//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "mips-subtarget"
-
#include "MipsMachineFunction.h"
-#include "MipsSubtarget.h"
-#include "MipsTargetMachine.h"
#include "Mips.h"
#include "MipsRegisterInfo.h"
+#include "MipsSubtarget.h"
+#include "MipsTargetMachine.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/Function.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+#define DEBUG_TYPE "mips-subtarget"
+
#define GET_SUBTARGETINFO_TARGET_DESC
#define GET_SUBTARGETINFO_CTOR
#include "MipsGenSubtargetInfo.inc"
-
-using namespace llvm;
-
// FIXME: Maybe this should be on by default when Mips16 is specified
//
static cl::opt<bool> Mixed16_32(
cl::desc("MIPS: mips16 hard float enable."),
cl::init(false));
+static cl::opt<bool>
+Mips16ConstantIslands(
+ "mips16-constant-islands", cl::NotHidden,
+ cl::desc("MIPS: mips16 constant islands enable."),
+ cl::init(true));
+
+/// Select the Mips CPU for the given triple and cpu name.
+/// FIXME: Merge with the copy in MipsMCTargetDesc.cpp
+static StringRef selectMipsCPU(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;
+}
+
void MipsSubtarget::anchor() { }
+static std::string computeDataLayout(const MipsSubtarget &ST) {
+ std::string Ret = "";
+
+ // There are both little and big endian mips.
+ if (ST.isLittle())
+ Ret += "e";
+ else
+ Ret += "E";
+
+ Ret += "-m:m";
+
+ // Pointers are 32 bit on some ABIs.
+ if (!ST.isABI_N64())
+ Ret += "-p:32:32";
+
+ // 8 and 16 bit integers only need no have natural alignment, but try to
+ // align them to 32 bits. 64 bit integers have natural alignment.
+ Ret += "-i8:8:32-i16:16:32-i64:64";
+
+ // 32 bit registers are always available and the stack is at least 64 bit
+ // aligned. On N64 64 bit registers are also available and the stack is
+ // 128 bit aligned.
+ if (ST.isABI_N64() || ST.isABI_N32())
+ Ret += "-n32:64-S128";
+ else
+ Ret += "-n32-S64";
+
+ return Ret;
+}
+
MipsSubtarget::MipsSubtarget(const std::string &TT, const std::string &CPU,
const std::string &FS, bool little,
- Reloc::Model _RM, MipsTargetMachine *_TM) :
- MipsGenSubtargetInfo(TT, CPU, FS),
- MipsArchVersion(Mips32), MipsABI(UnknownABI), IsLittle(little),
- IsSingleFloat(false), IsFP64bit(false), IsGP64bit(false), HasVFPU(false),
- IsLinux(true), HasSEInReg(false), HasCondMov(false), HasSwap(false),
- HasBitCount(false), HasFPIdx(false),
- InMips16Mode(false), InMips16HardFloat(Mips16HardFloat),
- InMicroMipsMode(false), HasDSP(false), HasDSPR2(false),
- AllowMixed16_32(Mixed16_32 | Mips_Os16), Os16(Mips_Os16), HasMSA(false),
- RM(_RM), OverrideMode(NoOverride), TM(_TM)
-{
- std::string CPUName = CPU;
- if (CPUName.empty())
- CPUName = "mips32";
-
- // Parse features string.
- ParseSubtargetFeatures(CPUName, FS);
+ MipsTargetMachine *_TM)
+ : MipsGenSubtargetInfo(TT, CPU, FS), MipsArchVersion(Mips32),
+ MipsABI(UnknownABI), IsLittle(little), IsSingleFloat(false),
+ IsFPXX(false), IsFP64bit(false), UseOddSPReg(true), IsNaN2008bit(false),
+ IsGP64bit(false), HasVFPU(false), HasCnMips(false), IsLinux(true),
+ HasMips3_32(false), HasMips3_32r2(false), HasMips4_32(false),
+ HasMips4_32r2(false), HasMips5_32r2(false), InMips16Mode(false),
+ InMips16HardFloat(Mips16HardFloat), InMicroMipsMode(false), HasDSP(false),
+ HasDSPR2(false), AllowMixed16_32(Mixed16_32 | Mips_Os16), Os16(Mips_Os16),
+ HasMSA(false), OverrideMode(NoOverride), TM(_TM), TargetTriple(TT),
+ DL(computeDataLayout(initializeSubtargetDependencies(CPU, FS, TM))),
+ TSInfo(DL), JITInfo(), InstrInfo(MipsInstrInfo::create(*this)),
+ FrameLowering(MipsFrameLowering::create(*TM, *this)),
+ TLInfo(MipsTargetLowering::create(*TM, *this)) {
PreviousInMips16Mode = InMips16Mode;
- // Initialize scheduling itinerary for the specified CPU.
