Make BufferOverlap analysis more flexible.
Make BufferOverlap analysis more flexible.

haylesr/angr,avain/angr,mingderwang/angr,lowks/angr,fjferrer/angr,cureHsu/angr,chubbymaggie/angr,axt/angr,haylesr/angr,GuardianRG/angr,iamahuman/angr,iamahuman/angr,schieb/angr,schieb/angr,tyb0807/angr,chubbymaggie/angr,zhuyue1314/angr,GuardianRG/angr,angr/angr,f-prettyland/angr,axt/angr,avain/angr,schieb/angr,lowks/angr,mingderwang/angr,f-prettyland/angr,angr/angr,terry2012/angr,zhuyue1314/angr,axt/angr,tyb0807/angr,iamahuman/angr,f-prettyland/angr,chubbymaggie/angr,xurantju/angr,terry2012/angr,tyb0807/angr,xurantju/angr,fjferrer/angr,angr/angr,cureHsu/angr