rename target to polkavm

Signed-off-by: xermicus <cyrill@parity.io>

crates/llvm-context/src/polkavm/context/argument.rs

@@ -0,0 +1,64 @@
+//! The LLVM argument with metadata.
+
+/// The LLVM argument with metadata.
+#[derive(Debug, Clone)]
+pub struct Argument<'ctx> {
+    /// The actual LLVM operand.
+    pub value: inkwell::values::BasicValueEnum<'ctx>,
+    /// The original AST value. Used mostly for string literals.
+    pub original: Option<String>,
+    /// The preserved constant value, if available.
+    pub constant: Option<num::BigUint>,
+}
+
+impl<'ctx> Argument<'ctx> {
+    /// The calldata offset argument index.
+    pub const ARGUMENT_INDEX_CALLDATA_OFFSET: usize = 0;
+
+    /// The calldata length argument index.
+    pub const ARGUMENT_INDEX_CALLDATA_LENGTH: usize = 1;
+
+    /// A shortcut constructor.
+    pub fn new(value: inkwell::values::BasicValueEnum<'ctx>) -> Self {
+        Self {
+            value,
+            original: None,
+            constant: None,
+        }
+    }
+
+    /// A shortcut constructor.
+    pub fn new_with_original(
+        value: inkwell::values::BasicValueEnum<'ctx>,
+        original: String,
+    ) -> Self {
+        Self {
+            value,
+            original: Some(original),
+            constant: None,
+        }
+    }
+
+    /// A shortcut constructor.
+    pub fn new_with_constant(
+        value: inkwell::values::BasicValueEnum<'ctx>,
+        constant: num::BigUint,
+    ) -> Self {
+        Self {
+            value,
+            original: None,
+            constant: Some(constant),
+        }
+    }
+
+    /// Returns the inner LLVM value.
+    pub fn to_llvm(&self) -> inkwell::values::BasicValueEnum<'ctx> {
+        self.value
+    }
+}
+
+impl<'ctx> From<inkwell::values::BasicValueEnum<'ctx>> for Argument<'ctx> {
+    fn from(value: inkwell::values::BasicValueEnum<'ctx>) -> Self {
+        Self::new(value)
+    }
+}