tree-emutls.cc File Reference

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "backend.h"
#include "target.h"
#include "tree.h"
#include "gimple.h"
#include "tree-pass.h"
#include "ssa.h"
#include "cgraph.h"
#include "fold-const.h"
#include "stor-layout.h"
#include "varasm.h"
#include "gimple-iterator.h"
#include "gimple-walk.h"
#include "langhooks.h"
#include "tree-iterator.h"
#include "gimplify.h"
#include "diagnostic-core.h"

Include dependency graph for tree-emutls.cc:

Data Structures
struct	tls_var_data
struct	lower_emutls_data

Macros
#define	EMUTLS_SEPARATOR   "."

Functions
static tree	prefix_name (const char *prefix, tree name)
static tree	get_emutls_object_name (tree name)
tree	default_emutls_var_fields (tree type, tree *name)
tree	default_emutls_var_init (tree to, tree decl, tree proxy)
static tree	get_emutls_object_type (void)
static tree	get_emutls_init_templ_addr (tree decl)
static tree	new_emutls_decl (tree decl, tree alias_of)
static void	emutls_common_1 (tree tls_decl, tree control_decl, tree *pstmts)
static tree	gen_emutls_addr (tree decl, struct lower_emutls_data *d, bool for_debug)
static tree	lower_emutls_2 (tree *ptr, int *walk_subtrees, void *)
static tree	lower_emutls_1 (tree *ptr, int *walk_subtrees, void *cb_data)
static void	lower_emutls_stmt (gimple *stmt, struct lower_emutls_data *d)
static void	lower_emutls_phi_arg (gphi *phi, unsigned int i, struct lower_emutls_data *d)
bool	reset_access (varpool_node *const &, tls_var_data *data, void *)
static void	clear_access_vars (void)
static void	lower_emutls_function_body (struct cgraph_node *node)
static bool	create_emultls_var (varpool_node *var, void *data)
static unsigned int	ipa_lower_emutls (void)
simple_ipa_opt_pass *	make_pass_ipa_lower_emutls (gcc::context *ctxt)

Variables
static hash_map< varpool_node *, tls_var_data > *	tls_map = NULL
static tree	emutls_object_type

Macro Definition Documentation

EMUTLS_SEPARATOR

#define EMUTLS_SEPARATOR   "."

Referenced by get_emutls_init_templ_addr(), and get_emutls_object_name().

Function Documentation

clear_access_vars()

static void clear_access_vars ( void )

inlinestatic

Clear the access variables, in order to begin a new block.   

References NULL, reset_access(), and tls_map.

Referenced by lower_emutls_function_body().

create_emultls_var()

static bool create_emultls_var ( varpool_node * var, void * data )

static

Create emutls variable for VAR, DATA is pointer to static
ctor body we can add constructors to.
Callback for varpool_for_variable_and_aliases.   

References symtab_node::alias, symtab_node::analyzed, tls_var_data::control_var, symtab_node::decl, DECL_HAS_VALUE_EXPR_P, emutls_common_1(), varpool_node::get(), varpool_node::get_alias_target(), ggc_alloc(), new_emutls_decl(), NULL, SET_DECL_VALUE_EXPR, and tls_map.

Referenced by ipa_lower_emutls().

default_emutls_var_fields()

tree default_emutls_var_fields	(	tree	type,
		tree *	name )

Create the fields of the type for the control variables.  Ordinarily
this must match struct __emutls_object defined in emutls.c.  However
this is a target hook so that VxWorks can define its own layout.   

References build_decl(), DECL_CHAIN, DECL_CONTEXT, get_identifier(), ggc_alloc(), ptr_type_node, type(), lang_hooks_for_types::type_for_mode, lang_hooks::types, UNKNOWN_LOCATION, and word_mode.

default_emutls_var_init()

tree default_emutls_var_init	(	tree	to,
		tree	decl,
		tree	proxy )

Initialize emulated tls object TO, which refers to TLS variable DECL and
is initialized by PROXY.  As above, this is the default implementation of
a target hook overridden by VxWorks.   

References build_constructor(), build_int_cst(), DECL_ALIGN_UNIT, DECL_CHAIN, DECL_SIZE_UNIT, fold_convert, ggc_alloc(), constructor_elt::index, null_pointer_node, TREE_TYPE, TYPE_FIELDS, constructor_elt::value, and vec_alloc().

emutls_common_1()

static void emutls_common_1 ( tree tls_decl, tree control_decl, tree * pstmts )

static

Generate a call statement to initialize CONTROL_DECL for TLS_DECL.
This only needs to happen for TLS COMMON variables; non-COMMON
variables can be initialized statically.  Insert the generated
call statement at the end of PSTMTS.   

References append_to_statement_list(), build_call_expr(), build_fold_addr_expr, build_int_cst(), builtin_decl_explicit(), DECL_ALIGN_UNIT, DECL_COMMON, DECL_INITIAL, DECL_SIZE_UNIT, error_mark_node, fold_convert, get_emutls_init_templ_addr(), ggc_alloc(), targetm, lang_hooks_for_types::type_for_mode, lang_hooks::types, and word_mode.

