/* Calculate branch probabilities, and basic block execution counts.
- Copyright (C) 1990-2015 Free Software Foundation, Inc.
+ Copyright (C) 1990-2019 Free Software Foundation, Inc.
Contributed by James E. Wilson, UC Berkeley/Cygnus Support;
based on some ideas from Dain Samples of UC Berkeley.
Further mangling by Bob Manson, Cygnus Support.
#include "config.h"
#include "system.h"
#include "coretypes.h"
+#include "memmodel.h"
#include "backend.h"
#include "target.h"
#include "tree.h"
#include "cgraph.h"
#include "coverage.h"
#include "diagnostic-core.h"
-#include "flags.h"
-#include "alias.h"
#include "fold-const.h"
-#include "internal-fn.h"
#include "varasm.h"
#include "tree-nested.h"
#include "gimplify.h"
#include "profile.h"
#include "tree-cfgcleanup.h"
#include "params.h"
+#include "stringpool.h"
+#include "attribs.h"
+#include "tree-pretty-print.h"
+#include "langhooks.h"
+#include "stor-layout.h"
+#include "xregex.h"
static GTY(()) tree gcov_type_node;
static GTY(()) tree tree_interval_profiler_fn;
static GTY(()) tree tree_pow2_profiler_fn;
-static GTY(()) tree tree_one_value_profiler_fn;
+static GTY(()) tree tree_topn_values_profiler_fn;
static GTY(()) tree tree_indirect_call_profiler_fn;
-static GTY(()) tree tree_time_profiler_fn;
static GTY(()) tree tree_average_profiler_fn;
static GTY(()) tree tree_ior_profiler_fn;
+static GTY(()) tree tree_time_profiler_counter;
-static GTY(()) tree ic_void_ptr_var;
-static GTY(()) tree ic_gcov_type_ptr_var;
-static GTY(()) tree ptr_void;
+static GTY(()) tree ic_tuple_var;
+static GTY(()) tree ic_tuple_counters_field;
+static GTY(()) tree ic_tuple_callee_field;
/* Do initialization work for the edge profiler. */
static void
init_ic_make_global_vars (void)
{
- tree gcov_type_ptr;
+ tree gcov_type_ptr;
- ptr_void = build_pointer_type (void_type_node);
+ gcov_type_ptr = build_pointer_type (get_gcov_type ());
- ic_void_ptr_var
- = build_decl (UNKNOWN_LOCATION, VAR_DECL,
- get_identifier (
- (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) ?
- "__gcov_indirect_call_topn_callee" :
- "__gcov_indirect_call_callee")),
- ptr_void);
- TREE_PUBLIC (ic_void_ptr_var) = 1;
- DECL_EXTERNAL (ic_void_ptr_var) = 1;
- TREE_STATIC (ic_void_ptr_var) = 1;
- DECL_ARTIFICIAL (ic_void_ptr_var) = 1;
- DECL_INITIAL (ic_void_ptr_var) = NULL;
- if (targetm.have_tls)
- set_decl_tls_model (ic_void_ptr_var, decl_default_tls_model (ic_void_ptr_var));
+ tree tuple_type = lang_hooks.types.make_type (RECORD_TYPE);
- varpool_node::finalize_decl (ic_void_ptr_var);
+ /* callee */
+ ic_tuple_callee_field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
+ ptr_type_node);
- gcov_type_ptr = build_pointer_type (get_gcov_type ());
+ /* counters */
+ ic_tuple_counters_field = build_decl (BUILTINS_LOCATION, FIELD_DECL,
+ NULL_TREE, gcov_type_ptr);
+ DECL_CHAIN (ic_tuple_counters_field) = ic_tuple_callee_field;
+
+ finish_builtin_struct (tuple_type, "indirect_call_tuple",
+ ic_tuple_counters_field, NULL_TREE);
- ic_gcov_type_ptr_var
+ ic_tuple_var
= build_decl (UNKNOWN_LOCATION, VAR_DECL,
- get_identifier (
- (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) ?
