custom ir

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>

crates/compilation-target/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "revive-compilation-target"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+inkwell = { workspace = true }

crates/compilation-target/src/environment.rs

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+use inkwell::{builder::Builder, module::Module, values::FunctionValue};
+
+/// [Environment] describes EVM runtime functionality.
+pub trait Environment<'ctx> {
+    const STACK_SIZE: u32 = 1024 * 32;
+    const CALLDATA_SIZE: u32 = 0x10000;
+    const RETURNDATA_SIZE: u32 = 0x10000;
+    const MEMORY_SIZE: u32 = 0x100000;
+
+    /// Build a module containing all required runtime exports and imports.
+    ///
+    /// The `start` function is the entrypoint to the contract logic.
+    /// The returned `Module` is expected to call `start` somewhere.
+    fn call_start(&'ctx self, builder: &Builder<'ctx>, start: FunctionValue<'ctx>) -> Module<'ctx>;
+}

crates/compilation-target/src/lib.rs

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+pub mod environment;
+pub mod target;

crates/compilation-target/src/target.rs

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+use inkwell::{
+    context::Context,
+    module::Module,
+    targets::{CodeModel, RelocMode},
+    OptimizationLevel,
+};
+
+pub trait Target<'ctx> {
+    const TARGET_NAME: &'ctx str;
+    const TARGET_TRIPLE: &'ctx str;
+    const TARGET_FEATURES: &'ctx str;
+    const CPU: &'ctx str;
+    const RELOC_MODE: RelocMode = RelocMode::Default;
+    const CODE_MODEL: CodeModel = CodeModel::Default;
+
+    fn initialize_llvm() {
+        inkwell::targets::Target::initialize_riscv(&Default::default());
+    }
+
+    fn context(&self) -> &Context;
+
+    fn libraries(&'ctx self) -> Vec<Module<'ctx>>;
+
+    fn link(&self, blob: &[u8]) -> Vec<u8>;
+
+    fn optimization_level(&self) -> OptimizationLevel;
+}