Referenced by create_emultls_var().

gen_emutls_addr()

static tree gen_emutls_addr ( tree decl, struct lower_emutls_data * d, bool for_debug )

static

Given a TLS variable DECL, return an SSA_NAME holding its address.
Append any new computation statements required to D->SEQ.   

References lower_emutls_data::bb, build_fold_addr_expr, build_pointer_type(), lower_emutls_data::builtin_decl, lower_emutls_data::builtin_node, lower_emutls_data::cfun_node, basic_block_def::count, cgraph_node::create_edge(), symtab_node::create_reference(), create_tmp_var, varpool_node::get(), ggc_alloc(), gimple_build_call(), gimple_call_set_lhs(), gimple_seq_add_stmt(), gimple_set_location(), IPA_REF_ADDR, lower_emutls_data::loc, make_ssa_name(), NULL, lower_emutls_data::seq, tls_map, TREE_ADDRESSABLE, and TREE_TYPE.

Referenced by lower_emutls_1().

get_emutls_init_templ_addr()

static tree get_emutls_init_templ_addr ( tree decl )

static

Create a read-only variable like DECL, with the same DECL_INITIAL.
This will be used for initializing the emulated tls data area.   

References varpool_node::add(), build_decl(), build_fold_addr_expr, DECL_ARTIFICIAL, DECL_ASSEMBLER_NAME, DECL_CONTEXT, DECL_EXTERNAL, DECL_IGNORED_P, DECL_INITIAL, DECL_NAME, DECL_ONE_ONLY, DECL_PRESERVE_P, DECL_SECTION_NAME, DECL_SOURCE_LOCATION, DECL_VISIBILITY, DECL_VISIBILITY_SPECIFIED, DECL_WEAK, EMUTLS_SEPARATOR, varpool_node::get_create(), ggc_alloc(), make_decl_one_only(), NULL, null_pointer_node, prefix_name(), SET_DECL_ASSEMBLER_NAME, set_decl_section_name(), targetm, TREE_PUBLIC, TREE_READONLY, TREE_STATIC, TREE_TYPE, and TREE_USED.

Referenced by emutls_common_1(), and new_emutls_decl().

get_emutls_object_name()

static tree get_emutls_object_name ( tree name )

static

Create an identifier for the struct __emutls_object, given an identifier
of the DECL_ASSEMBLY_NAME of the original object.   

References EMUTLS_SEPARATOR, prefix_name(), and targetm.

Referenced by ipa_lower_emutls(), and new_emutls_decl().

get_emutls_object_type()

static tree get_emutls_object_type ( void )

static

Create the structure for struct __emutls_object.  This should match the
structure at the top of emutls.c, modulo the union there.   

References build_decl(), emutls_object_type, get_identifier(), ggc_alloc(), layout_type(), lang_hooks_for_types::make_type, NULL, targetm, type(), TYPE_FIELDS, TYPE_NAME, lang_hooks::types, and UNKNOWN_LOCATION.

Referenced by new_emutls_decl().

ipa_lower_emutls()

static unsigned int ipa_lower_emutls ( void )

static

Main entry point to the tls lowering pass.   

References symtab_node::alias, alias_pairs, symtab_node::analyzed, varpool_node::call_for_symbol_and_aliases(), cgraph_build_static_cdtor(), create_emultls_var(), symtab_node::decl, alias_pair::decl, DECL_EXTERNAL, DECL_THREAD_LOCAL_P, DEFAULT_INIT_PRIORITY, symtab_node::definition, dump_file, FOR_EACH_DEFINED_FUNCTION, FOR_EACH_VARIABLE, FOR_EACH_VEC_SAFE_ELT, gcc_checking_assert, varpool_node::get(), get_emutls_object_name(), ggc_alloc(), i, lower_emutls_function_body(), cgraph_node::lowered, NULL, alias_pair::target, tls_map, TREE_STATIC, varpool_node::ultimate_alias_target(), and visited.

lower_emutls_1()

static tree lower_emutls_1 ( tree * ptr, int * walk_subtrees, void * cb_data )

static

Callback for walk_gimple_op.  D = WI->INFO is a struct lower_emutls_data.
Given an operand *PTR within D->STMT, if the operand references a TLS
variable, then lower the reference to a call to the runtime.  Insert
any new statements required into D->SEQ; the caller is responsible for
placing those appropriately.   

References build2(), build_int_cst(), create_tmp_var, DECL_THREAD_LOCAL_P, error_mark_node, EXPR_P, gen_emutls_addr(), ggc_alloc(), gimple_assign_set_lhs(), gimple_build_assign(), gimple_debug_bind_reset_value(), gimple_seq_add_stmt(), gimple_set_location(), is_gimple_debug(), is_gimple_min_invariant(), lower_emutls_data::loc, lower_emutls_1(), lower_emutls_2(), make_ssa_name(), NULL, NULL_TREE, lower_emutls_data::seq, TREE_CODE, TREE_OPERAND, TREE_TYPE, unshare_expr(), update_stmt(), and walk_tree.

