Or, you know, just get a decent compiler: http://publications.csail.mit.edu/lcs/pubs/pdf/MIT-LCS-TM-60...
Who knows maybe the trend will be 3 colors instead of two. Or maybe it'll be another instruction that's wrongly abused. Or another compiler that actually sucks, like most JS interpreters.
The idea really is to use the simplest logical approach to the problem rather than the wrong one.
In the very well known case of the alt row table, it looks to me like we're alternating odd and even, why not just code that to start with, before any optimization ?
for(t = 0; t < T; t++)
for(i = 0; i < NN; i++)
A[i%N] = 0;
_invt = (NN-1)/N;
for(t = 0; t <= T-1; t++) {
for(_Mdi = 0; _Mdi <= _invt; _Mdi++) {
_peeli = 0;
for(i = N*_Mdi; i <= min(N*_Mdi+N-1,NN-1); i++) {
A[_peeli] = 0;
_peeli = _peeli + 1;
}
}
}