/* Interprocedural analyses.
- Copyright (C) 2005-2014 Free Software Foundation, Inc.
+ Copyright (C) 2005-2015 Free Software Foundation, Inc.
This file is part of GCC.
#ifndef IPA_PROP_H
#define IPA_PROP_H
-#include "vec.h"
-#include "cgraph.h"
-#include "alloc-pool.h"
-
/* The following definitions and interfaces are used by
interprocedural analyses or parameters. */
parameter or can apply one simple binary operation to it (such jump
functions are called polynomial).
- IPA_JF_KNOWN_TYPE is a special type of an "unknown" function that applies
- only to pointer parameters. It means that even though we cannot prove that
- the passed value is an interprocedural constant, we still know the exact
- type of the containing object which may be valuable for devirtualization.
-
Jump functions are computed in ipa-prop.c by function
update_call_notes_after_inlining. Some information can be lost and jump
functions degraded accordingly when inlining, see
enum jump_func_type
{
IPA_JF_UNKNOWN = 0, /* newly allocated and zeroed jump functions default */
- IPA_JF_KNOWN_TYPE, /* represented by field known_type */
IPA_JF_CONST, /* represented by field costant */
IPA_JF_PASS_THROUGH, /* represented by field pass_through */
IPA_JF_ANCESTOR /* represented by field ancestor */
};
-/* Structure holding data required to describe a known type jump function. */
-struct GTY(()) ipa_known_type_data
-{
- /* Offset of the component of the base_type being described. */
- HOST_WIDE_INT offset;
- /* Type of the whole object. */
- tree base_type;
- /* Type of the component of the object that is being described. */
- tree component_type;
-};
-
struct ipa_cst_ref_desc;
/* Structure holding data required to describe a constant jump function. */
ipa_agg_jump_function). The flag is used only when the operation is
NOP_EXPR. */
unsigned agg_preserved : 1;
-
- /* When set to true, we guarantee that, if there is a C++ object pointed to
- by this object, it does not undergo dynamic type change in the course of
- functions decribed by this jump function. */
- unsigned type_preserved : 1;
};
/* Structure holding data required to describe an ancestor pass-through
{
/* Offset of the field representing the ancestor. */
HOST_WIDE_INT offset;
- /* Type of the result.
- When TYPE_PRESERVED is false, TYPE is NULL, since it is only
- relevant for the devirtualization machinery. */
- tree type;
/* Number of the caller's formal parameter being passed. */
int formal_id;
/* Flag with the same meaning like agg_preserve in ipa_pass_through_data. */
unsigned agg_preserved : 1;
- /* When set to true, we guarantee that, if there is a C++ object pointed to
- by this object, it does not undergo dynamic type change in the course of
- functions decribed by this jump function. */
- unsigned type_preserved : 1;
};
/* An element in an aggegate part of a jump function describing a known value
typedef struct ipa_agg_jump_function *ipa_agg_jump_function_p;
+/* Info about pointer alignments. */
+struct GTY(()) ipa_alignment
+{
+ /* The data fields below are valid only if known is true. */
+ bool known;
+ /* See ptr_info_def and get_pointer_alignment_1 for description of these
+ two. */
+ unsigned align;
+ unsigned misalign;
+};
+
/* A jump function for a callsite represents the values passed as actual
arguments of the callsite. See enum jump_func_type for the various
types of jump functions supported. */
description. */
struct ipa_agg_jump_function agg;
+ /* Information about alignment of pointers. */
+ struct ipa_alignment alignment;
+
enum jump_func_type type;
/* Represents a value of a jump function. pass_through is used only in jump
function context. constant represents the actual constant in constant jump
functions and member_cst holds constant c++ member functions. */
union jump_func_value
{
- struct ipa_known_type_data GTY ((tag ("IPA_JF_KNOWN_TYPE"))) known_type;
struct ipa_constant_data GTY ((tag ("IPA_JF_CONST"))) constant;
struct ipa_pass_through_data GTY ((tag ("IPA_JF_PASS_THROUGH"))) pass_through;
struct ipa_ancestor_jf_data GTY ((tag ("IPA_JF_ANCESTOR"))) ancestor;
};
-/* Return the offset of the component that is described by a known type jump
- function JFUNC. */
-
-static inline HOST_WIDE_INT
-ipa_get_jf_known_type_offset (struct ipa_jump_func *jfunc)
-{
- gcc_checking_assert (jfunc->type == IPA_JF_KNOWN_TYPE);
- return jfunc->value.known_type.offset;
-}
-
-/* Return the base type of a known type jump function JFUNC. */
-
-static inline tree
-ipa_get_jf_known_type_base_type (struct ipa_jump_func *jfunc)
-{
- gcc_checking_assert (jfunc->type == IPA_JF_KNOWN_TYPE);
- return jfunc->value.known_type.base_type;
-}
-
-/* Return the component type of a known type jump function JFUNC. */
-
-static inline tree
