adihex / cdlab_a10_20cs01019

Compiler Design - Assignment 10

Aditya Balakrishnan | 20CS01019

Extended 3 Address Code

Instructions for usage

1. make run
2. ./run <input.txt>

Grammar

S:          prog; 
prog :      GLOBAL stmtListO END;
stmtListO:  stmtList | #;
stmtList:   stmtList SEMICOLON stmt | stmt ;
stmt:       assignmentStmt | readStmt | printStmt | ifStmt | whileStmt;
assignmentStmt: ID ASSIGN exp;
readStmt:   READ ID;
printStmt:  PRINT ID;
ifStmt:     IF bExp COLON stmtList elsePart END;
elsePart:   ELSE stmtList | #;
whileStmt:  WHILE bExp COLON stmtList END;
bExp:       bExp OR bExp | bExp AND bExp | NOT bExp | LEFT_PAREN bExp RIGHT_PAREN  | exp relOP exp ;
relOP:      EQ | LE | LT | GE | GT | NE ;
exp:        exp PLUS exp  | exp MINUS exp | exp MULT exp | exp DIV exp | exp MOD exp | MINUS exp | PLUS exp | LEFT_PAREN exp RIGHT_PAREN | ID | INT_CONST;