/* Calculate branch probabilities, and basic block execution counts.
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ 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.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* Generate basic block profile instrumentation and auxiliary files.
Tree-based version. See profile.c for overview. */
#include "timevar.h"
#include "value-prof.h"
#include "ggc.h"
+#include "cgraph.h"
static GTY(()) tree gcov_type_node;
+static GTY(()) tree gcov_type_tmp_var;
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_indirect_call_profiler_fn;
+static GTY(()) tree tree_average_profiler_fn;
+static GTY(()) tree tree_ior_profiler_fn;
\f
+static GTY(()) tree ic_void_ptr_var;
+static GTY(()) tree ic_gcov_type_ptr_var;
+static GTY(()) tree ptr_void;
+
/* Do initialization work for the edge profiler. */
+/* Add code:
+ static gcov* __gcov_indirect_call_counters; // pointer to actual counter
+ static void* __gcov_indirect_call_callee; // actual callee addres
+*/
+static void
+tree_init_ic_make_global_vars (void)
+{
+ tree gcov_type_ptr;
+
+ ptr_void = build_pointer_type (void_type_node);
+
+ ic_void_ptr_var
+ = build_decl (VAR_DECL,
+ get_identifier ("__gcov_indirect_call_callee"),
+ ptr_void);
+ TREE_STATIC (ic_void_ptr_var) = 1;
+ TREE_PUBLIC (ic_void_ptr_var) = 0;
+ DECL_ARTIFICIAL (ic_void_ptr_var) = 1;
+ DECL_INITIAL (ic_void_ptr_var) = NULL;
+ assemble_variable (ic_void_ptr_var, 0, 0, 0);
+
+ gcov_type_ptr = build_pointer_type (get_gcov_type ());
+ ic_gcov_type_ptr_var
+ = build_decl (VAR_DECL,
+ get_identifier ("__gcov_indirect_call_counters"),
+ gcov_type_ptr);
+ TREE_STATIC (ic_gcov_type_ptr_var) = 1;
+ TREE_PUBLIC (ic_gcov_type_ptr_var) = 0;
+ DECL_ARTIFICIAL (ic_gcov_type_ptr_var) = 1;
+ DECL_INITIAL (ic_gcov_type_ptr_var) = NULL;
+ assemble_variable (ic_gcov_type_ptr_var, 0, 0, 0);
+}
+
static void
tree_init_edge_profiler (void)
{
tree pow2_profiler_fn_type;
tree one_value_profiler_fn_type;
tree gcov_type_ptr;
+ tree ic_profiler_fn_type;
+ tree average_profiler_fn_type;
if (!gcov_type_node)
{
tree_one_value_profiler_fn
= build_fn_decl ("__gcov_one_value_profiler",
one_value_profiler_fn_type);
+
+ tree_init_ic_make_global_vars ();
+
+ /* void (*) (gcov_type *, gcov_type, void *, void *) */
+ ic_profiler_fn_type
+ = build_function_type_list (void_type_node,
+ gcov_type_ptr, gcov_type_node,
+ ptr_void,
+ ptr_void, NULL_TREE);
+ tree_indirect_call_profiler_fn
+ = build_fn_decl ("__gcov_indirect_call_profiler",
+ ic_profiler_fn_type);
+ /* 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);
+ tree_ior_profiler_fn
+ = build_fn_decl ("__gcov_ior_profiler",
+ average_profiler_fn_type);
}
}
static void
tree_gen_edge_profiler (int edgeno, edge e)
{
- tree tmp1 = create_tmp_var (gcov_type_node, "PROF");
- tree tmp2 = create_tmp_var (gcov_type_node, "PROF");
- tree ref = tree_coverage_counter_ref (GCOV_COUNTER_ARCS, edgeno);
- tree stmt1 = build2 (MODIFY_EXPR, gcov_type_node, tmp1, ref);
- tree stmt2 = build2 (MODIFY_EXPR, gcov_type_node, tmp2,
- build2 (PLUS_EXPR, gcov_type_node,
- tmp1, integer_one_node));
- tree stmt3 = build2 (MODIFY_EXPR, gcov_type_node, ref, tmp2);
+ tree ref, one, stmt1, stmt2, stmt3;
+
+ /* We share one temporary variable declaration per function. This
+ gets re-set in tree_profiling. */
