//
//===----------------------------------------------------------------------===//
-#include "llvm/Target/TargetAsmInfo.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/MC/MCAsmInfo.h"
+#include "llvm/MC/MCCodeGenInfo.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
//
namespace llvm {
- bool PrintMachineCode;
- bool NoFramePointerElim;
- bool NoExcessFPPrecision;
- bool UnsafeFPMath;
- bool FiniteOnlyFPMathOption;
- bool HonorSignDependentRoundingFPMathOption;
- bool UseSoftFloat;
- bool NoZerosInBSS;
- bool ExceptionHandling;
- bool UnwindTablesMandatory;
- Reloc::Model RelocationModel;
- CodeModel::Model CMModel;
- bool PerformTailCallOpt;
- bool OptimizeForSize;
- bool RealignStack;
- unsigned StackAlignment;
-}
-namespace {
- cl::opt<bool, true> PrintCode("print-machineinstrs",
- cl::desc("Print generated machine code"),
- cl::location(PrintMachineCode), cl::init(false));
-
- cl::opt<bool, true>
- DisableFPElim("disable-fp-elim",
- cl::desc("Disable frame pointer elimination optimization"),
- cl::location(NoFramePointerElim),
- cl::init(false));
- cl::opt<bool, true>
- DisableExcessPrecision("disable-excess-fp-precision",
- cl::desc("Disable optimizations that may increase FP precision"),
- cl::location(NoExcessFPPrecision),
- cl::init(false));
- cl::opt<bool, true>
- EnableUnsafeFPMath("enable-unsafe-fp-math",
- cl::desc("Enable optimizations that may decrease FP precision"),
- cl::location(UnsafeFPMath),
- cl::init(false));
- cl::opt<bool, true>
- EnableFiniteOnlyFPMath("enable-finite-only-fp-math",
- cl::desc("Enable optimizations that assumes non- NaNs / +-Infs"),
- cl::location(FiniteOnlyFPMathOption),
- cl::init(false));
- cl::opt<bool, true>
- EnableHonorSignDependentRoundingFPMath(cl::Hidden,
- "enable-sign-dependent-rounding-fp-math",
- cl::desc("Force codegen to assume rounding mode can change dynamically"),
- cl::location(HonorSignDependentRoundingFPMathOption),
- cl::init(false));
-
- cl::opt<bool, true>
- GenerateSoftFloatCalls("soft-float",
- cl::desc("Generate software floating point library calls"),
- cl::location(UseSoftFloat),
- cl::init(false));
- cl::opt<bool, true>
- DontPlaceZerosInBSS("nozero-initialized-in-bss",
- cl::desc("Don't place zero-initialized symbols into bss section"),
- cl::location(NoZerosInBSS),
- cl::init(false));
- cl::opt<bool, true>
- EnableExceptionHandling("enable-eh",
- cl::desc("Emit DWARF exception handling (default if target supports)"),
- cl::location(ExceptionHandling),
- cl::init(false));
- cl::opt<bool, true>
- EnableUnwindTables("unwind-tables",
- cl::desc("Generate unwinding tables for all functions"),
- cl::location(UnwindTablesMandatory),
- cl::init(false));
-
- cl::opt<llvm::Reloc::Model, true>
- DefRelocationModel(
- "relocation-model",
- cl::desc("Choose relocation model"),
- cl::location(RelocationModel),
- cl::init(Reloc::Default),
- cl::values(
- clEnumValN(Reloc::Default, "default",
- " Target default relocation model"),
- clEnumValN(Reloc::Static, "static",
- " Non-relocatable code"),
- clEnumValN(Reloc::PIC_, "pic",
- " Fully relocatable, position independent code"),
- clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
- " Relocatable external references, non-relocatable code"),
- clEnumValEnd));
- cl::opt<llvm::CodeModel::Model, true>
- DefCodeModel(
- "code-model",
- cl::desc("Choose code model"),
- cl::location(CMModel),
- cl::init(CodeModel::Default),
- cl::values(
- clEnumValN(CodeModel::Default, "default",
- " Target default code model"),
- clEnumValN(CodeModel::Small, "small",
- " Small code model"),
- clEnumValN(CodeModel::Kernel, "kernel",
- " Kernel code model"),
- clEnumValN(CodeModel::Medium, "medium",
- " Medium code model"),
- clEnumValN(CodeModel::Large, "large",
- " Large code model"),
- clEnumValEnd));
-
- cl::opt<bool, true>
- EnablePerformTailCallOpt("tailcallopt",
- cl::desc("Turn on tail call optimization."),
- cl::location(PerformTailCallOpt),
- cl::init(false));
- cl::opt<bool, true>
- EnableOptimizeForSize("optimize-size",
- cl::desc("Optimize for size."),
- cl::location(OptimizeForSize),
- cl::init(false));
-
- cl::opt<bool, true>
- EnableRealignStack("realign-stack",
- cl::desc("Realign stack if needed"),
- cl::location(RealignStack),
- cl::init(true));
-
- cl::opt<unsigned, true>
- OverrideStackAlignment("stack-alignment",
- cl::desc("Override default stack alignment"),
- cl::location(StackAlignment),
- cl::init(0));
+ 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) {
+}
+
TargetMachine::~TargetMachine() {
+ delete CodeGenInfo;
delete AsmInfo;
}
-/// getRelocationModel - Returns the code generation relocation model. The
-/// choices are static, PIC, and dynamic-no-pic, and target default.
-Reloc::Model TargetMachine::getRelocationModel() {
- return RelocationModel;
+/// \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");
}
-/// setRelocationModel - Sets the code generation relocation model.
-void TargetMachine::setRelocationModel(Reloc::Model Model) {
- RelocationModel = Model;
+/// 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() {
- return CMModel;
+CodeModel::Model TargetMachine::getCodeModel() const {
+ if (!CodeGenInfo)
+ return CodeModel::Default;
+ return CodeGenInfo->getCodeModel();
}
-/// setCodeModel - Sets the code model.
-void TargetMachine::setCodeModel(CodeModel::Model Model) {
- CMModel = Model;
+/// 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");
}
-namespace llvm {
- /// FiniteOnlyFPMath - This returns true when the -enable-finite-only-fp-math
- /// option is specified on the command line. If this returns false (default),
- /// the code generator is not allowed to assume that FP arithmetic arguments
- /// and results are never NaNs or +-Infs.
- bool FiniteOnlyFPMath() { return UnsafeFPMath || FiniteOnlyFPMathOption; }
-
- /// HonorSignDependentRoundingFPMath - Return true if the codegen must assume
- /// that the rounding mode of the FPU can change from its default.
- bool HonorSignDependentRoundingFPMath() {
- return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption;
+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();
}
+void TargetMachine::setOptLevel(CodeGenOpt::Level Level) const {
+ if (CodeGenInfo)
+ CodeGenInfo->setOptLevel(Level);
+}
+
+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 TargetMachine::setDataSections(bool V) {
+ DataSections = V;
+}
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