GetReg and GenCode: Example 3/10
reserved
u
free
reserved
0,1
2
3-11
12-15
contents
reg.
in memory
2
nowhere
a-d
u
v-z
address
var.
RAT:
AT:
GetReg: R3
Instruction: (2) v:=c-a
Properties: v, c, a: live
GenCode: load R3,c
sub  R3,a
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