+ if (gcov_type_tmp_var == NULL_TREE)
+ gcov_type_tmp_var = create_tmp_var (gcov_type_node, "PROF_edge_counter");
+ ref = tree_coverage_counter_ref (GCOV_COUNTER_ARCS, edgeno);
+ one = build_int_cst (gcov_type_node, 1);
+ stmt1 = build_gimple_modify_stmt (gcov_type_tmp_var, ref);
+ stmt2 = build_gimple_modify_stmt (gcov_type_tmp_var,
+ build2 (PLUS_EXPR, gcov_type_node,
+ gcov_type_tmp_var, one));
+ stmt3 = build_gimple_modify_stmt (unshare_expr (ref), gcov_type_tmp_var);
bsi_insert_on_edge (e, stmt1);
bsi_insert_on_edge (e, stmt2);
bsi_insert_on_edge (e, stmt3);
{
tree val = value->hvalue.value;
return force_gimple_operand_bsi (bsi, fold_convert (gcov_type_node, val),
- true, NULL_TREE);
+ true, NULL_TREE, true, BSI_SAME_STMT);
}
/* Output instructions as GIMPLE trees to increment the interval histogram
tree stmt = value->hvalue.stmt;
block_stmt_iterator bsi = bsi_for_stmt (stmt);
tree ref = tree_coverage_counter_ref (tag, base), ref_ptr;
- tree args, call, val;
+ tree call, val;
tree start = build_int_cst_type (integer_type_node, value->hdata.intvl.int_start);
tree steps = build_int_cst_type (unsigned_type_node, value->hdata.intvl.steps);
ref_ptr = force_gimple_operand_bsi (&bsi,
build_addr (ref, current_function_decl),
- true, NULL_TREE);
+ true, NULL_TREE, true, BSI_SAME_STMT);
val = prepare_instrumented_value (&bsi, value);
- args = tree_cons (NULL_TREE, ref_ptr,
- tree_cons (NULL_TREE, val,
- tree_cons (NULL_TREE, start,
- tree_cons (NULL_TREE, steps,
- NULL_TREE))));
- call = build_function_call_expr (tree_interval_profiler_fn, args);
+ call = build_call_expr (tree_interval_profiler_fn, 4,
+ ref_ptr, val, start, steps);
bsi_insert_before (&bsi, call, BSI_SAME_STMT);
}
{
tree stmt = value->hvalue.stmt;
block_stmt_iterator bsi = bsi_for_stmt (stmt);
- tree ref = tree_coverage_counter_ref (tag, base), ref_ptr;
- tree args, call, val;
+ tree ref_ptr = tree_coverage_counter_addr (tag, base);
+ tree call, val;
- ref_ptr = force_gimple_operand_bsi (&bsi,
- build_addr (ref, current_function_decl),
- true, NULL_TREE);
+ ref_ptr = force_gimple_operand_bsi (&bsi, ref_ptr,
+ true, NULL_TREE, true, BSI_SAME_STMT);
val = prepare_instrumented_value (&bsi, value);
- args = tree_cons (NULL_TREE, ref_ptr,
- tree_cons (NULL_TREE, val,
- NULL_TREE));
- call = build_function_call_expr (tree_pow2_profiler_fn, args);
+ call = build_call_expr (tree_pow2_profiler_fn, 2, ref_ptr, val);
bsi_insert_before (&bsi, call, BSI_SAME_STMT);
}
{
tree stmt = value->hvalue.stmt;
block_stmt_iterator bsi = bsi_for_stmt (stmt);
- tree ref = tree_coverage_counter_ref (tag, base), ref_ptr;
- tree args, call, val;
+ tree ref_ptr = tree_coverage_counter_addr (tag, base);
+ tree call, val;
- ref_ptr = force_gimple_operand_bsi (&bsi,
- build_addr (ref, current_function_decl),
- true, NULL_TREE);
+ ref_ptr = force_gimple_operand_bsi (&bsi, ref_ptr,
+ true, NULL_TREE, true, BSI_SAME_STMT);
val = prepare_instrumented_value (&bsi, value);
- args = tree_cons (NULL_TREE, ref_ptr,
- tree_cons (NULL_TREE, val,
- NULL_TREE));
- call = build_function_call_expr (tree_one_value_profiler_fn, args);
+ call = build_call_expr (tree_one_value_profiler_fn, 2, ref_ptr, val);
bsi_insert_before (&bsi, call, BSI_SAME_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. */
+
+static void
+tree_gen_ic_profiler (histogram_value value, unsigned tag, unsigned base)