- "__gcov_indirect_call_topn_counters" :
- "__gcov_indirect_call_counters")),
- gcov_type_ptr);
- TREE_PUBLIC (ic_gcov_type_ptr_var) = 1;
- DECL_EXTERNAL (ic_gcov_type_ptr_var) = 1;
- TREE_STATIC (ic_gcov_type_ptr_var) = 1;
- DECL_ARTIFICIAL (ic_gcov_type_ptr_var) = 1;
- DECL_INITIAL (ic_gcov_type_ptr_var) = NULL;
+ get_identifier ("__gcov_indirect_call"), tuple_type);
+ TREE_PUBLIC (ic_tuple_var) = 1;
+ DECL_ARTIFICIAL (ic_tuple_var) = 1;
+ DECL_INITIAL (ic_tuple_var) = NULL;
+ DECL_EXTERNAL (ic_tuple_var) = 1;
if (targetm.have_tls)
- set_decl_tls_model (ic_gcov_type_ptr_var, decl_default_tls_model (ic_gcov_type_ptr_var));
-
- varpool_node::finalize_decl (ic_gcov_type_ptr_var);
+ set_decl_tls_model (ic_tuple_var, decl_default_tls_model (ic_tuple_var));
}
/* Create the type and function decls for the interface with gcov. */
void
-gimple_init_edge_profiler (void)
+gimple_init_gcov_profiler (void)
{
tree interval_profiler_fn_type;
tree pow2_profiler_fn_type;
- tree one_value_profiler_fn_type;
+ tree topn_values_profiler_fn_type;
tree gcov_type_ptr;
tree ic_profiler_fn_type;
tree average_profiler_fn_type;
- tree time_profiler_fn_type;
+ const char *profiler_fn_name;
+ const char *fn_name;
if (!gcov_type_node)
{
+ const char *fn_suffix
+ = flag_profile_update == PROFILE_UPDATE_ATOMIC ? "_atomic" : "";
+
gcov_type_node = get_gcov_type ();
gcov_type_ptr = build_pointer_type (gcov_type_node);
gcov_type_ptr, gcov_type_node,
integer_type_node,
unsigned_type_node, NULL_TREE);
- tree_interval_profiler_fn
- = build_fn_decl ("__gcov_interval_profiler",
- interval_profiler_fn_type);
+ fn_name = concat ("__gcov_interval_profiler", fn_suffix, NULL);
+ tree_interval_profiler_fn = build_fn_decl (fn_name,
+ interval_profiler_fn_type);
+ free (CONST_CAST (char *, fn_name));
TREE_NOTHROW (tree_interval_profiler_fn) = 1;
DECL_ATTRIBUTES (tree_interval_profiler_fn)
= tree_cons (get_identifier ("leaf"), NULL,
= build_function_type_list (void_type_node,
gcov_type_ptr, gcov_type_node,
NULL_TREE);
- tree_pow2_profiler_fn = build_fn_decl ("__gcov_pow2_profiler",
- pow2_profiler_fn_type);
+ fn_name = concat ("__gcov_pow2_profiler", fn_suffix, NULL);
+ tree_pow2_profiler_fn = build_fn_decl (fn_name, pow2_profiler_fn_type);
+ free (CONST_CAST (char *, fn_name));
TREE_NOTHROW (tree_pow2_profiler_fn) = 1;
DECL_ATTRIBUTES (tree_pow2_profiler_fn)
= tree_cons (get_identifier ("leaf"), NULL,
DECL_ATTRIBUTES (tree_pow2_profiler_fn));
/* void (*) (gcov_type *, gcov_type) */
- one_value_profiler_fn_type
+ topn_values_profiler_fn_type
= build_function_type_list (void_type_node,
gcov_type_ptr, gcov_type_node,
NULL_TREE);
- tree_one_value_profiler_fn
- = build_fn_decl ("__gcov_one_value_profiler",
- one_value_profiler_fn_type);
- TREE_NOTHROW (tree_one_value_profiler_fn) = 1;
- DECL_ATTRIBUTES (tree_one_value_profiler_fn)
+ fn_name = concat ("__gcov_topn_values_profiler", fn_suffix, NULL);
+ tree_topn_values_profiler_fn
+ = build_fn_decl (fn_name, topn_values_profiler_fn_type);
+
+ TREE_NOTHROW (tree_topn_values_profiler_fn) = 1;
+ DECL_ATTRIBUTES (tree_topn_values_profiler_fn)
= tree_cons (get_identifier ("leaf"), NULL,
- DECL_ATTRIBUTES (tree_one_value_profiler_fn));
+ DECL_ATTRIBUTES (tree_topn_values_profiler_fn));
init_ic_make_global_vars ();
ic_profiler_fn_type
= build_function_type_list (void_type_node,
gcov_type_node,
- ptr_void,
+ ptr_type_node,
NULL_TREE);
+ profiler_fn_name = "__gcov_indirect_call_profiler_v4";
+
tree_indirect_call_profiler_fn
- = build_fn_decl ( (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) ?
