1 /* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_ADLC_ADLPARSE_HPP 26 #define SHARE_VM_ADLC_ADLPARSE_HPP 27 28 // ADLPARSE.HPP - Definitions for Architecture Description Language Parser 29 // Authors: Chris Vick and Mike Paleczny 30 31 // Class List 32 class Form; 33 // ***** Top Level, 1, classes ***** 34 class InstructForm; 35 class OperandForm; 36 class OpClassForm; 37 class AttributeForm; 38 class RegisterForm; 39 class PipelineForm; 40 class SourceForm; 41 class Peephole; 42 // ***** Level 2 classes ***** 43 class Component; 44 class Predicate; 45 class MatchRule; 46 class Encode; 47 class Attribute; 48 class Effect; 49 class ExpandRule; 50 class RewriteRule; 51 class Constraint; 52 class ConstructRule; 53 // ***** Register Section ***** 54 class RegDef; 55 class RegClass; 56 class CodeSnippetRegClass; 57 class ConditionalRegClass; 58 class AllocClass; 59 class ResourceForm; 60 // ***** Pipeline Section ***** 61 class PipeDesc; 62 class PipeClass; 63 class RegList; 64 // ***** Peephole Section ***** 65 class PeepMatch; 66 class PeepConstraint; 67 class PeepReplace; 68 69 // class ostream; // ostream is a typedef in some systems 70 71 extern char *toUpper(const char *str); 72 73 //---------------------------ADLParser----------------------------------------- 74 class ADLParser { 75 protected: 76 char *_curline; // Start of current line 77 char *_ptr; // Pointer into current location in File Buffer 78 char _curchar; // Current character from buffer 79 FormDict &_globalNames; // Global names 80 81 enum { _preproc_limit = 20 }; 82 int _preproc_depth; // How deep are we into ifdefs? 83 int _preproc_not_taken; // How deep in not-taken ifdefs? 84 bool _preproc_taken[_preproc_limit]; // Are we taking this ifdef level? 85 bool _preproc_else[_preproc_limit]; // Did this level have an else yet? 86 87 // ***** Level 1 Parse functions ***** 88 void instr_parse(void); // Parse instruction definitions 89 void oper_parse(void); // Parse operand definitions 90 void opclass_parse(void); // Parse operand class definitions 91 void ins_attr_parse(void); // Parse instruction attrubute definitions 92 void op_attr_parse(void); // Parse operand attrubute definitions 93 void source_parse(void); // Parse source section 94 void source_hpp_parse(void); // Parse source_hpp section 95 void reg_parse(void); // Parse register section 96 void encode_parse(void); // Parse encoding section 97 void frame_parse(void); // Parse frame section 98 void pipe_parse(void); // Parse pipeline section 99 void definitions_parse(void); // Parse definitions section 100 void peep_parse(void); // Parse peephole rule definitions 101 void preproc_line(void); // Parse a #line statement 102 void preproc_define(void); // Parse a #define statement 103 void preproc_undef(void); // Parse an #undef statement 104 105 // Helper functions for instr_parse(). 106 void adjust_set_rule(InstructForm *instr); 107 void matchrule_clone_and_swap(MatchRule *rule, const char* instr_ident, int& match_rules_cnt); 108 109 // ***** Level 2 Parse functions ***** 110 // Parse the components of the encode section 111 void enc_class_parse(void); // Parse encoding class definition 112 void enc_class_parse_block(EncClass* encoding, char* ec_name); 113 114 // Parse the components of the frame section 115 void stack_dir_parse(FrameForm *frame); // Parse the stack direction entry 116 void sync_stack_slots_parse(FrameForm *frame); 117 void frame_pointer_parse(FrameForm *frame, bool native); 118 void interpreter_frame_pointer_parse(FrameForm *frame, bool native); 119 void inline_cache_parse(FrameForm *frame, bool native); 120 void interpreter_arg_ptr_parse(FrameForm *frame, bool native); 121 void interpreter_method_oop_parse(FrameForm *frame, bool native); 122 void cisc_spilling_operand_name_parse(FrameForm *frame, bool native); 123 void stack_alignment_parse(FrameForm *frame); 124 void return_addr_parse(FrameForm *frame, bool native); 125 void preserve_stack_parse(FrameForm *frame); 126 char *calling_convention_parse(); 127 char *return_value_parse(); 128 