+{
+ tree tmp1, stmt1, stmt2, stmt3;
+ tree stmt = value->hvalue.stmt;
+ block_stmt_iterator bsi = bsi_for_stmt (stmt);
+ tree ref_ptr = tree_coverage_counter_addr (tag, base);
+
+ ref_ptr = force_gimple_operand_bsi (&bsi, ref_ptr,
+ true, NULL_TREE, true, BSI_SAME_STMT);
+
+ /* Insert code:
+
+ __gcov_indirect_call_counters = get_relevant_counter_ptr ();
+ __gcov_indirect_call_callee = (void *) indirect call argument;
+ */
+
+ tmp1 = create_tmp_var (ptr_void, "PROF");
+ stmt1 = build_gimple_modify_stmt (ic_gcov_type_ptr_var, ref_ptr);
+ stmt2 = build_gimple_modify_stmt (tmp1, unshare_expr (value->hvalue.value));
+ stmt3 = build_gimple_modify_stmt (ic_void_ptr_var, tmp1);
+
+ bsi_insert_before (&bsi, stmt1, BSI_SAME_STMT);
+ bsi_insert_before (&bsi, stmt2, BSI_SAME_STMT);
+ bsi_insert_before (&bsi, stmt3, BSI_SAME_STMT);
+}
+
+
+/* Output instructions as GIMPLE trees for code to find the most
+ common called function in indirect call. Insert instructions at the
+ beginning of every possible called function.
+ */
+
+static void
+tree_gen_ic_func_profiler (void)
+{
+ struct cgraph_node * c_node = cgraph_node (current_function_decl);
+ block_stmt_iterator bsi;
+ edge e;
+ basic_block bb;
+ edge_iterator ei;
+ tree stmt1;
+ tree tree_uid, cur_func;
+
+ if (flag_unit_at_a_time)
+ {
+ if (!c_node->needed)
+ return;
+ }
+
+ tree_init_edge_profiler ();
+
+ FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR->succs)
+ {
+ bb = split_edge (e);
+ bsi = bsi_start (bb);
+ cur_func = force_gimple_operand_bsi (&bsi,
+ build_addr (current_function_decl,
+ current_function_decl),
+ true, NULL_TREE,
+ true, BSI_SAME_STMT);
+ tree_uid = build_int_cst (gcov_type_node, c_node->pid);
+ stmt1 = build_call_expr (tree_indirect_call_profiler_fn, 4,
+ ic_gcov_type_ptr_var,
+ tree_uid,
+ cur_func,
+ ic_void_ptr_var);
+ bsi_insert_after (&bsi, stmt1, BSI_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
gcc_unreachable ();
}
+/* Output instructions as GIMPLE trees to increment the average 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. */
+
+static void
+tree_gen_average_profiler (histogram_value value, unsigned tag, unsigned base)
+{
+ tree stmt = value->hvalue.stmt;
+ block_stmt_iterator bsi = bsi_for_stmt (stmt);
+ tree ref_ptr = tree_coverage_counter_addr (tag, base);
+ tree call, val;
+
+ ref_ptr = force_gimple_operand_bsi (&bsi, ref_ptr,
+ true, NULL_TREE,
+ true, BSI_SAME_STMT);
+ val = prepare_instrumented_value (&bsi, value);
+ call = build_call_expr (tree_average_profiler_fn, 2, ref_ptr, val);
+ bsi_insert_before (&bsi, call, BSI_SAME_STMT);
+}
+
+/* Output instructions as GIMPLE trees to increment the ior 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. */
+
+static void
+tree_gen_ior_profiler (histogram_value value, unsigned tag, unsigned base)
+{
+ tree stmt = value->hvalue.stmt;
+ block_stmt_iterator bsi = bsi_for_stmt (stmt);
+ tree ref_ptr = tree_coverage_counter_addr (tag, base);
+ tree call, val;
+
+ ref_ptr = force_gimple_operand_bsi (&bsi, ref_ptr,
+ true, NULL_TREE, true, BSI_SAME_STMT);
+ val = prepare_instrumented_value (&bsi, value);
+ call = build_call_expr (tree_ior_profiler_fn, 2, ref_ptr, val);
+ bsi_insert_before (&bsi, call, BSI_SAME_STMT);
+}
+
/* Return 1 if tree-based profiling is in effect, else 0.
