/usr/lib/gcc-cross/powerpc64-linux-gnu/7/plugin/include/ipa-icf-gimple.h is in gcc-7-plugin-dev-powerpc64-linux-gnu 7.3.0-16ubuntu3cross1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 | /* Interprocedural semantic function equality pass
Copyright (C) 2014-2017 Free Software Foundation, Inc.
Contributed by Jan Hubicka <hubicka@ucw.cz> and Martin Liska <mliska@suse.cz>
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/>. */
/* Gimple identical code folding (class func_checker) is an infastructure
capable of comparing two given functions. The class compares every
gimple statement and uses many dictionaries to map source and target
SSA_NAMEs, declarations and other components.
To use the infrastructure, create an instanse of func_checker and call
a comparsion function based on type of gimple statement. */
/* Prints string STRING to a FILE with a given number of SPACE_COUNT. */
#define FPUTS_SPACES(file, space_count, string) \
fprintf (file, "%*s" string, space_count, " ");
/* fprintf function wrapper that transforms given FORMAT to follow given
number for SPACE_COUNT and call fprintf for a FILE. */
#define FPRINTF_SPACES(file, space_count, format, ...) \
fprintf (file, "%*s" format, space_count, " ", ##__VA_ARGS__);
/* Prints a MESSAGE to dump_file if exists. FUNC is name of function and
LINE is location in the source file. */
static inline void
dump_message_1 (const char *message, const char *func, unsigned int line)
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, " debug message: %s (%s:%u)\n", message, func, line);
}
/* Prints a MESSAGE to dump_file if exists. */
#define dump_message(message) dump_message_1 (message, __func__, __LINE__)
/* Logs a MESSAGE to dump_file if exists and returns false. FUNC is name
of function and LINE is location in the source file. */
static inline bool
return_false_with_message_1 (const char *message, const char *func,
unsigned int line)
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, " false returned: '%s' (%s:%u)\n", message, func, line);
return false;
}
/* Logs a MESSAGE to dump_file if exists and returns false. */
#define return_false_with_msg(message) \
return_false_with_message_1 (message, __func__, __LINE__)
/* Return false and log that false value is returned. */
#define return_false() return_false_with_msg ("")
/* Logs return value if RESULT is false. FUNC is name of function and LINE
is location in the source file. */
static inline bool
return_with_result (bool result, const char *func, unsigned int line)
{
if (!result && dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, " false returned: (%s:%u)\n", func, line);
return result;
}
/* Logs return value if RESULT is false. */
#define return_with_debug(result) return_with_result (result, __func__, __LINE__)
/* Verbose logging function logging statements S1 and S2 of a CODE.
FUNC is name of function and LINE is location in the source file. */
static inline bool
return_different_stmts_1 (gimple *s1, gimple *s2, const char *code,
const char *func, unsigned int line)
{
if (dump_file && (dump_flags & TDF_DETAILS))
{
fprintf (dump_file, " different statement for code: %s (%s:%u):\n",
code, func, line);
print_gimple_stmt (dump_file, s1, 3, TDF_DETAILS);
print_gimple_stmt (dump_file, s2, 3, TDF_DETAILS);
}
return false;
}
/* Verbose logging function logging statements S1 and S2 of a CODE. */
#define return_different_stmts(s1, s2, code) \
return_different_stmts_1 (s1, s2, code, __func__, __LINE__)
namespace ipa_icf_gimple {
/* Basic block struct for semantic equality pass. */
class sem_bb
{
public:
sem_bb (basic_block bb_, unsigned nondbg_stmt_count_, unsigned edge_count_):
bb (bb_), nondbg_stmt_count (nondbg_stmt_count_), edge_count (edge_count_) {}
/* Basic block the structure belongs to. */
basic_block bb;
/* Number of non-debug statements in the basic block. */
unsigned nondbg_stmt_count;
/* Number of edges connected to the block. */
unsigned edge_count;
};
/* A class aggregating all connections and semantic equivalents
for a given pair of semantic function candidates. */
class func_checker
{
public:
/* Initialize internal structures for a given SOURCE_FUNC_DECL and
TARGET_FUNC_DECL. Strict polymorphic comparison is processed if
an option COMPARE_POLYMORPHIC is true. For special cases, one can
set IGNORE_LABELS to skip label comparison.
