Intermediate Code Generator

Voila, we have reached the last phase ✨. ICG is the third phase of my compiler (Genepiler). It's planned to join my 'Oh My Compiler' project!

The name of this phase is a little bit misleading. The phase compacted the last three phases of a typical compiler (Intermediate Code Generator - Code Optimizer - Target Code Generation).

This phase takes the lexemes from the first phase along with the actions from the second phase and produces java code 🙌

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Table of Contents:

• Easy Steps
• Tasks
  • New Tasks
• Bugs
• Notes

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Easy Steps:

• Step one : Token
• Step two : Parse tree
• Step three: AST
• Step Four: IC

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Tasks

• build parsing tree

• show tree

• simplify tree

• add lexemes

• make sure to delete nodes (free/del)

• lift operands up

• build AST

• swap relop with 2 conditions (>=) --> !(<)

• IC

• backpatching

• remove duplicate labels (at most 2)

• remove print logs

• consider module file to add your modules in

• optimize backpatching

• add arguments (argparse)

• consider add directory for input and directory for output

• report

New Tasks:

• fix bugs
• consider generalizing the last phase

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Bugs 🐞:

🤔 I believe I've fixed most of the bugs (maybe all of the them).

• check_type is not working properly in some cases

added a couple of lines to fix it temporarily

• get_val_2 & get_virtual shall be combined. Yet, some functions are not working then

• try to add flag
  
• let it return a list of virtual nodes to work with separately

• do not declare multiple (seems to get something wrong) - check logic [not informative]

• backpatching not working when no labels

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Notes

• what if num is neg (is that handled?)
• handle range to be general (check phase 1)

Running Jasmin

1. put your code in .j file
2. run the folowing command bash java -jar jasmin.jar file.j
3. now a class file is generated, to run: java file

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[Memory] Plan (schedule)

• Today: 14 May
• Actual Deadline: 30 May 6 Jun
• Phase Deadline: 20 May

3 days to just implement this
1 day for the report

Schedule:

• 14 May 2020 Getting to know what's going on
• 15 - 20 May 2020 : Build the program