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#define f1(i) ((i)*(i))
#define I2(f, n) f(n) + f(n+1)
#define I3(f, n) I2(f, n) + f(n+2)
#define FL_f1(i) ((i)*(i))
#define FL_I2(f, n) f(n) + f(n+0.2)
#define FL_I3(f, n) FL_I2(f, n) + f(n+0.5)
void main()
{
int f1 = 4;
int f2 = f1;
int f3 = f1(3);
int f4 = I2(f1, 0);
int f5 = I3(f1, 0);
highp float fl_f5 = FL_I3(FL_f1, 0.1);
}
// f5 = I3(f1, 0)
// = I2(f1, 0) + f1(0 + 2)
// = f1(0) + f1(0+1) + f1(0+2)
// = 0*0 + 1*1 + 2*2
// = 5
// fl_f5 = FL_I3(FL_f1, 0.1)
// = FL_I2(FL_f1, 0.1) + FL_f1(0.1 + 0.5)
// = FL_f1(0.1) + FL_f1(0.1 + 0.2) + FL_f1(0.1 + 0.5)
// = 0.1*0.1 + 0.3*0.3 + 0.6*0.6
// = 0.46
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