If it is, set up hooks for tree-based profiling.
Gate for pass_tree_profile. */
return false;
}
-static void
+static unsigned int
tree_profiling (void)
{
+ /* Don't profile functions produced at destruction time, particularly
+ the gcov datastructure initializer. Don't profile if it has been
+ already instrumented either (when OpenMP expansion creates
+ child function from already instrumented body). */
+ if (cgraph_state == CGRAPH_STATE_FINISHED
+ || cfun->after_tree_profile)
+ return 0;
+
+ /* Re-set global shared temporary variable for edge-counters. */
+ gcov_type_tmp_var = NULL_TREE;
+
branch_prob ();
+
+ if (! flag_branch_probabilities
+ && flag_profile_values)
+ tree_gen_ic_func_profiler ();
+
if (flag_branch_probabilities
&& flag_profile_values
&& flag_value_profile_transformations)
easy to adjust it, if and when there is some. */
free_dominance_info (CDI_DOMINATORS);
free_dominance_info (CDI_POST_DOMINATORS);
+ cfun->after_tree_profile = 1;
+ return 0;
}
-struct tree_opt_pass pass_tree_profile =
+struct gimple_opt_pass pass_tree_profile =
{
+ {
+ GIMPLE_PASS,
"tree_profile", /* name */
do_tree_profiling, /* gate */
tree_profiling, /* execute */
PROP_gimple_leh | PROP_cfg, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_verify_stmts, /* todo_flags_finish */
- 0 /* letter */
-};
-
-/* Return 1 if tree-based profiling is in effect, else 0.
- If it is, set up hooks for tree-based profiling.
- Gate for pass_tree_profile. */
-
-static bool
-do_early_tree_profiling (void)
-{
- return (do_tree_profiling () && (!flag_unit_at_a_time || !optimize));
-}
-
-struct tree_opt_pass pass_early_tree_profile =
-{
- "early_tree_profile", /* name */
- do_early_tree_profiling, /* gate */
- tree_profiling, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- TV_BRANCH_PROB, /* tv_id */
- PROP_gimple_leh | PROP_cfg, /* properties_required */
- PROP_gimple_leh | PROP_cfg, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- TODO_verify_stmts, /* todo_flags_finish */
- 0 /* letter */
+ TODO_verify_stmts | TODO_dump_func /* todo_flags_finish */
+ }
};
struct profile_hooks tree_profile_hooks =
{
- tree_init_edge_profiler, /* init_edge_profiler */
- tree_gen_edge_profiler, /* gen_edge_profiler */
- tree_gen_interval_profiler, /* gen_interval_profiler */
- tree_gen_pow2_profiler, /* gen_pow2_profiler */
- tree_gen_one_value_profiler, /* gen_one_value_profiler */
- tree_gen_const_delta_profiler /* gen_const_delta_profiler */
+ tree_init_edge_profiler, /* init_edge_profiler */
+ tree_gen_edge_profiler, /* gen_edge_profiler */
+ tree_gen_interval_profiler, /* gen_interval_profiler */
+ tree_gen_pow2_profiler, /* gen_pow2_profiler */
+ tree_gen_one_value_profiler, /* gen_one_value_profiler */
+ tree_gen_const_delta_profiler, /* gen_const_delta_profiler */
+ tree_gen_ic_profiler, /* gen_ic_profiler */
+ tree_gen_average_profiler, /* gen_average_profiler */
+ tree_gen_ior_profiler /* gen_ior_profiler */
};
#include "gt-tree-profile.h"