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author | Jing Yu <jingyu@google.com> | 2010-07-22 14:03:48 -0700 |
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committer | Jing Yu <jingyu@google.com> | 2010-07-22 14:03:48 -0700 |
commit | b094d6c4bf572654a031ecc4afe675154c886dc5 (patch) | |
tree | 89394c56b05e13a5413ee60237d65b0214fd98e2 /gcc-4.4.3/gcc/tree-profile.c | |
parent | dc34721ac3bf7e3c406fba8cfe9d139393345ec5 (diff) | |
download | toolchain_gcc-b094d6c4bf572654a031ecc4afe675154c886dc5.tar.gz toolchain_gcc-b094d6c4bf572654a031ecc4afe675154c886dc5.tar.bz2 toolchain_gcc-b094d6c4bf572654a031ecc4afe675154c886dc5.zip |
commit gcc-4.4.3 which is used to build gcc-4.4.3 Android toolchain in master.
The source is based on fsf gcc-4.4.3 and contains local patches which
are recorded in gcc-4.4.3/README.google.
Change-Id: Id8c6d6927df274ae9749196a1cc24dbd9abc9887
Diffstat (limited to 'gcc-4.4.3/gcc/tree-profile.c')
-rw-r--r-- | gcc-4.4.3/gcc/tree-profile.c | 842 |
1 files changed, 842 insertions, 0 deletions
diff --git a/gcc-4.4.3/gcc/tree-profile.c b/gcc-4.4.3/gcc/tree-profile.c new file mode 100644 index 000000000..cebf93cab --- /dev/null +++ b/gcc-4.4.3/gcc/tree-profile.c @@ -0,0 +1,842 @@ +/* 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, 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. + Converted to use trees by Dale Johannesen, Apple Computer. + +This file is part of GCC. + +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 3, or (at your option) any later +version. + +GCC is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. + +You should have received a copy of the GNU General Public License +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 "config.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "rtl.h" +#include "flags.h" +#include "target.h" +#include "output.h" +#include "regs.h" +#include "expr.h" +#include "function.h" +#include "toplev.h" +#include "coverage.h" +#include "tree.h" +#include "tree-flow.h" +#include "tree-dump.h" +#include "tree-pass.h" +#include "timevar.h" +#include "value-prof.h" +#include "ggc.h" +#include "cgraph.h" +#include "target.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_indirect_call_topn_profiler_fn; +static GTY(()) tree tree_direct_call_profiler_fn; +static GTY(()) tree tree_average_profiler_fn; +static GTY(()) tree tree_ior_profiler_fn; + + +static GTY(()) tree ic_void_ptr_var; +static GTY(()) tree ic_gcov_type_ptr_var; +static GTY(()) tree dc_void_ptr_var; +static GTY(()) tree dc_gcov_type_ptr_var; +static GTY(()) tree ptr_void; +static GTY(()) tree gcov_info_decl; + +/* Do initialization work for the edge profiler. */ + +/* Add code: + // if flag_dyn_ipa + extern gcov* __gcov_indirect_call_topn_counters; // pointer to actual counter + extern void* __gcov_indirect_call_topn_callee; // actual callee address + + // else + static gcov* __gcov_indirect_call_counters; // pointer to actual counter + static void* __gcov_indirect_call_callee; // actual callee address +*/ +static void +tree_init_ic_make_global_vars (void) +{ + tree gcov_type_ptr; + + ptr_void = build_pointer_type (void_type_node); + + if (flag_dyn_ipa) + { + ic_void_ptr_var + = build_decl (VAR_DECL, + get_identifier ("__gcov_indirect_call_topn_callee"), + ptr_void); + TREE_PUBLIC (ic_void_ptr_var) = 1; + DECL_EXTERNAL (ic_void_ptr_var) = 1; + if (targetm.have_tls) + { + DECL_TLS_MODEL (ic_void_ptr_var) = + decl_default_tls_model (ic_void_ptr_var); + } + + gcov_type_ptr = build_pointer_type (get_gcov_type ()); + ic_gcov_type_ptr_var + = build_decl (VAR_DECL, + get_identifier ("__gcov_indirect_call_topn_counters"), + gcov_type_ptr); + TREE_PUBLIC (ic_gcov_type_ptr_var) = 1; + DECL_EXTERNAL (ic_gcov_type_ptr_var) = 1; + if (targetm.have_tls) + { + DECL_TLS_MODEL (ic_gcov_type_ptr_var) = + decl_default_tls_model (ic_gcov_type_ptr_var); + } + } + else + { + 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_INITIAL (ic_void_ptr_var) = NULL; + if (targetm.have_tls) + { + DECL_TLS_MODEL (ic_void_ptr_var) = + decl_default_tls_model (ic_void_ptr_var); + } + + 