Code Generation

Experimental Pipeline: Direct-to-Venom

AST → vyper/codegen_venom/ → Venom IR → optimization passes → assembly → bytecode.

vyper/codegen_venom/

Translates annotated Vyper AST directly to Venom SSA IR.

• module.py — entry point, module-level codegen
• expr.py — expression translation
• stmt.py — statement translation
• arithmetic.py — numeric operations
• builtins/ — built-in function codegen
• abi/ — ABI encoding/decoding
• context.py — codegen context (variable tracking, etc.)

Venom → Assembly

After Venom IR is constructed, vyper/venom/ runs optimization passes then venom/venom_to_assembly.py emits EVM assembly. The assembler in vyper/evm/assembler/ produces final bytecode.

Default Production Pipeline: Legacy IR

AST → vyper/codegen/ → s-expression IR (IRnode) → vyper/ir/compile_ir.py → assembly → bytecode.

This is the current default. See vyper/ir/README.md for IR grammar and structure.

Key difference: legacy IR is tree-shaped s-expressions, Venom is SSA basic blocks.