Is there an optimized way to use a switch() inside a fragment program? Compilers (for common processor architectures) are known to generate jump tables when switch values use an integer range (say from 0 to 5), avoiding branches in this way. I was wondering if, with modern GL (3.2, 3.3+) there are similar optimizations. For example:
int a = clamp(somevalfromsomewhere,0,2);
switch(a) {
case 0: { somecode } break;
case 1: { someothercode } break;
case 2: { someothercode } break;
}
A C compiler is often smart enough to detect this and generate a jump table. Does this optimization commonly happen in GLSL compilers?
