Jakob Stoklund Olesen c8e2bb68bb Store sub-class lists as a bit vector. ... This uses less memory and it reduces the complexity of sub-class operations: - hasSubClassEq() and friends become O(1) instead of O(N). - getCommonSubClass() becomes O(N) instead of O(N^2). In the future, TableGen will infer register classes. This makes it cheap to add them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140898 91177308-0d34-0410-b5e6-96231b3b80d8		2011-09-30 22:19:07 +00:00
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llvm	Store sub-class lists as a bit vector.	2011-09-30 22:19:07 +00:00
llvm-c