//
//===----------------------------------------------------------------------===//
-#include "llvm/MC/MCAsmInfo.h"
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/GlobalAlias.h"
+#include "llvm/IR/GlobalValue.h"
+#include "llvm/IR/GlobalVariable.h"
+#include "llvm/IR/Mangler.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCCodeGenInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCTargetOptions.h"
+#include "llvm/MC/SectionKind.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Target/TargetLowering.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
using namespace llvm;
-//---------------------------------------------------------------------------
-// Command-line options that tend to be useful on more than one back-end.
-//
-
-namespace llvm {
- bool StrongPHIElim;
- bool EnableMachineSched;
- bool HasDivModLibcall;
- bool AsmVerbosityDefault(false);
-}
-
-static cl::opt<bool>
-DataSections("fdata-sections",
- cl::desc("Emit data into separate sections"),
- cl::init(false));
-static cl::opt<bool>
-FunctionSections("ffunction-sections",
- cl::desc("Emit functions into separate sections"),
- cl::init(false));
-
-/// EnableMachineSched - temporary flag to enable the machine scheduling pass
-/// until we complete the register allocation pass configuration cleanup.
-static cl::opt<bool, true>
-MachineSchedOpt("enable-misched",
- cl::desc("Enable the machine instruction scheduling pass."),
- cl::location(EnableMachineSched),
- cl::init(false), cl::Hidden);
-
//---------------------------------------------------------------------------
// TargetMachine Class
//
StringRef TT, StringRef CPU, StringRef FS,
const TargetOptions &Options)
: TheTarget(T), TargetTriple(TT), TargetCPU(CPU), TargetFS(FS),
- CodeGenInfo(0), AsmInfo(0),
- MCRelaxAll(false),
- MCNoExecStack(false),
- MCSaveTempLabels(false),
- MCUseLoc(true),
- MCUseCFI(true),
- MCUseDwarfDirectory(false),
+ CodeGenInfo(nullptr), AsmInfo(nullptr),
+ RequireStructuredCFG(false),
Options(Options) {
}
delete AsmInfo;
}
+/// \brief Reset the target options based on the function's attributes.
+void TargetMachine::resetTargetOptions(const MachineFunction *MF) const {
+ const Function *F = MF->getFunction();
+ TargetOptions &TO = MF->getTarget().Options;
+
+#define RESET_OPTION(X, Y) \
+ do { \
+ if (F->hasFnAttribute(Y)) \
+ TO.X = \
+ (F->getAttributes(). \
+ getAttribute(AttributeSet::FunctionIndex, \
+ Y).getValueAsString() == "true"); \
+ } while (0)
+
+ RESET_OPTION(NoFramePointerElim, "no-frame-pointer-elim");
+ RESET_OPTION(LessPreciseFPMADOption, "less-precise-fpmad");
+ RESET_OPTION(UnsafeFPMath, "unsafe-fp-math");
+ RESET_OPTION(NoInfsFPMath, "no-infs-fp-math");
+ RESET_OPTION(NoNaNsFPMath, "no-nans-fp-math");
+ RESET_OPTION(UseSoftFloat, "use-soft-float");
+ RESET_OPTION(DisableTailCalls, "disable-tail-calls");
+
+ TO.MCOptions.SanitizeAddress = F->hasFnAttribute(Attribute::SanitizeAddress);
+}
+
/// getRelocationModel - Returns the code generation relocation model. The
/// choices are static, PIC, and dynamic-no-pic, and target default.
Reloc::Model TargetMachine::getRelocationModel() const {
return CodeGenInfo->getCodeModel();
}
+/// Get the IR-specified TLS model for Var.
+static TLSModel::Model getSelectedTLSModel(const GlobalValue *GV) {
+ switch (GV->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 {
+ bool isLocal = GV->hasLocalLinkage();
+ bool isDeclaration = GV->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 = GV->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(GV);
+ if (SelectedModel > Model)
+ return SelectedModel;
+
+ return Model;
+}
+
/// getOptLevel - Returns the optimization level: None, Less,
/// Default, or Aggressive.
CodeGenOpt::Level TargetMachine::getOptLevel() const {
return CodeGenInfo->getOptLevel();
}
-bool TargetMachine::getAsmVerbosityDefault() {
- return AsmVerbosityDefault;
+void TargetMachine::setOptLevel(CodeGenOpt::Level Level) const {
+ if (CodeGenInfo)
+ CodeGenInfo->setOptLevel(Level);
+}
+
+bool TargetMachine::getAsmVerbosityDefault() const {
+ return Options.MCOptions.AsmVerbose;
}
void TargetMachine::setAsmVerbosityDefault(bool V) {
- AsmVerbosityDefault = V;
+ Options.MCOptions.AsmVerbose = V;
}
-bool TargetMachine::getFunctionSections() {
- return FunctionSections;
+bool TargetMachine::getFunctionSections() const {
+ return Options.FunctionSections;
}
-bool TargetMachine::getDataSections() {
- return DataSections;
+bool TargetMachine::getDataSections() const {
+ return Options.DataSections;
}
void TargetMachine::setFunctionSections(bool V) {
- FunctionSections = V;
+ Options.FunctionSections = V;
}
void TargetMachine::setDataSections(bool V) {
- DataSections = V;
+ Options.DataSections = V;
+}
+
+void TargetMachine::getNameWithPrefix(SmallVectorImpl<char> &Name,
+ const GlobalValue *GV, Mangler &Mang,
+ bool MayAlwaysUsePrivate) const {
+ if (MayAlwaysUsePrivate || !GV->hasPrivateLinkage()) {
+ // Simple case: If GV is not private, it is not important to find out if
+ // private labels are legal in this case or not.
+ Mang.getNameWithPrefix(Name, GV, false);
+ return;
+ }
+ SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, *this);
+ const TargetLoweringObjectFile &TLOF =
+ getTargetLowering()->getObjFileLowering();
+ const MCSection *TheSection = TLOF.SectionForGlobal(GV, GVKind, Mang, *this);
+ bool CannotUsePrivateLabel = TLOF.isSectionAtomizableBySymbols(*TheSection);
+ Mang.getNameWithPrefix(Name, GV, CannotUsePrivateLabel);
}
+MCSymbol *TargetMachine::getSymbol(const GlobalValue *GV, Mangler &Mang) const {
+ SmallString<60> NameStr;
+ getNameWithPrefix(NameStr, GV, Mang);
+ const TargetLoweringObjectFile &TLOF =
+ getTargetLowering()->getObjFileLowering();
+ return TLOF.getContext().GetOrCreateSymbol(NameStr.str());
+}
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