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Add -ftls-model command-line flag.

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This allows for setting the default TLS model. (PR9788)

llvm-svn: 159336
This commit is contained in:
Hans Wennborg
2012-06-28 08:01:44 +00:00
parent 608c0b65d7
commit f60f6af9e8
9 changed files with 132 additions and 29 deletions
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48
clang/lib/CodeGen/CodeGenModule.cpp
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@@ -258,6 +258,45 @@ void CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV,
GV->setVisibility(GetLLVMVisibility(LV.visibility()));
}
static llvm::GlobalVariable::ThreadLocalMode GetLLVMTLSModel(StringRef S) {
return llvm::StringSwitch<llvm::GlobalVariable::ThreadLocalMode>(S)
.Case("global-dynamic", llvm::GlobalVariable::GeneralDynamicTLSModel)
.Case("local-dynamic", llvm::GlobalVariable::LocalDynamicTLSModel)
.Case("initial-exec", llvm::GlobalVariable::InitialExecTLSModel)
.Case("local-exec", llvm::GlobalVariable::LocalExecTLSModel);
}
static llvm::GlobalVariable::ThreadLocalMode GetLLVMTLSModel(
CodeGenOptions::TLSModel M) {
switch (M) {
case CodeGenOptions::GeneralDynamicTLSModel:
return llvm::GlobalVariable::GeneralDynamicTLSModel;
case CodeGenOptions::LocalDynamicTLSModel:
return llvm::GlobalVariable::LocalDynamicTLSModel;
case CodeGenOptions::InitialExecTLSModel:
return llvm::GlobalVariable::InitialExecTLSModel;
case CodeGenOptions::LocalExecTLSModel:
return llvm::GlobalVariable::LocalExecTLSModel;
}
llvm_unreachable("Invalid TLS model!");
}
void CodeGenModule::setTLSMode(llvm::GlobalVariable *GV,
const VarDecl &D) const {
assert(D.isThreadSpecified() && "setting TLS mode on non-TLS var!");
llvm::GlobalVariable::ThreadLocalMode TLM;
TLM = GetLLVMTLSModel(CodeGenOpts.DefaultTLSModel);
// Override the TLS model if it is explicitly specified.
if (D.hasAttr<TLSModelAttr>()) {
const TLSModelAttr *Attr = D.getAttr<TLSModelAttr>();
TLM = GetLLVMTLSModel(Attr->getModel());
}
GV->setThreadLocalMode(TLM);
}
/// Set the symbol visibility of type information (vtable and RTTI)
/// associated with the given type.
void CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV,
@@ -1212,13 +1251,8 @@ CodeGenModule::GetOrCreateLLVMGlobal(StringRef MangledName,
GV->setVisibility(GetLLVMVisibility(LV.visibility()));
}
GV->setThreadLocal(D->isThreadSpecified());
// Set the TLS model if it it's explicitly specified.
if (D->hasAttr<TLSModelAttr>()) {
const TLSModelAttr *Attr = D->getAttr<TLSModelAttr>();
GV->setThreadLocalMode(GetLLVMTLSModel(Attr->getModel()));
}
if (D->isThreadSpecified())
setTLSMode(GV, *D);
}
if (AddrSpace != Ty->getAddressSpace())