lto_cgraph_encoder_t encoder;
+
+ index = lto_input_uleb128 (ib);
+ encoder = file_data->cgraph_node_encoder;
+ node = lto_cgraph_encoder_deref (encoder, index);
+ l = init_function_info (node);
+
+ /* Set the statics read. */
+ v_count = lto_input_uleb128 (ib);
+ for (j = 0; j < v_count; j++)
+ {
+ unsigned int var_index = lto_input_uleb128 (ib);
+ tree v_decl = lto_file_decl_data_get_var_decl (file_data,
+ var_index);
+ add_static_var (v_decl);
+ bitmap_set_bit (l->statics_read, DECL_UID (v_decl));
+ }
+
+ /* Set the statics written. */
+ v_count = lto_input_uleb128 (ib);
+ for (j = 0; j < v_count; j++)
+ {
+ unsigned int var_index = lto_input_uleb128 (ib);
+ tree v_decl = lto_file_decl_data_get_var_decl (file_data,
+ var_index);
+ add_static_var (v_decl);
+ bitmap_set_bit (l->statics_written, DECL_UID (v_decl));
+ }
+ }
+
+ lto_destroy_simple_input_block (file_data,
+ LTO_section_ipa_reference,
+ ib, data, len);
}
+ }
}
+
+
\f
/* Produce the global information by preforming a transitive closure
on the local information that was produced by ipa_analyze_function
struct cgraph_node *w;
struct cgraph_node **order =
XCNEWVEC (struct cgraph_node *, cgraph_n_nodes);
- int order_pos = ipa_utils_reduced_inorder (order, false, true);
+ int order_pos = ipa_utils_reduced_inorder (order, false, true, NULL);
int i;
cgraph_remove_function_insertion_hook (function_insertion_hook_holder);
the global information. All the nodes within a cycle will have
the same info so we collapse cycles first. Then we can do the
propagation in one pass from the leaves to the roots. */
- order_pos = ipa_utils_reduced_inorder (order, true, true);
+ order_pos = ipa_utils_reduced_inorder (order, true, true, NULL);
if (dump_file)
ipa_utils_print_order(dump_file, "reduced", order, order_pos);
struct ipa_dfs_info * w_info;
node = order[i];
- node_info = get_reference_vars_info_from_cgraph (node);
+ node_info = get_reference_vars_info (node);
if (!node_info)
{
dump_cgraph_node (stderr, node);
gcc_unreachable ();
}
- node_info->global = node_g;
+ gcc_assert (!node_info->global);
node_l = node_info->local;
read_all = node_l->calls_read_all;
while (w)
{
ipa_reference_local_vars_info_t w_l =
- get_reference_vars_info_from_cgraph (w)->local;
+ get_reference_vars_info (w)->local;
read_all |= w_l->calls_read_all;
write_all |= w_l->calls_write_all;
node_l->statics_written);
}
+ propagate_bits (node_g, node);
w_info = (struct ipa_dfs_info *) node->aux;
w = w_info->next_cycle;
while (w)
{
ipa_reference_vars_info_t w_ri =
- get_reference_vars_info_from_cgraph (w);
+ get_reference_vars_info (w);
ipa_reference_local_vars_info_t w_l = w_ri->local;
-
- /* All nodes within a cycle share the same global info bitmaps. */
- w_ri->global = node_g;
/* These global bitmaps are initialized from the local info
of all of the nodes in the region. However there is no
if (!write_all)
bitmap_ior_into (node_g->statics_written,
w_l->statics_written);
+ propagate_bits (node_g, w);
w_info = (struct ipa_dfs_info *) w->aux;
w = w_info->next_cycle;
}
- w = node;
- while (w)
- {
- propagate_bits (w);
- w_info = (struct ipa_dfs_info *) w->aux;
- w = w_info->next_cycle;
- }
- }
-
- /* Need to fix up the local information sets. The information that
- has been gathered so far is preinlining. However, the
- compilation will progress post inlining so the local sets for the
- inlined calls need to be merged into the callers. Note that the