- "__gcov_indirect_call_topn_profiler":
- "__gcov_indirect_call_profiler_v2"),
- ic_profiler_fn_type);
+ = build_fn_decl (profiler_fn_name, ic_profiler_fn_type);
TREE_NOTHROW (tree_indirect_call_profiler_fn) = 1;
DECL_ATTRIBUTES (tree_indirect_call_profiler_fn)
= tree_cons (get_identifier ("leaf"), NULL,
DECL_ATTRIBUTES (tree_indirect_call_profiler_fn));
- /* void (*) (gcov_type *, gcov_type, void *) */
- time_profiler_fn_type
- = build_function_type_list (void_type_node,
- gcov_type_ptr, NULL_TREE);
- tree_time_profiler_fn
- = build_fn_decl ("__gcov_time_profiler",
- time_profiler_fn_type);
- TREE_NOTHROW (tree_time_profiler_fn) = 1;
- DECL_ATTRIBUTES (tree_time_profiler_fn)
- = tree_cons (get_identifier ("leaf"), NULL,
- DECL_ATTRIBUTES (tree_time_profiler_fn));
+ tree_time_profiler_counter
+ = build_decl (UNKNOWN_LOCATION, VAR_DECL,
+ get_identifier ("__gcov_time_profiler_counter"),
+ get_gcov_type ());
+ TREE_PUBLIC (tree_time_profiler_counter) = 1;
+ DECL_EXTERNAL (tree_time_profiler_counter) = 1;
+ TREE_STATIC (tree_time_profiler_counter) = 1;
+ DECL_ARTIFICIAL (tree_time_profiler_counter) = 1;
+ DECL_INITIAL (tree_time_profiler_counter) = NULL;
/* void (*) (gcov_type *, gcov_type) */
average_profiler_fn_type
= build_function_type_list (void_type_node,
gcov_type_ptr, gcov_type_node, NULL_TREE);
- tree_average_profiler_fn
- = build_fn_decl ("__gcov_average_profiler",
- average_profiler_fn_type);
+ fn_name = concat ("__gcov_average_profiler", fn_suffix, NULL);
+ tree_average_profiler_fn = build_fn_decl (fn_name,
+ average_profiler_fn_type);
+ free (CONST_CAST (char *, fn_name));
TREE_NOTHROW (tree_average_profiler_fn) = 1;
DECL_ATTRIBUTES (tree_average_profiler_fn)
= tree_cons (get_identifier ("leaf"), NULL,
DECL_ATTRIBUTES (tree_average_profiler_fn));
- tree_ior_profiler_fn
- = build_fn_decl ("__gcov_ior_profiler",
- average_profiler_fn_type);
+ fn_name = concat ("__gcov_ior_profiler", fn_suffix, NULL);
+ tree_ior_profiler_fn = build_fn_decl (fn_name, average_profiler_fn_type);
+ free (CONST_CAST (char *, fn_name));
TREE_NOTHROW (tree_ior_profiler_fn) = 1;
DECL_ATTRIBUTES (tree_ior_profiler_fn)
= tree_cons (get_identifier ("leaf"), NULL,
late, we need to initialize them by hand. */
DECL_ASSEMBLER_NAME (tree_interval_profiler_fn);
DECL_ASSEMBLER_NAME (tree_pow2_profiler_fn);
- DECL_ASSEMBLER_NAME (tree_one_value_profiler_fn);
+ DECL_ASSEMBLER_NAME (tree_topn_values_profiler_fn);
DECL_ASSEMBLER_NAME (tree_indirect_call_profiler_fn);
- DECL_ASSEMBLER_NAME (tree_time_profiler_fn);
DECL_ASSEMBLER_NAME (tree_average_profiler_fn);
DECL_ASSEMBLER_NAME (tree_ior_profiler_fn);
}
void
gimple_gen_edge_profiler (int edgeno, edge e)
{
- tree ref, one, gcov_type_tmp_var;
- gassign *stmt1, *stmt2, *stmt3;
+ tree one;
- ref = tree_coverage_counter_ref (GCOV_COUNTER_ARCS, edgeno);
one = build_int_cst (gcov_type_node, 1);
- gcov_type_tmp_var = make_temp_ssa_name (gcov_type_node,
- NULL, "PROF_edge_counter");
- stmt1 = gimple_build_assign (gcov_type_tmp_var, ref);
- gcov_type_tmp_var = make_temp_ssa_name (gcov_type_node,
- NULL, "PROF_edge_counter");
- stmt2 = gimple_build_assign (gcov_type_tmp_var, PLUS_EXPR,
- gimple_assign_lhs (stmt1), one);
- stmt3 = gimple_build_assign (unshare_expr (ref), gimple_assign_lhs (stmt2));
- gsi_insert_on_edge (e, stmt1);
- gsi_insert_on_edge (e, stmt2);
- gsi_insert_on_edge (e, stmt3);
+
+ if (flag_profile_update == PROFILE_UPDATE_ATOMIC)
+ {
+ /* __atomic_fetch_add (&counter, 1, MEMMODEL_RELAXED); */
