add some mroe comments, add a isImplicitDef() method, add 
isConditionalBranch() and isUnconditionalBranch() methods.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45688 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed