/* Tree inlining.
- Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
Contributed by Alexandre Oliva <aoliva@redhat.com>
#include "tree-mudflap.h"
#include "tree-flow.h"
#include "function.h"
-#include "ggc.h"
#include "tree-flow.h"
#include "diagnostic.h"
#include "except.h"
MODIFY_EXPRs that store to a dedicated returned-value variable.
The duplicated eh_region info of the copy will later be appended
to the info for the caller; the eh_region info in copied throwing
- statements and RESX_EXPRs is adjusted accordingly.
+ statements and RESX statements are adjusted accordingly.
Cloning: (only in C++) We have one body for a con/de/structor, and
multiple function decls, each with a unique parameter list.
/* Prototypes. */
-static tree declare_return_variable (copy_body_data *, tree, tree, tree *);
+static tree declare_return_variable (copy_body_data *, tree, tree);
static void remap_block (tree *, copy_body_data *);
static void copy_bind_expr (tree *, int *, copy_body_data *);
static tree mark_local_for_remap_r (tree *, int *, void *);
*pointer_map_insert (id->debug_map, key) = value;
}
+/* If nonzero, we're remapping the contents of inlined debug
+ statements. If negative, an error has occurred, such as a
+ reference to a variable that isn't available in the inlined
+ context. */
+static int processing_debug_stmt = 0;
+
/* Construct new SSA name for old NAME. ID is the inline context. */
static tree
if (n)
return unshare_expr (*n);
+ if (processing_debug_stmt)
+ {
+ processing_debug_stmt = -1;
+ return name;
+ }
+
/* Do not set DEF_STMT yet as statement is not copied yet. We do that
in copy_bb. */
new_tree = remap_decl (SSA_NAME_VAR (name), id);
/* We might've substituted constant or another SSA_NAME for
- the variable.
+ the variable.
Replace the SSA name representing RESULT_DECL by variable during
inlining: this saves us from need to introduce PHI node in a case
&& (TREE_CODE (SSA_NAME_VAR (name)) != RESULT_DECL
|| !id->transform_return_to_modify))
{
+ struct ptr_info_def *pi;
new_tree = make_ssa_name (new_tree, NULL);
insert_decl_map (id, name, new_tree);
SSA_NAME_OCCURS_IN_ABNORMAL_PHI (new_tree)
= SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name);
TREE_TYPE (new_tree) = TREE_TYPE (SSA_NAME_VAR (new_tree));
+ /* At least IPA points-to info can be directly transferred. */
+ if (id->src_cfun->gimple_df
+ && id->src_cfun->gimple_df->ipa_pta
+ && (pi = SSA_NAME_PTR_INFO (name))
+ && !pi->pt.anything)
+ {
+ struct ptr_info_def *new_pi = get_ptr_info (new_tree);
+ new_pi->pt = pi->pt;
+ }
if (gimple_nop_p (SSA_NAME_DEF_STMT (name)))
{
/* By inlining function having uninitialized variable, we might
{
gimple_stmt_iterator gsi = gsi_last_bb (id->entry_bb);
gimple init_stmt;
-
+
init_stmt = gimple_build_assign (new_tree,
fold_convert (TREE_TYPE (new_tree),
integer_zero_node));
return new_tree;
}
-/* If nonzero, we're remapping the contents of inlined debug
- statements. If negative, an error has occurred, such as a
- reference to a variable that isn't available in the inlined
- context. */
-int processing_debug_stmt = 0;
-
/* Remap DECL during the copying of the BLOCK tree for the function. */
tree
remap_decl (tree decl, copy_body_data *id)
{
tree *n;
- tree fn;
/* We only remap local variables in the current function. */
- fn = id->src_fn;
/* See if we have remapped this declaration. */
{
/* Make a copy of the variable or label. */
tree t = id->copy_decl (decl, id);
-
+
/* Remember it, so that if we encounter this local entity again
we can reuse this copy. Do this early because remap_type may
need this decl for TYPE_STUB_DECL. */
&& (TREE_CODE (t) == VAR_DECL
|| TREE_CODE (t) == RESULT_DECL || TREE_CODE (t) == PARM_DECL))
{
- tree def = gimple_default_def (id->src_cfun, decl);
get_var_ann (t);
- if (TREE_CODE (decl) != PARM_DECL && def)
- {
- tree map = remap_ssa_name (def, id);
- /* Watch out RESULT_DECLs whose SSA names map directly
- to them. */
- if (TREE_CODE (map) == SSA_NAME
- && gimple_nop_p (SSA_NAME_DEF_STMT (map)))
- set_default_def (t, map);
- }
add_referenced_var (t);
}
return t;
new_tree = build_pointer_type_for_mode (remap_type (TREE_TYPE (type), id),
TYPE_MODE (type),
TYPE_REF_CAN_ALIAS_ALL (type));
+ if (TYPE_ATTRIBUTES (type) || TYPE_QUALS (type))
+ new_tree = build_type_attribute_qual_variant (new_tree,
+ TYPE_ATTRIBUTES (type),
+ TYPE_QUALS (type));
insert_decl_map (id, type, new_tree);
return new_tree;
}
new_tree = build_reference_type_for_mode (remap_type (TREE_TYPE (type), id),
TYPE_MODE (type),
TYPE_REF_CAN_ALIAS_ALL (type));
+ if (TYPE_ATTRIBUTES (type) || TYPE_QUALS (type))
+ new_tree = build_type_attribute_qual_variant (new_tree,
+ TYPE_ATTRIBUTES (type),
+ TYPE_QUALS (type));
insert_decl_map (id, type, new_tree);
return new_tree;
}
/* The type only needs remapping if it's variably modified. */
/* Decide if DECL can be put into BLOCK_NONLOCAL_VARs. */
-
+
static bool
can_be_nonlocal (tree decl, copy_body_data *id)
{
for (old_var = decls; old_var; old_var = TREE_CHAIN (old_var))
{
tree new_var;
- tree origin_var = DECL_ORIGIN (old_var);
if (can_be_nonlocal (old_var, id))
{
if (TREE_CODE (old_var) == VAR_DECL
+ && ! DECL_EXTERNAL (old_var)
&& (var_ann (old_var) || !gimple_in_ssa_p (cfun)))
cfun->local_decls = tree_cons (NULL_TREE, old_var,
cfun->local_decls);
if ((!optimize || debug_info_level > DINFO_LEVEL_TERSE)
&& !DECL_IGNORED_P (old_var)
&& nonlocalized_list)
- VEC_safe_push (tree, gc, *nonlocalized_list, origin_var);
+ VEC_safe_push (tree, gc, *nonlocalized_list, old_var);
continue;
}
/* If we didn't remap this variable, we can't mess with its
TREE_CHAIN. If we remapped this variable to the return slot, it's
already declared somewhere else, so don't declare it here. */
-
+
if (new_var == id->retvar)
;
else if (!new_var)
if ((!optimize || debug_info_level > DINFO_LEVEL_TERSE)
&& !DECL_IGNORED_P (old_var)
&& nonlocalized_list)
- VEC_safe_push (tree, gc, *nonlocalized_list, origin_var);
+ VEC_safe_push (tree, gc, *nonlocalized_list, old_var);
}
else
{
{
tree old_block;
tree new_block;
- tree fn;
/* Make the new block. */
old_block = *block;
&BLOCK_NONLOCALIZED_VARS (new_block),
id);
- fn = id->dst_fn;
-
if (id->transform_lang_insert_block)
id->transform_lang_insert_block (new_block);
&& id->remapping_type_depth == 0
&& !processing_debug_stmt)
add_referenced_var (*tp);
-
+
/* If EXPR has block defined, map it to newly constructed block.
When inlining we want EXPRs without block appear in the block
- of function call. */
+ of function call if we are not remapping a type. */
if (EXPR_P (*tp))
{
- new_block = id->block;
+ new_block = id->remapping_type_depth == 0 ? id->block : NULL;
if (TREE_BLOCK (*tp))
{
tree *n;
TREE_BLOCK (*tp) = new_block;
}
- if (TREE_CODE (*tp) == RESX_EXPR && id->eh_region_offset)
- TREE_OPERAND (*tp, 0) =
- build_int_cst (NULL_TREE,
- id->eh_region_offset
- + TREE_INT_CST_LOW (TREE_OPERAND (*tp, 0)));
-
if (TREE_CODE (*tp) != OMP_CLAUSE)
TREE_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id);
return NULL_TREE;
}
+/* Helper for remap_gimple_stmt. Given an EH region number for the
+ source function, map that to the duplicate EH region number in
+ the destination function. */
+
+static int
+remap_eh_region_nr (int old_nr, copy_body_data *id)
+{
+ eh_region old_r, new_r;
+ void **slot;
+
+ old_r = get_eh_region_from_number_fn (id->src_cfun, old_nr);
+ slot = pointer_map_contains (id->eh_map, old_r);
+ new_r = (eh_region) *slot;
+
+ return new_r->index;
+}
+
+/* Similar, but operate on INTEGER_CSTs. */
+
+static tree
+remap_eh_region_tree_nr (tree old_t_nr, copy_body_data *id)
+{
+ int old_nr, new_nr;
+
+ old_nr = tree_low_cst (old_t_nr, 0);
+ new_nr = remap_eh_region_nr (old_nr, id);
+
+ return build_int_cst (NULL, new_nr);
+}
/* Helper for copy_bb. Remap statement STMT using the inlining
information in ID. Return the new statement copy. */
case GIMPLE_TRY:
s1 = remap_gimple_seq (gimple_try_eval (stmt), id);
s2 = remap_gimple_seq (gimple_try_cleanup (stmt), id);
- copy = gimple_build_try (s1, s2, gimple_try_kind (stmt));
+ copy = gimple_build_try (s1, s2, gimple_try_kind (stmt));
break;
case GIMPLE_WITH_CLEANUP_EXPR:
VEC_safe_push (gimple, heap, id->debug_stmts, copy);
return copy;
}
- else
- /* Create a new deep copy of the statement. */
- copy = gimple_copy (stmt);
+
+ /* Create a new deep copy of the statement. */
+ copy = gimple_copy (stmt);
+
+ /* Remap the region numbers for __builtin_eh_{pointer,filter},
+ RESX and EH_DISPATCH. */
+ if (id->eh_map)
+ switch (gimple_code (copy))
+ {
+ case GIMPLE_CALL:
+ {
+ tree r, fndecl = gimple_call_fndecl (copy);
+ if (fndecl && DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL)
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ case BUILT_IN_EH_COPY_VALUES:
+ r = gimple_call_arg (copy, 1);
+ r = remap_eh_region_tree_nr (r, id);
+ gimple_call_set_arg (copy, 1, r);
+ /* FALLTHRU */
+
+ case BUILT_IN_EH_POINTER:
+ case BUILT_IN_EH_FILTER:
+ r = gimple_call_arg (copy, 0);
+ r = remap_eh_region_tree_nr (r, id);
+ gimple_call_set_arg (copy, 0, r);
+ break;
+
+ default:
+ break;
+ }
+
+ /* Reset alias info if we didn't apply measures to
