remove usage of llvm memory attributes

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

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

@@ -6,7 +6,6 @@ use serde::Serialize;
 /// The LLVM attribute.
 /// In order to check the real order in a new major version of LLVM, find the `Attributes.inc` file
 /// inside of the LLVM build directory. This order is actually generated during the building.
-/// FIXME: Generate this in build.rs?
 #[derive(Debug, Serialize, Deserialize, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub enum Attribute {
     Unused = 0,
@@ -82,7 +81,7 @@ pub enum Attribute {
     Writable = 70,
     WriteOnly = 71,
     ZExt = 72,
-    //LastEnumAttr = 72,
+    // LastEnumAttr = 72,
     // FirstTypeAttr = 73,
     ByRef = 73,
     ByVal = 74,
@@ -117,12 +116,7 @@ impl TryFrom<&str> for Attribute {
             "OptimizeForSize" => Ok(Attribute::OptimizeForSize),
             "NoInline" => Ok(Attribute::NoInline),
             "WillReturn" => Ok(Attribute::WillReturn),
-            "WriteOnly" => Ok(Attribute::WriteOnly),
-            "ReadNone" => Ok(Attribute::ReadNone),
-            "ReadOnly" => Ok(Attribute::ReadOnly),
             "NoReturn" => Ok(Attribute::NoReturn),
-            // FIXME: Not in Attributes.inc
-            //"InaccessibleMemOnly" => Ok(Attribute::InaccessibleMemOnly),
             "MustProgress" => Ok(Attribute::MustProgress),
             _ => Err(value.to_owned()),
         }

crates/llvm-context/src/eravm/context/function/llvm_runtime.rs

@@ -410,13 +410,6 @@ impl<'ctx> LLVMRuntime<'ctx> {
             Some(inkwell::module::Linkage::External),
         );
         Function::set_default_attributes(llvm, system_request, optimizer);
-        Function::set_attributes(
-            llvm,
-            system_request,
-            //vec![Attribute::ArgMemOnly, Attribute::ReadOnly],
-            vec![],
-            false,
-        );
 
         let external_call_arguments: Vec<inkwell::types::BasicMetadataTypeEnum> = vec![
                 llvm.custom_width_int_type(revive_common::BIT_LENGTH_FIELD as u32)

crates/llvm-context/src/eravm/context/function/mod.rs

@@ -128,6 +128,7 @@ impl<'ctx> Function<'ctx> {
     ) {
         for attribute_kind in attributes.into_iter() {
             match attribute_kind {
+                Attribute::Memory => todo!("`memory` attributes are not yet implemented"),
                 attribute_kind @ Attribute::AlwaysInline if force => {
                     let is_optimize_none_set = declaration
                         .value
@@ -251,8 +252,6 @@ impl<'ctx> Function<'ctx> {
             vec![
                 Attribute::MustProgress,
                 Attribute::NoUnwind,
-                // FIXME: LLVM complains about ReadNone being not valid for fns
-                // Attribute::ReadNone,
                 Attribute::WillReturn,
             ],
             false,