Is there any dependence in this code?

DO I=1,N  S1 A(I+1) =F(I)  S2 F(I+1) = A(I)END DO

Is there any dependence in this code?

DO I=1,N  S1 A(I)=…  S2 …=A(I)END DO

When the dependence <S1,S2> is output-dependence

When the dependence <S1,S2> is true dependence

When the dependency <S1,S2> is anti-dependence?

Choose the correct statements for the code:

DO I=1,N  S1 A(I) = B(I) + 1   S2 B(I+1) = A(I) – 5END DO

Choose the code resulting to the loop peeling for:

p = 10; for (i=0; i<10; ++i) {     y[i] = x[i] + x[p];   p = i;} 

Choose the correct statements for this code:

S1 PI = 3.14S2 R  = 5S3 AREA = PI*R **2

What is critical code?

"Dead code" may be caused by

Loop invariant code motion