/* Interprocedural analyses.
- Copyright (C) 2005, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of GCC.
#include "flags.h"
#include "timevar.h"
#include "flags.h"
+#include "diagnostic.h"
/* Vector where the parameter infos are actually stored. */
VEC (ipa_node_params_t, heap) *ipa_node_params_vector;
VEC (ipa_edge_args_t, heap) *ipa_edge_args_vector;
/* Holders of ipa cgraph hooks: */
-struct cgraph_edge_hook_list *edge_removal_hook_holder;
-struct cgraph_node_hook_list *node_removal_hook_holder;
-struct cgraph_2edge_hook_list *edge_duplication_hook_holder;
-struct cgraph_2node_hook_list *node_duplication_hook_holder;
+static struct cgraph_edge_hook_list *edge_removal_hook_holder;
+static struct cgraph_node_hook_list *node_removal_hook_holder;
+static struct cgraph_2edge_hook_list *edge_duplication_hook_holder;
+static struct cgraph_2node_hook_list *node_duplication_hook_holder;
+
+/* Add cgraph NODE described by INFO to the worklist WL regardless of whether
+ it is in one or not. It should almost never be used directly, as opposed to
+ ipa_push_func_to_list. */
+
+void
+ipa_push_func_to_list_1 (struct ipa_func_list **wl,
+ struct cgraph_node *node,
+ struct ipa_node_params *info)
+{
+ struct ipa_func_list *temp;
+
+ info->node_enqueued = 1;
+ temp = XCNEW (struct ipa_func_list);
+ temp->node = node;
+ temp->next = *wl;
+ *wl = temp;
+}
/* Initialize worklist to contain all functions. */
+
struct ipa_func_list *
ipa_init_func_list (void)
{
for (node = cgraph_nodes; node; node = node->next)
if (node->analyzed)
{
+ struct ipa_node_params *info = IPA_NODE_REF (node);
/* Unreachable nodes should have been eliminated before ipcp and
inlining. */
gcc_assert (node->needed || node->reachable);
- ipa_push_func_to_list (&wl, node);
+ ipa_push_func_to_list_1 (&wl, node, info);
}
return wl;
}
-/* Add cgraph node MT to the worklist. Set worklist element WL
- to point to MT. */
-void
-ipa_push_func_to_list (struct ipa_func_list **wl, struct cgraph_node *mt)
-{
- struct ipa_func_list *temp;
-
- temp = XCNEW (struct ipa_func_list);
- temp->node = mt;
- temp->next = *wl;
- *wl = temp;
-}
+/* Remove a function from the worklist WL and return it. */
-/* Remove a function from the worklist. WL points to the first
- element in the list, which is removed. */
struct cgraph_node *
-ipa_pop_func_from_list (struct ipa_func_list ** wl)
+ipa_pop_func_from_list (struct ipa_func_list **wl)
{
+ struct ipa_node_params *info;
struct ipa_func_list *first;
- struct cgraph_node *return_func;
+ struct cgraph_node *node;
first = *wl;
*wl = (*wl)->next;
- return_func = first->node;
+ node = first->node;
free (first);
- return return_func;
+
+ info = IPA_NODE_REF (node);
+ info->node_enqueued = 0;
+ return node;
}
-/* Return index of the formal whose tree is ptree in function which corresponds
- to info. */
+/* Return index of the formal whose tree is PTREE in function which corresponds
+ to INFO. */
+
static int
ipa_get_param_decl_index (struct ipa_node_params *info, tree ptree)
{
count = ipa_get_param_count (info);
for (i = 0; i < count; i++)
- if (ipa_get_ith_param(info, i) == ptree)
+ if (ipa_get_param(info, i) == ptree)
return i;
return -1;
}
-/* Insert the formal trees to the param_decls array in function MT. */
-void
-ipa_create_param_decls_array (struct cgraph_node *mt)
+/* Populate the param_decl field in parameter descriptors of INFO that
+ corresponds to NODE. */
+
+static void
+ipa_populate_param_decls (struct cgraph_node *node,
+ struct ipa_node_params *info)
{
tree fndecl;
tree fnargs;
tree parm;
int param_num;
- struct ipa_node_params *info = IPA_NODE_REF (mt);
- info->param_decls = XCNEWVEC (tree, ipa_get_param_count (info));
- fndecl = mt->decl;
+ fndecl = node->decl;
fnargs = DECL_ARGUMENTS (fndecl);
param_num = 0;
for (parm = fnargs; parm; parm = TREE_CHAIN (parm))
{
- info->param_decls[param_num] = parm;
+ info->params[param_num].decl = parm;
param_num++;
}
}
-/* Count number of formals in MT. Insert the result to the
- ipa_node_params. */
-void
-ipa_count_formal_params (struct cgraph_node *mt)
+/* Return how many formal parameters FNDECL has. */
+
+static inline int
+count_formal_params_1 (tree fndecl)
{
- tree fndecl;
- tree fnargs;
tree parm;
+ int count = 0;
+
+ for (parm = DECL_ARGUMENTS (fndecl); parm; parm = TREE_CHAIN (parm))
+ count++;
+
+ return count;
+}
+
+/* Count number of formal parameters in NOTE. Store the result to the
+ appropriate field of INFO. */
+
+static void
+ipa_count_formal_params (struct cgraph_node *node,
+ struct ipa_node_params *info)
+{
int param_num;
- fndecl = mt->decl;
- fnargs = DECL_ARGUMENTS (fndecl);
- param_num = 0;
- for (parm = fnargs; parm; parm = TREE_CHAIN (parm))
- param_num++;
- ipa_set_param_count (IPA_NODE_REF (mt), param_num);
+ param_num = count_formal_params_1 (node->decl);
+ ipa_set_param_count (info, param_num);
+}
+
+/* Initialize the ipa_node_params structure associated with NODE by counting
+ the function parameters, creating the descriptors and populating their
+ param_decls. */
+
+void
+ipa_initialize_node_params (struct cgraph_node *node)
+{
+ struct ipa_node_params *info = IPA_NODE_REF (node);
+
+ if (!info->params)
+ {
+ ipa_count_formal_params (node, info);
+ info->params = XCNEWVEC (struct ipa_param_descriptor,
+ ipa_get_param_count (info));
+ ipa_populate_param_decls (node, info);
+ }
+}
+
+/* Callback of walk_stmt_load_store_addr_ops for the visit_store and visit_addr
+ parameters. If OP is a parameter declaration, mark it as modified in the
+ info structure passed in DATA. */
+
+static bool
+visit_store_addr_for_mod_analysis (gimple stmt ATTRIBUTE_UNUSED,
+ tree op, void *data)
+{
+ struct ipa_node_params *info = (struct ipa_node_params *) data;
+
+ if (TREE_CODE (op) == PARM_DECL)
+ {
+ int index = ipa_get_param_decl_index (info, op);
+ gcc_assert (index >= 0);
+ info->params[index].modified = true;
+ }
+
+ return false;
+}
+
+/* Compute which formal parameters of function associated with NODE are locally
+ modified or their address is taken. Note that this does not apply on
+ parameters with SSA names but those can and should be analyzed
+ differently. */
+
+void
+ipa_detect_param_modifications (struct cgraph_node *node)
+{
+ tree decl = node->decl;
+ basic_block bb;
+ struct function *func;
+ gimple_stmt_iterator gsi;
+ struct ipa_node_params *info = IPA_NODE_REF (node);
+
+ if (ipa_get_param_count (info) == 0 || info->modification_analysis_done)
+ return;
+
+ func = DECL_STRUCT_FUNCTION (decl);
+ FOR_EACH_BB_FN (bb, func)
+ for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+ walk_stmt_load_store_addr_ops (gsi_stmt (gsi), info, NULL,
+ visit_store_addr_for_mod_analysis,
+ visit_store_addr_for_mod_analysis);
+
