CPU//register

- A small, ultra-fast storage cell inside the core — typically 32 or 64 bits wide.

A small, ultra-fast storage cell inside the core — typically 32 or 64 bits wide.

Holds operands for the ALU, return addresses, stack pointers, and status flags.

ARM architectures expose 16–31 general-purpose registers; x86 has historically fewer, relying more on stack and memory.

Register pressure directly affects compiler optimization quality.