Endianness.cpp

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#include "Endianness.h"

#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"

namespace dev
{
namespace eth
{
namespace jit
{

llvm::Value* Endianness::bswapIfLE(IRBuilder& _builder, llvm::Value* _value)
{
        if (llvm::sys::IsLittleEndianHost)
        {
                if (auto constant = llvm::dyn_cast<llvm::ConstantInt>(_value))
                        return _builder.getInt(constant->getValue().byteSwap());

                // OPT: Cache func declaration?
                auto bswapFunc = llvm::Intrinsic::getDeclaration(_builder.GetInsertBlock()->getParent()->getParent(), llvm::Intrinsic::bswap, _value->getType());
                return _builder.CreateCall(bswapFunc, _value);
        }
        return _value;
}

}
}
}