+ keep it valid over inlining by setting DECL_PT_UID. */
+ if (!id->src_cfun->gimple_df
+ || !id->src_cfun->gimple_df->ipa_pta)
+ gimple_call_reset_alias_info (copy);
+ }
+ break;
+
+ case GIMPLE_RESX:
+ {
+ int r = gimple_resx_region (copy);
+ r = remap_eh_region_nr (r, id);
+ gimple_resx_set_region (copy, r);
+ }
+ break;
+
+ case GIMPLE_EH_DISPATCH:
+ {
+ int r = gimple_eh_dispatch_region (copy);
+ r = remap_eh_region_nr (r, id);
+ gimple_eh_dispatch_set_region (copy, r);
+ }
+ break;
+
+ default:
+ break;
+ }
}
/* If STMT has a block defined, map it to the newly constructed
if (skip_first)
walk_tree (gimple_op_ptr (copy, 1), remap_gimple_op_r, &wi, NULL);
else
- walk_gimple_op (copy, remap_gimple_op_r, &wi);
+ walk_gimple_op (copy, remap_gimple_op_r, &wi);
/* Clear the copied virtual operands. We are not remapping them here
but are going to recreate them from scratch. */
gimple_set_vuse (copy, NULL_TREE);
}
- /* We have to handle EH region remapping of GIMPLE_RESX specially because
- the region number is not an operand. */
- if (gimple_code (stmt) == GIMPLE_RESX && id->eh_region_offset)
- {
- gimple_resx_set_region (copy, gimple_resx_region (stmt) + id->eh_region_offset);
- }
return copy;
}
gimple_stmt_iterator gsi, copy_gsi, seq_gsi;
basic_block copy_basic_block;
tree decl;
+ gcov_type freq;
/* create_basic_block() will append every new block to
basic_block_info automatically. */
/* We are going to rebuild frequencies from scratch. These values
have just small importance to drive canonicalize_loop_headers. */
- copy_basic_block->frequency = ((gcov_type)bb->frequency
- * frequency_scale / REG_BR_PROB_BASE);
+ freq = ((gcov_type)bb->frequency * frequency_scale / REG_BR_PROB_BASE);
- if (copy_basic_block->frequency > BB_FREQ_MAX)
- copy_basic_block->frequency = BB_FREQ_MAX;
+ /* We recompute frequencies after inlining, so this is quite safe. */
+ if (freq > BB_FREQ_MAX)
+ freq = BB_FREQ_MAX;
+ copy_basic_block->frequency = freq;
copy_gsi = gsi_start_bb (copy_basic_block);
case CB_CGE_DUPLICATE:
edge = cgraph_edge (id->src_node, orig_stmt);
if (edge)
- edge = cgraph_clone_edge (edge, id->dst_node, stmt,
- REG_BR_PROB_BASE, 1,
- edge->frequency, true);
+ {
+ int edge_freq = edge->frequency;
+ edge = cgraph_clone_edge (edge, id->dst_node, stmt,
+ gimple_uid (stmt),
+ REG_BR_PROB_BASE, CGRAPH_FREQ_BASE,
+ edge->frequency, true);
+ /* We could also just rescale the frequency, but
+ doing so would introduce roundoff errors and make
+ verifier unhappy. */
+ edge->frequency
+ = compute_call_stmt_bb_frequency (id->dst_node->decl,
+ copy_basic_block);
+ if (dump_file
+ && profile_status_for_function (cfun) != PROFILE_ABSENT
+ && (edge_freq > edge->frequency + 10
+ || edge_freq < edge->frequency - 10))
+ {
+ fprintf (dump_file, "Edge frequency estimated by "
+ "cgraph %i diverge from inliner's estimate %i\n",
+ edge_freq,
+ edge->frequency);
+ fprintf (dump_file,
+ "Orig bb: %i, orig bb freq %i, new bb freq %i\n",
+ bb->index,
+ bb->frequency,
+ copy_basic_block->frequency);
+ }
+ stmt = cgraph_redirect_edge_call_stmt_to_callee (edge);
+ }
break;
case CB_CGE_MOVE_CLONES:
/* Constant propagation on argument done during inlining
may create new direct call. Produce an edge for it. */
- if ((!edge
+ if ((!edge
|| (edge->indirect_call
&& id->transform_call_graph_edges == CB_CGE_MOVE_CLONES))
&& is_gimple_call (stmt)
/* We have missing edge in the callgraph. This can happen
when previous inlining turned an indirect call into a
- direct call by constant propagating arguments. In all
+ direct call by constant propagating arguments or we are
+ producing dead clone (for further clonning). In all
other cases we hit a bug (incorrect node sharing is the
most common reason for missing edges). */
- gcc_assert (dest->needed || !dest->analyzed);
+ gcc_assert (dest->needed || !dest->analyzed
+ || !id->src_node->analyzed);
if (id->transform_call_graph_edges == CB_CGE_MOVE_CLONES)
cgraph_create_edge_including_clones
- (id->dst_node, dest, stmt, bb->count,
- compute_call_stmt_bb_frequency (id->dst_node->decl, bb),
+ (id->dst_node, dest, orig_stmt, stmt, bb->count,
+ compute_call_stmt_bb_frequency (id->dst_node->decl,
+ copy_basic_block),
bb->loop_depth, CIF_ORIGINALLY_INDIRECT_CALL);
else
cgraph_create_edge (id->dst_node, dest, stmt,
- bb->count, CGRAPH_FREQ_BASE,
+ bb->count,
+ compute_call_stmt_bb_frequency
+ (id->dst_node->decl, copy_basic_block),
bb->loop_depth)->inline_failed
= CIF_ORIGINALLY_INDIRECT_CALL;
if (dump_file)
cfun->calls_setjmp = true;
}
- /* If you think we can abort here, you are wrong.
