Dan Gohman 2b0112a65a Give PassManager and FunctionPassManager a common base class, with
add(Pass *) as a pure virtual member function. This will allow all
the various addPassesTo* functions in LLVM to avoid hard-coding what
type of PassManager is used. 

llvm-svn: 48226
2008-03-11 16:41:42 +00:00
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