+ tree addr = tree_coverage_counter_addr (GCOV_COUNTER_ARCS, edgeno);
+ tree f = builtin_decl_explicit (LONG_LONG_TYPE_SIZE > 32
+ ? BUILT_IN_ATOMIC_FETCH_ADD_8:
+ BUILT_IN_ATOMIC_FETCH_ADD_4);
+ gcall *stmt = gimple_build_call (f, 3, addr, one,
+ build_int_cst (integer_type_node,
+ MEMMODEL_RELAXED));
+ gsi_insert_on_edge (e, stmt);
+ }
+ else
+ {
+ tree ref = tree_coverage_counter_ref (GCOV_COUNTER_ARCS, edgeno);
+ tree gcov_type_tmp_var = make_temp_ssa_name (gcov_type_node,
+ NULL, "PROF_edge_counter");
+ gassign *stmt1 = gimple_build_assign (gcov_type_tmp_var, ref);
+ gcov_type_tmp_var = make_temp_ssa_name (gcov_type_node,
+ NULL, "PROF_edge_counter");
+ gassign *stmt2 = gimple_build_assign (gcov_type_tmp_var, PLUS_EXPR,
+ gimple_assign_lhs (stmt1), one);
+ gassign *stmt3 = gimple_build_assign (unshare_expr (ref),
+ gimple_assign_lhs (stmt2));
+ gsi_insert_on_edge (e, stmt1);
+ gsi_insert_on_edge (e, stmt2);
+ gsi_insert_on_edge (e, stmt3);
+ }
}
/* Emits code to get VALUE to instrument at GSI, and returns the
tag of the section for counters, BASE is offset of the counter position. */
void
-gimple_gen_interval_profiler (histogram_value value, unsigned tag, unsigned base)
+gimple_gen_interval_profiler (histogram_value value, unsigned tag)
{
gimple *stmt = value->hvalue.stmt;
gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
- tree ref = tree_coverage_counter_ref (tag, base), ref_ptr;
+ tree ref = tree_coverage_counter_ref (tag, 0), ref_ptr;
gcall *call;
tree val;
tree start = build_int_cst_type (integer_type_node,
/* Output instructions as GIMPLE trees to increment the power of two histogram
counter. VALUE is the expression whose value is profiled. TAG is the tag
- of the section for counters, BASE is offset of the counter position. */
+ of the section for counters. */
void
-gimple_gen_pow2_profiler (histogram_value value, unsigned tag, unsigned base)
+gimple_gen_pow2_profiler (histogram_value value, unsigned tag)
{
gimple *stmt = value->hvalue.stmt;
gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
- tree ref_ptr = tree_coverage_counter_addr (tag, base);
+ tree ref_ptr = tree_coverage_counter_addr (tag, 0);
gcall *call;
tree val;
gsi_insert_before (&gsi, call, GSI_NEW_STMT);
}
-/* Output instructions as GIMPLE trees for code to find the most common value.
- VALUE is the expression whose value is profiled. TAG is the tag of the
- section for counters, BASE is offset of the counter position. */
+/* Output instructions as GIMPLE trees for code to find the most N common
+ values. VALUE is the expression whose value is profiled. TAG is the tag
+ of the section for counters. */
void
-gimple_gen_one_value_profiler (histogram_value value, unsigned tag, unsigned base)
+gimple_gen_topn_values_profiler (histogram_value value, unsigned tag)
{
gimple *stmt = value->hvalue.stmt;
gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
- tree ref_ptr = tree_coverage_counter_addr (tag, base);
+ tree ref_ptr = tree_coverage_counter_addr (tag, 0);
gcall *call;
tree val;
ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr,
true, NULL_TREE, true, GSI_SAME_STMT);
val = prepare_instrumented_value (&gsi, value);
- call = gimple_build_call (tree_one_value_profiler_fn, 2, ref_ptr, val);
+ call = gimple_build_call (tree_topn_values_profiler_fn, 2, ref_ptr, val);
gsi_insert_before (&gsi, call, GSI_NEW_STMT);
}
/* Output instructions as GIMPLE trees for code to find the most
common called function in indirect call.
VALUE is the call expression whose indirect callee is profiled.
