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Register Allocation in the Go Compiler
Dive into register allocation in the Go compiler, including the register allocator's components, how it works, and its advantages and disadvantages.
For some compilers, like LLVM and Cranelift, there is sufficient documentation, including papers and presentations, to gain a deep understanding of their register allocators (RAs). Figure 3: Processing BBs and SSA values.The RA keeps track of where currently living values are located, which can be in several different registers or in memory. Using a call ABI with call-saved registers complicates the implementation of finding root pointers for Go's precise Garbage Collector, but in my opinion, the benefit of better-generated code is worth it.
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