-ipa_get_jf_known_type_component_type (struct ipa_jump_func *jfunc)
-{
- gcc_checking_assert (jfunc->type == IPA_JF_KNOWN_TYPE);
- return jfunc->value.known_type.component_type;
-}
-
/* Return the constant stored in a constant jump functin JFUNC. */
static inline tree
return jfunc->value.pass_through.agg_preserved;
}
-/* Return the type_preserved flag of a pass through jump function JFUNC. */
+/* Return true if pass through jump function JFUNC preserves type
+ information. */
static inline bool
ipa_get_jf_pass_through_type_preserved (struct ipa_jump_func *jfunc)
{
gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH);
- return jfunc->value.pass_through.type_preserved;
+ return jfunc->value.pass_through.agg_preserved;
}
/* Return the offset of an ancestor jump function JFUNC. */
return jfunc->value.ancestor.offset;
}
-/* Return the result type of an ancestor jump function JFUNC. */
-
-static inline tree
-ipa_get_jf_ancestor_type (struct ipa_jump_func *jfunc)
-{
- gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR);
- return jfunc->value.ancestor.type;
-}
-
/* Return the number of the caller's formal parameter that an ancestor jump
function JFUNC refers to. */
return jfunc->value.ancestor.agg_preserved;
}
-/* Return the type_preserved flag of an ancestor jump function JFUNC. */
+/* Return true if ancestor jump function JFUNC presrves type information. */
static inline bool
ipa_get_jf_ancestor_type_preserved (struct ipa_jump_func *jfunc)
{
gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR);
- return jfunc->value.ancestor.type_preserved;
+ return jfunc->value.ancestor.agg_preserved;
}
/* Summary describing a single formal parameter. */
unsigned used : 1;
};
-struct ipcp_lattice;
-
/* ipa_node_params stores information related to formal parameters of functions
and some other information for interprocedural passes that operate on
parameters (such as ipa-cp). */
struct ipa_node_params
{
+ ~ipa_node_params ();
+
/* Information about individual formal parameters that are gathered when
summaries are generated. */
vec<ipa_param_descriptor> descriptors;
/* Only for versioned nodes this field would not be NULL,
it points to the node that IPA cp cloned from. */
struct cgraph_node *ipcp_orig_node;
- /* If this node is an ipa-cp clone, these are the known values that describe
- what it has been specialized for. */
- vec<tree> known_vals;
+ /* If this node is an ipa-cp clone, these are the known constants that
+ describe what it has been specialized for. */
+ vec<tree> known_csts;
+ /* If this node is an ipa-cp clone, these are the known polymorphic contexts
+ that describe what it has been specialized for. */
+ vec<ipa_polymorphic_call_context> known_contexts;
/* Whether the param uses analysis and jump function computation has already
been performed. */
unsigned analysis_done : 1;
/* Node has been completely replaced by clones and will be removed after
ipa-cp is finished. */
unsigned node_dead : 1;
+ /* Node is involved in a recursion, potentionally indirect. */
+ unsigned node_within_scc : 1;
+ /* Node is calling a private function called only once. */
+ unsigned node_calling_single_call : 1;
};
/* ipa_node_params access functions. Please use these to access fields that
static inline int
ipa_get_controlled_uses (struct ipa_node_params *info, int i)
{
- return info->descriptors[i].controlled_uses;
+ /* FIXME: introducing speuclation causes out of bounds access here. */
+ if (info->descriptors.length () > (unsigned)i)
+ return info->descriptors[i].controlled_uses;
+ return IPA_UNDESCRIBED_USE;
}
/* Set the controlled counter of a given parameter. */
bool by_ref;
};
-typedef struct ipa_agg_replacement_value *ipa_agg_replacement_value_p;
+/* Structure holding information for the transformation phase of IPA-CP. */
+
+struct GTY(()) ipcp_transformation_summary
+{
+ /* Linked list of known aggregate values. */
+ ipa_agg_replacement_value *agg_values;
+ /* Alignment information for pointers. */
+ vec<ipa_alignment, va_gc> *alignments;
+};
void ipa_set_node_agg_value_chain (struct cgraph_node *node,
struct ipa_agg_replacement_value *aggvals);
+void ipcp_grow_transformations_if_necessary (void);
/* ipa_edge_args stores information related to a callsite and particularly its
arguments. It can be accessed by the IPA_EDGE_REF macro. */
{
/* Vector of the callsite's jump function of each parameter. */
vec<ipa_jump_func, va_gc> *jump_functions;
+ vec<ipa_polymorphic_call_context, va_gc> *polymorphic_call_contexts;
};
/* ipa_edge_args access functions. Please use these to access fields that
return &(*args->jump_functions)[i];
}
-/* Types of vectors holding the infos. */
+/* Returns a pointer to the polymorphic call context for the ith argument.