- TAG is the tag of the section for counters, BASE is offset of the
- counter position. */
+ TAG is the tag of the section for counters. */
void
-gimple_gen_ic_profiler (histogram_value value, unsigned tag, unsigned base)
+gimple_gen_ic_profiler (histogram_value value, unsigned tag)
{
tree tmp1;
gassign *stmt1, *stmt2, *stmt3;
gimple *stmt = value->hvalue.stmt;
gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
- tree ref_ptr = tree_coverage_counter_addr (tag, base);
-
- if ( (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) &&
- tag == GCOV_COUNTER_V_INDIR) ||
- (!PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) &&
- tag == GCOV_COUNTER_ICALL_TOPNV))
- return;
+ tree ref_ptr = tree_coverage_counter_addr (tag, 0);
ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr,
true, NULL_TREE, true, GSI_SAME_STMT);
/* Insert code:
- stmt1: __gcov_indirect_call_counters = get_relevant_counter_ptr ();
+ stmt1: __gcov_indirect_call.counters = get_relevant_counter_ptr ();
stmt2: tmp1 = (void *) (indirect call argument value)
- stmt3: __gcov_indirect_call_callee = tmp1;
+ stmt3: __gcov_indirect_call.callee = tmp1;
+
+ Example:
+ f_1 = foo;
+ __gcov_indirect_call.counters = &__gcov4.main[0];
+ PROF_9 = f_1;
+ __gcov_indirect_call_callee = PROF_9;
+ _4 = f_1 ();
*/
- stmt1 = gimple_build_assign (ic_gcov_type_ptr_var, ref_ptr);
- tmp1 = make_temp_ssa_name (ptr_void, NULL, "PROF");
+ tree gcov_type_ptr = build_pointer_type (get_gcov_type ());
+
+ tree counter_ref = build3 (COMPONENT_REF, gcov_type_ptr,
+ ic_tuple_var, ic_tuple_counters_field, NULL_TREE);
+
+ stmt1 = gimple_build_assign (counter_ref, ref_ptr);
+ tmp1 = make_temp_ssa_name (ptr_type_node, NULL, "PROF");
stmt2 = gimple_build_assign (tmp1, unshare_expr (value->hvalue.value));
- stmt3 = gimple_build_assign (ic_void_ptr_var, gimple_assign_lhs (stmt2));
+ tree callee_ref = build3 (COMPONENT_REF, ptr_type_node,
+ ic_tuple_var, ic_tuple_callee_field, NULL_TREE);
+ stmt3 = gimple_build_assign (callee_ref, tmp1);
gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT);
gsi_insert_before (&gsi, stmt2, GSI_SAME_STMT);
gimple_gen_ic_func_profiler (void)
{
struct cgraph_node * c_node = cgraph_node::get (current_function_decl);
- gimple_stmt_iterator gsi;
gcall *stmt1;
- gassign *stmt2;
tree tree_uid, cur_func, void0;
if (c_node->only_called_directly_p ())
return;
- gimple_init_edge_profiler ();
+ gimple_init_gcov_profiler ();
+
+ basic_block entry = ENTRY_BLOCK_PTR_FOR_FN (cfun);
+ basic_block cond_bb = split_edge (single_succ_edge (entry));
+ basic_block update_bb = split_edge (single_succ_edge (cond_bb));
+
+ /* We need to do an extra split in order to not create an input
+ for a possible PHI node. */
+ split_edge (single_succ_edge (update_bb));
+
+ edge true_edge = single_succ_edge (cond_bb);
+ true_edge->flags = EDGE_TRUE_VALUE;
+
+ profile_probability probability;
+ if (DECL_VIRTUAL_P (current_function_decl))
+ probability = profile_probability::very_likely ();
+ else
+ probability = profile_probability::unlikely ();
+
+ true_edge->probability = probability;
+ edge e = make_edge (cond_bb, single_succ_edge (update_bb)->dest,
+ EDGE_FALSE_VALUE);
+ e->probability = true_edge->probability.invert ();
/* Insert code:
- stmt1: __gcov_indirect_call_profiler_v2 (profile_id,
- ¤t_function_decl)
- */
- gsi = gsi_after_labels (split_edge (single_succ_edge
- (ENTRY_BLOCK_PTR_FOR_FN (cfun))));
+ if (__gcov_indirect_call_callee != NULL)
+ __gcov_indirect_call_profiler_v3 (profile_id, ¤t_function_decl);
+
+ The function __gcov_indirect_call_profiler_v3 is responsible for
+ resetting __gcov_indirect_call_callee to NULL. */
+
+ gimple_stmt_iterator gsi = gsi_start_bb (cond_bb);
+ void0 = build_int_cst (ptr_type_node, 0);
+
+ tree callee_ref = build3 (COMPONENT_REF, ptr_type_node,
+ ic_tuple_var, ic_tuple_callee_field, NULL_TREE);
+
+ tree ref = force_gimple_operand_gsi (&gsi, callee_ref, true, NULL_TREE,
+ true, GSI_SAME_STMT);
+
+ gcond *cond = gimple_build_cond (NE_EXPR, ref,
+ void0, NULL, NULL);
+ gsi_insert_before (&gsi, cond, GSI_NEW_STMT);
+
+ gsi = gsi_after_labels (update_bb);
cur_func = force_gimple_operand_gsi (&gsi,
build_addr (current_function_decl),
stmt1 = gimple_build_call (tree_indirect_call_profiler_fn, 2,
tree_uid, cur_func);
gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT);
-
- /* Set __gcov_indirect_call_callee to 0,
- so that calls from other modules won't get misattributed
- to the last caller of the current callee. */
- void0 = build_int_cst (build_pointer_type (void_type_node), 0);
- stmt2 = gimple_build_assign (ic_void_ptr_var, void0);
- gsi_insert_before (&gsi, stmt2, GSI_SAME_STMT);
}
/* Output instructions as GIMPLE tree at the beginning for each function.