- There is no region 0 in gimple. */
- gcc_assert (lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) != 0);
-
- if (stmt_could_throw_p (stmt)
- /* When we are cloning for inlining, we are supposed to
- construct a clone that calls precisely the same functions
- as original. However IPA optimizers might've proved
- earlier some function calls as non-trapping that might
- render some basic blocks dead that might become
- unreachable.
-
- We can't update SSA with unreachable blocks in CFG and thus
- we prevent the scenario by preserving even the "dead" eh
- edges until the point they are later removed by
- fixup_cfg pass. */
- || (id->transform_call_graph_edges == CB_CGE_MOVE_CLONES
- && lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) > 0))
- {
- int region = lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt);
-
- /* Add an entry for the copied tree in the EH hashtable.
- When cloning or versioning, use the hashtable in
- cfun, and just copy the EH number. When inlining, use the
- hashtable in the caller, and adjust the region number. */
- if (region > 0)
- add_stmt_to_eh_region (stmt, region + id->eh_region_offset);
-
- /* If this tree doesn't have a region associated with it,
- and there is a "current region,"
- then associate this tree with the current region
- and add edges associated with this region. */
- if (lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) <= 0
- && id->eh_region > 0
- && stmt_could_throw_p (stmt))
- add_stmt_to_eh_region (stmt, id->eh_region);
- }
+ maybe_duplicate_eh_stmt_fn (cfun, stmt, id->src_cfun, orig_stmt,
+ id->eh_map, id->eh_lp_nr);
if (gimple_in_ssa_p (cfun) && !is_gimple_debug (stmt))
{
}
}
- if (can_throw)
+ if (gimple_code (copy_stmt) == GIMPLE_EH_DISPATCH)
+ make_eh_dispatch_edges (copy_stmt);
+ else if (can_throw)
make_eh_edges (copy_stmt);
if (nonlocal_goto)
new_arg = force_gimple_operand (new_arg, &stmts, true, NULL);
gsi_insert_seq_on_edge_immediate (new_edge, stmts);
}
- add_phi_arg (new_phi, new_arg, new_edge,
+ add_phi_arg (new_phi, new_arg, new_edge,
gimple_phi_arg_location_from_edge (phi, old_edge));
}
}
NEW_FNDECL to be build. CALLEE_FNDECL is the original */
static void
-initialize_cfun (tree new_fndecl, tree callee_fndecl, gcov_type count,
- int frequency)
+initialize_cfun (tree new_fndecl, tree callee_fndecl, gcov_type count)
{
struct function *src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
- gcov_type count_scale, frequency_scale;
+ gcov_type count_scale;
if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count)
count_scale = (REG_BR_PROB_BASE * count
/ ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count);
else
- count_scale = 1;
-
- if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency)
- frequency_scale = (REG_BR_PROB_BASE * frequency
- /
- ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency);
- else
- frequency_scale = count_scale;
+ count_scale = REG_BR_PROB_BASE;
/* Register specific tree functions. */
gimple_register_cfg_hooks ();
cfun->function_end_locus = src_cfun->function_end_locus;
cfun->curr_properties = src_cfun->curr_properties;
cfun->last_verified = src_cfun->last_verified;
- if (src_cfun->ipa_transforms_to_apply)
- cfun->ipa_transforms_to_apply = VEC_copy (ipa_opt_pass, heap,
- src_cfun->ipa_transforms_to_apply);
cfun->va_list_gpr_size = src_cfun->va_list_gpr_size;
cfun->va_list_fpr_size = src_cfun->va_list_fpr_size;
- cfun->function_frequency = src_cfun->function_frequency;
cfun->has_nonlocal_label = src_cfun->has_nonlocal_label;
cfun->stdarg = src_cfun->stdarg;
cfun->dont_save_pending_sizes_p = src_cfun->dont_save_pending_sizes_p;
init_empty_tree_cfg ();
+ profile_status_for_function (cfun) = profile_status_for_function (src_cfun);
ENTRY_BLOCK_PTR->count =
(ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale /
REG_BR_PROB_BASE);
- ENTRY_BLOCK_PTR->frequency =
- (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency *
- frequency_scale / REG_BR_PROB_BASE);
+ ENTRY_BLOCK_PTR->frequency
+ = ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency;
EXIT_BLOCK_PTR->count =
(EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale /
REG_BR_PROB_BASE);
EXIT_BLOCK_PTR->frequency =
- (EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency *
- frequency_scale / REG_BR_PROB_BASE);
+ EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency;
if (src_cfun->eh)
init_eh_for_function ();
another function. Walks FN via CFG, returns new fndecl. */
static tree
-copy_cfg_body (copy_body_data * id, gcov_type count, int frequency,
+copy_cfg_body (copy_body_data * id, gcov_type count, int frequency_scale,
basic_block entry_block_map, basic_block exit_block_map)
{
tree callee_fndecl = id->src_fn;
struct function *cfun_to_copy;
basic_block bb;
tree new_fndecl = NULL;
- gcov_type count_scale, frequency_scale;
+ gcov_type count_scale;
int last;
if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count)
count_scale = (REG_BR_PROB_BASE * count
/ ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count);
else
- count_scale = 1;
-
- if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency)
- frequency_scale = (REG_BR_PROB_BASE * frequency
- /
- ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency);
- else
- frequency_scale = count_scale;
+ count_scale = REG_BR_PROB_BASE;