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_INITIAL (ic_gcov_type_ptr_var) = NULL; + if (targetm.have_tls) + { + DECL_TLS_MODEL (ic_gcov_type_ptr_var) = + decl_default_tls_model (ic_gcov_type_ptr_var); + } + } + + DECL_ARTIFICIAL (ic_void_ptr_var) = 1; + DECL_ARTIFICIAL (ic_gcov_type_ptr_var) = 1; + assemble_variable (ic_void_ptr_var, 0, 0, 0); + assemble_variable (ic_gcov_type_ptr_var, 0, 0, 0); +} + +static void +tree_init_edge_profiler (void) +{ + tree interval_profiler_fn_type; + tree pow2_profiler_fn_type; + tree one_value_profiler_fn_type; + tree gcov_type_ptr; + tree ic_profiler_fn_type; + tree ic_topn_profiler_fn_type; + tree dc_profiler_fn_type; + tree average_profiler_fn_type; + + if (!gcov_type_node) + { + char name_buf[32]; + gcov_type_node = get_gcov_type (); + gcov_type_ptr = build_pointer_type (gcov_type_node); + + ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0); + gcov_info_decl = build_decl (VAR_DECL, get_identifier (name_buf), + get_gcov_unsigned_t ()); + DECL_EXTERNAL (gcov_info_decl) = 1; + + /* void (*) (gcov_type *, gcov_type, int, unsigned) */ + interval_profiler_fn_type + = build_function_type_list (void_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); + + /* void (*) (gcov_type *, gcov_type) */ + pow2_profiler_fn_type + = 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); + + /* void (*) (gcov_type *, gcov_type) */ + one_value_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_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 (*) (void *, void *, gcov_unsigned_t) */ + ic_topn_profiler_fn_type + = build_function_type_list (void_type_node, ptr_void, ptr_void, + get_gcov_unsigned_t (), NULL_TREE); + tree_indirect_call_topn_profiler_fn + = build_fn_decl ("__gcov_indirect_call_topn_profiler", + ic_topn_profiler_fn_type); + + /* void (*) (void *, void *, gcov_unsigned_t) */ + dc_profiler_fn_type + = build_function_type_list (void_type_node, ptr_void, ptr_void, + get_gcov_unsigned_t (), NULL_TREE); + tree_direct_call_profiler_fn + = build_fn_decl ("__gcov_direct_call_profiler", + dc_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); + } +} + +/* New call was added, make goto call edges if neccesary. */ + +static void +add_abnormal_goto_call_edges (gimple_stmt_iterator gsi) +{ + gimple stmt = gsi_stmt (gsi); + + if (!stmt_can_make_abnormal_goto (stmt)) + return; + if (!gsi_end_p (gsi)) + split_block (gimple_bb (stmt), stmt); + make_abnormal_goto_edges (gimple_bb (stmt), true); +} + +/* Output instructions as GIMPLE trees to increment the edge + execution count, and insert them on E. We rely on + gsi_insert_on_edge to preserve the order. */ + +static void +tree_gen_edge_profiler (int edgeno, edge e) +{ + tree ref, one; + gimple 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 = gimple_build_assign (gcov_type_tmp_var, ref); + stmt2 = gimple_build_assign_with_ops (PLUS_EXPR, gcov_type_tmp_var, + gcov_type_tmp_var, one); + stmt3 = gimple_build_assign (unshare_expr (ref), gcov_type_tmp_var); + 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 + variable containing the value. */ + +static tree +prepare_instrumented_value (gimple_stmt_iterator *gsi, histogram_value value) +{ + tree val = value->hvalue.value; + return force_gimple_operand_gsi (gsi, fold_convert (gcov_type_node, val), + true, NULL_TREE, true, GSI_SAME_STMT); +} + +/* Output instructions as GIMPLE trees to increment the interval 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_interval_profiler (histogram_value value, unsigned tag, unsigned base) +{ + gimple stmt = value->hvalue.stmt; + gimple_stmt_iterator gsi = gsi_for_stmt (stmt); + tree ref = tree_coverage_counter_ref (tag, base), ref_ptr; + gimple call; + tree 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_gsi (&gsi, + build_addr (ref, current_function_decl), + true, NULL_TREE, true, GSI_SAME_STMT); + val = prepare_instrumented_value (&gsi, value); + call = gimple_build_call (tree_interval_profiler_fn, 4, + ref_ptr, val, start, steps); + gsi_insert_before (&gsi, call, GSI_NEW_STMT); + add_abnormal_goto_call_edges (gsi); +} + +/* 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. */ + +static void +tree_gen_pow2_profiler (histogram_value value, unsigned tag, unsigned base) +{ + gimple stmt = value->hvalue.stmt; + gimple_stmt_iterator gsi = gsi_for_stmt (stmt); + tree ref_ptr = tree_coverage_counter_addr (tag, base); + gimple 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_pow2_profiler_fn, 2, ref_ptr, val); + gsi_insert_before (&gsi, call, GSI_NEW_STMT); + add_abnormal_goto_call_edges (gsi); +} + +/* 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. */ + +static void +tree_gen_one_value_profiler (histogram_value value, unsigned tag, unsigned base) +{ + gimple stmt = value->hvalue.stmt; + gimple_stmt_iterator gsi = gsi_for_stmt (stmt); + tree ref_ptr = tree_coverage_counter_addr (tag, base); + gimple 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); + gsi_insert_before (&gsi, call, GSI_NEW_STMT); + add_abnormal_goto_call_edges (gsi); +} + + +/* 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; + gimple stmt1, stmt2, stmt3; + gimple stmt; + gimple_stmt_iterator gsi; + tree ref_ptr; + + /* TODO add option -- only disble for topn icall profiling. */ + if (DECL_STATIC_CONSTRUCTOR (current_function_decl) + || DECL_STATIC_CONSTRUCTOR (current_function_decl)) + return; + + stmt = value->hvalue.stmt; + gsi = gsi_for_stmt (stmt); + ref_ptr = tree_coverage_counter_addr (tag, base); + ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, + true, NULL_TREE, true, GSI_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 = gimple_build_assign (ic_gcov_type_ptr_var, ref_ptr); + stmt2 = gimple_build_assign (tmp1, unshare_expr (value->hvalue.value)); + stmt3 = gimple_build_assign (ic_void_ptr_var, tmp1); + + gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT); + gsi_insert_before (&gsi, stmt2, GSI_SAME_STMT); + gsi_insert_before (&gsi, stmt3, GSI_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); + gimple_stmt_iterator gsi; + edge e; + basic_block bb; + edge_iterator ei; + gimple stmt1, stmt2; + tree tree_uid, cur_func; + + if (!c_node->needed) + return; + + tree_init_edge_profiler (); + + FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR->succs) + { + tree void0; + + bb = split_edge (e); + gsi = gsi_start_bb (bb); + + cur_func = force_gimple_operand_gsi (&gsi, + build_addr (current_function_decl, + current_function_decl), + true, NULL_TREE, + true, GSI_SAME_STMT); + tree_uid = build_int_cst (gcov_type_node, c_node->pid); + stmt1 = gimple_build_call (tree_indirect_call_profiler_fn, 4, + ic_gcov_type_ptr_var, + tree_uid, + cur_func, + ic_void_ptr_var); + gsi_insert_after (&gsi, stmt1, GSI_NEW_STMT); + gcc_assert (EDGE_COUNT (bb->succs) == 1); + bb = split_edge (EDGE_I (bb->succs, 0)); + add_abnormal_goto_call_edges (gsi); + + gsi = gsi_start_bb (bb); + /* 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_after (&gsi, stmt2, GSI_NEW_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_topn_profiler (void) +{ + struct cgraph_node * c_node = cgraph_node (current_function_decl); + gimple_stmt_iterator gsi; + edge e; + basic_block bb; + edge_iterator ei; + gimple stmt1; + tree cur_func, gcov_info, cur_func_id; + + if (DECL_STATIC_CONSTRUCTOR (current_function_decl) + || DECL_STATIC_CONSTRUCTOR (current_function_decl) + || DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (current_function_decl)) + return; + + /* We want to make sure template functions are instrumented even though + it is not 'needed' in this module. It is possible that the function + is needed (e.g, as icall target) in another module. Note that for + functions in comdat groups, there is no guarantee which copy will be + picked up by the linker. */ + + if (!c_node->needed && !DECL_COMDAT (c_node->decl)) + return; + + if (!c_node->needed) + cgraph_mark_needed_node (c_node); + + tree_init_edge_profiler (); + + FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR->succs) + { + bb = split_edge (e); + gsi = gsi_start_bb (bb); + cur_func = force_gimple_operand_gsi (&gsi, + build_addr (current_function_decl, + current_function_decl), + true, NULL_TREE, + true, GSI_SAME_STMT); + gcov_info = build_fold_addr_expr (gcov_info_decl); + cur_func_id = build_int_cst (get_gcov_unsigned_t (), + FUNC_DECL_FUNC_ID (cfun)); + stmt1 = gimple_build_call (tree_indirect_call_topn_profiler_fn, + 3, cur_func, gcov_info, cur_func_id); + gsi_insert_after (&gsi, stmt1, GSI_NEW_STMT); + gcc_assert (EDGE_COUNT (bb->succs) == 1); + add_abnormal_goto_call_edges (gsi); + } +} + + +/* Output instructions as GIMPLE trees for code to find the number of + calls at each direct call site. + BASE is offset of the counter position, CALL_STMT is the direct call + whose call-count is profiled. */ + +static void +tree_gen_dc_profiler (unsigned base, gimple call_stmt) +{ + gimple stmt1, stmt2, stmt3; + gimple_stmt_iterator gsi = gsi_for_stmt (call_stmt); + tree tmp1, tmp2, tmp3, callee = gimple_call_fn (call_stmt); + + /* Insert code: + __gcov_direct_call_counters = get_relevant_counter_ptr (); + __gcov_callee = (void *) callee; + */ + tmp1 = tree_coverage_counter_addr (GCOV_COUNTER_DIRECT_CALL, base); + tmp1 = force_gimple_operand_gsi (&gsi, tmp1, true, NULL_TREE, + true, GSI_SAME_STMT); + stmt1 = gimple_build_assign (dc_gcov_type_ptr_var, tmp1); + tmp2 = create_tmp_var (ptr_void, "PROF_dc"); + add_referenced_var (tmp2); + stmt2 = gimple_build_assign (tmp2, unshare_expr (callee)); + tmp3 = make_ssa_name (tmp2, stmt2); + gimple_assign_set_lhs (stmt2, tmp3); + stmt3 = gimple_build_assign (dc_void_ptr_var, tmp3); + gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT); + gsi_insert_before (&gsi, stmt2, GSI_SAME_STMT); + gsi_insert_before (&gsi, stmt3, GSI_SAME_STMT); +} + + +/* Output instructions as GIMPLE trees for code to find the number of + calls at each direct call site. Insert instructions at the beginning of + every possible called function. */ + +static void +tree_gen_dc_func_profiler (void) +{ + struct cgraph_node * c_node = cgraph_node (current_function_decl); + gimple_stmt_iterator gsi; + edge e; + basic_block bb; + edge_iterator ei; + gimple stmt1; + tree cur_func, gcov_info, cur_func_id; + + if (DECL_STATIC_CONSTRUCTOR (current_function_decl) + || DECL_STATIC_CONSTRUCTOR (current_function_decl) + || DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (current_function_decl)) + return; + + if (!c_node->needed && !c_node->reachable) + return; + + tree_init_edge_profiler (); + + FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR->succs) + { + bb = split_edge (e); + gsi = gsi_start_bb (bb); + cur_func = force_gimple_operand_gsi (&gsi, + build_addr (current_function_decl, + current_function_decl), + true, NULL_TREE, + true, GSI_SAME_STMT); + gcov_info = build_fold_addr_expr (gcov_info_decl); + cur_func_id = build_int_cst (get_gcov_unsigned_t (), + FUNC_DECL_FUNC_ID (cfun)); + stmt1 = gimple_build_call (tree_direct_call_profiler_fn, 3, cur_func, + gcov_info, cur_func_id); + gsi_insert_after (&gsi, stmt1, GSI_NEW_STMT); + gcc_assert (EDGE_COUNT (bb->succs) == 1); + add_abnormal_goto_call_edges (gsi); + } +} + +/* 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. */ + +static void +tree_gen_const_delta_profiler (histogram_value value ATTRIBUTE_UNUSED, + unsigned tag ATTRIBUTE_UNUSED, + unsigned base ATTRIBUTE_UNUSED) +{ + /* FIXME implement this. */ +#ifdef ENABLE_CHECKING + internal_error ("unimplemented functionality"); +#endif + 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) +{ + gimple stmt = value->hvalue.stmt; + gimple_stmt_iterator gsi = gsi_for_stmt (stmt); + tree ref_ptr = tree_coverage_counter_addr (tag, base); + gimple 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_average_profiler_fn, 2, ref_ptr, val); + gsi_insert_before (&gsi, call, GSI_NEW_STMT); + add_abnormal_goto_call_edges (gsi); +} + +/* 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) +{ + gimple stmt = value->hvalue.stmt; + gimple_stmt_iterator gsi = gsi_for_stmt (stmt); + tree ref_ptr = tree_coverage_counter_addr (tag, base); + gimple 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_ior_profiler_fn, 