counter position and GSI is the iterator we place the counter. */
void
-gimple_gen_time_profiler (unsigned tag, unsigned base,
- gimple_stmt_iterator &gsi)
+gimple_gen_time_profiler (unsigned tag)
{
- tree ref_ptr = tree_coverage_counter_addr (tag, base);
- gcall *call;
+ tree type = get_gcov_type ();
+ basic_block entry = ENTRY_BLOCK_PTR_FOR_FN (cfun);
+ basic_block cond_bb = split_edge (single_succ_edge (entry));
+ basic_block update_bb = split_edge (single_succ_edge (cond_bb));
+
+ /* We need to do an extra split in order to not create an input
+ for a possible PHI node. */
+ split_edge (single_succ_edge (update_bb));
+
+ edge true_edge = single_succ_edge (cond_bb);
+ true_edge->flags = EDGE_TRUE_VALUE;
+ true_edge->probability = profile_probability::unlikely ();
+ edge e
+ = make_edge (cond_bb, single_succ_edge (update_bb)->dest, EDGE_FALSE_VALUE);
+ e->probability = true_edge->probability.invert ();
+
+ gimple_stmt_iterator gsi = gsi_start_bb (cond_bb);
+ tree original_ref = tree_coverage_counter_ref (tag, 0);
+ tree ref = force_gimple_operand_gsi (&gsi, original_ref, true, NULL_TREE,
+ true, GSI_SAME_STMT);
+ tree one = build_int_cst (type, 1);
- ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr,
- true, NULL_TREE, true, GSI_SAME_STMT);
- call = gimple_build_call (tree_time_profiler_fn, 1, ref_ptr);
- gsi_insert_before (&gsi, call, GSI_NEW_STMT);
-}
+ /* Emit: if (counters[0] != 0). */
+ gcond *cond = gimple_build_cond (EQ_EXPR, ref, build_int_cst (type, 0),
+ NULL, NULL);
+ gsi_insert_before (&gsi, cond, GSI_NEW_STMT);
-/* Output instructions as GIMPLE trees for code to find the most common value
- of a difference between two evaluations of an expression.
- VALUE is the expression whose value is profiled. TAG is the tag of the
- section for counters, BASE is offset of the counter position. */
+ gsi = gsi_start_bb (update_bb);
-void
-gimple_gen_const_delta_profiler (histogram_value value ATTRIBUTE_UNUSED,
- unsigned tag ATTRIBUTE_UNUSED,
- unsigned base ATTRIBUTE_UNUSED)
-{
- /* FIXME implement this. */
- if (flag_checking)
- internal_error ("unimplemented functionality");
- gcc_unreachable ();
+ /* Emit: counters[0] = ++__gcov_time_profiler_counter. */
+ if (flag_profile_update == PROFILE_UPDATE_ATOMIC)
+ {
+ tree ptr = make_temp_ssa_name (build_pointer_type (type), NULL,
+ "time_profiler_counter_ptr");
+ tree addr = build1 (ADDR_EXPR, TREE_TYPE (ptr),
+ tree_time_profiler_counter);
+ gassign *assign = gimple_build_assign (ptr, NOP_EXPR, addr);
+ gsi_insert_before (&gsi, assign, GSI_NEW_STMT);
+ tree f = builtin_decl_explicit (LONG_LONG_TYPE_SIZE > 32
+ ? BUILT_IN_ATOMIC_ADD_FETCH_8:
+ BUILT_IN_ATOMIC_ADD_FETCH_4);
+ gcall *stmt = gimple_build_call (f, 3, ptr, one,
+ build_int_cst (integer_type_node,
+ MEMMODEL_RELAXED));
+ tree result_type = TREE_TYPE (TREE_TYPE (f));
+ tree tmp = make_temp_ssa_name (result_type, NULL, "time_profile");
+ gimple_set_lhs (stmt, tmp);
+ gsi_insert_after (&gsi, stmt, GSI_NEW_STMT);
+ tmp = make_temp_ssa_name (type, NULL, "time_profile");
+ assign = gimple_build_assign (tmp, NOP_EXPR,
+ gimple_call_lhs (stmt));
+ gsi_insert_after (&gsi, assign, GSI_NEW_STMT);
+ assign = gimple_build_assign (original_ref, tmp);
+ gsi_insert_after (&gsi, assign, GSI_NEW_STMT);
+ }
+ else
+ {
+ tree tmp = make_temp_ssa_name (type, NULL, "time_profile");
+ gassign *assign = gimple_build_assign (tmp, tree_time_profiler_counter);
+ gsi_insert_before (&gsi, assign, GSI_NEW_STMT);
+
