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https://github.com/simomux/kaleidoscopecompiler
Project for my front-end compilers exam A.Y. 2023-2024
https://github.com/simomux/kaleidoscopecompiler
ast bison-flex clang kaleidoscope llvm
Last synced: 4 days ago
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Project for my front-end compilers exam A.Y. 2023-2024
- Host: GitHub
- URL: https://github.com/simomux/kaleidoscopecompiler
- Owner: simomux
- Created: 2024-03-18T14:22:36.000Z (11 months ago)
- Default Branch: main
- Last Pushed: 2024-06-09T12:39:33.000Z (8 months ago)
- Last Synced: 2025-02-05T11:49:51.564Z (4 days ago)
- Topics: ast, bison-flex, clang, kaleidoscope, llvm
- Language: C++
- Homepage:
- Size: 473 KB
- Stars: 0
- Watchers: 1
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Assignment for my front-end compilers class A.Y. 2023-2024
## Objective
Create a front-end compiler for Kaleidoscope extending the skeleton template from a modified version of the code from [My First Language Frontend with LLVM Tutorial](https://llvm.org/docs/tutorial/MyFirstLanguageFrontend/index.html).
The assignment is divided in 4 parts, each one giving you a grammar and reuqiring the implementation of it and of the necessaries AST nodes.
### First level grammar
Fisrt part requires to implement assignment logic for variables.
Grammar
```bison
% start startsymb;
startsymb:
program
program:
% empty
| top ";" program % left ":";
top:
% empty
| definition
| external
| globalvar
definition:
"def" proto block
external:
"extern" proto
proto:
"id" "(" idseq ")"
globalvar :
" global " "id"
idseq :
% empty
| "id" idseq
%left ":";
%left " <" "==";
%left "+" " -";
%left "*" "/";
stmts :
stmt
| stmt ";" stmts
stmt :
assignment
| block
| exp
assignment
"id" "=" exp
block:
"{" stmts "}"
| "{" vardefs ";" stmts "}"
vardefs:
binding
| vardefs ";" binding
binding:
"var" "id" initexp
exp:
exp "+" exp
| exp " -" exp
| exp "*" exp
| exp "/" exp
| idexp
| "(" exp ")"
| "number"
| expif
initexp:
%empty
| "=" exp
expif:
condexp "?" exp ":" exp
condexp:
exp "<" exp
| exp "==" exp
idexp:
"id"
| "id" "(" optexp ")"
optexp:
%empty
| explist
explist:
exp
| exp "," explist
```
### Second level grammar
Implements rules and logic for `if` construct, `for` loops and initializations.
```bison
stmt:
assignment
| block
| ifstmt
| forstmt
| exp
ifstmt:
"if" "(" condexp ")" stmt
| "if" "(" condexp ")" stmt " else " stmt
forstmt:
"for" "(" init ";" condexp ";" assignment ")" stmt
init:
binding
| assignment
```
### Third level grammar
Implements boolean operators `and`, `or` and `not` for consecutive conditional expressions.
```bison
condexp:
relexp
| relexp "and" condexp
| relexp "or" condexp
| "not" condexp
| "(" condexp ")"
relexp:
exp "<" exp
| exp "==" exp
```
### Fourth level grammar
TODO
```bison
binding:
"var" "id" initexp
| "var" "id" "[" "number" "]"
| "var" "id" "[" "number" "]" "=" "{" explist "}"
idexp:
"id"
| "id" "(" optexp ")"
| "id" "[" exp "]"
assignment:
"id" "=" exp
| "id" "[" exp "]" "=" exp
```