+ NULL if contexts are not computed. */
+static inline struct ipa_polymorphic_call_context *
+ipa_get_ith_polymorhic_call_context (struct ipa_edge_args *args, int i)
+{
+ if (!args->polymorphic_call_contexts)
+ return NULL;
+ return &(*args->polymorphic_call_contexts)[i];
+}
+
+/* Function summary for ipa_node_params. */
+class ipa_node_params_t: public function_summary <ipa_node_params *>
+{
+public:
+ ipa_node_params_t (symbol_table *table):
+ function_summary<ipa_node_params *> (table) { }
-/* Vector where the parameter infos are actually stored. */
-extern vec<ipa_node_params> ipa_node_params_vector;
-/* Vector of known aggregate values in cloned nodes. */
-extern GTY(()) vec<ipa_agg_replacement_value_p, va_gc> *ipa_node_agg_replacements;
+ /* Hook that is called by summary when a node is duplicated. */
+ virtual void duplicate (cgraph_node *node,
+ cgraph_node *node2,
+ ipa_node_params *data,
+ ipa_node_params *data2);
+};
+
+/* Function summary where the parameter infos are actually stored. */
+extern ipa_node_params_t *ipa_node_params_sum;
+/* Vector of IPA-CP transformation data for each clone. */
+extern GTY(()) vec<ipcp_transformation_summary, va_gc> *ipcp_transformations;
/* Vector where the parameter infos are actually stored. */
extern GTY(()) vec<ipa_edge_args, va_gc> *ipa_edge_args_vector;
/* Return the associated parameter/argument info corresponding to the given
node/edge. */
-#define IPA_NODE_REF(NODE) (&ipa_node_params_vector[(NODE)->uid])
+#define IPA_NODE_REF(NODE) (ipa_node_params_sum->get (NODE))
#define IPA_EDGE_REF(EDGE) (&(*ipa_edge_args_vector)[(EDGE)->uid])
/* This macro checks validity of index returned by
ipa_get_param_decl_index function. */
void ipa_create_all_node_params (void);
void ipa_create_all_edge_args (void);
void ipa_free_edge_args_substructures (struct ipa_edge_args *);
-void ipa_free_node_params_substructures (struct ipa_node_params *);
void ipa_free_all_node_params (void);
void ipa_free_all_edge_args (void);
void ipa_free_all_structures_after_ipa_cp (void);
void ipa_free_all_structures_after_iinln (void);
+
void ipa_register_cgraph_hooks (void);
+int count_formal_params (tree fndecl);
/* This function ensures the array of node param infos is big enough to
accommodate a structure for all nodes and reallocates it if not. */
static inline void
ipa_check_create_node_params (void)
{
- if (!ipa_node_params_vector.exists ())
- ipa_node_params_vector.create (cgraph_max_uid);
-
- if (ipa_node_params_vector.length () <= (unsigned) cgraph_max_uid)
- ipa_node_params_vector.safe_grow_cleared (cgraph_max_uid + 1);
+ if (!ipa_node_params_sum)
+ ipa_node_params_sum = new ipa_node_params_t (symtab);
}
/* This function ensures the array of edge arguments infos is big enough to
static inline void
ipa_check_create_edge_args (void)
{
- if (vec_safe_length (ipa_edge_args_vector) <= (unsigned) cgraph_edge_max_uid)
- vec_safe_grow_cleared (ipa_edge_args_vector, cgraph_edge_max_uid + 1);
+ if (vec_safe_length (ipa_edge_args_vector)
+ <= (unsigned) symtab->edges_max_uid)
+ vec_safe_grow_cleared (ipa_edge_args_vector, symtab->edges_max_uid + 1);
}
/* Returns true if the array of edge infos is large enough to accommodate an
return ((unsigned) edge->uid < vec_safe_length (ipa_edge_args_vector));
}
+static inline ipcp_transformation_summary *
+ipcp_get_transformation_summary (cgraph_node *node)
+{