+ tmp = make_temp_ssa_name (type, NULL, "time_profile");
+ assign = gimple_build_assign (tmp, PLUS_EXPR, gimple_assign_lhs (assign),
+ one);
+ gsi_insert_after (&gsi, assign, GSI_NEW_STMT);
+ assign = gimple_build_assign (original_ref, tmp);
+ gsi_insert_after (&gsi, assign, GSI_NEW_STMT);
+ assign = gimple_build_assign (tree_time_profiler_counter, tmp);
+ gsi_insert_after (&gsi, assign, GSI_NEW_STMT);
+ }
}
/* Output instructions as GIMPLE trees to increment the average histogram
tag of the section for counters, BASE is offset of the counter position. */
void
-gimple_gen_average_profiler (histogram_value value, unsigned tag, unsigned base)
+gimple_gen_average_profiler (histogram_value value, unsigned tag)
{
gimple *stmt = value->hvalue.stmt;
gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
- tree ref_ptr = tree_coverage_counter_addr (tag, base);
+ tree ref_ptr = tree_coverage_counter_addr (tag, 0);
gcall *call;
tree val;
tag of the section for counters, BASE is offset of the counter position. */
void
-gimple_gen_ior_profiler (histogram_value value, unsigned tag, unsigned base)
+gimple_gen_ior_profiler (histogram_value value, unsigned tag)
{
gimple *stmt = value->hvalue.stmt;
gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
- tree ref_ptr = tree_coverage_counter_addr (tag, base);
+ tree ref_ptr = tree_coverage_counter_addr (tag, 0);
gcall *call;
tree val;
gsi_insert_before (&gsi, call, GSI_NEW_STMT);
}
+static vec<regex_t> profile_filter_files;
+static vec<regex_t> profile_exclude_files;
+
+/* Parse list of provided REGEX (separated with semi-collon) and
+ create expressions (of type regex_t) and save them into V vector.
+ If there is a regular expression parsing error, error message is
+ printed for FLAG_NAME. */
+
+static void
+parse_profile_filter (const char *regex, vec<regex_t> *v,
+ const char *flag_name)
+{
+ v->create (4);
+ if (regex != NULL)
+ {
+ char *str = xstrdup (regex);
+ for (char *p = strtok (str, ";"); p != NULL; p = strtok (NULL, ";"))
+ {
+ regex_t r;
+ if (regcomp (&r, p, REG_EXTENDED | REG_NOSUB) != 0)
+ {
+ error ("invalid regular expression %qs in %qs",
+ p, flag_name);
+ return;
+ }
+
+ v->safe_push (r);
+ }
+ }
+}
+
+/* Parse values of -fprofile-filter-files and -fprofile-exclude-files
+ options. */
+
+static void
+parse_profile_file_filtering ()
+{
+ parse_profile_filter (flag_profile_filter_files, &profile_filter_files,
+ "-fprofile-filter-files");
+ parse_profile_filter (flag_profile_exclude_files, &profile_exclude_files,
+ "-fprofile-exclude-files");
+}
+
+/* Parse vectors of regular expressions. */
+
+static void
+release_profile_file_filtering ()
+{
+ profile_filter_files.release ();
+ profile_exclude_files.release ();
+}
+
+/* Return true when FILENAME should be instrumented based on
+ -fprofile-filter-files and -fprofile-exclude-files options. */
+
+static bool
+include_source_file_for_profile (const char *filename)
+{
+ /* First check whether file is included in flag_profile_exclude_files. */
+ for (unsigned i = 0; i < profile_exclude_files.length (); i++)
+ if (regexec (&profile_exclude_files[i],
+ filename, 0, NULL, 0) == REG_NOERROR)
+ return false;
+
+ /* For non-empty flag_profile_filter_files include only files matching a
+ regex in the flag. */
+ if (profile_filter_files.is_empty ())
+ return true;
+
+ for (unsigned i = 0; i < profile_filter_files.length (); i++)
+ if (regexec (&profile_filter_files[i], filename, 0, NULL, 0) == REG_NOERROR)
+ return true;
+
+ return false;
+}
+
