RISC-V RV32 Backend

NyxLang targets RISC-V 32-bit (RV32), emitting assembly through assembler.zig.

Backend responsibilities

• Emit function prologues/epilogues
• Implement calling convention and stack frames
• Lower 3AC instructions to RV32 sequences
• Place globals in appropriate sections (if supported)

Calling convention

Document what you implement (even if simplified). Example checklist:

• how arguments are passed
• where return values go
• which registers are caller/callee-saved
• stack alignment rules you enforce

Stack frames

Typical frame tasks:

• reserve space for locals/spills
• store return address/frame pointer (if used)
• address locals via sp or fp

Debugging tips

• Start with tiny programs and compare assembly to expected behavior
• Add a mode to print IR before codegen
• Add a mode to print emitted instructions with comments mapping to IR