GetReg and GenCode: Example 4/10
reserved
u
v
free
Reserved
0,1
2
3
3-11
12-15
contents
reg.
in memory
2
3
nowhere
a-d
u
v
w-z
address
var.
RAT:
AT:
GetReg: R2
Instruction: (3) w:=u+v
Properties: w: live; u, v: dead
GenCode: add R2,R3
33/43