Import LLVM, at r72732.

1 files changed, 229 insertions, 0 deletions

diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp
new file mode 100644
index 0000000..1b042dd
--- /dev/null
+++ b/lib/Target/TargetMachine.cpp
@@ -0,0 +1,229 @@
+//===-- 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.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Support/CommandLine.h"
+using namespace llvm;
+
+//---------------------------------------------------------------------------
+// Command-line options that tend to be useful on more than one back-end.
+//
+
+namespace llvm {
+  bool LessPreciseFPMADOption;
+  bool PrintMachineCode;
+  bool NoFramePointerElim;
+  bool NoExcessFPPrecision;
+  bool UnsafeFPMath;
+  bool FiniteOnlyFPMathOption;
+  bool HonorSignDependentRoundingFPMathOption;
+  bool UseSoftFloat;
+  bool NoImplicitFloat;
+  bool NoZerosInBSS;
+  bool ExceptionHandling;
+  bool UnwindTablesMandatory;
+  Reloc::Model RelocationModel;
+  CodeModel::Model CMModel;
+  bool PerformTailCallOpt;
+  unsigned StackAlignment;
+  bool RealignStack;
+  bool DisableJumpTables;
+  bool StrongPHIElim;
+  bool DisableRedZone;
+  bool AsmVerbosityDefault(false);
+}
+
+static cl::opt<bool, true>
+PrintCode("print-machineinstrs",
+  cl::desc("Print generated machine code"),
+  cl::location(PrintMachineCode), cl::init(false));
+static cl::opt<bool, true>
+DisableFPElim("disable-fp-elim",
+  cl::desc("Disable frame pointer elimination optimization"),
+  cl::location(NoFramePointerElim),
+  cl::init(false));
+static cl::opt<bool, true>
+DisableExcessPrecision("disable-excess-fp-precision",
+  cl::desc("Disable optimizations that may increase FP precision"),
+  cl::location(NoExcessFPPrecision),
+  cl::init(false));
+static cl::opt<bool, true>
+EnableFPMAD("enable-fp-mad",
+  cl::desc("Enable less precise MAD instructions to be generated"),
+  cl::location(LessPreciseFPMADOption),
+  cl::init(false));
+static cl::opt<bool, true>
+EnableUnsafeFPMath("enable-unsafe-fp-math",
+  cl::desc("Enable optimizations that may decrease FP precision"),
+  cl::location(UnsafeFPMath),
+  cl::init(false));
+static 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));
+static cl::opt<bool, true>
+EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
+  cl::Hidden,
+  cl::desc("Force codegen to assume rounding mode can change dynamically"),
+  cl::location(HonorSignDependentRoundingFPMathOption),
+  cl::init(false));
+static cl::opt<bool, true>
+GenerateSoftFloatCalls("soft-float",
+  cl::desc("Generate software floating point library calls"),
+  cl::location(UseSoftFloat),
+  cl::init(false));
+static cl::opt<bool, true>
+GenerateNoImplicitFloats("no-implicit-float",
+  cl::desc("Don't generate implicit floating point instructions (x86-only)"),
+  cl::location(NoImplicitFloat),
+  cl::init(false));
+static 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));
+static cl::opt<bool, true>
+EnableExceptionHandling("enable-eh",
+  cl::desc("Emit DWARF exception handling (default if target supports)"),
+  cl::location(ExceptionHandling),
+  cl::init(false));
+static cl::opt<bool, true>
+EnableUnwindTables("unwind-tables",
+  cl::desc("Generate unwinding tables for all functions"),
+  cl::location(UnwindTablesMandatory),
+  cl::init(false));
+
+static 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));
+static 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));
+static cl::opt<bool, true>
+EnablePerformTailCallOpt("tailcallopt",
+  cl::desc("Turn on tail call optimization."),
+  cl::location(PerformTailCallOpt),
+  cl::init(false));
+static cl::opt<unsigned, true>
+OverrideStackAlignment("stack-alignment",
+  cl::desc("Override default stack alignment"),
+  cl::location(StackAlignment),
+  cl::init(0));
+static cl::opt<bool, true>
+EnableRealignStack("realign-stack",
+  cl::desc("Realign stack if needed"),
+  cl::location(RealignStack),
+  cl::init(true));
+static cl::opt<bool, true>
+DisableSwitchTables(cl::Hidden, "disable-jump-tables", 
+  cl::desc("Do not generate jump tables."),
+  cl::location(DisableJumpTables),
+  cl::init(false));
+static cl::opt<bool, true>
+EnableStrongPHIElim(cl::Hidden, "strong-phi-elim",
+  cl::desc("Use strong PHI elimination."),
+  cl::location(StrongPHIElim),
+  cl::init(false));
+static cl::opt<bool, true>
+DisableRedZoneOption("disable-red-zone",
+  cl::desc("Do not emit code that uses the red zone."),
+  cl::location(DisableRedZone),
+  cl::init(false));
+
+//---------------------------------------------------------------------------
+// TargetMachine Class
+//
+
+TargetMachine::~TargetMachine() {
+  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;
+}
+
+/// setRelocationModel - Sets the code generation relocation model.
+void TargetMachine::setRelocationModel(Reloc::Model Model) {
+  RelocationModel = Model;
+}
+
+/// getCodeModel - Returns the code model. The choices are small, kernel,
+/// medium, large, and target default.
+CodeModel::Model TargetMachine::getCodeModel() {
+  return CMModel;
+}
+
+/// setCodeModel - Sets the code model.
+void TargetMachine::setCodeModel(CodeModel::Model Model) {
+  CMModel = Model;
+}
+
+bool TargetMachine::getAsmVerbosityDefault() {
+  return AsmVerbosityDefault;
+}
+
+void TargetMachine::setAsmVerbosityDefault(bool V) {
+  AsmVerbosityDefault = V;
+}
+
+namespace llvm {
+  /// LessPreciseFPMAD - This flag return true when -enable-fp-mad option
+  /// is specified on the command line.  When this flag is off(default), the
+  /// code generator is not allowed to generate mad (multiply add) if the
+  /// result is "less precise" than doing those operations individually.
+  bool LessPreciseFPMAD() { return UnsafeFPMath || LessPreciseFPMADOption; }
+
+  /// 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;
+  }
+}
+