+#ifndef HAVE_sync_compare_and_swapsi
+#define HAVE_sync_compare_and_swapsi 0
+#endif
+#ifndef HAVE_atomic_compare_and_swapsi
+#define HAVE_atomic_compare_and_swapsi 0
+#endif
+
+#ifndef HAVE_sync_compare_and_swapdi
+#define HAVE_sync_compare_and_swapdi 0
+#endif
+#ifndef HAVE_atomic_compare_and_swapdi
+#define HAVE_atomic_compare_and_swapdi 0
+#endif
+
/* Profile all functions in the callgraph. */
static unsigned int
{
struct cgraph_node *node;
+ /* Verify whether we can utilize atomic update operations. */
+ bool can_support_atomic = false;
+ unsigned HOST_WIDE_INT gcov_type_size
+ = tree_to_uhwi (TYPE_SIZE_UNIT (get_gcov_type ()));
+ if (gcov_type_size == 4)
+ can_support_atomic
+ = HAVE_sync_compare_and_swapsi || HAVE_atomic_compare_and_swapsi;
+ else if (gcov_type_size == 8)
+ can_support_atomic
+ = HAVE_sync_compare_and_swapdi || HAVE_atomic_compare_and_swapdi;
+
+ if (flag_profile_update == PROFILE_UPDATE_ATOMIC
+ && !can_support_atomic)
+ {
+ warning (0, "target does not support atomic profile update, "
+ "single mode is selected");
+ flag_profile_update = PROFILE_UPDATE_SINGLE;
+ }
+ else if (flag_profile_update == PROFILE_UPDATE_PREFER_ATOMIC)
+ flag_profile_update = can_support_atomic
+ ? PROFILE_UPDATE_ATOMIC : PROFILE_UPDATE_SINGLE;
+
/* This is a small-ipa pass that gets called only once, from
cgraphunit.c:ipa_passes(). */
gcc_assert (symtab->state == IPA_SSA);
init_node_map (true);
+ parse_profile_file_filtering ();
FOR_EACH_DEFINED_FUNCTION (node)
{
- if (!gimple_has_body_p (node->decl))
+ bool thunk = false;
+ if (!gimple_has_body_p (node->decl) && !node->thunk.thunk_p)
continue;
/* Don't profile functions produced for builtin stuff. */
if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION)
continue;
+ if (lookup_attribute ("no_profile_instrument_function",
+ DECL_ATTRIBUTES (node->decl)))
+ continue;
/* Do not instrument extern inline functions when testing coverage.
While this is not perfectly consistent (early inlined extern inlines
will get acocunted), testsuite expects that. */
&& flag_test_coverage)
continue;
+ const char *file = LOCATION_FILE (DECL_SOURCE_LOCATION (node->decl));
+ if (!include_source_file_for_profile (file))
+ continue;
+
+ if (node->thunk.thunk_p)
+ {
+ /* We cannot expand variadic thunks to Gimple. */
+ if (stdarg_p (TREE_TYPE (node->decl)))
+ continue;
+ thunk = true;
+ /* When generate profile, expand thunk to gimple so it can be
+ instrumented same way as other functions. */
+ if (profile_arc_flag)
+ node->expand_thunk (false, true);
+ /* Read cgraph profile but keep function as thunk at profile-use
+ time. */
+ else
+ {
+ read_thunk_profile (node);
+ continue;
+ }
+ }
+
push_cfun (DECL_STRUCT_FUNCTION (node->decl));
+ if (dump_file)
+ dump_function_header (dump_file, cfun->decl, dump_flags);
+
/* Local pure-const may imply need to fixup the cfg. */
- if (execute_fixup_cfg () & TODO_cleanup_cfg)
+ if (gimple_has_body_p (node->decl)
+ && (execute_fixup_cfg () & TODO_cleanup_cfg))
cleanup_tree_cfg ();
- branch_prob ();
+ branch_prob (thunk);
if (! flag_branch_probabilities
&& flag_profile_values)
gimple_gen_ic_func_profiler ();
if (flag_branch_probabilities
+ && !thunk
&& flag_profile_values
&& flag_value_profile_transformations)
gimple_value_profile_transformations ();
pop_cfun ();
}
+ release_profile_file_filtering ();
+
/* Drop pure/const flags from instrumented functions. */
if (profile_arc_flag || flag_test_coverage)
FOR_EACH_DEFINED_FUNCTION (node)
projects / gcc.git / blobdiff