2, ref_ptr, val); + gsi_insert_before (&gsi, call, GSI_NEW_STMT); + add_abnormal_goto_call_edges (gsi); +} + +/* 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_tree_profiling (void) +{ + if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities) + { + tree_register_profile_hooks (); + gimple_register_value_prof_hooks (); + return true; + } + return false; +} + +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; + + /* After value profile transformation, artificial edges (that keep + function body from being deleted) won't be needed. */ + + cgraph_need_artificial_indirect_call_edges = 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 + && !flag_dyn_ipa) + tree_gen_ic_func_profiler (); + + if (flag_branch_probabilities + && flag_profile_values + && flag_value_profile_transformations) + value_profile_transformations (); + + /* The above could hose dominator info. Currently there is + none coming in, this is a safety valve. It should be + 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; +} + +/* Return true if tree-based direct-call profiling is in effect, else false. */ + +static bool +do_direct_call_profiling (void) +{ + return !flag_branch_probabilities + && (profile_arc_flag || flag_test_coverage) + && flag_dyn_ipa; +} + +/* Instrument current function to collect direct call profile information. */ + +static unsigned int +direct_call_profiling (void) +{ + basic_block bb; + gimple_stmt_iterator gsi; + + /* Add code: + extern gcov* __gcov_direct_call_counters; // pointer to actual counter + extern void* __gcov_direct_call_callee; // actual callee address + */ + if (!dc_gcov_type_ptr_var) + { + dc_gcov_type_ptr_var + = build_decl (VAR_DECL, + get_identifier ("__gcov_direct_call_counters"), + build_pointer_type (gcov_type_node)); + DECL_ARTIFICIAL (dc_gcov_type_ptr_var) = 1; + DECL_EXTERNAL (dc_gcov_type_ptr_var) = 1; + if (targetm.have_tls) + { + DECL_TLS_MODEL (dc_gcov_type_ptr_var) = + decl_default_tls_model (dc_gcov_type_ptr_var); + } + dc_void_ptr_var = + build_decl (VAR_DECL, get_identifier ("__gcov_direct_call_callee"), + ptr_void); + DECL_ARTIFICIAL (dc_void_ptr_var) = 1; + DECL_EXTERNAL (dc_void_ptr_var) = 1; + if (targetm.have_tls) + { + DECL_TLS_MODEL (dc_void_ptr_var) = + decl_default_tls_model (dc_void_ptr_var); + } + } + + add_referenced_var (gcov_info_decl); + add_referenced_var (dc_gcov_type_ptr_var); + add_referenced_var (dc_void_ptr_var); + + if (!DECL_STATIC_CONSTRUCTOR (current_function_decl)) + { + FOR_EACH_BB (bb) + for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) + { + gimple stmt = gsi_stmt (gsi); + /* Check if this is a direct call, and not a builtin call. */ + if (gimple_code (stmt) != GIMPLE_CALL + || gimple_call_fndecl (stmt) == NULL_TREE + || DECL_IS_BUILTIN (gimple_call_fndecl (stmt))) + continue; + + if (!coverage_counter_alloc (GCOV_COUNTER_DIRECT_CALL, 2)) + continue; + tree_gen_dc_profiler (0, stmt); + } + coverage_dc_end_function (); + } + + if (coverage_function_present (FUNC_DECL_FUNC_ID (cfun))) + { + tree_gen_dc_func_profiler (); + if (! flag_branch_probabilities + && flag_profile_values) + tree_gen_ic_func_topn_profiler (); + } + + return 0; +} + +struct gimple_opt_pass pass_tree_profile = +{ + { + GIMPLE_PASS, + "tree_profile", /* name */ + do_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_dump_func /* todo_flags_finish */ + } +}; + +struct gimple_opt_pass pass_direct_call_profile = +{ + { + GIMPLE_PASS, + "dc_profile", /* name */ + do_direct_call_profiling, /* gate */ + direct_call_profiling, /* execute */ + NULL, /* sub */ + NULL, /* next */ + 0, /* static_pass_number */ + TV_BRANCH_PROB, /* tv_id */ + PROP_ssa | PROP_cfg, /* properties_required */ + 0, /* properties_provided */ + 0, /* properties_destroyed */ + 0, /* todo_flags_start */ + TODO_update_ssa | 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_gen_ic_profiler, /* gen_ic_profiler */ + tree_gen_dc_profiler, /* gen_dc_profiler */ + tree_gen_average_profiler, /* gen_average_profiler */ + tree_gen_ior_profiler /* gen_ior_profiler */ +}; + +#include "gt-tree-profile.h" |