Lexicon Entry
Register Allocation
The compiler phase that maps an unlimited number of virtual registers to the finite set of physical CPU registers.
Related Knowledge & Cross-References
Guide
Register Allocation in Compilers: How Variables Fit into CPU Registers
Discover how compilers solve register allocation — mapping thousands of virtual registers to 16 (x86-64) or 31 (ARM64) physical ones. See graph coloring, spilling, and rematerialization with real Godbolt examples.