+ info->modification_analysis_done = 1;
+}
+
+/* Count number of arguments callsite CS has and store it in
+ ipa_edge_args structure corresponding to this callsite. */
+
+void
+ipa_count_arguments (struct cgraph_edge *cs)
+{
+ gimple stmt;
+ int arg_num;
+
+ stmt = cs->call_stmt;
+ gcc_assert (is_gimple_call (stmt));
+ arg_num = gimple_call_num_args (stmt);
+ if (VEC_length (ipa_edge_args_t, ipa_edge_args_vector)
+ <= (unsigned) cgraph_edge_max_uid)
+ VEC_safe_grow_cleared (ipa_edge_args_t, heap,
+ ipa_edge_args_vector, cgraph_edge_max_uid + 1);
+ ipa_set_cs_argument_count (IPA_EDGE_REF (cs), arg_num);
+}
+
+/* Print the jump functions of all arguments on all call graph edges going from
+ NODE to file F. */
+
+void
+ipa_print_node_jump_functions (FILE *f, struct cgraph_node *node)
+{
+ int i, count;
+ struct cgraph_edge *cs;
+ struct ipa_jump_func *jump_func;
+ enum jump_func_type type;
+
+ fprintf (f, " Jump functions of caller %s:\n", cgraph_node_name (node));
+ for (cs = node->callees; cs; cs = cs->next_callee)
+ {
+ if (!ipa_edge_args_info_available_for_edge_p (cs))
+ continue;
+
+ fprintf (f, " callsite %s ", cgraph_node_name (node));
+ fprintf (f, "-> %s :: \n", cgraph_node_name (cs->callee));
+
+ count = ipa_get_cs_argument_count (IPA_EDGE_REF (cs));
+ for (i = 0; i < count; i++)
+ {
+ jump_func = ipa_get_ith_jump_func (IPA_EDGE_REF (cs), i);
+ type = jump_func->type;
+
+ fprintf (f, " param %d: ", i);
+ if (type == IPA_JF_UNKNOWN)
+ fprintf (f, "UNKNOWN\n");
+ else if (type == IPA_JF_CONST)
+ {
+ tree val = jump_func->value.constant;
+ fprintf (f, "CONST: ");
+ print_generic_expr (f, val, 0);
+ fprintf (f, "\n");
+ }
+ else if (type == IPA_JF_CONST_MEMBER_PTR)
+ {
+ fprintf (f, "CONST MEMBER PTR: ");
+ print_generic_expr (f, jump_func->value.member_cst.pfn, 0);
+ fprintf (f, ", ");
+ print_generic_expr (f, jump_func->value.member_cst.delta, 0);
+ fprintf (f, "\n");
+ }
+ else if (type == IPA_JF_PASS_THROUGH)
+ {
+ fprintf (f, "PASS THROUGH: ");
+ fprintf (f, "%d, op %s ",
+ jump_func->value.pass_through.formal_id,
+ tree_code_name[(int)
+ jump_func->value.pass_through.operation]);
+ if (jump_func->value.pass_through.operation != NOP_EXPR)
+ print_generic_expr (dump_file,
+ jump_func->value.pass_through.operand, 0);
+ fprintf (dump_file, "\n");
+ }
+ else if (type == IPA_JF_ANCESTOR)
+ {
+ fprintf (f, "ANCESTOR: ");
+ fprintf (f, "%d, offset "HOST_WIDE_INT_PRINT_DEC"\n",
+ jump_func->value.ancestor.formal_id,
+ jump_func->value.ancestor.offset);
+ }
+ }
+ }
+}
+
+/* Print ipa_jump_func data structures of all nodes in the call graph to F. */
+
+void
+ipa_print_all_jump_functions (FILE *f)
+{
+ struct cgraph_node *node;
+
+ fprintf (f, "\nJump functions:\n");
+ for (node = cgraph_nodes; node; node = node->next)
+ {
+ ipa_print_node_jump_functions (f, node);
+ }
+}
+
+/* Determine whether passing ssa name NAME constitutes a polynomial
+ pass-through function or getting an address of an acestor and if so, write
+ such a jump function to JFUNC. INFO describes the caller. */
+
+static void
+compute_complex_pass_through (struct ipa_node_params *info,
+ struct ipa_jump_func *jfunc,
+ tree name)
+{
+ HOST_WIDE_INT offset, size, max_size;
+ tree op1, op2, type;
+ int index;
+ gimple stmt = SSA_NAME_DEF_STMT (name);
+
+ if (!is_gimple_assign (stmt))
+ return;
+ op1 = gimple_assign_rhs1 (stmt);
+ op2 = gimple_assign_rhs2 (stmt);
+
+ if (op2)
+ {
+ if (TREE_CODE (op1) != SSA_NAME
+ || !SSA_NAME_IS_DEFAULT_DEF (op1)
+ || !is_gimple_ip_invariant (op2))
+ return;
+
+ index = ipa_get_param_decl_index (info, SSA_NAME_VAR (op1));
+ if (index >= 0)
+ {
+ jfunc->type = IPA_JF_PASS_THROUGH;
+ jfunc->value.pass_through.formal_id = index;
+ jfunc->value.pass_through.operation = gimple_assign_rhs_code (stmt);
+ jfunc->value.pass_through.operand = op2;
+ }
+ return;
+ }
+
+ if (TREE_CODE (op1) != ADDR_EXPR)
+ return;
+ op1 = TREE_OPERAND (op1, 0);
+ type = TREE_TYPE (op1);
+
+ op1 = get_ref_base_and_extent (op1, &offset, &size, &max_size);
+ if (TREE_CODE (op1) != INDIRECT_REF
+ /* If this is a varying address, punt. */
+ || max_size == -1
+ || max_size != size)
+ return;
+ op1 = TREE_OPERAND (op1, 0);
+ if (TREE_CODE (op1) != SSA_NAME
+ || !SSA_NAME_IS_DEFAULT_DEF (op1))
+ return;
+
+ index = ipa_get_param_decl_index (info, SSA_NAME_VAR (op1));
+ if (index >= 0)
+ {
+ jfunc->type = IPA_JF_ANCESTOR;
+ jfunc->value.ancestor.formal_id = index;
+ jfunc->value.ancestor.offset = offset;
+ jfunc->value.ancestor.type = type;
+ }
+}
+
+
+/* Determine the jump functions of scalar arguments. Scalar means SSA names
+ and constants of a number of selected types. INFO is the ipa_node_params
+ structure associated with the caller, FUNCTIONS is a pointer to an array of
+ jump function structures associated with CALL which is the call statement
+ being examined.*/
+
+static void
+compute_scalar_jump_functions (struct ipa_node_params *info,
+ struct ipa_jump_func *functions,
+ gimple call)
+{
+ tree arg;
+ unsigned num = 0;
+
+ for (num = 0; num < gimple_call_num_args (call); num++)
+ {
+ arg = gimple_call_arg (call, num);
+
+ if (is_gimple_ip_invariant (arg))
+ {
+ functions[num].type = IPA_JF_CONST;
+ functions[num].value.constant = arg;
+ }
+ else if (TREE_CODE (arg) == SSA_NAME)
+ {
+ if (SSA_NAME_IS_DEFAULT_DEF (arg))
+ {
+ int index = ipa_get_param_decl_index (info, SSA_NAME_VAR (arg));
+
+ if (index >= 0)
+ {
+ functions[num].type = IPA_JF_PASS_THROUGH;
+ functions[num].value.pass_through.formal_id = index;
+ functions[num].value.pass_through.operation = NOP_EXPR;
+ }
+ }
+ else
+ compute_complex_pass_through (info, &functions[num], arg);
+ }
+ }
+}
+
+/* Inspect the given TYPE and return true iff it has the same structure (the
+ same number of fields of the same types) as a C++ member pointer. If
+ METHOD_PTR and DELTA are non-NULL, store the trees representing the
+ corresponding fields there. */
+
+static bool
+type_like_member_ptr_p (tree type, tree *method_ptr, tree *delta)
+{
+ tree fld;
+
+ if (TREE_CODE (type) != RECORD_TYPE)
+ return false;
+
+ fld = TYPE_FIELDS (type);
+ if (!fld || !POINTER_TYPE_P (TREE_TYPE (fld))
+ || TREE_CODE (TREE_TYPE (TREE_TYPE (fld))) != METHOD_TYPE)
+ return false;
+
+ if (method_ptr)
+ *method_ptr = fld;
+
+ fld = TREE_CHAIN (fld);
+ if (!fld || INTEGRAL_TYPE_P (fld))
+ return false;
+ if (delta)
+ *delta = fld;
+
+ if (TREE_CHAIN (fld))
+ return false;
+
+ return true;
+}
+
+/* Go through arguments of the CALL and for every one that looks like a member
+ pointer, check whether it can be safely declared pass-through and if so,
+ mark that to the corresponding item of jump FUNCTIONS. Return true iff
+ there are non-pass-through member pointers within the arguments. INFO
