a4d51bfbc6
This gets rid of one allocation per bitmap. Often the bitmap_head is now on the stack, when it isn't its part of some other struct on the heap instead of being refered to by that struct. On 64 bit platforms this will increase the size of such structs by 24 bytes, but its an over all win since we don't need an 8 byte pointer pointing at the bitmap_head. Given that the auto_bitmap owns the bitmap_head anyway we know there would never be a place where two auto_bitmaps would refer to the same bitmap_head object. gcc/ChangeLog: 2017-05-13 Trevor Saunders <tbsaunde+gcc@tbsaunde.org> * bitmap.h (class auto_bitmap): Change type of m_bits to bitmap_head, and adjust ctor / dtor and member operators. From-SVN: r248017
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