This document contains lecture slides for CSE340 - Principles of Programming Languages. It discusses intermediate code for while loops, if statements, and switch statements. It also covers a homework assignment to translate source code to intermediate code using a switch statement. The slides were presented by Javier Gonzalez-Sanchez and include code examples, notes on symbol tables, and a review of programming assignment 4.

1. CSE340 - Principles of
Programming Languages
Lecture 23:
Intermediate Code IV
Javier Gonzalez-Sanchez
BYENG M1-38
Office Hours: By appointment

2. Javier Gonzalez-Sanchez | CSE340 | Summer 2015 | 8
Code
WHILE

3. Javier Gonzalez-Sanchez | CSE340 | Summer 2015 | 9
Code

4. Javier Gonzalez-Sanchez | CSE340 | Summer 2015 | 10
Code
IF

5. Javier Gonzalez-Sanchez | CSE340 | Summer 2015 | 11
Code

6. Javier Gonzalez-Sanchez | CSE340 | Summer 2015 | 12
Review
Programming Assignment 4
Level 3
Bonus Points: SWITCH

7. Javier Gonzalez-Sanchez | CSE340 | Summer 2015 | 13
Homework
Translate this source code to intermediate code:
int a;
switch (a) {
case 1: { print("hi”); break;}
case 2: { print("world"); break;}
default: { print(”end"); break;}
}

8. Javier Gonzalez-Sanchez | CSE340 | Summer 2015 | 14
Handwritten notes
Add the symbol table here…

9. Javier Gonzalez-Sanchez | CSE340 | Summer 2015 | 15
Homework
Assignment #4

10. Javier Gonzalez-Sanchez | CSE340 | Summer 2015 | 16
High-Level Languages
X,E,G,O,O
#e1,I,I,0,7
@
OPR 19, AX
STO x, AX
LIT 5, AX
OPR 21, AX
LOD #e1,AX
CAL 1, AX
OPR 0, AX
5
Virtual Machine
(interpreter)
// sorce code
int x;
int foo () {
read (x);
print (5);
}
main () {
foo ();
}
Lexer
Parser
Semantic Analyzer
Code Generation
01001010101000010
01010100101010010
10100100000011011
11010010110101111
00010010101010010
10101001010101011
Assembler
compilation execution

11. Javier Gonzalez-Sanchez | CSE340 | Summer 2015 | 17
Language Paradigms

12. CSE340 - Principles of Programming Languages
Javier Gonzalez-Sanchez
javiergs@asu.edu
Summer 2015
Disclaimer. These slides can only be used as study material for the class CSE340 at ASU. They cannot be distributed or used for another purpose.