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102 Commits

Author SHA1 Message Date
Dan Gohman
f3d647e00b Don't consider instructions with implicit physical register 
defs to be necessarily live.

llvm-svn: 56310
 2008-09-18 18:22:32 +00:00
Dan Gohman
c24cd015a7 Add a new MachineInstr-level DCE pass. It is very simple, and is intended to 
be used with fast-isel.

llvm-svn: 56268
 2008-09-17 00:43:24 +00:00