+ describes formal parameters of the caller. */
+
+static bool
+compute_pass_through_member_ptrs (struct ipa_node_params *info,
+ struct ipa_jump_func *functions,
+ gimple call)
+{
+ bool undecided_members = false;
+ unsigned num;
+ tree arg;
+
+ for (num = 0; num < gimple_call_num_args (call); num++)
+ {
+ arg = gimple_call_arg (call, num);
+
+ if (type_like_member_ptr_p (TREE_TYPE (arg), NULL, NULL))
+ {
+ if (TREE_CODE (arg) == PARM_DECL)
+ {
+ int index = ipa_get_param_decl_index (info, arg);
+
+ gcc_assert (index >=0);
+ if (!ipa_is_param_modified (info, index))
+ {
+ functions[num].type = IPA_JF_PASS_THROUGH;
+ functions[num].value.pass_through.formal_id = index;
+ functions[num].value.pass_through.operation = NOP_EXPR;
+ }
+ else
+ undecided_members = true;
+ }
+ else
+ undecided_members = true;
+ }
+ }
+
+ return undecided_members;
+}
+
+/* Simple function filling in a member pointer constant jump function (with PFN
+ and DELTA as the constant value) into JFUNC. */
+
+static void
+fill_member_ptr_cst_jump_function (struct ipa_jump_func *jfunc,
+ tree pfn, tree delta)
+{
+ jfunc->type = IPA_JF_CONST_MEMBER_PTR;
+ jfunc->value.member_cst.pfn = pfn;
+ jfunc->value.member_cst.delta = delta;
+}
+
+/* If RHS is an SSA_NAMe and it is defined by a simple copy assign statement,
+ return the rhs of its defining statement. */
+
+static inline tree
+get_ssa_def_if_simple_copy (tree rhs)
+{
+ while (TREE_CODE (rhs) == SSA_NAME && !SSA_NAME_IS_DEFAULT_DEF (rhs))
+ {
+ gimple def_stmt = SSA_NAME_DEF_STMT (rhs);
+
+ if (gimple_assign_single_p (def_stmt))
+ rhs = gimple_assign_rhs1 (def_stmt);
+ else
+ break;
+ }
+ return rhs;
+}
+
+/* Traverse statements from CALL backwards, scanning whether the argument ARG
+ which is a member pointer is filled in with constant values. If it is, fill
+ the jump function JFUNC in appropriately. METHOD_FIELD and DELTA_FIELD are
+ fields of the record type of the member pointer. To give an example, we
+ look for a pattern looking like the following:
+
+ D.2515.__pfn ={v} printStuff;
+ D.2515.__delta ={v} 0;
+ i_1 = doprinting (D.2515); */
+
+static void
+determine_cst_member_ptr (gimple call, tree arg, tree method_field,
+ tree delta_field, struct ipa_jump_func *jfunc)
+{
+ gimple_stmt_iterator gsi;
+ tree method = NULL_TREE;
+ tree delta = NULL_TREE;
+
+ gsi = gsi_for_stmt (call);
+
+ gsi_prev (&gsi);
+ for (; !gsi_end_p (gsi); gsi_prev (&gsi))
+ {
+ gimple stmt = gsi_stmt (gsi);
+ tree lhs, rhs, fld;
+
+ if (!gimple_assign_single_p (stmt))
+ return;
+
+ lhs = gimple_assign_lhs (stmt);
+ rhs = gimple_assign_rhs1 (stmt);
+
+ if (TREE_CODE (lhs) != COMPONENT_REF
+ || TREE_OPERAND (lhs, 0) != arg)
+ continue;
+
+ fld = TREE_OPERAND (lhs, 1);
+ if (!method && fld == method_field)
+ {
+ rhs = get_ssa_def_if_simple_copy (rhs);
+ if (TREE_CODE (rhs) == ADDR_EXPR
+ && TREE_CODE (TREE_OPERAND (rhs, 0)) == FUNCTION_DECL
+ && TREE_CODE (TREE_TYPE (TREE_OPERAND (rhs, 0))) == METHOD_TYPE)
+ {
+ method = TREE_OPERAND (rhs, 0);
+ if (delta)
+ {
+ fill_member_ptr_cst_jump_function (jfunc, rhs, delta);
+ return;
+ }
+ }
+ else
+ return;
+ }
+
+ if (!delta && fld == delta_field)
+ {
+ rhs = get_ssa_def_if_simple_copy (rhs);
+ if (TREE_CODE (rhs) == INTEGER_CST)
+ {
+ delta = rhs;
+ if (method)
+ {
+ fill_member_ptr_cst_jump_function (jfunc, rhs, delta);
+ return;
+ }
+ }
+ else
+ return;
+ }
+ }
+
+ return;
+}
+
+/* Go through the arguments of the CALL and for every member pointer within
+ tries determine whether it is a constant. If it is, create a corresponding
+ constant jump function in FUNCTIONS which is an array of jump functions
+ associated with the call. */
+
+static void
+compute_cst_member_ptr_arguments (struct ipa_jump_func *functions,
+ gimple call)
+{
+ unsigned num;
+ tree arg, method_field, delta_field;
+
+ for (num = 0; num < gimple_call_num_args (call); num++)
+ {
+ arg = gimple_call_arg (call, num);
+
+ if (functions[num].type == IPA_JF_UNKNOWN
+ && type_like_member_ptr_p (TREE_TYPE (arg), &method_field,
+ &delta_field))
+ determine_cst_member_ptr (call, arg, method_field, delta_field,
+ &functions[num]);
+ }
+}
+
+/* Compute jump function for all arguments of callsite CS and insert the
+ information in the jump_functions array in the ipa_edge_args corresponding
+ to this callsite. */
+
+void
+ipa_compute_jump_functions (struct cgraph_edge *cs)
+{
+ struct ipa_node_params *info = IPA_NODE_REF (cs->caller);
+ struct ipa_edge_args *arguments = IPA_EDGE_REF (cs);
+ gimple call;
+
+ if (ipa_get_cs_argument_count (arguments) == 0 || arguments->jump_functions)
+ return;
+ arguments->jump_functions = XCNEWVEC (struct ipa_jump_func,
+ ipa_get_cs_argument_count (arguments));
+
+ call = cs->call_stmt;
+ gcc_assert (is_gimple_call (call));
+
+ /* We will deal with constants and SSA scalars first: */
+ compute_scalar_jump_functions (info, arguments->jump_functions, call);
+
+ /* Let's check whether there are any potential member pointers and if so,
+ whether we can determine their functions as pass_through. */
+ if (!compute_pass_through_member_ptrs (info, arguments->jump_functions, call))
+ return;
+
+ /* Finally, let's check whether we actually pass a new constant member
+ pointer here... */
+ compute_cst_member_ptr_arguments (arguments->jump_functions, call);
+}
+
+/* If RHS looks like a rhs of a statement loading pfn from a member
+ pointer formal parameter, return the parameter, otherwise return
+ NULL. If USE_DELTA, then we look for a use of the delta field
+ rather than the pfn. */
+
+static tree
+ipa_get_member_ptr_load_param (tree rhs, bool use_delta)
+{
+ tree rec, fld;
+ tree ptr_field;
+ tree delta_field;
+
+ if (TREE_CODE (rhs) != COMPONENT_REF)
+ return NULL_TREE;
+
+ rec = TREE_OPERAND (rhs, 0);
+ if (TREE_CODE (rec) != PARM_DECL
+ || !type_like_member_ptr_p (TREE_TYPE (rec), &ptr_field, &delta_field))
+ return NULL_TREE;
+
+ fld = TREE_OPERAND (rhs, 1);
+ if (use_delta ? (fld == delta_field) : (fld == ptr_field))
+ return rec;
+ else
+ return NULL_TREE;
+}
+
+/* If STMT looks like a statement loading a value from a member pointer formal
+ parameter, this function returns that parameter. */
+
+static tree
+ipa_get_stmt_member_ptr_load_param (gimple stmt, bool use_delta)
+{
+ tree rhs;
+
+ if (!gimple_assign_single_p (stmt))
+ return NULL_TREE;
+
+ rhs = gimple_assign_rhs1 (stmt);
+ return ipa_get_member_ptr_load_param (rhs, use_delta);
+}
+
+/* Returns true iff T is an SSA_NAME defined by a statement. */
+
+static bool
+ipa_is_ssa_with_stmt_def (tree t)
+{
+ if (TREE_CODE (t) == SSA_NAME
+ && !SSA_NAME_IS_DEFAULT_DEF (t))
+ return true;
+ else
+ return false;
+}
+
+/* Creates a new note describing a call to a parameter number FORMAL_ID and
