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53 Commits

Author SHA1 Message Date
Dan Gohman
8468d1a845 Track local physical register liveness. This is not the most 
efficient implementation possible, but it's pretty simple and
good enough for the time being.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56504 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-23 21:40:44 +00:00
Dan Gohman
e251b1529f Don't consider instructions with implicit physical register 
defs to be necessarily live.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56310 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-18 18:22:32 +00:00
Dan Gohman
d3ead4329e Add a new MachineInstr-level DCE pass. It is very simple, and is intended to 
be used with fast-isel.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56268 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-17 00:43:24 +00:00