Handle endianness of MSTORE & MLOAD [#79877740]

evmcc/test/mem/mstore1.evm

@@ -0,0 +1 @@
+6001600054

evmcc/test/mem/mstore1.lll

@@ -0,0 +1,6 @@
+
+(asm  ;; []
+1
+0
+MSTORE ;; [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1]
+)

libevmjit/Endianness.cpp

@@ -12,9 +12,10 @@ namespace eth
 namespace jit
 {
 
-llvm::Value* Endianness::toBE(llvm::IRBuilder<>& _builder, llvm::Value* _word)
+llvm::Value* Endianness::bswap(llvm::IRBuilder<>& _builder, llvm::Value* _word)
 {
 	// TODO: Native is Little Endian
+	assert(_word->getType() == Type::i256);
 	auto bswap = llvm::Intrinsic::getDeclaration(_builder.GetInsertBlock()->getParent()->getParent(), llvm::Intrinsic::bswap, Type::i256);
 	return _builder.CreateCall(bswap, _word);
 }

libevmjit/Endianness.h

@@ -14,7 +14,12 @@ class Endianness
 {
 public:
 
-	static llvm::Value* toBE(llvm::IRBuilder<>& _builder, llvm::Value* _word);
+	static llvm::Value* toBE(llvm::IRBuilder<>& _builder, llvm::Value* _word) { return bswap(_builder, _word); }
+
+	static llvm::Value* toNative(llvm::IRBuilder<>& _builder, llvm::Value* _word) { return bswap(_builder, _word); }
+
+private:
+	static llvm::Value* bswap(llvm::IRBuilder<>& _builder, llvm::Value* _word);
 };
 
 }

libevmjit/Memory.cpp

@@ -14,6 +14,7 @@
 #include "Type.h"
 #include "Runtime.h"
 #include "GasMeter.h"
+#include "Endianness.h"
 
 namespace dev
 {
@@ -117,12 +118,15 @@ llvm::Function* Memory::createFunc(bool _isStore, llvm::Type* _valueType, GasMet
 	{
 		llvm::Value* value = ++func->arg_begin();
 		value->setName("value");
+		if (isWord)
+			value = Endianness::toBE(m_builder, value);
 		m_builder.CreateStore(value, ptr);
 		m_builder.CreateRetVoid();
 	}
 	else
 	{
-		auto ret = m_builder.CreateLoad(ptr);
+		llvm::Value* ret = m_builder.CreateLoad(ptr);
+		ret = Endianness::toNative(m_builder, ret);
 		m_builder.CreateRet(ret);
 	}