> And do switch on optimization.
Ironically other references found elsewhere suffer from very same
problem. E.g. HAVEGE discussed possibilities of "collecting uncertainty
from branch predictor" with "if (A==0) A++; else A--;" but fails to
recognize that compiler is free to use conditional move instruction,
i.e. generate branch-free code. Another discusses
for(j=0; j< w; j++){
x1=l;
x2=x1*l;
x3=x1*l;
x3--;
dummy+=x3*x2/4;
}
but fails to recognize that compiler is free to *eliminate* the loop as
dummy+=w*(l*l*(l*l-1)/4).
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