I didn't look at the details you posted, but as a compiler engineer, the general statement doesn't surprise me. More complex control flow can block optimizations. Many compiler optimizations involve duplicating code in some way (loop unrolling, for example). Hence, more complex control flow can block optimizations that would increase code size.
I didn't look at the details you posted, but as a compiler engineer, the general statement doesn't surprise me. More complex control flow can block optimizations. Many compiler optimizations involve duplicating code in some way (loop unrolling, for example). Hence, more complex control flow can block optimizations that would increase code size.