/* Register specific tree functions. */
gimple_register_cfg_hooks ();
/* Duplicate any exception-handling regions. */
if (cfun->eh)
- {
- id->eh_region_offset
- = duplicate_eh_regions (cfun_to_copy, remap_decl_1, id,
- 0, id->eh_region);
- }
+ id->eh_map = duplicate_eh_regions (cfun_to_copy, NULL, id->eh_lp_nr,
+ remap_decl_1, id);
/* Use aux pointers to map the original blocks to copy. */
FOR_EACH_BB_FN (bb, cfun_to_copy)
entry_block_map->aux = NULL;
exit_block_map->aux = NULL;
+ if (id->eh_map)
+ {
+ pointer_map_destroy (id->eh_map);
+ id->eh_map = NULL;
+ }
+
return new_fndecl;
}
gcc_assert (TREE_CODE (*n) == VAR_DECL);
t = *n;
}
+ else if (TREE_CODE (t) == VAR_DECL
+ && !TREE_STATIC (t)
+ && gimple_in_ssa_p (cfun)
+ && !pointer_map_contains (id->decl_map, t)
+ && !var_ann (t))
+ /* T is a non-localized variable. */;
else
walk_tree (&t, remap_gimple_op_r, &wi, NULL);
another function. */
static tree
-copy_body (copy_body_data *id, gcov_type count, int frequency,
+copy_body (copy_body_data *id, gcov_type count, int frequency_scale,
basic_block entry_block_map, basic_block exit_block_map)
{
tree fndecl = id->src_fn;
/* If this body has a CFG, walk CFG and copy. */
gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION (DECL_STRUCT_FUNCTION (fndecl)));
- body = copy_cfg_body (id, count, frequency, entry_block_map, exit_block_map);
+ body = copy_cfg_body (id, count, frequency_scale, entry_block_map, exit_block_map);
copy_debug_stmts (id);
return body;
is set only for CALL_EXPR_RETURN_SLOT_OPT. MODIFY_DEST, if non-null,
was the LHS of the MODIFY_EXPR to which this call is the RHS.
- The return value is a (possibly null) value that is the result of the
- function as seen by the callee. *USE_P is a (possibly null) value that
- holds the result as seen by the caller. */
+ The return value is a (possibly null) value that holds the result
+ as seen by the caller. */
static tree
-declare_return_variable (copy_body_data *id, tree return_slot, tree modify_dest,
- tree *use_p)
+declare_return_variable (copy_body_data *id, tree return_slot, tree modify_dest)
{
tree callee = id->src_fn;
tree caller = id->dst_fn;
tree result = DECL_RESULT (callee);
tree callee_type = TREE_TYPE (result);
- tree caller_type = TREE_TYPE (TREE_TYPE (callee));
+ tree caller_type;
tree var, use;
+ /* Handle type-mismatches in the function declaration return type
+ vs. the call expression. */
+ if (modify_dest)
+ caller_type = TREE_TYPE (modify_dest);
+ else
+ caller_type = TREE_TYPE (TREE_TYPE (callee));
+
/* We don't need to do anything for functions that don't return
anything. */
if (!result || VOID_TYPE_P (callee_type))
- {
- *use_p = NULL_TREE;
- return NULL_TREE;
- }
+ return NULL_TREE;
/* If there was a return slot, then the return value is the
dereferenced address of that object. */
STRIP_USELESS_TYPE_CONVERSION (return_slot_addr);
/* We are going to construct *&return_slot and we can't do that
- for variables believed to be not addressable.
+ for variables believed to be not addressable.
FIXME: This check possibly can match, because values returned
via return slot optimization are not believed to have address
use = var;
if (!useless_type_conversion_p (caller_type, TREE_TYPE (var)))
use = fold_convert (caller_type, var);
-
+
STRIP_USELESS_TYPE_CONVERSION (use);
if (DECL_BY_REFERENCE (result))
/* Remember this so we can ignore it in remap_decls. */
id->retvar = var;
- *use_p = use;
- return var;
+ return use;
}
/* Callback through walk_tree. Determine if a DECL_INITIAL makes reference
return NULL_TREE;
}
-/* Callback through walk_tree. Determine if we've got an aggregate
- type that we can't support; return non-null if so. */
-
-static tree
-cannot_copy_type_1 (tree *nodep, int *walk_subtrees ATTRIBUTE_UNUSED,
- void *data ATTRIBUTE_UNUSED)
-{
- tree t, node = *nodep;
-
- if (TREE_CODE (node) == RECORD_TYPE || TREE_CODE (node) == UNION_TYPE)
- {
- /* We cannot inline a function of the form
-
- void F (int i) { struct S { int ar[i]; } s; }
-
- Attempting to do so produces a catch-22.
- If walk_tree examines the TYPE_FIELDS chain of RECORD_TYPE/
- UNION_TYPE nodes, then it goes into infinite recursion on a
- structure containing a pointer to its own type. If it doesn't,
- then the type node for S doesn't get adjusted properly when
- F is inlined.
-
- ??? This is likely no longer true, but it's too late in the 4.0
- cycle to try to find out. This should be checked for 4.1. */
- for (t = TYPE_FIELDS (node); t; t = TREE_CHAIN (t))
- if (variably_modified_type_p (TREE_TYPE (t), NULL))
- return node;
- }
-
- return NULL_TREE;
-}
-
-
/* Determine if the function can be copied. If so return NULL. If
not return a string describng the reason for failure. */
"address of local label in a static variable");
goto fail;
}
-
- if (!TREE_STATIC (decl) && !DECL_EXTERNAL (decl)
- && variably_modified_type_p (TREE_TYPE (decl), NULL)
- && walk_tree_without_duplicates (&TREE_TYPE (decl),
- cannot_copy_type_1, NULL))
- {
- reason = G_("function %q+F can never be copied "
- "because it uses variable sized variables");
- goto fail;
- }
}
fail:
case MINUS_EXPR:
case MULT_EXPR:
+ case ADDR_SPACE_CONVERT_EXPR:
case FIXED_CONVERT_EXPR:
case FIX_TRUNC_EXPR:
lhs = gimple_assign_lhs (stmt);
rhs = gimple_assign_rhs1 (stmt);
- /* EH magic stuff is most probably going to be optimized out.
