Re: jc/lookup-object-hash from pu crashes on ARM

Jonathan Nieder [off-list ref] writes:

Even better could be to start aligning the hashes we pass around,
using something like this:

	union object_hash {
		unsigned char sha1[20];
		uint32_t chunk[5];
	};

which could speed up functions like hashcpy(), hashcmp(), and
hasheq().  But it's probably not worth the fuss.

The "flag" field in struct ref_list should be moved down to assure
alignment.

        struct ref_list {
                struct ref_list *next;
                unsigned char flag; /* ISSYMREF? ISPACKED? */
                unsigned char sha1[20];
                unsigned char peeled[20];
                char name[FLEX_ARRAY];
        };

I am very tempted to take that "union" approach (modulo that I would call
that an "object_name") in the longer run, though.