From 11e819c3764f0ba85cb0f25c22bd7a446109b199 Mon Sep 17 00:00:00 2001
From: Akash S M <akashsm@ce.iitr.ac.in>
Date: Sun, 7 Apr 2024 19:10:17 +0530
Subject: [PATCH] Add the modifies_memory macro (#1270)

* feat: add modifies_memory macro

* refactor
---
 crates/interpreter/src/instructions/opcode.rs | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/crates/interpreter/src/instructions/opcode.rs b/crates/interpreter/src/instructions/opcode.rs
index 8896c9da27..58aea3172e 100644
--- a/crates/interpreter/src/instructions/opcode.rs
+++ b/crates/interpreter/src/instructions/opcode.rs
@@ -496,6 +496,28 @@ impl OpCode {
     pub const fn get(self) -> u8 {
         self.0
     }
+
+    /// Returns true if the opcode modifies memory.
+    /// <https://bluealloy.github.io/revm/crates/interpreter/memory.html#opcodes>
+    /// <https://github.com/crytic/evm-opcodes>
+    #[inline]
+    pub const fn modifies_memory(&self) -> bool {
+        matches!(
+            *self,
+            OpCode::EXTCODECOPY
+                | OpCode::MLOAD
+                | OpCode::MSTORE
+                | OpCode::MSTORE8
+                | OpCode::MCOPY
+                | OpCode::CODECOPY
+                | OpCode::CALLDATACOPY
+                | OpCode::RETURNDATACOPY
+                | OpCode::CALL
+                | OpCode::CALLCODE
+                | OpCode::DELEGATECALL
+                | OpCode::STATICCALL
+        )
+    }
 }
 
 #[derive(Clone, Copy, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]