- We rarely really need to save EH info for unwinding
- nested exceptions. */
- if (TREE_CODE (lhs) == FILTER_EXPR
- || TREE_CODE (lhs) == EXC_PTR_EXPR
- || TREE_CODE (rhs) == FILTER_EXPR
- || TREE_CODE (rhs) == EXC_PTR_EXPR)
- return 0;
if (is_gimple_reg (lhs))
cost = 0;
else
case GIMPLE_SWITCH:
/* Take into account cost of the switch + guess 2 conditional jumps for
- each case label.
+ each case label.
TODO: once the switch expansion logic is sufficiently separated, we can
do better job on estimating cost of the switch. */
cost = weights->target_builtin_call_cost;
else
cost = weights->call_cost;
-
+
if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
switch (DECL_FUNCTION_CODE (decl))
{
cost = weights->target_builtin_call_cost;
break;
+ /* Exception state returns or moves registers around. */
+ case BUILT_IN_EH_FILTER:
+ case BUILT_IN_EH_POINTER:
+ case BUILT_IN_EH_COPY_VALUES:
+ return 0;
+
default:
break;
}
return 0;
case GIMPLE_ASM:
+ return asm_str_count (gimple_asm_string (stmt));
+
case GIMPLE_RESX:
- return 1;
+ /* This is either going to be an external function call with one
+ argument, or two register copy statements plus a goto. */
+ return 2;
+
+ case GIMPLE_EH_DISPATCH:
+ /* ??? This is going to turn into a switch statement. Ideally
+ we'd have a look at the eh region and estimate the number of
+ edges involved. */
+ return 10;
case GIMPLE_BIND:
return estimate_num_insns_seq (gimple_bind_body (stmt), weights);
static bool
expand_call_inline (basic_block bb, gimple stmt, copy_body_data *id)
{
- tree retvar, use_retvar;
+ tree use_retvar;
tree fn;
struct pointer_map_t *st, *dst;
tree return_slot;
cg_edge = cgraph_edge (id->dst_node, stmt);
+ /* Don't inline functions with different EH personalities. */
+ if (DECL_FUNCTION_PERSONALITY (cg_edge->caller->decl)
+ && DECL_FUNCTION_PERSONALITY (cg_edge->callee->decl)
+ && (DECL_FUNCTION_PERSONALITY (cg_edge->caller->decl)
+ != DECL_FUNCTION_PERSONALITY (cg_edge->callee->decl)))
+ goto egress;
+
/* Don't try to inline functions that are not well-suited to
inlining. */
if (!cgraph_inline_p (cg_edge, &reason))
#endif
/* We will be inlining this callee. */
- id->eh_region = lookup_stmt_eh_region (stmt);
+ id->eh_lp_nr = lookup_stmt_eh_lp (stmt);
+
+ /* Update the callers EH personality. */
+ if (DECL_FUNCTION_PERSONALITY (cg_edge->callee->decl))
+ DECL_FUNCTION_PERSONALITY (cg_edge->caller->decl)
+ = DECL_FUNCTION_PERSONALITY (cg_edge->callee->decl);
/* Split the block holding the GIMPLE_CALL. */
e = split_block (bb, stmt);
}
/* Declare the return variable for the function. */
- retvar = declare_return_variable (id, return_slot, modify_dest, &use_retvar);
+ use_retvar = declare_return_variable (id, return_slot, modify_dest);
/* Add local vars in this inlined callee to caller. */
t_step = id->src_cfun->local_decls;
cfun->local_decls);
}
+ if (dump_file && (dump_flags & TDF_DETAILS))
+ {
+ fprintf (dump_file, "Inlining ");
+ print_generic_expr (dump_file, id->src_fn, 0);
+ fprintf (dump_file, " to ");
+ print_generic_expr (dump_file, id->dst_fn, 0);
+ fprintf (dump_file, " with frequency %i\n", cg_edge->frequency);
+ }
+
/* This is it. Duplicate the callee body. Assume callee is
pre-gimplified. Note that we must not alter the caller
function in any way before this point, as this CALL_EXPR may be
a self-referential call; if we're calling ourselves, we need to
duplicate our body before altering anything. */
- copy_body (id, bb->count, bb->frequency, bb, return_block);
+ copy_body (id, bb->count,
+ cg_edge->frequency * REG_BR_PROB_BASE / CGRAPH_FREQ_BASE,
+ bb, return_block);
- /* Reset the escaped and callused solutions. */
+ /* Reset the escaped solution. */
if (cfun->gimple_df)
- {
- pt_solution_reset (&cfun->gimple_df->escaped);
- pt_solution_reset (&cfun->gimple_df->callused);
- }
+ pt_solution_reset (&cfun->gimple_df->escaped);
/* Clean up. */
if (id->debug_map)
gimple old_stmt = gsi_stmt (gsi);
tree old_decl = is_gimple_call (old_stmt) ? gimple_call_fndecl (old_stmt) : 0;
- if (fold_stmt (&gsi))
+ if (old_decl && DECL_BUILT_IN (old_decl))
+ {
+ /* Folding builtins can create multiple instructions,