+ attaches it to the linked list of INFO. It also sets the called flag of the
+ parameter. STMT is the corresponding call statement. */
+
+static void
+ipa_note_param_call (struct ipa_node_params *info, int formal_id,
+ gimple stmt)
+{
+ struct ipa_param_call_note *note;
+ basic_block bb = gimple_bb (stmt);
+
+ info->params[formal_id].called = 1;
+
+ note = XCNEW (struct ipa_param_call_note);
+ note->formal_id = formal_id;
+ note->stmt = stmt;
+ note->count = bb->count;
+ note->frequency = compute_call_stmt_bb_frequency (current_function_decl, bb);
+
+ note->next = info->param_calls;
+ info->param_calls = note;
+
+ return;
+}
+
+/* Analyze the CALL and examine uses of formal parameters of the caller
+ (described by INFO). Currently it checks whether the call calls a pointer
+ that is a formal parameter and if so, the parameter is marked with the
+ called flag and a note describing the call is created. This is very simple
+ for ordinary pointers represented in SSA but not-so-nice when it comes to
+ member pointers. The ugly part of this function does nothing more than
+ tries to match the pattern of such a call. An example of such a pattern is
+ the gimple dump below, the call is on the last line:
+
+ <bb 2>:
+ f$__delta_5 = f.__delta;
+ f$__pfn_24 = f.__pfn;
+ D.2496_3 = (int) f$__pfn_24;
+ D.2497_4 = D.2496_3 & 1;
+ if (D.2497_4 != 0)
+ goto <bb 3>;
+ else
+ goto <bb 4>;
+
+ <bb 3>:
+ D.2500_7 = (unsigned int) f$__delta_5;
+ D.2501_8 = &S + D.2500_7;
+ D.2502_9 = (int (*__vtbl_ptr_type) (void) * *) D.2501_8;
+ D.2503_10 = *D.2502_9;
+ D.2504_12 = f$__pfn_24 + -1;
+ D.2505_13 = (unsigned int) D.2504_12;
+ D.2506_14 = D.2503_10 + D.2505_13;
+ D.2507_15 = *D.2506_14;
+ iftmp.11_16 = (String:: *) D.2507_15;
+
+ <bb 4>:
+ # iftmp.11_1 = PHI <iftmp.11_16(3), f$__pfn_24(2)>
+ D.2500_19 = (unsigned int) f$__delta_5;
+ D.2508_20 = &S + D.2500_19;
+ D.2493_21 = iftmp.11_1 (D.2508_20, 4);
+
+ Such patterns are results of simple calls to a member pointer:
+
+ int doprinting (int (MyString::* f)(int) const)
+ {
+ MyString S ("somestring");
+
+ return (S.*f)(4);
+ }
+*/
+
+static void
+ipa_analyze_call_uses (struct ipa_node_params *info, gimple call)
+{
+ tree target = gimple_call_fn (call);
+ gimple def;
+ tree var;
+ tree n1, n2;
+ gimple d1, d2;
+ tree rec, rec2, cond;
+ gimple branch;
+ int index;
+ basic_block bb, virt_bb, join;
+
+ if (TREE_CODE (target) != SSA_NAME)
+ return;
+
+ var = SSA_NAME_VAR (target);
+ if (SSA_NAME_IS_DEFAULT_DEF (target))
+ {
+ /* assuming TREE_CODE (var) == PARM_DECL */
+ index = ipa_get_param_decl_index (info, var);
+ if (index >= 0)
+ ipa_note_param_call (info, index, call);
+ return;
+ }
+
+ /* Now we need to try to match the complex pattern of calling a member
+ pointer. */
+
+ if (!POINTER_TYPE_P (TREE_TYPE (target))
+ || TREE_CODE (TREE_TYPE (TREE_TYPE (target))) != METHOD_TYPE)
+ return;
+
+ def = SSA_NAME_DEF_STMT (target);
+ if (gimple_code (def) != GIMPLE_PHI)
+ return;
+
+ if (gimple_phi_num_args (def) != 2)
+ return;
+
+ /* First, we need to check whether one of these is a load from a member
+ pointer that is a parameter to this function. */
+ n1 = PHI_ARG_DEF (def, 0);
+ n2 = PHI_ARG_DEF (def, 1);
+ if (!ipa_is_ssa_with_stmt_def (n1) || !ipa_is_ssa_with_stmt_def (n2))
+ return;
+ d1 = SSA_NAME_DEF_STMT (n1);
+ d2 = SSA_NAME_DEF_STMT (n2);
+
+ if ((rec = ipa_get_stmt_member_ptr_load_param (d1, false)))
+ {
+ if (ipa_get_stmt_member_ptr_load_param (d2, false))
+ return;
+
+ bb = gimple_bb (d1);
+ virt_bb = gimple_bb (d2);
+ }
+ else if ((rec = ipa_get_stmt_member_ptr_load_param (d2, false)))
+ {
+ bb = gimple_bb (d2);
+ virt_bb = gimple_bb (d1);
+ }
+ else
+ return;
+
+ /* Second, we need to check that the basic blocks are laid out in the way
+ corresponding to the pattern. */
+
+ join = gimple_bb (def);
+ if (!single_pred_p (virt_bb) || !single_succ_p (virt_bb)
+ || single_pred (virt_bb) != bb
+ || single_succ (virt_bb) != join)
+ return;
+
+ /* Third, let's see that the branching is done depending on the least
+ significant bit of the pfn. */
+
+ branch = last_stmt (bb);
+ if (gimple_code (branch) != GIMPLE_COND)
+ return;
+
+ if (gimple_cond_code (branch) != NE_EXPR
+ || !integer_zerop (gimple_cond_rhs (branch)))
+ return;
+
+ cond = gimple_cond_lhs (branch);
+ if (!ipa_is_ssa_with_stmt_def (cond))
+ return;
+
+ def = SSA_NAME_DEF_STMT (cond);
+ if (!is_gimple_assign (def)
+ || gimple_assign_rhs_code (def) != BIT_AND_EXPR
+ || !integer_onep (gimple_assign_rhs2 (def)))
+ return;
+
+ cond = gimple_assign_rhs1 (def);
+ if (!ipa_is_ssa_with_stmt_def (cond))
+ return;
+
+ def = SSA_NAME_DEF_STMT (cond);
+
+ if (is_gimple_assign (def)
+ && CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (def)))
+ {
+ cond = gimple_assign_rhs1 (def);
+ if (!ipa_is_ssa_with_stmt_def (cond))
+ return;
+ def = SSA_NAME_DEF_STMT (cond);
+ }
+
+ rec2 = ipa_get_stmt_member_ptr_load_param (def,
+ (TARGET_PTRMEMFUNC_VBIT_LOCATION
+ == ptrmemfunc_vbit_in_delta));
+
+ if (rec != rec2)
+ return;
+
+ index = ipa_get_param_decl_index (info, rec);
+ if (index >= 0 && !ipa_is_param_modified (info, index))
+ ipa_note_param_call (info, index, call);
+
+ return;
+}
+
+/* Analyze the statement STMT with respect to formal parameters (described in
+ INFO) and their uses. Currently it only checks whether formal parameters
+ are called. */
+
+static void
+ipa_analyze_stmt_uses (struct ipa_node_params *info, gimple stmt)
+{
+ if (is_gimple_call (stmt))
+ ipa_analyze_call_uses (info, stmt);
+}
+
+/* Scan the function body of NODE and inspect the uses of formal parameters.
+ Store the findings in various structures of the associated ipa_node_params
+ structure, such as parameter flags, notes etc. */
+
+void
+ipa_analyze_params_uses (struct cgraph_node *node)
+{
+ tree decl = node->decl;
+ basic_block bb;
+ struct function *func;
+ gimple_stmt_iterator gsi;
+ struct ipa_node_params *info = IPA_NODE_REF (node);
+
+ if (ipa_get_param_count (info) == 0 || info->uses_analysis_done)
+ return;
+
+ func = DECL_STRUCT_FUNCTION (decl);
+ FOR_EACH_BB_FN (bb, func)
+ {
+ for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+ {
+ gimple stmt = gsi_stmt (gsi);
+ ipa_analyze_stmt_uses (info, stmt);
+ }
+ }
+
+ info->uses_analysis_done = 1;
}
-/* Check STMT to detect whether a formal is modified within MT, the appropriate
- entry is updated in the modified_flags array of ipa_node_params (associated
- with MT). */
+/* Update the jump functions associated with call graph edge E when the call
+ graph edge CS is being inlined, assuming that E->caller is already (possibly
+ indirectly) inlined into CS->callee and that E has not been inlined.
+
+ We keep pass through functions only if they do not contain any operation.
