X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetMachine.cpp;h=70088b1a4976b88482d145d3975986c0f4fecd7f;hb=27107f6ab4627fa38bcacad6757ed6d52910f880;hp=19819b886c11e38e794e4d1bfd3a430172dc1e34;hpb=c1b1c7b205589c9a081e1cbd33fb56506fc287b3;p=oota-llvm.git

diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp
index 19819b886c1..70088b1a497 100644
--- a/lib/Target/TargetMachine.cpp
+++ b/lib/Target/TargetMachine.cpp
@@ -11,9 +11,12 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/MC/MCAsmInfo.h"
 #include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
+#include "llvm/GlobalAlias.h"
+#include "llvm/GlobalValue.h"
+#include "llvm/GlobalVariable.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCCodeGenInfo.h"
 #include "llvm/Support/CommandLine.h"
 using namespace llvm;
 
@@ -22,8 +25,6 @@ using namespace llvm;
 //
 
 namespace llvm {
-  bool StrongPHIElim;
-  bool EnableMachineSched;
   bool HasDivModLibcall;
   bool AsmVerbosityDefault(false);
 }
@@ -76,6 +77,60 @@ CodeModel::Model TargetMachine::getCodeModel() const {
   return CodeGenInfo->getCodeModel();
 }
 
+/// Get the IR-specified TLS model for Var.
+static TLSModel::Model getSelectedTLSModel(const GlobalVariable *Var) {
+  switch (Var->getThreadLocalMode()) {
+  case GlobalVariable::NotThreadLocal:
+    llvm_unreachable("getSelectedTLSModel for non-TLS variable");
+    break;
+  case GlobalVariable::GeneralDynamicTLSModel:
+    return TLSModel::GeneralDynamic;
+  case GlobalVariable::LocalDynamicTLSModel:
+    return TLSModel::LocalDynamic;
+  case GlobalVariable::InitialExecTLSModel:
+    return TLSModel::InitialExec;
+  case GlobalVariable::LocalExecTLSModel:
+    return TLSModel::LocalExec;
+  }
+  llvm_unreachable("invalid TLS model");
+}
+
+TLSModel::Model TargetMachine::getTLSModel(const GlobalValue *GV) const {
+  // If GV is an alias then use the aliasee for determining
+  // thread-localness.
+  if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
+    GV = GA->resolveAliasedGlobal(false);
+  const GlobalVariable *Var = cast<GlobalVariable>(GV);
+
+  bool isLocal = Var->hasLocalLinkage();
+  bool isDeclaration = Var->isDeclaration();
+  bool isPIC = getRelocationModel() == Reloc::PIC_;
+  bool isPIE = Options.PositionIndependentExecutable;
+  // FIXME: what should we do for protected and internal visibility?
+  // For variables, is internal different from hidden?
+  bool isHidden = Var->hasHiddenVisibility();
+
+  TLSModel::Model Model;
+  if (isPIC && !isPIE) {
+    if (isLocal || isHidden)
+      Model = TLSModel::LocalDynamic;
+    else
+      Model = TLSModel::GeneralDynamic;
+  } else {
+    if (!isDeclaration || isHidden)
+      Model = TLSModel::LocalExec;
+    else
+      Model = TLSModel::InitialExec;
+  }
+
+  // If the user specified a more specific model, use that.
+  TLSModel::Model SelectedModel = getSelectedTLSModel(Var);
+  if (SelectedModel > Model)
+    return SelectedModel;
+
+  return Model;
+}
+
 /// getOptLevel - Returns the optimization level: None, Less,
 /// Default, or Aggressive.
 CodeGenOpt::Level TargetMachine::getOptLevel() const {
@@ -107,4 +162,3 @@ void TargetMachine::setFunctionSections(bool V) {
 void TargetMachine::setDataSections(bool V) {
   DataSections = V;
 }
-