[Advanced Compiler Lecture Notes]
Week 03 (2003/9/29)

1. The main route
main <main.c>
  toplev_main <toplev.c>
    do_compile <toplev.c>
      compile_file <toplev.c>
        (*lang_hooks.parse_file) <toplev.c> = c_common_parse_file <c-lex.c>
          yyparse <c-parse.c>
            YYLEX <c-parse.c> = yylex <c-parse.c>
              _yylex <c-parse.c>
                c_lex <c-lex.c>
                  cpp_get_token(parse_in) <cppmacro.c>

2.
The scanner of gcc: hand-written
The parser of gcc: tool-generated (yacc)

3. Two options (of gcc) are mentioned in class.
(a) -dy: to set set_yydebug to be "true", and print (to stanard error) parsing information
(b) -fdump-translation-unit: to print the tree format (to a particular file)
Example:
./gcc -dy -fdump-translation-unit hello.c 2> hello.c.dump
Then hello.c.dump will be the output of -dy, and hello.c.tu will be the output of -fdump-translation-unit

4. Twp sed scripts available:
	-> sed script for parsing log.
	-> sed script for converting tree structure into html format.