perf(evm): skip zero-size calldata and code copies

src/compiler/evm_frontend/evm_mir_compiler.cpp

@@ -4552,6 +4552,10 @@ typename EVMMirBuilder::Operand EVMMirBuilder::handleCodeSize() {
 void EVMMirBuilder::handleCodeCopy(Operand DestOffsetComponents,
                                    Operand OffsetComponents,
                                    Operand SizeComponents) {
+  if (SizeComponents.isConstU64() && SizeComponents.getConstValue()[0] == 0) {
+    return;
+  }
+
   const auto &RuntimeFunctions = getRuntimeFunctionTable();
   normalizeOffsetWithSize(DestOffsetComponents, SizeComponents);
   uint64_t Non64Value = std::numeric_limits<uint64_t>::max();
@@ -6715,6 +6719,10 @@ MInstruction *EVMMirBuilder::getCurrentInstancePointer() {
 void EVMMirBuilder::handleCallDataCopy(Operand DestOffsetComponents,
                                        Operand OffsetComponents,
                                        Operand SizeComponents) {
+  if (SizeComponents.isConstU64() && SizeComponents.getConstValue()[0] == 0) {
+    return;
+  }
+
   const auto &RuntimeFunctions = getRuntimeFunctionTable();
   uint64_t Non64Value = std::numeric_limits<uint64_t>::max();
   normalizeOperandU64(DestOffsetComponents, &Non64Value);

tests/evm_asm/calldatacopy_zero_size.easm

@@ -0,0 +1,11 @@
+// CALLDATACOPY with size 0 must not access or expand memory
+PUSH1 0x2a
+PUSH1 0x00
+MSTORE
+PUSH1 0x00
+PUSH32 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+PUSH1 0x00
+CALLDATACOPY
+PUSH1 0x20
+PUSH1 0x00
+RETURN

tests/evm_asm/calldatacopy_zero_size.evm.hex

@@ -0,0 +1 @@
+602A60005260007FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF60003760206000F3

tests/evm_asm/calldatacopy_zero_size.expected

@@ -0,0 +1,8 @@
+status: success
+error_code: 0
+stack: []
+memory: '000000000000000000000000000000000000000000000000000000000000002A'
+storage: {}
+transient_storage: {}
+return: '000000000000000000000000000000000000000000000000000000000000002A'
+events: []