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

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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. 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193251 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Shuxin Yang
2013-10-23 17:28:19 +00:00
parent f39fe46062
commit 8e3851a6eb
18 changed files with 72 additions and 11 deletions
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4
lib/AsmParser/LLParser.cpp
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@ -704,7 +704,7 @@ bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc,
unsigned Linkage, bool HasLinkage,
unsigned Visibility) {
unsigned AddrSpace;
bool IsConstant, UnnamedAddr, IsExternallyInitialized;
bool IsConstant, UnnamedAddr, IsExternallyInitialized, notAddrTaken;
GlobalVariable::ThreadLocalMode TLM;
LocTy UnnamedAddrLoc;
LocTy IsExternallyInitializedLoc;
@ -719,6 +719,7 @@ bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc,
IsExternallyInitialized,
&IsExternallyInitializedLoc) ||
ParseGlobalType(IsConstant) ||
ParseOptionalToken(lltok::kw_notaddrtaken, notAddrTaken) ||
ParseType(Ty, TyLoc))
return true;
@ -776,6 +777,7 @@ bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc,
GV->setLinkage((GlobalValue::LinkageTypes)Linkage);
GV->setVisibility((GlobalValue::VisibilityTypes)Visibility);
GV->setExternallyInitialized(IsExternallyInitialized);
GV->setAddressMaybeTaken(!notAddrTaken);
GV->setThreadLocalMode(TLM);
GV->setUnnamedAddr(UnnamedAddr);