FirstCompiler

First Example Compiler

The first compiler compiles a very simple expression-oriented language to MIPS assembly language. The resulting programs can be run by QtSpim.

Language Definition

• Definitions
  int x = 4;
• Assignments
  x = y;
• print Pseudo-Statement
  print x;

The Compiler

The source code for this compiler is in JBurg distributions 1.20 and later; the paths shown here are relative to BaseJBurgDirectory/docs/tutorial. To build the tutorial, use Apache ant.

This compiler has only four components:

• Driver (src/jburg/tutorial/first/Main.java)
  The driver invokes the front end parser and code generator.
• Front End grammar (src/jburg/tutorial/first/first.g)
  The lexical analyzer and source code parser.
• Code Generator grammar (src/jburg/tutorial/first/first.jbg)
  The instruction selector and code generator.
• StringTemplate manager and template library (src/jburg/tutorial/common/TemplateManager.java and src/templates/MIPS.stg)
  MIPS/SPIM assembly language snippets are found in the .stg file; TemplateManager is a convenience wrapper over the StringTemplateGroup API.

| Compiler Overview | Front End | Code Generator | Templates |