129 // Parse components of the register section 130 void reg_def_parse(void); // Parse register definition 131 void reg_class_parse(void); // Parse register class definition 132 void reg_class_dynamic_parse(void); // Parse dynamic register class definition 133 void alloc_class_parse(void); // Parse allocation class definition 134 135 // Parse components of the definition section 136 void int_def_parse(void); // Parse an integer definition 137 138 // Parse components of a pipeline rule 139 void resource_parse(PipelineForm &pipe); // Parse resource definition 140 void pipe_desc_parse(PipelineForm &pipe); // Parse pipeline description definition 141 void pipe_class_parse(PipelineForm &pipe); // Parse pipeline class definition 142 143 // Parse components of a peephole rule 144 void peep_match_parse(Peephole &peep); // Parse the peephole match rule 145 void peep_constraint_parse(Peephole &peep);// Parse the peephole constraints 146 void peep_replace_parse(Peephole &peep); // Parse peephole replacement rule 147 148 // Parse the peep match rule tree 149 InstructForm *peep_match_child_parse(PeepMatch &match, int parent, int &position, int input); 150 151 // Parse components of an operand and/or instruction form 152 Predicate *pred_parse(void); // Parse predicate rule 153 // Parse match rule, and internal nodes 154 MatchRule *match_parse(FormDict &operands); 155 MatchNode *matchNode_parse(FormDict &operands, int &depth, 156 int &numleaves, bool atroot); 157 MatchNode *matchChild_parse(FormDict &operands, int &depth, 158 int &numleaves, bool atroot); 159 160 Attribute *attr_parse(char *ident);// Parse instr/operand attribute rule 161 // Parse instruction encode rule 162 void ins_encode_parse(InstructForm &inst); 163 void ins_encode_parse_block(InstructForm &inst); 164 void ins_encode_parse_block_impl(InstructForm& inst, EncClass* encoding, char* ec_name); 165 // Parse instruction postalloc expand rule. 166 void postalloc_expand_parse(InstructForm &inst); 167 168 void constant_parse(InstructForm& inst); 169 void constant_parse_expression(EncClass* encoding, char* ec_name); 170 171 Opcode *opcode_parse(InstructForm *insr); // Parse instruction opcode 172 char *size_parse(InstructForm *insr); // Parse instruction size 173 Interface *interface_parse(); // Parse operand interface rule 174 Interface *mem_interface_parse(); // Parse memory interface rule 175 Interface *cond_interface_parse(); // Parse conditional interface rule 176 char *interface_field_parse(const char** format = NULL);// Parse field contents 177 178 FormatRule *format_parse(void); // Parse format rule 179 FormatRule *template_parse(void); // Parse format rule 180 void effect_parse(InstructForm *instr); // Parse effect rule 181 ExpandRule *expand_parse(InstructForm *instr); // Parse expand rule 182 RewriteRule *rewrite_parse(void); // Parse rewrite rule 183 Constraint *constraint_parse(void); // Parse constraint rule 184 ConstructRule *construct_parse(void); // Parse construct rule 185 void ins_pipe_parse(InstructForm &instr); // Parse ins_pipe rule 186 187 // ***** Preprocessor functions ***** 188 void begin_if_def(bool taken) { 189 assert(_preproc_depth < _preproc_limit, "#ifdef nesting limit"); 190 int ppn = _preproc_depth++; 191 _preproc_taken[ppn] = taken; 192 // Invariant: _preproc_not_taken = SUM !_preproc_taken[0.._preproc_depth) 193 if (!_preproc_taken[ppn]) _preproc_not_taken += 1; 194 _preproc_else[ppn] = false; 195 } 196 void invert_if_def() { 197 assert(_preproc_depth > 0, "#ifdef matching"); 198 int ppn = _preproc_depth - 1; 199 assert(!_preproc_else[ppn], "multiple #else lines"); 200 _preproc_else[ppn] = true; 201 if (!_preproc_taken[ppn]) _preproc_not_taken -= 1; 202 _preproc_taken[ppn] = !_preproc_taken[ppn]; 203 if (!_preproc_taken[ppn]) _preproc_not_taken += 1; 204 } 205 void end_if_def() { 206 assert(_preproc_depth > 0, "#ifdef matching"); 207 int ppn = --_preproc_depth; 208 if (!_preproc_taken[ppn]) _preproc_not_taken -= 1; 209 } 210 bool preproc_taken() { 211 // Return true only if there is no directive hiding this text position. 