+ This is sufficient for inlining and greately simplifies things. */
+
static void
-ipa_check_stmt_modifications (struct cgraph_node *mt, tree stmt)
+update_jump_functions_after_inlining (struct cgraph_edge *cs,
+ struct cgraph_edge *e)
{
- int index, j;
- tree parm_decl;
- struct ipa_node_params *info;
+ struct ipa_edge_args *top = IPA_EDGE_REF (cs);
+ struct ipa_edge_args *args = IPA_EDGE_REF (e);
+ int count = ipa_get_cs_argument_count (args);
+ int i;
- switch (TREE_CODE (stmt))
+ for (i = 0; i < count; i++)
{
- case GIMPLE_MODIFY_STMT:
- if (TREE_CODE (GIMPLE_STMT_OPERAND (stmt, 0)) == PARM_DECL)
+ struct ipa_jump_func *src, *dst = ipa_get_ith_jump_func (args, i);
+
+ if (dst->type == IPA_JF_ANCESTOR)
{
- info = IPA_NODE_REF (mt);
- parm_decl = GIMPLE_STMT_OPERAND (stmt, 0);
- index = ipa_get_param_decl_index (info, parm_decl);
- if (index >= 0)
- info->modified_flags[index] = true;
+ dst->type = IPA_JF_UNKNOWN;
+ continue;
}
- break;
- case ASM_EXPR:
- /* Asm code could modify any of the parameters. */
- info = IPA_NODE_REF (mt);
- for (j = 0; j < ipa_get_param_count (IPA_NODE_REF (mt)); j++)
- info->modified_flags[j] = true;
- break;
- default:
- break;
- }
-}
-
-/* The modify computation driver for MT. Compute which formal arguments
- of function MT are locally modified. Formals may be modified in MT
- if their address is taken, or if
- they appear on the left hand side of an assignment. */
-void
-ipa_detect_param_modifications (struct cgraph_node *mt)
-{
- tree decl;
- tree body;
- int j, count;
- basic_block bb;
- struct function *func;
- block_stmt_iterator bsi;
- tree stmt, parm_tree;
- struct ipa_node_params *info = IPA_NODE_REF (mt);
-
- if (ipa_get_param_count (info) == 0 || info->modified_flags)
- return;
- count = ipa_get_param_count (info);
- info->modified_flags = XCNEWVEC (bool, count);
- decl = mt->decl;
- /* ??? Handle pending sizes case. Set all parameters
- of the function to be modified. */
+ if (dst->type != IPA_JF_PASS_THROUGH)
+ continue;
- if (DECL_UNINLINABLE (decl))
- {
- for (j = 0; j < count; j++)
- info->modified_flags[j] = true;
+ /* We must check range due to calls with variable number of arguments and
+ we cannot combine jump functions with operations. */
+ if (dst->value.pass_through.operation != NOP_EXPR
+ || (dst->value.pass_through.formal_id
+ >= ipa_get_cs_argument_count (top)))
+ {
+ dst->type = IPA_JF_UNKNOWN;
+ continue;
+ }
- return;
- }
- /* Formals whose address is taken are considered modified. */
- for (j = 0; j < count; j++)
- {
- parm_tree = ipa_get_ith_param (info, j);
- if (!is_gimple_reg (parm_tree)
- && TREE_ADDRESSABLE (parm_tree))
- info->modified_flags[j] = true;
- }
- body = DECL_SAVED_TREE (decl);
- if (body != NULL)
- {
- func = DECL_STRUCT_FUNCTION (decl);
- FOR_EACH_BB_FN (bb, func)
- {
- for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
- {
- stmt = bsi_stmt (bsi);
- ipa_check_stmt_modifications (mt, stmt);
- }
- }
+ src = ipa_get_ith_jump_func (top, dst->value.pass_through.formal_id);
+ *dst = *src;
}
}
-/* Count number of arguments callsite CS has and store it in
- ipa_edge_args structure corresponding to this callsite. */
-void
-ipa_count_arguments (struct cgraph_edge *cs)
+/* Print out a debug message to file F that we have discovered that an indirect
+ call described by NT is in fact a call of a known constant function described
+ by JFUNC. NODE is the node where the call is. */
+
+static void
+print_edge_addition_message (FILE *f, struct ipa_param_call_note *nt,
+ struct ipa_jump_func *jfunc,
+ struct cgraph_node *node)
{
- tree call_tree;
- int arg_num;
+ fprintf (f, "ipa-prop: Discovered an indirect call to a known target (");
+ if (jfunc->type == IPA_JF_CONST_MEMBER_PTR)
+ {
+ print_node_brief (f, "", jfunc->value.member_cst.pfn, 0);
+ print_node_brief (f, ", ", jfunc->value.member_cst.delta, 0);
+ }
+ else
+ print_node_brief(f, "", jfunc->value.constant, 0);
- call_tree = get_call_expr_in (cs->call_stmt);
- gcc_assert (TREE_CODE (call_tree) == CALL_EXPR);
- arg_num = call_expr_nargs (call_tree);
- ipa_set_cs_argument_count (IPA_EDGE_REF (cs), arg_num);
+ fprintf (f, ") in %s: ", cgraph_node_name (node));
+ print_gimple_stmt (f, nt->stmt, 2, TDF_SLIM);
}
-/* Compute jump function for all arguments of callsite CS
- and insert the information in the jump_functions array
- in the ipa_edge_args corresponding to this callsite. */
-void
-ipa_compute_jump_functions (struct cgraph_edge *cs)
+/* Update the param called notes associated with NODE when CS is being inlined,
+ assuming NODE is (potentially indirectly) inlined into CS->callee.
+ Moreover, if the callee is discovered to be constant, create a new cgraph
+ edge for it. Newly discovered indirect edges will be added to *NEW_EDGES,
+ unless NEW_EDGES is NULL. Return true iff a new edge(s) were created. */
+
+static bool
+update_call_notes_after_inlining (struct cgraph_edge *cs,
+ struct cgraph_node *node,
+ VEC (cgraph_edge_p, heap) **new_edges)
{
- tree call_tree;
- tree arg, cst_decl;
- int arg_num;
- struct cgraph_node *mt;
- tree parm_decl;
- struct function *curr_cfun;
- call_expr_arg_iterator iter;
- struct ipa_edge_args *args = IPA_EDGE_REF (cs);
+ struct ipa_node_params *info = IPA_NODE_REF (node);
+ struct ipa_edge_args *top = IPA_EDGE_REF (cs);
+ struct ipa_param_call_note *nt;
+ bool res = false;
- if (ipa_get_cs_argument_count (args) == 0 || args->jump_functions)
- return;
- args->jump_functions = XCNEWVEC (struct ipa_jump_func,
- ipa_get_cs_argument_count (args));
- call_tree = get_call_expr_in (cs->call_stmt);
- gcc_assert (TREE_CODE (call_tree) == CALL_EXPR);
- arg_num = 0;
-
- FOR_EACH_CALL_EXPR_ARG (arg, iter, call_tree)
- {
- /* If the formal parameter was passed as argument, we store
- IPA_PASS_THROUGH and its index in the caller as the jump function
- of this argument. */
- if ((TREE_CODE (arg) == SSA_NAME
- && TREE_CODE (SSA_NAME_VAR (arg)) == PARM_DECL)
- || TREE_CODE (arg) == PARM_DECL)
+ for (nt = info->param_calls; nt; nt = nt->next)
+ {
+ struct ipa_jump_func *jfunc;
+
+ if (nt->processed)
+ continue;
+
+ /* We must check range due to calls with variable number of arguments: */
+ if (nt->formal_id >= ipa_get_cs_argument_count (top))
{
- struct ipa_node_params *info;
- int index;
-
- mt = cs->caller;
- info = IPA_NODE_REF (mt);
- parm_decl = TREE_CODE (arg) == PARM_DECL ? arg : SSA_NAME_VAR (arg);
-
- index = ipa_get_param_decl_index (info, parm_decl);
- if (TREE_CODE (arg) == SSA_NAME && IS_VALID_JUMP_FUNC_INDEX (index))
- {
- curr_cfun = DECL_STRUCT_FUNCTION (mt->decl);
- if (!gimple_default_def (curr_cfun, parm_decl)
- || gimple_default_def (curr_cfun, parm_decl) != arg)
- info->modified_flags[index] = true;
- }
- if (!IS_VALID_JUMP_FUNC_INDEX (index) || info->modified_flags[index])
- args->jump_functions[arg_num].type = IPA_UNKNOWN;
- else
- {
- args->jump_functions[arg_num].type = IPA_PASS_THROUGH;
- args->jump_functions[arg_num].value.formal_id = index;
- }
+ nt->processed = true;
+ continue;
}
- /* If a constant value was passed as argument,
- we store IPA_CONST and its value as the jump function
- of this argument. */
- else if (TREE_CODE (arg) == INTEGER_CST
- || TREE_CODE (arg) == REAL_CST
- || TREE_CODE (arg) == FIXED_CST)
+
+ jfunc = ipa_get_ith_jump_func (top, nt->formal_id);
+ if (jfunc->type == IPA_JF_PASS_THROUGH
+ && jfunc->value.pass_through.operation == NOP_EXPR)
+ nt->formal_id = jfunc->value.pass_through.formal_id;
+ else if (jfunc->type == IPA_JF_CONST
+ || jfunc->type == IPA_JF_CONST_MEMBER_PTR)
{
- args->jump_functions[arg_num].type = IPA_CONST;
- args->jump_functions[arg_num].value.constant = arg;
+ struct cgraph_node *callee;
+ struct cgraph_edge *new_indirect_edge;
+ tree decl;
+
+ nt->processed = true;
+ if (jfunc->type == IPA_JF_CONST_MEMBER_PTR)
+ decl = jfunc->value.member_cst.pfn;
+ else
+ decl = jfunc->value.constant;
+
+ if (TREE_CODE (decl) != ADDR_EXPR)
+ continue;
+ decl = TREE_OPERAND (decl, 0);
+
+ if (TREE_CODE (decl) != FUNCTION_DECL)
+ continue;
+ callee = cgraph_node (decl);
+ if (!callee || !callee->local.inlinable)
+ continue;
+
+ res = true;
+ if (dump_file)
+ print_edge_addition_message (dump_file, nt, jfunc, node);
+
+ new_indirect_edge = cgraph_create_edge (node, callee, nt->stmt,
+ nt->count, nt->frequency,
+ nt->loop_nest);
+ new_indirect_edge->indirect_call = 1;
+ ipa_check_create_edge_args ();
+ if (new_edges)
+ VEC_safe_push (cgraph_edge_p, heap, *new_edges, new_indirect_edge);
+ top = IPA_EDGE_REF (cs);
}
- /* This is for the case of Fortran. If the address of a const_decl
- was passed as argument then we store
- IPA_CONST_REF/IPA_CONST_REF and the constant
- value as the jump function corresponding to this argument. */
- else if (TREE_CODE (arg) == ADDR_EXPR
- && TREE_CODE (TREE_OPERAND (arg, 0)) == CONST_DECL)
+ else
{
- cst_decl = TREE_OPERAND (arg, 0);
- if (TREE_CODE (DECL_INITIAL (cst_decl)) == INTEGER_CST
- || TREE_CODE (DECL_INITIAL (cst_decl)) == REAL_CST
- || TREE_CODE (DECL_INITIAL (cst_decl)) == FIXED_CST)
- {
- args->jump_functions[arg_num].type = IPA_CONST_REF;
- args->jump_functions[arg_num].value.constant = cst_decl;
- }
+ /* Ancestor jum functions and pass theoughs with operations should
+ not be used on parameters that then get called. */
+ gcc_assert (jfunc->type == IPA_JF_UNKNOWN);
+ nt->processed = true;
}
- else
- args->jump_functions[arg_num].type = IPA_UNKNOWN;
- arg_num++;
}
+ return res;
+}
+
+/* Recursively traverse subtree of NODE (including node) made of inlined
+ cgraph_edges when CS has been inlined and invoke
+ update_call_notes_after_inlining on all nodes and
+ update_jump_functions_after_inlining on all non-inlined edges that lead out
+ of this subtree. Newly discovered indirect edges will be added to
+ *NEW_EDGES, unless NEW_EDGES is NULL. Return true iff a new edge(s) were
+ created. */
+
+static bool
+propagate_info_to_inlined_callees (struct cgraph_edge *cs,
+ struct cgraph_node *node,
+ VEC (cgraph_edge_p, heap) **new_edges)
+{
+ struct cgraph_edge *e;
+ bool res;
+
+ res = update_call_notes_after_inlining (cs, node, new_edges);
+
+ for (e = node->callees; e; e = e->next_callee)
+ if (!e->inline_failed)
+ res |= propagate_info_to_inlined_callees (cs, e->callee, new_edges);
+ else
+ update_jump_functions_after_inlining (cs, e);
+
+ return res;
+}
+
+/* Update jump functions and call note functions on inlining the call site CS.
