Emerge Yul recompiler (#1)

Provide a modified (and incomplete) version of ZKSync zksolc that can compile the most basic contracts

crates/llvm-context/src/eravm/context/pointer.rs

@@ -0,0 +1,137 @@
+//!
+//! The LLVM pointer.
+//!
+
+use inkwell::types::BasicType;
+
+use crate::eravm::context::address_space::AddressSpace;
+use crate::eravm::context::global::Global;
+use crate::eravm::context::Context;
+use crate::eravm::Dependency;
+
+///
+/// The LLVM pointer.
+///
+#[derive(Debug, Clone, Copy)]
+pub struct Pointer<'ctx> {
+    /// The pointee type.
+    pub r#type: inkwell::types::BasicTypeEnum<'ctx>,
+    /// The address space.
+    pub address_space: AddressSpace,
+    /// The pointer value.
+    pub value: inkwell::values::PointerValue<'ctx>,
+}
+
+impl<'ctx> Pointer<'ctx> {
+    ///
+    /// A shortcut constructor.
+    ///
+    pub fn new<T>(
+        r#type: T,
+        address_space: AddressSpace,
+        value: inkwell::values::PointerValue<'ctx>,
+    ) -> Self
+    where
+        T: BasicType<'ctx>,
+    {
+        Self {
+            r#type: r#type.as_basic_type_enum(),
+            address_space,
+            value,
+        }
+    }
+
+    ///
+    /// Wraps a 256-bit primitive type pointer.
+    ///
+    pub fn new_stack_field<D>(
+        context: &Context<'ctx, D>,
+        value: inkwell::values::PointerValue<'ctx>,
+    ) -> Self
+    where
+        D: Dependency + Clone,
+    {
+        Self {
+            r#type: context.field_type().as_basic_type_enum(),
+            address_space: AddressSpace::Stack,
+            value,
+        }
+    }
+
+    ///
+    /// Creates a new pointer with the specified `offset`.
+    ///
+    pub fn new_with_offset<D, T>(
+        context: &Context<'ctx, D>,
+        address_space: AddressSpace,
+        r#type: T,
+        offset: inkwell::values::IntValue<'ctx>,
+        name: &str,
+    ) -> Self
+    where
+        D: Dependency + Clone,
+        T: BasicType<'ctx>,
+    {
+        assert_ne!(
+            address_space,
+            AddressSpace::Stack,
+            "Stack pointers cannot be addressed"
+        );
+
+        let value = context
+            .builder
+            .build_int_to_ptr(
+                offset,
+                context.byte_type().ptr_type(address_space.into()),
+                name,
+            )
+            .unwrap();
+        Self::new(r#type, address_space, value)
+    }
+
+    ///
+    /// Casts the pointer into another type.
+    ///
+    pub fn cast<T>(self, r#type: T) -> Self
+    where
+        T: BasicType<'ctx>,
+    {
+        Self {
+            r#type: r#type.as_basic_type_enum(),
+            address_space: self.address_space,
+            value: self.value,
+        }
+    }
+
+    pub fn address_space_cast<D>(
+        self,
+        context: &Context<'ctx, D>,
+        address_space: AddressSpace,
+        name: &str,
+    ) -> anyhow::Result<Self>
+    where
+        D: Dependency + Clone,
+    {
+        let value = context.builder().build_address_space_cast(
+            self.value,
+            self.r#type.ptr_type(address_space.into()),
+            name,
+        )?;
+
+        Ok(Self {
+            address_space,
+            value,
+            ..self
+        })
+    }
+}
+
+impl<'ctx> From<Global<'ctx>> for Pointer<'ctx> {
+    fn from(global: Global<'ctx>) -> Self {
+        Self {
+            r#type: global.r#type,
+            address_space: AddressSpace::Stack,
+            value: global.value.as_pointer_value(),
+        }
+    }
+}