Regehr: GCC 4.8 Breaks Broken SPEC 2006 Benchmarks

a 'expression always evaluates to true' or 'expression always evaluates to true' warning. It might be a pain for bits of code that you want the compiler to remove.

I sometimes use code like:

int a[] = {6,8,3};
...
for (int i=0; i<(sizeof(a)/sizeof(int)); i++){
done_stuff_with(a[i]);
}
...

maybe because i want to check if a particle in a simulation is in one of my regions of interest. I may often modify a, and then recompile the code (in my work its not unusual to recompile code before each run). Sometimes a will just be {}, so i would like the compiler remove the loop.