+ we need to look at all of them. */
+ gimple_stmt_iterator i2 = gsi;
+ gsi_prev (&i2);
+ if (fold_stmt (&gsi))
+ {
+ gimple new_stmt;
+ if (gsi_end_p (i2))
+ i2 = gsi_start_bb (BASIC_BLOCK (first));
+ else
+ gsi_next (&i2);
+ while (1)
+ {
+ new_stmt = gsi_stmt (i2);
+ update_stmt (new_stmt);
+ cgraph_update_edges_for_call_stmt (old_stmt, old_decl,
+ new_stmt);
+
+ if (new_stmt == gsi_stmt (gsi))
+ {
+ /* It is okay to check only for the very last
+ of these statements. If it is a throwing
+ statement nothing will change. If it isn't
+ this can remove EH edges. If that weren't
+ correct then because some intermediate stmts
+ throw, but not the last one. That would mean
+ we'd have to split the block, which we can't
+ here and we'd loose anyway. And as builtins
+ probably never throw, this all
+ is mood anyway. */
+ if (maybe_clean_or_replace_eh_stmt (old_stmt,
+ new_stmt))
+ gimple_purge_dead_eh_edges (BASIC_BLOCK (first));
+ break;
+ }
+ gsi_next (&i2);
+ }
+ }
+ }
+ else if (fold_stmt (&gsi))
{
/* Re-read the statement from GSI as fold_stmt() may
have changed it. */
if (is_gimple_call (old_stmt)
|| is_gimple_call (new_stmt))
- cgraph_update_edges_for_call_stmt (old_stmt, old_decl, new_stmt);
+ cgraph_update_edges_for_call_stmt (old_stmt, old_decl,
+ new_stmt);
if (maybe_clean_or_replace_eh_stmt (old_stmt, new_stmt))
gimple_purge_dead_eh_edges (BASIC_BLOCK (first));
optimize_inline_calls (tree fn)
{
copy_body_data id;
- tree prev_fn;
basic_block bb;
int last = n_basic_blocks;
struct gimplify_ctx gctx;
id.src_node = id.dst_node = cgraph_node (fn);
id.dst_fn = fn;
/* Or any functions that aren't finished yet. */
- prev_fn = NULL_TREE;
if (current_function_decl)
- {
- id.dst_fn = current_function_decl;
- prev_fn = current_function_decl;
- }
+ id.dst_fn = current_function_decl;
id.copy_decl = copy_decl_maybe_to_var;
id.transform_call_graph_edges = CB_CGE_DUPLICATE;
gcc_assert (e->inline_failed);
}
#endif
-
+
/* Fold the statements before compacting/renumbering the basic blocks. */
fold_marked_statements (last, id.statements_to_fold);
pointer_set_destroy (id.statements_to_fold);
-
+
gcc_assert (!id.debug_stmts);
/* Renumber the (code) basic_blocks consecutively. */
DECL_IGNORED_P (copy) = DECL_IGNORED_P (decl);
/* Set the DECL_ABSTRACT_ORIGIN so the debugging routines know what
- declaration inspired this copy. */
+ declaration inspired this copy. */
DECL_ABSTRACT_ORIGIN (copy) = DECL_ORIGIN (decl);
/* The new variable/label has no RTL, yet. */
if (CODE_CONTAINS_STRUCT (TREE_CODE (copy), TS_DECL_WRTL)
&& !TREE_STATIC (copy) && !DECL_EXTERNAL (copy))
SET_DECL_RTL (copy, NULL_RTX);
-
+
/* These args would always appear unused, if not for this. */
TREE_USED (copy) = 1;
copy = build_decl (DECL_SOURCE_LOCATION (id->dst_fn),
VAR_DECL, DECL_NAME (decl), type);
+ if (DECL_PT_UID_SET_P (decl))
+ SET_DECL_PT_UID (copy, DECL_PT_UID (decl));
TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl);
TREE_READONLY (copy) = TREE_READONLY (decl);
TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl);
copy = build_decl (DECL_SOURCE_LOCATION (id->dst_fn),
VAR_DECL, DECL_NAME (decl), type);
+ if (DECL_PT_UID_SET_P (decl))
+ SET_DECL_PT_UID (copy, DECL_PT_UID (decl));
TREE_READONLY (copy) = TREE_READONLY (decl);
TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl);
if (!DECL_BY_REFERENCE (decl))
else
cgraph_remove_edge (e);
}
-
+
if (node->clones)
node = node->clones;
else if (node->next_sibling_clone)
if (changed)
tidy_fallthru_edges ();
-#ifdef ENABLE_CHECKING0
- verify_cgraph_node (id->dst_node);
- if (id->transform_call_graph_edges == CB_CGE_MOVE_CLONES
- && id->dst_node->clones)
- {
- struct cgraph_node *node;
- for (node = id->dst_node->clones; node != id->dst_node;)
- {
- verify_cgraph_node (node);
-
- if (node->clones)
- node = node->clones;
- else if (node->next_sibling_clone)
- node = node->next_sibling_clone;
- else
- {
- while (node != id->dst_node && !node->next_sibling_clone)
- node = node->clone_of;
- if (node != id->dst_node)
- node = node->next_sibling_clone;
- }
- }
- }
-#endif
return changed;
}
/* Create a copy of a function's tree.