- local sets are not shared between all of the nodes in a cycle so
- those nodes in the cycle must be processed explicitly. */
- for (i = 0; i < order_pos; i++ )
- {
- struct ipa_dfs_info * w_info;
- node = order[i];
- merge_callee_local_info (node, node);
-
+ /* All nodes within a cycle have the same global info bitmaps. */
+ node_info->global = node_g;
w_info = (struct ipa_dfs_info *) node->aux;
w = w_info->next_cycle;
while (w)
{
- merge_callee_local_info (w, w);
+ ipa_reference_vars_info_t w_ri =
+ get_reference_vars_info (w);
+
+ gcc_assert (!w_ri->global);
+ w_ri->global = XCNEW (struct ipa_reference_global_vars_info_d);
+ w_ri->global->statics_read = copy_global_bitmap (node_g->statics_read);
+ w_ri->global->statics_written = copy_global_bitmap (node_g->statics_written);
+
w_info = (struct ipa_dfs_info *) w->aux;
w = w_info->next_cycle;
}
struct ipa_dfs_info * w_info;
node = order[i];
- node_info = get_reference_vars_info_from_cgraph (node);
+ node_info = get_reference_vars_info (node);
node_g = node_info->global;
node_l = node_info->local;
fprintf (dump_file,
while (w)
{
ipa_reference_vars_info_t w_ri =
- get_reference_vars_info_from_cgraph (w);
+ get_reference_vars_info (w);
ipa_reference_local_vars_info_t w_l = w_ri->local;
fprintf (dump_file, "\n next cycle: %s/%i ",
cgraph_node_name (w), w->uid);
ipa_reference_vars_info_t node_info;
ipa_reference_global_vars_info_t node_g;
node = order[i];
- node_info = get_reference_vars_info_from_cgraph (node);
+ node_info = get_reference_vars_info (node);
node_g = node_info->global;
/* Create the complimentary sets. These are more useful for
node_g->statics_not_written = BITMAP_ALLOC (&global_info_obstack);
if (node_g->statics_read != all_module_statics)
- {
- bitmap_and_compl (node_g->statics_not_read,
- all_module_statics,
- node_g->statics_read);
- }
+ bitmap_and_compl (node_g->statics_not_read,
+ all_module_statics,
+ node_g->statics_read);
if (node_g->statics_written
!= all_module_statics)
for (node = cgraph_nodes; node; node = node->next)
{
ipa_reference_vars_info_t node_info;
- node_info = get_reference_vars_info_from_cgraph (node);
+ node_info = get_reference_vars_info (node);
/* Get rid of the aux information. */
if (node->aux)
node->aux = NULL;
}
- if (node->analyzed
- && (cgraph_function_body_availability (node) == AVAIL_OVERWRITABLE))
+ if (cgraph_function_body_availability (node) == AVAIL_OVERWRITABLE)
clean_function (node);
else if (node_info)
- {
- /* Remove local info we no longer need. */
- if (node_info->local->statics_read
- && node_info->local->statics_read != all_module_statics)
- BITMAP_FREE (node_info->local->statics_read);
- if (node_info->local->statics_written
- && node_info->local->statics_written != all_module_statics)
- BITMAP_FREE (node_info->local->statics_written);
- }
+ clean_function_local_data (node);
}
bitmap_obstack_release (&local_info_obstack);
return 0;
&& !(errorcount || sorrycount));
}
-struct ipa_opt_pass pass_ipa_reference =
+struct ipa_opt_pass_d pass_ipa_reference =
{
{
IPA_PASS,
0 /* todo_flags_finish */
},
generate_summary, /* generate_summary */
- NULL, /* write_summary */
- NULL, /* read_summary */
+ ipa_reference_write_summary, /* write_summary */
+ ipa_reference_read_summary, /* read_summary */
NULL, /* function_read_summary */
0, /* TODOs */
NULL, /* function_transform */
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