+ if ((unsigned) node->uid >= vec_safe_length (ipcp_transformations))
+ return NULL;
+ return &(*ipcp_transformations)[node->uid];
+}
+
/* Return the aggregate replacements for NODE, if there are any. */
static inline struct ipa_agg_replacement_value *
-ipa_get_agg_replacements_for_node (struct cgraph_node *node)
+ipa_get_agg_replacements_for_node (cgraph_node *node)
{
- if ((unsigned) node->uid >= vec_safe_length (ipa_node_agg_replacements))
- return NULL;
- return (*ipa_node_agg_replacements)[node->uid];
+ ipcp_transformation_summary *ts = ipcp_get_transformation_summary (node);
+ return ts ? ts->agg_values : NULL;
}
/* Function formal parameters related computations. */
void ipa_initialize_node_params (struct cgraph_node *node);
bool ipa_propagate_indirect_call_infos (struct cgraph_edge *cs,
- vec<cgraph_edge_p> *new_edges);
+ vec<cgraph_edge *> *new_edges);
/* Indirect edge and binfo processing. */
tree ipa_get_indirect_edge_target (struct cgraph_edge *ie,
vec<tree> ,
- vec<tree> ,
- vec<ipa_agg_jump_function_p> );
-struct cgraph_edge *ipa_make_edge_direct_to_target (struct cgraph_edge *, tree);
-tree ipa_binfo_from_known_type_jfunc (struct ipa_jump_func *);
-tree ipa_intraprocedural_devirtualization (gimple);
+ vec<ipa_polymorphic_call_context>,
+ vec<ipa_agg_jump_function_p>,
+ bool *);
+struct cgraph_edge *ipa_make_edge_direct_to_target (struct cgraph_edge *, tree,
+ bool speculative = false);
tree ipa_impossible_devirt_target (struct cgraph_edge *, tree);
/* Functions related to both. */
void ipa_print_all_jump_functions (FILE * f);
void ipcp_verify_propagated_values (void);
-extern alloc_pool ipcp_values_pool;
+extern alloc_pool ipcp_cst_values_pool;
+extern alloc_pool ipcp_poly_ctx_values_pool;
extern alloc_pool ipcp_sources_pool;
extern alloc_pool ipcp_agg_lattice_pool;
vec<tree> ipa_get_vector_of_formal_parms (tree fndecl);
vec<tree> ipa_get_vector_of_formal_parm_types (tree fntype);
void ipa_modify_formal_parameters (tree fndecl, ipa_parm_adjustment_vec);
-void ipa_modify_call_arguments (struct cgraph_edge *, gimple,
+void ipa_modify_call_arguments (struct cgraph_edge *, gcall *,
ipa_parm_adjustment_vec);
ipa_parm_adjustment_vec ipa_combine_adjustments (ipa_parm_adjustment_vec,
ipa_parm_adjustment_vec);
struct ipa_agg_replacement_value *av);
void ipa_prop_write_jump_functions (void);
void ipa_prop_read_jump_functions (void);
-void ipa_prop_write_all_agg_replacement (void);
-void ipa_prop_read_all_agg_replacement (void);
+void ipcp_write_transformation_summaries (void);
+void ipcp_read_transformation_summaries (void);
void ipa_update_after_lto_read (void);
int ipa_get_param_decl_index (struct ipa_node_params *, tree);
tree ipa_value_from_jfunc (struct ipa_node_params *info,
struct ipa_jump_func *jfunc);
unsigned int ipcp_transform_function (struct cgraph_node *node);
+ipa_polymorphic_call_context ipa_context_from_jfunc (ipa_node_params *,
+ cgraph_edge *,
+ int,
+ ipa_jump_func *);
void ipa_dump_param (FILE *, struct ipa_node_params *info, int i);
bool ipa_modify_expr (tree *, bool, ipa_parm_adjustment_vec);
ipa_parm_adjustment *ipa_get_adjustment_candidate (tree **, bool *,
tree build_ref_for_offset (location_t, tree, HOST_WIDE_INT, tree,
gimple_stmt_iterator *, bool);
+/* In ipa-cp.c */
+void ipa_cp_c_finalize (void);
+
#endif /* IPA_PROP_H */
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