+ CS is expected to lead to a node already cloned by
+ cgraph_clone_inline_nodes. Newly discovered indirect edges will be added to
+ *NEW_EDGES, unless NEW_EDGES is NULL. Return true iff a new edge(s) were +
+ created. */
+
+bool
+ipa_propagate_indirect_call_infos (struct cgraph_edge *cs,
+ VEC (cgraph_edge_p, heap) **new_edges)
+{
+ /* FIXME lto: We do not stream out indirect call information. */
+ if (flag_wpa)
+ return false;
+
+ /* Do nothing if the preparation phase has not been carried out yet
+ (i.e. during early inlining). */
+ if (!ipa_node_params_vector)
+ return false;
+ gcc_assert (ipa_edge_args_vector);
+
+ return propagate_info_to_inlined_callees (cs, cs->callee, new_edges);
}
/* Frees all dynamically allocated structures that the argument info points
to. */
+
void
ipa_free_edge_args_substructures (struct ipa_edge_args *args)
{
}
/* Free all ipa_edge structures. */
+
void
ipa_free_all_edge_args (void)
{
/* Frees all dynamically allocated structures that the param info points
to. */
+
void
ipa_free_node_params_substructures (struct ipa_node_params *info)
{
- if (info->ipcp_lattices)
- free (info->ipcp_lattices);
- if (info->param_decls)
- free (info->param_decls);
- if (info->modified_flags)
- free (info->modified_flags);
+ if (info->params)
+ free (info->params);
+
+ while (info->param_calls)
+ {
+ struct ipa_param_call_note *note = info->param_calls;
+ info->param_calls = note->next;
+ free (note);
+ }
memset (info, 0, sizeof (*info));
}
/* Free all ipa_node_params structures. */
+
void
ipa_free_all_node_params (void)
{
}
/* Hook that is called by cgraph.c when an edge is removed. */
+
static void
-ipa_edge_removal_hook (struct cgraph_edge *cs,
- void *data __attribute__ ((unused)))
+ipa_edge_removal_hook (struct cgraph_edge *cs, void *data ATTRIBUTE_UNUSED)
{
+ /* During IPA-CP updating we can be called on not-yet analyze clones. */
+ if (VEC_length (ipa_edge_args_t, ipa_edge_args_vector)
+ <= (unsigned)cs->uid)
+ return;
ipa_free_edge_args_substructures (IPA_EDGE_REF (cs));
}
/* Hook that is called by cgraph.c when a node is removed. */
+
static void
-ipa_node_removal_hook (struct cgraph_node *node,
- void *data __attribute__ ((unused)))
+ipa_node_removal_hook (struct cgraph_node *node, void *data ATTRIBUTE_UNUSED)
{
ipa_free_node_params_substructures (IPA_NODE_REF (node));
}
/* Helper function to duplicate an array of size N that is at SRC and store a
pointer to it to DST. Nothing is done if SRC is NULL. */
+
static void *
duplicate_array (void *src, size_t n)
{
}
/* Hook that is called by cgraph.c when a node is duplicated. */
+
static void
ipa_edge_duplication_hook (struct cgraph_edge *src, struct cgraph_edge *dst,
- void *data)
+ __attribute__((unused)) void *data)
{
struct ipa_edge_args *old_args, *new_args;
int arg_count;
new_args->jump_functions = (struct ipa_jump_func *)
duplicate_array (old_args->jump_functions,
sizeof (struct ipa_jump_func) * arg_count);
- data = data; /* Suppressing compiler warning. */
}
/* Hook that is called by cgraph.c when a node is duplicated. */
+
static void
ipa_node_duplication_hook (struct cgraph_node *src, struct cgraph_node *dst,
- void *data)
+ __attribute__((unused)) void *data)
{
struct ipa_node_params *old_info, *new_info;
+ struct ipa_param_call_note *note;
int param_count;
ipa_check_create_node_params ();
param_count = ipa_get_param_count (old_info);
ipa_set_param_count (new_info, param_count);
- new_info->ipcp_lattices = (struct ipcp_lattice *)
- duplicate_array (old_info->ipcp_lattices,
- sizeof (struct ipcp_lattice) * param_count);
- new_info->param_decls = (tree *)
- duplicate_array (old_info->param_decls, sizeof (tree) * param_count);
- new_info->modified_flags = (bool *)
- duplicate_array (old_info->modified_flags, sizeof (bool) * param_count);
-
+ new_info->params = (struct ipa_param_descriptor *)
+ duplicate_array (old_info->params,
+ sizeof (struct ipa_param_descriptor) * param_count);
new_info->ipcp_orig_node = old_info->ipcp_orig_node;
new_info->count_scale = old_info->count_scale;
- data = data; /* Suppressing compiler warning. */
+ for (note = old_info->param_calls; note; note = note->next)
+ {
+ struct ipa_param_call_note *nn;
+
+ nn = (struct ipa_param_call_note *)
+ xcalloc (1, sizeof (struct ipa_param_call_note));
+ memcpy (nn, note, sizeof (struct ipa_param_call_note));
+ nn->next = new_info->param_calls;
+ new_info->param_calls = nn;
+ }
}
/* Register our cgraph hooks if they are not already there. */
+
void
ipa_register_cgraph_hooks (void)
{
}
/* Unregister our cgraph hooks if they are not already there. */
+
static void
ipa_unregister_cgraph_hooks (void)
{
/* Free all ipa_node_params and all ipa_edge_args structures if they are no
longer needed after ipa-cp. */
+
void
free_all_ipa_structures_after_ipa_cp (void)
{
+ if (!flag_indirect_inlining)
+ {
+ ipa_free_all_edge_args ();
+ ipa_free_all_node_params ();
+ ipa_unregister_cgraph_hooks ();
+ }
+}
+
+/* Free all ipa_node_params and all ipa_edge_args structures if they are no
+ longer needed after indirect inlining. */
+
+void
+free_all_ipa_structures_after_iinln (void)
+{
ipa_free_all_edge_args ();
ipa_free_all_node_params ();
ipa_unregister_cgraph_hooks ();
/* Print ipa_tree_map data structures of all functions in the
callgraph to F. */
+
void
-ipa_print_all_tree_maps (FILE * f)
+ipa_print_node_params (FILE * f, struct cgraph_node *node)
{
int i, count;
tree temp;
+ struct ipa_node_params *info;
+
+ if (!node->analyzed)
+ return;
+ info = IPA_NODE_REF (node);
+ fprintf (f, " function %s Trees :: \n", cgraph_node_name (node));
+ count = ipa_get_param_count (info);
+ for (i = 0; i < count; i++)
+ {
+ temp = ipa_get_param (info, i);
+ if (TREE_CODE (temp) == PARM_DECL)
+ fprintf (f, " param %d : %s", i,
+ (DECL_NAME (temp)
+ ? (*lang_hooks.decl_printable_name) (temp, 2)
+ : "(unnamed)"));
+ if (ipa_is_param_modified (info, i))
+ fprintf (f, " modified");
+ if (ipa_is_param_called (info, i))
+ fprintf (f, " called");
+ fprintf (f, "\n");