Similarly, IGNORE_SOURCE_DECLS and IGNORE_TARGET_DECLS are sets
of declarations that can be skipped. */
func_checker (tree source_func_decl, tree target_func_decl,
bool compare_polymorphic,
bool ignore_labels = false,
hash_set<symtab_node *> *ignored_source_nodes = NULL,
hash_set<symtab_node *> *ignored_target_nodes = NULL);
/* Memory release routine. */
~func_checker();
/* Function visits all gimple labels and creates corresponding
mapping between basic blocks and labels. */
void parse_labels (sem_bb *bb);
/* Basic block equivalence comparison function that returns true if
basic blocks BB1 and BB2 correspond. */
bool compare_bb (sem_bb *bb1, sem_bb *bb2);
/* Verifies that trees T1 and T2 are equivalent from perspective of ICF. */
bool compare_ssa_name (tree t1, tree t2);
/* Verification function for edges E1 and E2. */
bool compare_edge (edge e1, edge e2);
/* Verifies for given GIMPLEs S1 and S2 that
call statements are semantically equivalent. */
bool compare_gimple_call (gcall *s1, gcall *s2);
/* Verifies for given GIMPLEs S1 and S2 that
assignment statements are semantically equivalent. */
bool compare_gimple_assign (gimple *s1, gimple *s2);
/* Verifies for given GIMPLEs S1 and S2 that
condition statements are semantically equivalent. */
bool compare_gimple_cond (gimple *s1, gimple *s2);
/* Verifies for given GIMPLE_LABEL stmts S1 and S2 that
label statements are semantically equivalent. */
bool compare_gimple_label (const glabel *s1, const glabel *s2);
/* Verifies for given GIMPLE_SWITCH stmts S1 and S2 that
switch statements are semantically equivalent. */
bool compare_gimple_switch (const gswitch *s1, const gswitch *s2);
/* Verifies for given GIMPLE_RETURN stmts S1 and S2 that
return statements are semantically equivalent. */
bool compare_gimple_return (const greturn *s1, const greturn *s2);
/* Verifies for given GIMPLEs S1 and S2 that
goto statements are semantically equivalent. */
bool compare_gimple_goto (gimple *s1, gimple *s2);
/* Verifies for given GIMPLE_RESX stmts S1 and S2 that
resx statements are semantically equivalent. */
bool compare_gimple_resx (const gresx *s1, const gresx *s2);
/* Verifies for given GIMPLE_ASM stmts S1 and S2 that ASM statements
are equivalent.
For the beginning, the pass only supports equality for
'__asm__ __volatile__ ("", "", "", "memory")'. */
bool compare_gimple_asm (const gasm *s1, const gasm *s2);
/* Verification function for declaration trees T1 and T2. */
bool compare_decl (tree t1, tree t2);
/* Verifies that tree labels T1 and T2 correspond. */
bool compare_tree_ssa_label (tree t1, tree t2);
/* Function compare for equality given memory operands T1 and T2. */
bool compare_memory_operand (tree t1, tree t2);
/* Function compare for equality given trees T1 and T2 which
can be either a constant or a declaration type. */
bool compare_cst_or_decl (tree t1, tree t2);
/* Function responsible for comparison of various operands T1 and T2.
If these components, from functions FUNC1 and FUNC2, are equal, true
is returned. */
bool compare_operand (tree t1, tree t2);
/* Compares GIMPLE ASM inputs (or outputs) where we iterate tree chain
and compare both TREE_PURPOSEs and TREE_VALUEs. */
bool compare_asm_inputs_outputs (tree t1, tree t2);
/* Verifies that trees T1 and T2, representing function declarations
are equivalent from perspective of ICF. */
bool compare_function_decl (tree t1, tree t2);
/* Verifies that trees T1 and T2 do correspond. */
bool compare_variable_decl (tree t1, tree t2);
/* Return true if types are compatible for polymorphic call analysis.
COMPARE_PTR indicates if polymorphic type comparsion should be
done for pointers, too. */
static bool compatible_polymorphic_types_p (tree t1, tree t2,
bool compare_ptr);
/* Return true if types are compatible from perspective of ICF.
FIRST_ARGUMENT indicates if the comparison is called for
first parameter of a function. */
static bool compatible_types_p (tree t1, tree t2);
private:
/* Vector mapping source SSA names to target ones. */
vec <int> m_source_ssa_names;
/* Vector mapping target SSA names to source ones. */
vec <int> m_target_ssa_names;
/* Source TREE function declaration. */
tree m_source_func_decl;
/* Target TREE function declaration. */
tree m_target_func_decl;
/* Source symbol nodes that should be skipped by
declaration comparison. */
hash_set<symtab_node *> *m_ignored_source_nodes;
/* Target symbol nodes that should be skipped by
declaration comparison. */
hash_set<symtab_node *> *m_ignored_target_nodes;
/* Source to target edge map. */
hash_map <edge, edge> m_edge_map;
/* Source to target declaration map. */
hash_map <tree, tree> m_decl_map;
/* Label to basic block index mapping. */
hash_map <tree, int> m_label_bb_map;
/* Flag if polymorphic comparison should be executed. */
bool m_compare_polymorphic;
/* Flag if ignore labels in comparison. */
bool m_ignore_labels;
};
} // ipa_icf_gimple namespace
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