212 return _preproc_not_taken == 0; 213 } 214 // Handle a '#' token. Return true if it disappeared. 215 bool handle_preproc_token(); 216 217 // ***** Utility Functions for ADL Parser ****** 218 219 // Parse one string argument inside parens: '(' string ')' ';' 220 char *parse_one_arg(const char *description); 221 222 // Return the next identifier given a pointer into a line of the buffer. 223 char *get_ident() { return get_ident_common(true); } 224 char *get_ident_no_preproc() { return get_ident_common(false); } 225 char *get_ident_common(bool do_preproc); // Grab it from the file buffer 226 char *get_ident_dup(void); // Grab a duplicate of the identifier 227 char *get_ident_or_literal_constant(const char* description); 228 // Grab unique identifier from file buffer 229 char *get_unique_ident(FormDict &dict, const char *nameDescription); 230 // Return the next replacement variable identifier 231 char *get_rep_var_ident(void); 232 // Skip first '$' and make a duplicate of the string 233 char *get_rep_var_ident_dup(void); 234 // Return the next token given as a signed integer. 235 int get_int(void); 236 // Return the next token, a relational operator { ==, !=, <=, >= } 237 char *get_relation_dup(void); 238 239 void get_oplist(NameList ¶meters, FormDict &operands);// Parse type-operand pairs 240 void get_effectlist(FormDict &effects, FormDict &operands, bool& has_call); // Parse effect-operand pairs 241 // Return the contents of a parenthesized expression. 242 // Requires initial '(' and consumes final ')', which is replaced by '\0'. 243 char *get_paren_expr(const char *description, bool include_location = false); 244 // Return expression up to next stop-char, which terminator replaces. 245 // Does not require initial '('. Does not consume final stop-char. 246 // Final stop-char is left in _curchar, but is also is replaced by '\0'. 247 char *get_expr(const char *description, const char *stop_chars); 248 char *find_cpp_block(const char *description); // Parse a C++ code block 249 // Issue parser error message & go to EOL 250 void parse_err(int flag, const char *fmt, ...); 251 // Create a location marker for this file and line. 252 char *get_line_string(int linenum = 0); 253 // Return a location marker which tells the C preprocessor to 254 // forget the previous location marker. (Requires awk postprocessing.) 255 char *end_line_marker() { return (char*)"\n#line 999999\n"; } 256 257 // Return pointer to current character 258 inline char cur_char(void); 259 // Advance to next character, assign this to _curchar 260 inline void next_char(void); 261 inline void next_char_or_line(void); 262 // Advance File Buffer to next line, updating _curline 263 inline void next_line(void); 264 // Issue an error if we are not at the beginning of a line (exc. whitespace). 265 void ensure_start_of_line(void); 266 // Issue an error if we are not at the end of a line (exc. whitespace). 267 void ensure_end_of_line(void); 268 // Skip whitespace, leaving ptr pointing to first non-whitespace character 269 // Also handle preprocessor constructs like "#ifdef". 270 void skipws() { skipws_common(true); } 271 // Skip comments and spaces but not newlines or preprocessor constructs. 272 void skipws_no_preproc() { skipws_common(false); } 273 void skipws_common(bool do_preproc); 274 275 FileBuff &_buf; // File buffer to be parsed 276 ArchDesc &_AD; // Architecture Description being built 277 278 public: 279 280 ADLParser(FileBuff &buf, ArchDesc &archDesc); // Create new ADLParser object 281 ~ADLParser(); // Destroy ADLParser object 282 283 void parse(void); // Do the parsing & build forms lists 284 285 int linenum() { return _buf.linenum(); } 286 287 static bool is_literal_constant(const char *hex_string); 288 static bool is_hex_digit(char digit); 289 static bool is_int_token(const char* token, int& intval); 290 static bool equivalent_expressions(const char* str1, const char* str2); 291 static void trim(char* &token); // trim leading & trailing spaces 292 }; 293 294 #endif // SHARE_VM_ADLC_ADLPARSE_HPP