+ }
+}
+
+/* Print ipa_tree_map data structures of all functions in the
+ callgraph to F. */
+
+void
+ipa_print_all_params (FILE * f)
+{
struct cgraph_node *node;
- fprintf (f, "\nPARAM TREE MAP PRINT\n");
+ fprintf (f, "\nFunction parameters:\n");
for (node = cgraph_nodes; node; node = node->next)
+ ipa_print_node_params (f, node);
+}
+
+/* Return a heap allocated vector containing formal parameters of FNDECL. */
+
+VEC(tree, heap) *
+ipa_get_vector_of_formal_parms (tree fndecl)
+{
+ VEC(tree, heap) *args;
+ int count;
+ tree parm;
+
+ count = count_formal_params_1 (fndecl);
+ args = VEC_alloc (tree, heap, count);
+ for (parm = DECL_ARGUMENTS (fndecl); parm; parm = TREE_CHAIN (parm))
+ VEC_quick_push (tree, args, parm);
+
+ return args;
+}
+
+/* Return a heap allocated vector containing types of formal parameters of
+ function type FNTYPE. */
+
+static inline VEC(tree, heap) *
+get_vector_of_formal_parm_types (tree fntype)
+{
+ VEC(tree, heap) *types;
+ int count = 0;
+ tree t;
+
+ for (t = TYPE_ARG_TYPES (fntype); t; t = TREE_CHAIN (t))
+ count++;
+
+ types = VEC_alloc (tree, heap, count);
+ for (t = TYPE_ARG_TYPES (fntype); t; t = TREE_CHAIN (t))
+ VEC_quick_push (tree, types, TREE_VALUE (t));
+
+ return types;
+}
+
+/* Modify the function declaration FNDECL and its type according to the plan in
+ ADJUSTMENTS. It also sets base fields of individual adjustments structures
+ to reflect the actual parameters being modified which are determined by the
+ base_index field. */
+
+void
+ipa_modify_formal_parameters (tree fndecl, ipa_parm_adjustment_vec adjustments,
+ const char *synth_parm_prefix)
+{
+ VEC(tree, heap) *oparms, *otypes;
+ tree orig_type, new_type = NULL;
+ tree old_arg_types, t, new_arg_types = NULL;
+ tree parm, *link = &DECL_ARGUMENTS (fndecl);
+ int i, len = VEC_length (ipa_parm_adjustment_t, adjustments);
+ tree new_reversed = NULL;
+ bool care_for_types, last_parm_void;
+
+ if (!synth_parm_prefix)
+ synth_parm_prefix = "SYNTH";
+
+ oparms = ipa_get_vector_of_formal_parms (fndecl);
+ orig_type = TREE_TYPE (fndecl);
+ old_arg_types = TYPE_ARG_TYPES (orig_type);
+
+ /* The following test is an ugly hack, some functions simply don't have any
+ arguments in their type. This is probably a bug but well... */
+ care_for_types = (old_arg_types != NULL_TREE);
+ if (care_for_types)
+ {
+ last_parm_void = (TREE_VALUE (tree_last (old_arg_types))
+ == void_type_node);
+ otypes = get_vector_of_formal_parm_types (orig_type);
+ if (last_parm_void)
+ gcc_assert (VEC_length (tree, oparms) + 1 == VEC_length (tree, otypes));
+ else
+ gcc_assert (VEC_length (tree, oparms) == VEC_length (tree, otypes));
+ }
+ else
{
- struct ipa_node_params *info;
+ last_parm_void = false;
+ otypes = NULL;
+ }
- if (!node->analyzed)
- continue;
- info = IPA_NODE_REF (node);
- fprintf (f, "function %s Trees :: \n", cgraph_node_name (node));
- count = ipa_get_param_count (info);
- for (i = 0; i < count; i++)
+ for (i = 0; i < len; i++)
+ {
+ struct ipa_parm_adjustment *adj;
+ gcc_assert (link);
+
+ adj = VEC_index (ipa_parm_adjustment_t, adjustments, i);
+ parm = VEC_index (tree, oparms, adj->base_index);
+ adj->base = parm;
+
+ if (adj->copy_param)
+ {
+ if (care_for_types)
+ new_arg_types = tree_cons (NULL_TREE, VEC_index (tree, otypes,
+ adj->base_index),
+ new_arg_types);
+ *link = parm;
+ link = &TREE_CHAIN (parm);
+ }
+ else if (!adj->remove_param)
+ {
+ tree new_parm;
+ tree ptype;
+
+ if (adj->by_ref)
+ ptype = build_pointer_type (adj->type);
+ else
+ ptype = adj->type;
+
+ if (care_for_types)
+ new_arg_types = tree_cons (NULL_TREE, ptype, new_arg_types);
+
+ new_parm = build_decl (UNKNOWN_LOCATION, PARM_DECL, NULL_TREE,
+ ptype);
+ DECL_NAME (new_parm) = create_tmp_var_name (synth_parm_prefix);
+
+ DECL_ARTIFICIAL (new_parm) = 1;
+ DECL_ARG_TYPE (new_parm) = ptype;
+ DECL_CONTEXT (new_parm) = fndecl;
+ TREE_USED (new_parm) = 1;
+ DECL_IGNORED_P (new_parm) = 1;
+ layout_decl (new_parm, 0);
+
+ add_referenced_var (new_parm);
+ mark_sym_for_renaming (new_parm);
+ adj->base = parm;
+ adj->reduction = new_parm;
+
+ *link = new_parm;
+
+ link = &TREE_CHAIN (new_parm);
+ }
+ }
+
+ *link = NULL_TREE;
+
+ if (care_for_types)
+ {
+ new_reversed = nreverse (new_arg_types);
+ if (last_parm_void)
{
- temp = ipa_get_ith_param (info, i);
- if (TREE_CODE (temp) == PARM_DECL)
- fprintf (f, " param [%d] : %s\n", i,
- (*lang_hooks.decl_printable_name) (temp, 2));
+ if (new_reversed)
+ TREE_CHAIN (new_arg_types) = void_list_node;
+ else
+ new_reversed = void_list_node;
}
+ }
+
+ /* Use copy_node to preserve as much as possible from original type
+ (debug info, attribute lists etc.)
+ Exception is METHOD_TYPEs must have THIS argument.
+ When we are asked to remove it, we need to build new FUNCTION_TYPE
+ instead. */
+ if (TREE_CODE (orig_type) != METHOD_TYPE
+ || (VEC_index (ipa_parm_adjustment_t, adjustments, 0)->copy_param
+ && VEC_index (ipa_parm_adjustment_t, adjustments, 0)->base_index == 0))
+ {
+ new_type = copy_node (orig_type);
+ TYPE_ARG_TYPES (new_type) = new_reversed;
+ }
+ else
+ {
+ new_type
+ = build_distinct_type_copy (build_function_type (TREE_TYPE (orig_type),
+ new_reversed));
+ TYPE_CONTEXT (new_type) = TYPE_CONTEXT (orig_type);
+ DECL_VINDEX (fndecl) = NULL_TREE;
+ }
+ /* This is a new type, not a copy of an old type. Need to reassociate
+ variants. We can handle everything except the main variant lazily. */
+ t = TYPE_MAIN_VARIANT (orig_type);
+ if (orig_type != t)
+ {
+ TYPE_MAIN_VARIANT (new_type) = t;
+ TYPE_NEXT_VARIANT (new_type) = TYPE_NEXT_VARIANT (t);
+ TYPE_NEXT_VARIANT (t) = new_type;
}
+ else
+ {
+ TYPE_MAIN_VARIANT (new_type) = new_type;
+ TYPE_NEXT_VARIANT (new_type) = NULL;
+ }
+
+ TREE_TYPE (fndecl) = new_type;
+ if (otypes)
+ VEC_free (tree, heap, otypes);
+ VEC_free (tree, heap, oparms);
}
-/* Print modified_flags data structures of all functions in the
- callgraph to F. */
+/* Modify actual arguments of a function call CS as indicated in ADJUSTMENTS.
