Simplify native little-endian for MVA_UPSIZE, DOCINFO2ID_T, DOCINFOSETID

64-bit ints in LE order are by arch placed from low to hi bytes in the memory. This is no need to manually split a number to halves and perform manual placing

src/gtests_functions.cpp

@@ -1211,3 +1211,17 @@ TEST ( functions, valgrind_use )
	ASSERT_TRUE (true) << "intended leak";
}

TEST ( functions, int64_le )
{
	DWORD pMva[2] = {0x01020304, 0x05060708};

	// expression from MVA_UPSIZE
	auto iTest = ( int64_t ) ( ( uint64_t ) pMva[0] | ( ( ( uint64_t ) pMva[1] ) << 32 ) );
	auto iTest2 = MVA_UPSIZE ( pMva );
	ASSERT_EQ ( iTest, iTest2 );

#if USE_LITTLE_ENDIAN
	auto iTestLE = *( int64_t * ) pMva;
	ASSERT_EQ ( iTest, iTestLE ) << "little endian allows simplify";
#endif
}

src/sphinx.h

@@ -121,7 +121,7 @@ template<> inline DWORD DOCINFO2ID_T ( const DWORD * pDocinfo )
template<> inline uint64_t DOCINFO2ID_T ( const DWORD * pDocinfo )
{
#if USE_LITTLE_ENDIAN
	return uint64_t(pDocinfo[0]) + (uint64_t(pDocinfo[1])<<32);
	return *(uint64_t *) pDocinfo;
#else
	return uint64_t(pDocinfo[1]) + (uint64_t(pDocinfo[0])<<32);
#endif
@@ -135,8 +135,7 @@ inline void DOCINFOSETID ( DWORD * pDocinfo, DWORD uValue )
inline void DOCINFOSETID ( DWORD * pDocinfo, uint64_t uValue )
{
#if USE_LITTLE_ENDIAN
	pDocinfo[0] = (DWORD)uValue;
	pDocinfo[1] = (DWORD)(uValue>>32);
	*( uint64_t * ) pDocinfo = uValue;
#else
	pDocinfo[0] = (DWORD)(uValue>>32);
	pDocinfo[1] = (DWORD)uValue;

src/sphinxint.h

@@ -582,8 +582,12 @@ struct MemTracker_c : ISphNoncopyable

inline int64_t MVA_UPSIZE ( const DWORD * pMva )
{
#if USE_LITTLE_ENDIAN
	return *(int64_t*)pMva;
#else
	int64_t iMva = (int64_t)( (uint64_t)pMva[0] | ( ( (uint64_t)pMva[1] )<<32 ) );
	return iMva;
#endif
}