π The video discusses the different phases of the compiler.
π» The preprocessor converts high-level language code into pure high-level language code by embedding required header files and omitting preprocessor directives.
π The lexical analysis phase uses a lexical analyzer to generate tokens from an expression.
π The lexical analysis phase converts an arithmetic expression into a stream of tokens by assigning meanings to lexemes.
π The lexical analyzer recognizes tokens using regular expressions and rejects identifier names that start with digits.
π³ The syntax analysis phase uses context-free grammars to form a parse tree based on production rules.
π³ The video discusses the different phases of a compiler.
π The video explains the production rules for identifiers, expressions, terms, and factors.
β¨ The video demonstrates how to derive the yield of a parse tree using top-down, left-to-right traversal.
π The syntax analyzer analyzes a stream of tokens and produces a parse tree, checking for syntax errors.
π¬ The semantic analyzer verifies the parse tree for type checking, array bound checking, and scope resolution.
π» The intermediate code generator produces intermediate code from the semantically verified parse tree.
π The compiler goes through different phases, starting with the front end where it generates three address code as intermediate representation.
π In the code optimization phase, the code optimizer reduces the length of the code by optimizing the intermediate code.
π» The target code generator takes the optimized code and produces the final assembly code segment.
π The code segment involves moving values between registers, such as eax and edx, and performing arithmetic operations.
π The pointer d word ptr rbp is used to access variables b, c, and a in the code segment.
π’ By the end of the code segment, the calculated value is stored in variable x.
π The compiler consists of six phases, including lexical analysis (implemented with Lex) and syntax analysis (implemented with Yacc).
π» The first four phases are known as the front end, and the last two phases are called the back end.
π The software platform Lance C Compiler can be used to implement the front end of a C language compiler for embedded processors.
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