rename target to polkavm

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

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

@@ -0,0 +1,44 @@
+//! The LLVM IR generator Solidity data.
+
+use std::collections::BTreeMap;
+
+/// The LLVM IR generator Solidity data.
+/// Describes some data that is only relevant to Solidity.
+#[derive(Debug, Default)]
+pub struct SolidityData {
+    /// The immutables identifier-to-offset mapping. Is only used by Solidity due to
+    /// the arbitrariness of its identifiers.
+    immutables: BTreeMap<String, usize>,
+}
+
+impl SolidityData {
+    /// A shortcut constructor.
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    /// Returns the current number of immutables values in the contract.
+    pub fn immutables_size(&self) -> usize {
+        self.immutables.len() * revive_common::BYTE_LENGTH_FIELD
+    }
+
+    /// Allocates memory for an immutable value in the auxiliary heap.
+    /// If the identifier is already known, just returns its offset.
+    pub fn allocate_immutable(&mut self, identifier: &str) -> usize {
+        let number_of_elements = self.immutables.len();
+        let new_offset = number_of_elements * revive_common::BYTE_LENGTH_FIELD;
+        *self
+            .immutables
+            .entry(identifier.to_owned())
+            .or_insert(new_offset)
+    }
+
+    /// Gets the offset of the immutable value.
+    /// If the value is not yet allocated, then it is done forcibly.
+    pub fn get_or_allocate_immutable(&mut self, identifier: &str) -> usize {
+        match self.immutables.get(identifier).copied() {
+            Some(offset) => offset,
+            None => self.allocate_immutable(identifier),
+        }
+    }
+}