- InstrItins = getInstrItineraryForCPU(CPUName);
+ // Don't even attempt to generate code for MIPS-I, MIPS-II, MIPS-III, and
+ // MIPS-V. They have not been tested and currently exist for the integrated
+ // assembler only.
+ if (MipsArchVersion == Mips1)
+ report_fatal_error("Code generation for MIPS-I is not implemented", false);
+ if (MipsArchVersion == Mips2)
+ report_fatal_error("Code generation for MIPS-II is not implemented", false);
+ if (MipsArchVersion == Mips3)
+ report_fatal_error("Code generation for MIPS-III is not implemented",
+ false);
+ if (MipsArchVersion == Mips5)
+ report_fatal_error("Code generation for MIPS-V is not implemented", false);
- // Set MipsABI if it hasn't been set yet.
- if (MipsABI == UnknownABI)
- MipsABI = hasMips64() ? N64 : O32;
+ // Assert exactly one ABI was chosen.
+ assert(MipsABI != UnknownABI);
+ assert((((getFeatureBits() & Mips::FeatureO32) != 0) +
+ ((getFeatureBits() & Mips::FeatureEABI) != 0) +
+ ((getFeatureBits() & Mips::FeatureN32) != 0) +
+ ((getFeatureBits() & Mips::FeatureN64) != 0)) == 1);
// Check if Architecture and ABI are compatible.
- assert(((!hasMips64() && (isABI_O32() || isABI_EABI())) ||
- (hasMips64() && (isABI_N32() || isABI_N64()))) &&
+ assert(((!isGP64bit() && (isABI_O32() || isABI_EABI())) ||
+ (isGP64bit() && (isABI_N32() || isABI_N64()))) &&
"Invalid Arch & ABI pair.");
if (hasMSA() && !isFP64bit())
"See -mattr=+fp64.",
false);
+ if (!isABI_O32() && !useOddSPReg())
+ report_fatal_error("-mattr=+nooddspreg requires the O32 ABI.", false);
+
+ if (IsFPXX && (isABI_N32() || isABI_N64()))
+ report_fatal_error("FPXX is not permitted for the N32/N64 ABI's.", false);
+
+ if (hasMips32r6()) {
+ StringRef ISA = hasMips64r6() ? "MIPS64r6" : "MIPS32r6";
+
+ assert(isFP64bit());
+ assert(isNaN2008());
+ if (hasDSP())
+ report_fatal_error(ISA + " is not compatible with the DSP ASE", false);
+ }
+
// Is the target system Linux ?
if (TT.find("linux") == std::string::npos)
IsLinux = false;
// Set UseSmallSection.
- UseSmallSection = !IsLinux && (RM == Reloc::Static);
- // set some subtarget specific features
- if (inMips16Mode())
- HasBitCount=false;
+ // TODO: Investigate the IsLinux check. I suspect it's really checking for
+ // bare-metal.
+ UseSmallSection = !IsLinux && (TM->getRelocationModel() == Reloc::Static);
}
-bool
-MipsSubtarget::enablePostRAScheduler(CodeGenOpt::Level OptLevel,
- TargetSubtargetInfo::AntiDepBreakMode &Mode,
- RegClassVector &CriticalPathRCs) const {
- Mode = TargetSubtargetInfo::ANTIDEP_NONE;
+/// This overrides the PostRAScheduler bit in the SchedModel for any CPU.
+bool MipsSubtarget::enablePostMachineScheduler() const { return true; }
+
+void MipsSubtarget::getCriticalPathRCs(RegClassVector &CriticalPathRCs) const {
CriticalPathRCs.clear();
- CriticalPathRCs.push_back(hasMips64() ?
