Loads

Consider the sequence:

LD(r1, 0, r4)

ADD(r1, r4, r5)

XOR(r3, r4, r6)

LD

ADD

XOR

LD

ADD

XOR

LD

ADD

XOR

LD

ADD

XOR

i

i + 1

i + 4

i + 5

i + 6

IF

RF

ALU

WB

r4 written

r4 read 1

r4 read 2

Problem 1

Problem 2

Can relegate both problems to compiler.

Can bypass paths fix both r4 read

problems?

i + 3

i + 2

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