+ If this is a directly recursive call, CS must be NULL. Otherwise it must
+ contain the corresponding call graph edge. */
+
void
-ipa_print_all_params_modified (FILE * f)
+ipa_modify_call_arguments (struct cgraph_edge *cs, gimple stmt,
+ ipa_parm_adjustment_vec adjustments)
{
- int i, count;
- bool temp;
- struct cgraph_node *node;
+ VEC(tree, heap) *vargs;
+ gimple new_stmt;
+ gimple_stmt_iterator gsi;
+ tree callee_decl;
+ int i, len;
- fprintf (f, "\nMODIFY PRINT\n");
- for (node = cgraph_nodes; node; node = node->next)
+ len = VEC_length (ipa_parm_adjustment_t, adjustments);
+ vargs = VEC_alloc (tree, heap, len);
+
+ gsi = gsi_for_stmt (stmt);
+ for (i = 0; i < len; i++)
{
- struct ipa_node_params *info;
+ struct ipa_parm_adjustment *adj;
- if (!node->analyzed)
- continue;
- info = IPA_NODE_REF (node);
- fprintf (f, "function %s :: \n", cgraph_node_name (node));
- count = ipa_get_param_count (info);
- for (i = 0; i < count; i++)
+ adj = VEC_index (ipa_parm_adjustment_t, adjustments, i);
+
+ if (adj->copy_param)
+ {
+ tree arg = gimple_call_arg (stmt, adj->base_index);
+
+ VEC_quick_push (tree, vargs, arg);
+ }
+ else if (!adj->remove_param)
+ {
+ tree expr, orig_expr;
+ bool allow_ptr, repl_found;
+
+ orig_expr = expr = gimple_call_arg (stmt, adj->base_index);
+ if (TREE_CODE (expr) == ADDR_EXPR)
+ {
+ allow_ptr = false;
+ expr = TREE_OPERAND (expr, 0);
+ }
+ else
+ allow_ptr = true;
+
+ repl_found = build_ref_for_offset (&expr, TREE_TYPE (expr),
+ adj->offset, adj->type,
+ allow_ptr);
+ if (repl_found)
+ {
+ if (adj->by_ref)
+ expr = build_fold_addr_expr (expr);
+ }
+ else
+ {
+ tree ptrtype = build_pointer_type (adj->type);
+ expr = orig_expr;
+ if (!POINTER_TYPE_P (TREE_TYPE (expr)))
+ expr = build_fold_addr_expr (expr);
+ if (!useless_type_conversion_p (ptrtype, TREE_TYPE (expr)))
+ expr = fold_convert (ptrtype, expr);
+ expr = fold_build2 (POINTER_PLUS_EXPR, ptrtype, expr,
+ build_int_cst (size_type_node,
+ adj->offset / BITS_PER_UNIT));
+ if (!adj->by_ref)
+ expr = fold_build1 (INDIRECT_REF, adj->type, expr);
+ }
+ expr = force_gimple_operand_gsi (&gsi, expr,
+ adj->by_ref
+ || is_gimple_reg_type (adj->type),
+ NULL, true, GSI_SAME_STMT);
+ VEC_quick_push (tree, vargs, expr);
+ }
+ }
+
+ if (dump_file && (dump_flags & TDF_DETAILS))
+ {
+ fprintf (dump_file, "replacing stmt:");
+ print_gimple_stmt (dump_file, gsi_stmt (gsi), 0, 0);
+ }
+
+ callee_decl = !cs ? gimple_call_fndecl (stmt) : cs->callee->decl;
+ new_stmt = gimple_build_call_vec (callee_decl, vargs);
+ VEC_free (tree, heap, vargs);
+ if (gimple_call_lhs (stmt))
+ gimple_call_set_lhs (new_stmt, gimple_call_lhs (stmt));
+
+ gimple_set_block (new_stmt, gimple_block (stmt));
+ if (gimple_has_location (stmt))
+ gimple_set_location (new_stmt, gimple_location (stmt));
+ gimple_call_copy_flags (new_stmt, stmt);
+ gimple_call_set_chain (new_stmt, gimple_call_chain (stmt));
+
+ if (dump_file && (dump_flags & TDF_DETAILS))
+ {
+ fprintf (dump_file, "with stmt:");
+ print_gimple_stmt (dump_file, new_stmt, 0, 0);
+ fprintf (dump_file, "\n");
+ }
+ gsi_replace (&gsi, new_stmt, true);
+ if (cs)
+ cgraph_set_call_stmt (cs, new_stmt);
+ update_ssa (TODO_update_ssa);
+ free_dominance_info (CDI_DOMINATORS);
+}
+
+/* Return true iff BASE_INDEX is in ADJUSTMENTS more than once. */
+
+static bool
+index_in_adjustments_multiple_times_p (int base_index,
+ ipa_parm_adjustment_vec adjustments)
+{
+ int i, len = VEC_length (ipa_parm_adjustment_t, adjustments);
+ bool one = false;
+
+ for (i = 0; i < len; i++)
+ {
+ struct ipa_parm_adjustment *adj;
+ adj = VEC_index (ipa_parm_adjustment_t, adjustments, i);
+
+ if (adj->base_index == base_index)
{
- temp = info->modified_flags[i];
- if (temp)
- fprintf (f, " param [%d] true \n", i);
+ if (one)
+ return true;
else
- fprintf (f, " param [%d] false \n", i);
+ one = true;
+ }
+ }
+ return false;
+}
+
+
+/* Return adjustments that should have the same effect on function parameters
+ and call arguments as if they were first changed according to adjustments in
+ INNER and then by adjustments in OUTER. */
+
+ipa_parm_adjustment_vec
+ipa_combine_adjustments (ipa_parm_adjustment_vec inner,
+ ipa_parm_adjustment_vec outer)
+{
+ int i, outlen = VEC_length (ipa_parm_adjustment_t, outer);
+ int inlen = VEC_length (ipa_parm_adjustment_t, inner);
+ int removals = 0;
+ ipa_parm_adjustment_vec adjustments, tmp;
+
+ tmp = VEC_alloc (ipa_parm_adjustment_t, heap, inlen);
+ for (i = 0; i < inlen; i++)
+ {
+ struct ipa_parm_adjustment *n;
+ n = VEC_index (ipa_parm_adjustment_t, inner, i);
+
+ if (n->remove_param)
+ removals++;
+ else
+ VEC_quick_push (ipa_parm_adjustment_t, tmp, n);
+ }
+
+ adjustments = VEC_alloc (ipa_parm_adjustment_t, heap, outlen + removals);
+ for (i = 0; i < outlen; i++)
+ {
+ struct ipa_parm_adjustment *r;
+ struct ipa_parm_adjustment *out = VEC_index (ipa_parm_adjustment_t,
+ outer, i);
+ struct ipa_parm_adjustment *in = VEC_index (ipa_parm_adjustment_t, tmp,
+ out->base_index);
+
+ gcc_assert (!in->remove_param);
+ if (out->remove_param)
+ {
+ if (!index_in_adjustments_multiple_times_p (in->base_index, tmp))
+ {
+ r = VEC_quick_push (ipa_parm_adjustment_t, adjustments, NULL);
+ memset (r, 0, sizeof (*r));
+ r->remove_param = true;
+ }
+ continue;
+ }
+
+ r = VEC_quick_push (ipa_parm_adjustment_t, adjustments, NULL);
+ memset (r, 0, sizeof (*r));
+ r->base_index = in->base_index;
+ r->type = out->type;
+
+ /* FIXME: Create nonlocal value too. */
+
+ if (in->copy_param && out->copy_param)
+ r->copy_param = true;
+ else if (in->copy_param)
+ r->offset = out->offset;
+ else if (out->copy_param)
+ r->offset = in->offset;
+ else
+ r->offset = in->offset + out->offset;
+ }
+
+ for (i = 0; i < inlen; i++)
+ {
+ struct ipa_parm_adjustment *n = VEC_index (ipa_parm_adjustment_t,
+ inner, i);
+
+ if (n->remove_param)
+ VEC_quick_push (ipa_parm_adjustment_t, adjustments, n);
+ }
+
+ VEC_free (ipa_parm_adjustment_t, heap, tmp);
+ return adjustments;
+}
+
+/* Dump the adjustments in the vector ADJUSTMENTS to dump_file in a human
+ friendly way, assuming they are meant to be applied to FNDECL. */
+
+void
+ipa_dump_param_adjustments (FILE *file, ipa_parm_adjustment_vec adjustments,
+ tree fndecl)
+{
+ int i, len = VEC_length (ipa_parm_adjustment_t, adjustments);
+ bool first = true;
+ VEC(tree, heap) *parms = ipa_get_vector_of_formal_parms (fndecl);
+
+ fprintf (file, "IPA param adjustments: ");
+ for (i = 0; i < len; i++)
+ {
+ struct ipa_parm_adjustment *adj;
+ adj = VEC_index (ipa_parm_adjustment_t, adjustments, i);
+
+ if (!first)
+ fprintf (file, " ");
+ else
+ first = false;
+
+ fprintf (file, "%i. base_index: %i - ", i, adj->base_index);
+ print_generic_expr (file, VEC_index (tree, parms, adj->base_index), 0);
+ if (adj->base)
+ {
+ fprintf (file, ", base: ");
+ print_generic_expr (file, adj->base, 0);
+ }
+ if (adj->reduction)
+ {
+ fprintf (file, ", reduction: ");
+ print_generic_expr (file, adj->reduction, 0);
}
+ if (adj->new_ssa_base)
+ {
+ fprintf (file, ", new_ssa_base: ");
+ print_generic_expr (file, adj->new_ssa_base, 0);
+ }
+
+ if (adj->copy_param)
+ fprintf (file, ", copy_param");
+ else if (adj->remove_param)
+ fprintf (file, ", remove_param");
+ else
+ fprintf (file, ", offset %li", (long) adj->offset);
+ if (adj->by_ref)
+ fprintf (file, ", by_ref");
+ print_node_brief (file, ", type: ", adj->type, 0);
+ fprintf (file, "\n");
}
+ VEC_free (tree, heap, parms);
}
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