From cbe34b4cc98148b386a0c96cd195e7f62f52a6e3 Mon Sep 17 00:00:00 2001 From: Hans Wennborg Date: Sat, 23 Jun 2012 11:37:03 +0000 Subject: Extend the IL for selecting TLS models (PR9788) This allows the user/front-end to specify a model that is better than what LLVM would choose by default. For example, a variable might be declared as @x = thread_local(initialexec) global i32 42 if it will not be used in a shared library that is dlopen'ed. If the specified model isn't supported by the target, or if LLVM can make a better choice, a different model may be used. llvm-svn: 159077 --- llvm/lib/VMCore/AsmWriter.cpp | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) (limited to 'llvm/lib/VMCore/AsmWriter.cpp') diff --git a/llvm/lib/VMCore/AsmWriter.cpp b/llvm/lib/VMCore/AsmWriter.cpp index 4a7fde19055..9147b635126 100644 --- a/llvm/lib/VMCore/AsmWriter.cpp +++ b/llvm/lib/VMCore/AsmWriter.cpp @@ -1376,6 +1376,26 @@ static void PrintVisibility(GlobalValue::VisibilityTypes Vis, } } +static void PrintThreadLocalModel(GlobalVariable::ThreadLocalMode TLM, + formatted_raw_ostream &Out) { + switch (TLM) { + case GlobalVariable::NotThreadLocal: + break; + case GlobalVariable::GeneralDynamicTLSModel: + Out << "thread_local "; + break; + case GlobalVariable::LocalDynamicTLSModel: + Out << "thread_local(localdynamic) "; + break; + case GlobalVariable::InitialExecTLSModel: + Out << "thread_local(initialexec) "; + break; + case GlobalVariable::LocalExecTLSModel: + Out << "thread_local(localexec) "; + break; + } +} + void AssemblyWriter::printGlobal(const GlobalVariable *GV) { if (GV->isMaterializable()) Out << "; Materializable\n"; @@ -1388,8 +1408,8 @@ void AssemblyWriter::printGlobal(const GlobalVariable *GV) { PrintLinkage(GV->getLinkage(), Out); PrintVisibility(GV->getVisibility(), Out); + PrintThreadLocalModel(GV->getThreadLocalMode(), Out); - if (GV->isThreadLocal()) Out << "thread_local "; if (unsigned AddressSpace = GV->getType()->getAddressSpace()) Out << "addrspace(" << AddressSpace << ") "; if (GV->hasUnnamedAddr()) Out << "unnamed_addr "; -- cgit v1.2.3