//===-- TargetMachine.cpp - General Target Information ---------------------==//
//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
// This file describes the general parts of a Target machine.
-// This file also implements MachineCacheInfo.
//
//===----------------------------------------------------------------------===//
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/MachineCacheInfo.h"
-#include "llvm/Type.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/MC/MCAsmInfo.h"
+#include "llvm/MC/MCCodeGenInfo.h"
+#include "llvm/Support/CommandLine.h"
+using namespace llvm;
//---------------------------------------------------------------------------
-// class TargetMachine
-//
-// Purpose:
-// Machine description.
-//
+// Command-line options that tend to be useful on more than one back-end.
+//
+
+namespace llvm {
+ 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));
+
//---------------------------------------------------------------------------
+// TargetMachine Class
+//
+TargetMachine::TargetMachine(const Target &T,
+ 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),
+ Options(Options) {
+}
-// function TargetMachine::findOptimalStorageSize
-//
-// Purpose:
-// This default implementation assumes that all sub-word data items use
-// space equal to optSizeForSubWordData, and all other primitive data
-// items use space according to the type.
-//
-unsigned int
-TargetMachine::findOptimalStorageSize(const Type* ty) const
-{
- switch(ty->getPrimitiveID())
- {
- case Type::BoolTyID:
- case Type::UByteTyID:
- case Type::SByteTyID:
- case Type::UShortTyID:
- case Type::ShortTyID:
- return optSizeForSubWordData;
-
- default:
- return DataLayout.getTypeSize(ty);
- }
+TargetMachine::~TargetMachine() {
+ delete CodeGenInfo;
+ 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)
-//---------------------------------------------------------------------------
-// class MachineCacheInfo
-//
-// Purpose:
-// Describes properties of the target cache architecture.
-//---------------------------------------------------------------------------
+ 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");
+}
+
+/// getRelocationModel - Returns the code generation relocation model. The
+/// choices are static, PIC, and dynamic-no-pic, and target default.
+Reloc::Model TargetMachine::getRelocationModel() const {
+ if (!CodeGenInfo)
+ return Reloc::Default;
+ return CodeGenInfo->getRelocationModel();
+}
+
+/// getCodeModel - Returns the code model. The choices are small, kernel,
+/// medium, large, and target default.
+CodeModel::Model TargetMachine::getCodeModel() const {
+ if (!CodeGenInfo)
+ return CodeModel::Default;
+ 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 {
+ if (!CodeGenInfo)
+ return CodeGenOpt::Default;
+ return CodeGenInfo->getOptLevel();
+}
+
+bool TargetMachine::getAsmVerbosityDefault() {
+ return AsmVerbosityDefault;
+}
+
+void TargetMachine::setAsmVerbosityDefault(bool V) {
+ AsmVerbosityDefault = V;
+}
+
+bool TargetMachine::getFunctionSections() {
+ return FunctionSections;
+}
+
+bool TargetMachine::getDataSections() {
+ return DataSections;
+}
+
+void TargetMachine::setFunctionSections(bool V) {
+ FunctionSections = V;
+}
-void MachineCacheInfo::Initialize() {
- numLevels = 2;
- cacheLineSizes.push_back(16); cacheLineSizes.push_back(32);
- cacheSizes.push_back(1 << 15); cacheSizes.push_back(1 << 20);
- cacheAssoc.push_back(1); cacheAssoc.push_back(4);
+void TargetMachine::setDataSections(bool V) {
+ DataSections = V;
}
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