Shuxin Yang e4fb375995 Use address-taken to disambiguate global variable and indirect memops. ...

Major steps include:
 1). introduces a not-addr-taken bit-field in GlobalVariable
 2). GlobalOpt pass sets "not-address-taken" if it proves a global varirable 
    dosen't have its address taken.
 3). AA use this info for disambiguation. 

llvm-svn: 193251

2013-10-23 17:28:19 +00:00

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