Referenced by lower_emutls_1(), lower_emutls_phi_arg(), and lower_emutls_stmt().

lower_emutls_2()

static tree lower_emutls_2 ( tree * ptr, int * walk_subtrees, void *  )

static

Callback for lower_emutls_1, return non-NULL if there is any TLS
VAR_DECL in the subexpressions.   

References DECL_THREAD_LOCAL_P, EXPR_P, ggc_alloc(), NULL_TREE, and VAR_P.

Referenced by lower_emutls_1().

lower_emutls_function_body()

static void lower_emutls_function_body ( struct cgraph_node * node )

static

Lower the entire function NODE.   

References lower_emutls_data::bb, lower_emutls_data::builtin_decl, builtin_decl_explicit(), lower_emutls_data::builtin_node, cfun, lower_emutls_data::cfun_node, clear_access_vars(), symtab_node::decl, DECL_STRUCT_FUNCTION, EDGE_COUNT, EDGE_PRED, FOR_EACH_BB_FN, cgraph_node::get_create(), ggc_alloc(), gimple_seq_empty_p(), gsi_commit_edge_inserts(), gsi_end_p(), gsi_insert_seq_before(), gsi_insert_seq_on_edge(), gsi_next(), GSI_SAME_STMT, gsi_start_bb(), gsi_start_phis(), gsi_stmt(), i, lower_emutls_phi_arg(), lower_emutls_stmt(), NULL, phi_nodes(), pop_cfun(), basic_block_def::preds, push_cfun(), and lower_emutls_data::seq.

Referenced by ipa_lower_emutls().

lower_emutls_phi_arg()

static void lower_emutls_phi_arg ( gphi * phi, unsigned int i, struct lower_emutls_data * d )

static

Lower the I'th operand of PHI.   

References gcc_assert, ggc_alloc(), gimple_phi_arg(), i, link_imm_use_stmt(), lower_emutls_data::loc, lower_emutls_1(), NULL, TREE_CODE, and walk_tree.

Referenced by lower_emutls_function_body().

lower_emutls_stmt()

static void lower_emutls_stmt ( gimple * stmt, struct lower_emutls_data * d )

static

Lower all of the operands of STMT.   

References ggc_alloc(), gimple_location(), lower_emutls_data::loc, lower_emutls_1(), walk_stmt_info::stmt, update_stmt(), and walk_gimple_op().

Referenced by lower_emutls_function_body().

make_pass_ipa_lower_emutls()

simple_ipa_opt_pass * make_pass_ipa_lower_emutls

(

gcc::context *

ctxt

)

IPA Passes  

References ggc_alloc().

new_emutls_decl()

static tree new_emutls_decl ( tree decl, tree alias_of )

static

Create and return the control variable for the TLS variable DECL.   

References varpool_node::add(), build_decl(), varpool_node::create_alias(), symtab_node::decl, DECL_ARTIFICIAL, DECL_ASSEMBLER_NAME, DECL_ATTRIBUTES, DECL_COMMON, DECL_CONTEXT, DECL_DLLIMPORT_P, DECL_EXTERNAL, DECL_IGNORED_P, DECL_INITIAL, DECL_NAME, DECL_ONE_ONLY, DECL_PRESERVE_P, DECL_SOURCE_LOCATION, DECL_USER_ALIGN, DECL_VALUE_EXPR, DECL_VISIBILITY, DECL_VISIBILITY_SPECIFIED, DECL_WEAK, error_mark_node, varpool_node::get_create(), get_emutls_init_templ_addr(), get_emutls_object_name(), get_emutls_object_type(), varpool_node::get_for_asmname(), ggc_alloc(), make_decl_one_only(), record_references_in_initializer(), symtab_node::resolve_alias(), SET_DECL_ASSEMBLER_NAME, set_decl_section_name(), set_decl_tls_model(), targetm, TLS_MODEL_EMULATED, TREE_PUBLIC, TREE_READONLY, TREE_STATIC, and TREE_USED.

Referenced by create_emultls_var().

prefix_name()

static tree prefix_name ( const char * prefix, tree name )

static

Create an IDENTIFIER_NODE by prefixing PREFIX to the
IDENTIFIER_NODE NAME's name.   

References alloca, get_identifier(), ggc_alloc(), and IDENTIFIER_POINTER.

Referenced by get_emutls_init_templ_addr(), and get_emutls_object_name().

reset_access()

bool reset_access	(	varpool_node *const &	,
		tls_var_data *	data,
		void *	)

Reset access variable for a given TLS variable data DATA.   

References NULL.

Referenced by clear_access_vars().

Variable Documentation

emutls_object_type

tree emutls_object_type

static

The type of the control structure, shared with the emutls.c runtime.   

Referenced by get_emutls_object_type().

tls_map

hash_map<varpool_node *, tls_var_data>* tls_map = NULL

static

TLS map accesses mapping between a TLS varpool node and a pair
made by control variable and access variable.   

Referenced by clear_access_vars(), create_emultls_var(), gen_emutls_addr(), and ipa_lower_emutls().