[glowcoil]

> The model of treating each variable as stack-allocated until proven (potentially fallaciously) otherwise is distinctly C brain damage.

OK, let's consider block-local variables to have indeterminate storage location unless their address is taken. It doesn't substantively change the situation. Sometimes the compiler will store that variable in a register, sometimes it won't store it anywhere at all (if it gets constant-folded away), and sometimes it will store it on the stack. In the last case, it will generate and optimize code under the assumption that no aliasing loads or stores are being performed at that location on the stack, so we're back where we started.