OLD_DECL and NEW_DECL are FUNCTION_DECL tree nodes
of the original function and the new copied function
- respectively. In case we want to replace a DECL
- tree with another tree while duplicating the function's
- body, TREE_MAP represents the mapping between these
+ respectively. In case we want to replace a DECL
+ tree with another tree while duplicating the function's
+ body, TREE_MAP represents the mapping between these
trees. If UPDATE_CLONES is set, the call_stmt fields
of edges of clones of the function will be updated. */
void
DECL_ARTIFICIAL (new_decl) = 1;
DECL_ABSTRACT_ORIGIN (new_decl) = DECL_ORIGIN (old_decl);
+ DECL_FUNCTION_PERSONALITY (new_decl) = DECL_FUNCTION_PERSONALITY (old_decl);
/* Prepare the data structures for the tree copy. */
memset (&id, 0, sizeof (id));
id.src_node = old_version_node;
id.dst_node = new_version_node;
id.src_cfun = DECL_STRUCT_FUNCTION (old_decl);
-
+ if (id.src_node->ipa_transforms_to_apply)
+ {
+ VEC(ipa_opt_pass,heap) * old_transforms_to_apply = id.dst_node->ipa_transforms_to_apply;
+ unsigned int i;
+
+ id.dst_node->ipa_transforms_to_apply = VEC_copy (ipa_opt_pass, heap,
+ id.src_node->ipa_transforms_to_apply);
+ for (i = 0; i < VEC_length (ipa_opt_pass, old_transforms_to_apply); i++)
+ VEC_safe_push (ipa_opt_pass, heap, id.dst_node->ipa_transforms_to_apply,
+ VEC_index (ipa_opt_pass,
+ old_transforms_to_apply,
+ i));
+ }
+
id.copy_decl = copy_decl_no_change;
id.transform_call_graph_edges
= update_clones ? CB_CGE_MOVE_CLONES : CB_CGE_MOVE;
old_entry_block = ENTRY_BLOCK_PTR_FOR_FUNCTION
(DECL_STRUCT_FUNCTION (old_decl));
initialize_cfun (new_decl, old_decl,
- old_entry_block->count,
- old_entry_block->frequency);
+ old_entry_block->count);
push_cfun (DECL_STRUCT_FUNCTION (new_decl));
-
+
/* Copy the function's static chain. */
p = DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl;
if (p)
DECL_STRUCT_FUNCTION (new_decl)->static_chain_decl =
copy_static_chain (DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl,
&id);
-
+
/* If there's a tree_map, prepare for substitution. */
if (tree_map)
for (i = 0; i < VEC_length (ipa_replace_map_p, tree_map); i++)
if (TREE_CODE (op) == VIEW_CONVERT_EXPR)
op = TREE_OPERAND (op, 0);
-
+
if (TREE_CODE (op) == ADDR_EXPR)
{
op = TREE_OPERAND (op, 0);
DECL_ARGUMENTS (new_decl) =
copy_arguments_for_versioning (DECL_ARGUMENTS (old_decl), &id,
args_to_skip, &vars);
-
+
DECL_INITIAL (new_decl) = remap_blocks (DECL_INITIAL (id.src_fn), &id);
-
+
/* Renumber the lexical scoping (non-code) blocks consecutively. */
number_blocks (id.dst_fn);
-
+
declare_inline_vars (DECL_INITIAL (new_decl), vars);
if (DECL_STRUCT_FUNCTION (old_decl)->local_decls != NULL_TREE)
tree_cons (NULL_TREE, remap_decl (var, &id),
cfun->local_decls);
}
-
+
/* Copy the Function's body. */
- copy_body (&id, old_entry_block->count, old_entry_block->frequency,
+ copy_body (&id, old_entry_block->count, REG_BR_PROB_BASE,
ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR);
-
+
if (DECL_RESULT (old_decl) != NULL_TREE)
{
tree *res_decl = &DECL_RESULT (old_decl);
DECL_RESULT (new_decl) = remap_decl (*res_decl, &id);
lang_hooks.dup_lang_specific_decl (DECL_RESULT (new_decl));
}
-
+
/* Renumber the lexical scoping (non-code) blocks consecutively. */
number_blocks (new_decl);
id.do_not_unshare = true;
/* We're not inside any EH region. */
- id.eh_region = -1;
+ id.eh_lp_nr = 0;
t = copy_tree_body (&id);
pointer_map_destroy (decl_map);
return false;
}
#endif
- tree caller, callee;
+ tree caller, callee, lhs;
caller = e->caller->decl;
callee = e->callee->decl;
+ /* We cannot inline a function that uses a different EH personality
+ than the caller. */
+ if (DECL_FUNCTION_PERSONALITY (caller)
+ && DECL_FUNCTION_PERSONALITY (callee)
+ && (DECL_FUNCTION_PERSONALITY (caller)
+ != DECL_FUNCTION_PERSONALITY (callee)))
+ {
+ e->inline_failed = CIF_UNSPECIFIED;
+ gimple_call_set_cannot_inline (e->call_stmt, true);
+ return false;
+ }
+
/* Allow the backend to decide if inlining is ok. */
if (!targetm.target_option.can_inline_p (caller, callee))
{
e->inline_failed = CIF_TARGET_OPTION_MISMATCH;
gimple_call_set_cannot_inline (e->call_stmt, true);
+ e->call_stmt_cannot_inline_p = true;
return false;
}
- if (!gimple_check_call_args (e->call_stmt))
+ /* Do not inline calls where we cannot triviall work around mismatches
+ in argument or return types. */
+ if (e->call_stmt
+ && ((DECL_RESULT (callee)
+ && !DECL_BY_REFERENCE (DECL_RESULT (callee))
+ && (lhs = gimple_call_lhs (e->call_stmt)) != NULL_TREE
+ && !useless_type_conversion_p (TREE_TYPE (DECL_RESULT (callee)),
+ TREE_TYPE (lhs))
+ && !fold_convertible_p (TREE_TYPE (DECL_RESULT (callee)), lhs))
+ || !gimple_check_call_args (e->call_stmt)))
{
e->inline_failed = CIF_MISMATCHED_ARGUMENTS;
gimple_call_set_cannot_inline (e->call_stmt, true);
+ e->call_stmt_cannot_inline_p = true;
return false;
}
OSDN Git Service
