Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp

@@ -0,0 +1,200 @@
+//===-- MipsMCTargetDesc.cpp - Mips Target Descriptions -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides Mips specific target descriptions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MipsMCTargetDesc.h"
+#include "InstPrinter/MipsInstPrinter.h"
+#include "MipsAsmBackend.h"
+#include "MipsELFStreamer.h"
+#include "MipsMCAsmInfo.h"
+#include "MipsMCNaCl.h"
+#include "MipsTargetStreamer.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/MC/MCCodeEmitter.h"
+#include "llvm/MC/MCELFStreamer.h"
+#include "llvm/MC/MCInstrAnalysis.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MachineLocation.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/TargetRegistry.h"
+
+using namespace llvm;
+
+#define GET_INSTRINFO_MC_DESC
+#include "MipsGenInstrInfo.inc"
+
+#define GET_SUBTARGETINFO_MC_DESC
+#include "MipsGenSubtargetInfo.inc"
+
+#define GET_REGINFO_MC_DESC
+#include "MipsGenRegisterInfo.inc"
+
+/// Select the Mips CPU for the given triple and cpu name.
+/// FIXME: Merge with the copy in MipsSubtarget.cpp
+StringRef MIPS_MC::selectMipsCPU(const Triple &TT, StringRef CPU) {
+  if (CPU.empty() || CPU == "generic") {
+    if (TT.getArch() == Triple::mips || TT.getArch() == Triple::mipsel)
+      CPU = "mips32";
+    else
+      CPU = "mips64";
+  }
+  return CPU;
+}
+
+static MCInstrInfo *createMipsMCInstrInfo() {
+  MCInstrInfo *X = new MCInstrInfo();
+  InitMipsMCInstrInfo(X);
+  return X;
+}
+
+static MCRegisterInfo *createMipsMCRegisterInfo(const Triple &TT) {
+  MCRegisterInfo *X = new MCRegisterInfo();
+  InitMipsMCRegisterInfo(X, Mips::RA);
+  return X;
+}
+
+static MCSubtargetInfo *createMipsMCSubtargetInfo(const Triple &TT,
+                                                  StringRef CPU, StringRef FS) {
+  CPU = MIPS_MC::selectMipsCPU(TT, CPU);
+  return createMipsMCSubtargetInfoImpl(TT, CPU, FS);
+}
+
+static MCAsmInfo *createMipsMCAsmInfo(const MCRegisterInfo &MRI,
+                                      const Triple &TT) {
+  MCAsmInfo *MAI = new MipsMCAsmInfo(TT);
+
+  unsigned SP = MRI.getDwarfRegNum(Mips::SP, true);
+  MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(nullptr, SP, 0);
+  MAI->addInitialFrameState(Inst);
+
+  return MAI;
+}
+
+static MCInstPrinter *createMipsMCInstPrinter(const Triple &T,
+                                              unsigned SyntaxVariant,
+                                              const MCAsmInfo &MAI,
+                                              const MCInstrInfo &MII,
+                                              const MCRegisterInfo &MRI) {
+  return new MipsInstPrinter(MAI, MII, MRI);
+}
+
+static MCStreamer *createMCStreamer(const Triple &T, MCContext &Context,
+                                    std::unique_ptr<MCAsmBackend> &&MAB,
+                                    raw_pwrite_stream &OS,
+                                    std::unique_ptr<MCCodeEmitter> &&Emitter,
+                                    bool RelaxAll) {
+  MCStreamer *S;
+  if (!T.isOSNaCl())
+    S = createMipsELFStreamer(Context, std::move(MAB), OS, std::move(Emitter),
+                              RelaxAll);
+  else
+    S = createMipsNaClELFStreamer(Context, std::move(MAB), OS,
+                                  std::move(Emitter), RelaxAll);
+  return S;
+}
+
+static MCTargetStreamer *createMipsAsmTargetStreamer(MCStreamer &S,
+                                                     formatted_raw_ostream &OS,
+                                                     MCInstPrinter *InstPrint,
+                                                     bool isVerboseAsm) {
+  return new MipsTargetAsmStreamer(S, OS);
+}
+
+static MCTargetStreamer *createMipsNullTargetStreamer(MCStreamer &S) {
+  return new MipsTargetStreamer(S);
+}
+
+static MCTargetStreamer *
+createMipsObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) {
+  return new MipsTargetELFStreamer(S, STI);
+}
+
+namespace {
+
+class MipsMCInstrAnalysis : public MCInstrAnalysis {
+public:
+  MipsMCInstrAnalysis(const MCInstrInfo *Info) : MCInstrAnalysis(Info) {}
+
+  bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
+                      uint64_t &Target) const override {
+    unsigned NumOps = Inst.getNumOperands();
+    if (NumOps == 0)
+      return false;
+    switch (Info->get(Inst.getOpcode()).OpInfo[NumOps - 1].OperandType) {
+    case MCOI::OPERAND_UNKNOWN:
+    case MCOI::OPERAND_IMMEDIATE:
+      // jal, bal ...
+      Target = Inst.getOperand(NumOps - 1).getImm();
+      return true;
+    case MCOI::OPERAND_PCREL:
+      // b, j, beq ...
+      Target = Addr + Inst.getOperand(NumOps - 1).getImm();
+      return true;
+    default:
+      return false;
+    }
+  }
+};
+}
+
+static MCInstrAnalysis *createMipsMCInstrAnalysis(const MCInstrInfo *Info) {
+  return new MipsMCInstrAnalysis(Info);
+}
+
+extern "C" void LLVMInitializeMipsTargetMC() {
+  for (Target *T : {&getTheMipsTarget(), &getTheMipselTarget(),
+                    &getTheMips64Target(), &getTheMips64elTarget()}) {
+    // Register the MC asm info.
+    RegisterMCAsmInfoFn X(*T, createMipsMCAsmInfo);
+
+    // Register the MC instruction info.
+    TargetRegistry::RegisterMCInstrInfo(*T, createMipsMCInstrInfo);
+
+    // Register the MC register info.
+    TargetRegistry::RegisterMCRegInfo(*T, createMipsMCRegisterInfo);
+
+    // Register the elf streamer.
+    TargetRegistry::RegisterELFStreamer(*T, createMCStreamer);
+
+    // Register the asm target streamer.
+    TargetRegistry::RegisterAsmTargetStreamer(*T, createMipsAsmTargetStreamer);
+
+    TargetRegistry::RegisterNullTargetStreamer(*T,
+                                               createMipsNullTargetStreamer);
+
+    // Register the MC subtarget info.
+    TargetRegistry::RegisterMCSubtargetInfo(*T, createMipsMCSubtargetInfo);
+
+    // Register the MC instruction analyzer.
+    TargetRegistry::RegisterMCInstrAnalysis(*T, createMipsMCInstrAnalysis);
+
+    // Register the MCInstPrinter.
+    TargetRegistry::RegisterMCInstPrinter(*T, createMipsMCInstPrinter);
+
+    TargetRegistry::RegisterObjectTargetStreamer(
+        *T, createMipsObjectTargetStreamer);
+
+    // Register the asm backend.
+    TargetRegistry::RegisterMCAsmBackend(*T, createMipsAsmBackend);
+  }
+
+  // Register the MC Code Emitter
+  for (Target *T : {&getTheMipsTarget(), &getTheMips64Target()})
+    TargetRegistry::RegisterMCCodeEmitter(*T, createMipsMCCodeEmitterEB);
+
+  for (Target *T : {&getTheMipselTarget(), &getTheMips64elTarget()})
+    TargetRegistry::RegisterMCCodeEmitter(*T, createMipsMCCodeEmitterEL);
+}