Get endianess from LLVM

libevmjit/Endianness.cpp

@@ -2,6 +2,7 @@
 
 #include "preprocessor/llvm_includes_start.h"
 #include <llvm/IR/IntrinsicInst.h>
+#include <llvm/Support/Host.h>
 #include "preprocessor/llvm_includes_end.h"
 
 #include "Type.h"
@@ -15,13 +16,7 @@ namespace jit
 
 llvm::Value* Endianness::bswapIfLE(llvm::IRBuilder<>& _builder, llvm::Value* _word)
 {
-	union tester
-	{
-		unsigned int  x;
-		unsigned char isLE;
-	};
-
-	if (tester{1}.isLE)
+	if (llvm::sys::IsLittleEndianHost)
 	{
 		// FIXME: Disabled because of problems with BYTE
 		//if (auto constant = llvm::dyn_cast<llvm::ConstantInt>(_word))