Saturation arithmetic (sub and add) was added for int32/int64.
Saturation arithmetic mul and div for int8/int16/int32 and div for int64 was added
Dec constants was changed with hex constants.
adding cases of 'cast' instructions in optimizations
Merge pull request #746 from ifilippov/master

Adding cases of 'cast' instructions in optimizations
Merge pull request #741 from Vsevolod-Livinskij/master

Saturation arithmetic.
Revert "support of LLVM trunk after 201618 revision 'VirtualFileSystem'"

This reverts commit 7fcf4081895159a7e4b1378a23345aa421978b11.
Merge pull request #748 from ifilippov/master

Revert "support of LLVM trunk after 201618 revision 'VirtualFileSystem'"