+ CriticalPathRCs.push_back(isGP64bit() ?
&Mips::GPR64RegClass : &Mips::GPR32RegClass);
- return OptLevel >= CodeGenOpt::Aggressive;
+}
+
+CodeGenOpt::Level MipsSubtarget::getOptLevelToEnablePostRAScheduler() const {
+ return CodeGenOpt::Aggressive;
+}
+
+MipsSubtarget &
+MipsSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS,
+ const TargetMachine *TM) {
+ std::string CPUName = selectMipsCPU(TargetTriple, CPU);
+
+ // Parse features string.
+ ParseSubtargetFeatures(CPUName, FS);
+ // Initialize scheduling itinerary for the specified CPU.
+ InstrItins = getInstrItineraryForCPU(CPUName);
+
+ if (InMips16Mode && !TM->Options.UseSoftFloat)
+ InMips16HardFloat = true;
+
+ return *this;
}
//FIXME: This logic for reseting the subtarget along with
return;
OverrideMode = Mips16Override;
PreviousInMips16Mode = true;
- TM->setHelperClassesMips16();
+ setHelperClassesMips16();
return;
} else if (ChangeToNoMips16) {
if (!PreviousInMips16Mode)
return;
OverrideMode = NoMips16Override;
PreviousInMips16Mode = false;
- TM->setHelperClassesMipsSE();
+ setHelperClassesMipsSE();
return;
} else {
if (OverrideMode == NoOverride)
OverrideMode = NoOverride;
DEBUG(dbgs() << "back to default" << "\n");
if (inMips16Mode() && !PreviousInMips16Mode) {
- TM->setHelperClassesMips16();
+ setHelperClassesMips16();
PreviousInMips16Mode = true;
} else if (!inMips16Mode() && PreviousInMips16Mode) {
- TM->setHelperClassesMipsSE();
+ setHelperClassesMipsSE();
PreviousInMips16Mode = false;
}
return;
}
}
-bool MipsSubtarget::mipsSEUsesSoftFloat() const {
+void MipsSubtarget::setHelperClassesMips16() {
+ InstrInfoSE.swap(InstrInfo);
+ FrameLoweringSE.swap(FrameLowering);
+ TLInfoSE.swap(TLInfo);
+ if (!InstrInfo16) {
+ InstrInfo.reset(MipsInstrInfo::create(*this));
+ FrameLowering.reset(MipsFrameLowering::create(*TM, *this));
+ TLInfo.reset(MipsTargetLowering::create(*TM, *this));
+ } else {
+ InstrInfo16.swap(InstrInfo);
+ FrameLowering16.swap(FrameLowering);
+ TLInfo16.swap(TLInfo);
+ }
+ assert(TLInfo && "null target lowering 16");
+ assert(InstrInfo && "null instr info 16");
+ assert(FrameLowering && "null frame lowering 16");
+}
+
+void MipsSubtarget::setHelperClassesMipsSE() {
+ InstrInfo16.swap(InstrInfo);
+ FrameLowering16.swap(FrameLowering);
+ TLInfo16.swap(TLInfo);
+ if (!InstrInfoSE) {
+ InstrInfo.reset(MipsInstrInfo::create(*this));
+ FrameLowering.reset(MipsFrameLowering::create(*TM, *this));
+ TLInfo.reset(MipsTargetLowering::create(*TM, *this));
+ } else {
+ InstrInfoSE.swap(InstrInfo);
+ FrameLoweringSE.swap(FrameLowering);
+ TLInfoSE.swap(TLInfo);
+ }
+ assert(TLInfo && "null target lowering in SE");
+ assert(InstrInfo && "null instr info SE");
+ assert(FrameLowering && "null frame lowering SE");
+}
+
+bool MipsSubtarget::abiUsesSoftFloat() const {
return TM->Options.UseSoftFloat && !InMips16HardFloat;
}
+
+bool MipsSubtarget::useConstantIslands() {
+ DEBUG(dbgs() << "use constant islands " << Mips16ConstantIslands << "\n");
+ return Mips16ConstantIslands;
+}
+
+Reloc::Model MipsSubtarget::getRelocationModel() const {
+ return TM->getRelocationModel();
+}
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