I'm reading the book crafting a compiler with c by Charles N. Fischer. here are some notes from the book. quotation marks signify a direct text-grab from the book. i hope this notes could later become someting useful for me or someone else. All credit goes to him, im publishing this as notes, no a "direct copy" of the book. Graphs and everything are based on the ones included on the book. Please go buy the book if these notes were useful to you.
"A compiler must perform two major tasks: analysis of the source program being compiled and synthesis of a machine-language program that when executed will correctly perform the activities described by that source program." - Fischer
\usetikzlibrary{shapes.geometric, arrows}
\tikzstyle{rect} = [rectangle, minimum width=3cm, minimum height=2cm,text centered, draw=black]
\tikzstyle{arrow} = [thick,->,>=stealth]
\tikzstyle{darrow} = [dashed,thick,->,>=stealth]
\begin{document}
\begin{tikzpicture}[]
\node (scanner) [rect] {Scanner};
\node (parser) [rect, xshift=5cm] {Parser};
\node (semantic routines) [rect, xshift=10cm] {Semantic Routines};
\node (optimizer) [rect, xshift=10cm, yshift=-5cm] {Optimizer};
\node (code generator) [rect, xshift=10cm, yshift=-10cm] {Code Generator};
\node (tables) [rect, yshift=-5cm, align=center] {Symbol and \\ Attribute \\ Tables};
\node[text width=3cm] (sex) [yshift=-6.5cm, align=center] { (Used by all phases of the compiler) };
\node[text width=3cm] (target) [xshift=10cm , yshift=-13.5cm, align=center] { Target Machine \\ Code };
\draw [arrow, align=left] (scanner) -- node {Tokens \\} (parser);
\draw [arrow, align=left] (parser) -- node[anchor=south] {Syntactic \\ Structure} (semantic routines);
\draw [arrow, align=left] (semantic routines) -- node[anchor=east] {Intermediate \\ Representation} (optimizer) coordinate[midway] (aux1){};
\draw [arrow] (optimizer) -- (code generator) coordinate[midway] (aux2){};
\draw [arrow] (code generator) -- (target);
\draw [arrow, align=center] (-5cm,0cm) -- node {Source Program \\\\ (Character Stream)} (scanner);
\draw [darrow] (aux1) -- ([xshift=2cm]aux1.south) -- ([xshift=2cm]aux2.south) -- (aux2);
\end{tikzpicture}
\end{document}(Figure 1.3)
Scanner - Reads the input and generates tokens Parser - Builds a syntax tree to drive semantic processing Semantic Routines - Check semantics (correct variable types, etc) and generate IR code after.