Implement CODESIZE

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

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

@@ -1234,10 +1234,17 @@ where
     }
 
     /// Returns the register witdh sized type.
-    pub fn sentinel_pointer(&self) -> inkwell::values::PointerValue<'ctx> {
-        self.xlen_type()
+    pub fn sentinel_pointer(&self) -> Pointer<'ctx> {
+        let sentinel_pointer = self
+            .xlen_type()
             .const_all_ones()
-            .const_to_pointer(self.llvm().ptr_type(Default::default()))
+            .const_to_pointer(self.llvm().ptr_type(Default::default()));
+
+        Pointer::new(
+            sentinel_pointer.get_type(),
+            AddressSpace::Stack,
+            sentinel_pointer,
+        )
     }
 
     /// Returns the runtime value width sized type.

crates/llvm-context/src/polkavm/evm/call.rs

@@ -35,7 +35,7 @@ where
     let value_pointer = if let Some(value) = value {
         let value_pointer = context.build_alloca(context.value_type(), "value");
         context.build_store(value_pointer, value)?;
-        value_pointer.value
+        value_pointer
     } else {
         context.sentinel_pointer()
     };
@@ -66,8 +66,8 @@ where
     .next(address_pointer.value)?
     .next(gas)?
     .skip()
-    .next(context.sentinel_pointer())?
-    .next(value_pointer)?
+    .next(context.sentinel_pointer().value)?
+    .next(value_pointer.value)?
     .next(input_pointer.value)?
     .next(input_length)?
     .next(output_pointer.value)?

crates/llvm-context/src/polkavm/evm/create.rs

@@ -66,14 +66,14 @@ where
     .next(code_hash_pointer.value)?
     .skip()
     .skip()
-    .next(context.sentinel_pointer())?
+    .next(context.sentinel_pointer().value)?
     .next(value_pointer.value)?
     .next(input_data_pointer.value)?
     .next(input_length)?
     .next(address_pointer.value)?
     .next(address_length_pointer.value)?
-    .next(context.sentinel_pointer())?
-    .next(context.sentinel_pointer())?
+    .next(context.sentinel_pointer().value)?
+    .next(context.sentinel_pointer().value)?
     .next(salt_pointer.value)?
     .next(
         context

crates/llvm-context/src/polkavm/evm/ext_code.rs

@@ -6,16 +6,23 @@ use crate::polkavm::context::Context;
 use crate::polkavm::Dependency;
 use crate::polkavm_const::runtime_api;
 
-/// Translates the `extcodesize` instruction.
+/// Translates the `extcodesize` instruction if `address` is `Some`.
+/// Otherwise, translates the `codesize` instruction.
 pub fn size<'ctx, D>(
     context: &mut Context<'ctx, D>,
-    address: inkwell::values::IntValue<'ctx>,
+    address: Option<inkwell::values::IntValue<'ctx>>,
 ) -> anyhow::Result<inkwell::values::BasicValueEnum<'ctx>>
 where
     D: Dependency + Clone,
 {
-    let address_pointer = context.build_alloca(context.word_type(), "value");
-    context.build_store(address_pointer, address)?;
+    let address_pointer = match address {
+        Some(address) => {
+            let address_pointer = context.build_alloca(context.word_type(), "value");
+            context.build_store(address_pointer, address)?;
+            address_pointer
+        }
+        None => context.sentinel_pointer(),
+    };
 
     let address_pointer_casted = context.builder().build_ptr_to_int(
         address_pointer.value,