Figure 1.7. Translation of an assignment statement

p = x + v * 60

Lexical Analysis

<id,1> <=> <id,2> <+> <id,3> <*> <60>

Syntax Analysis

assn

/ | \

id = expr

/ / | \

p expr + expr

| / | \

id expr * expr

| | |

x id const

| |

v 60

Semantic Analysis

=

/ \

<id,1> +

/ \

<id,2> *

/ \

<id,3> int2float

|

60

Intermediate Code

t1 = int2float(60)

t2 = id3 * t1

t3 = id2 + t2

id1 = t3

Code Optimization

t1 = id3 * 60.0

id1 = id2 + t1

Code Generator

LDF R2, id3

MULF R2, R2, #60.0

LDF R1, id2

ADDF R1, R1, R2

STF id1, R1