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/evm/comparison.rs

@@ -0,0 +1,36 @@
+//!
+//! Translates the comparison operations.
+//!
+
+use inkwell::values::BasicValue;
+
+use crate::eravm::context::Context;
+use crate::eravm::Dependency;
+
+///
+/// Translates the comparison operations.
+///
+/// There is not difference between the EVM and LLVM IR behaviors.
+///
+pub fn compare<'ctx, D>(
+    context: &mut Context<'ctx, D>,
+    operand_1: inkwell::values::IntValue<'ctx>,
+    operand_2: inkwell::values::IntValue<'ctx>,
+    operation: inkwell::IntPredicate,
+) -> anyhow::Result<inkwell::values::BasicValueEnum<'ctx>>
+where
+    D: Dependency + Clone,
+{
+    let result = context.builder().build_int_compare(
+        operation,
+        operand_1,
+        operand_2,
+        "comparison_result",
+    )?;
+    let result = context.builder().build_int_z_extend_or_bit_cast(
+        result,
+        context.field_type(),
+        "comparison_result_extended",
+    )?;
+    Ok(result.as_basic_value_enum())
+}