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3 Commits

Author SHA1 Message Date
Dan Gohman
a9d71e1319 Enhance LiveValues to work on PHI operands. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67523 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 15:49:37 +00:00
Dan Gohman
654c98c4f3 The last use in a block that doesn't have successors 
(return or unreachable) is a kill.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67357 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-20 01:28:21 +00:00
Dan Gohman
3751f564e3 Add a liveness analysis pass for LLVM IR values. This computes 
the set of blocks in which values are used, the set in which
values are live-through, and the set in which values are
killed. For the live-through and killed sets, conservative
approximations are used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67309 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-19 17:29:04 +00:00