Description
This message reports that the code is violating loop merging optimization rules.
Explanation
When there are multiple sequential loops, it can create additional latency and prevent further optimizations.
To remove this impact, use loop merging to reduce the latency. These loops should not include any non-trivial code.
The following code shows a violation of loop merging:
void top (a[4],b[4],c[4],d[4], var, ot...) {
...
Add: for (i=3;i>=0;i--) { if (d[i])
a[i] = b[i] + c[i]; }
// non-trivial code.
int h = var*a[0]*ot;
Sub: for (i=3;i>=0;i--) { if (!d[i])
a[i] = b[i] - c[i] +h ; }
...
}Solution
Consider moving the non-trivial code before or after the loops.