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-rw-r--r--lib/Target/Mips/MipsSubtarget.cpp175
1 files changed, 53 insertions, 122 deletions
diff --git a/lib/Target/Mips/MipsSubtarget.cpp b/lib/Target/Mips/MipsSubtarget.cpp
index 693daa3..8768b12 100644
--- a/lib/Target/Mips/MipsSubtarget.cpp
+++ b/lib/Target/Mips/MipsSubtarget.cpp
@@ -58,6 +58,10 @@ Mips16ConstantIslands(
cl::desc("MIPS: mips16 constant islands enable."),
cl::init(true));
+static cl::opt<bool>
+GPOpt("mgpopt", cl::Hidden,
+ cl::desc("MIPS: Enable gp-relative addressing of small data items"));
+
/// 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) {
@@ -104,31 +108,32 @@ static std::string computeDataLayout(const MipsSubtarget &ST) {
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),
- 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), RM(_RM), OverrideMode(NoOverride), TM(_TM),
- TargetTriple(TT),
+ const MipsTargetMachine *_TM)
+ : MipsGenSubtargetInfo(TT, CPU, FS), MipsArchVersion(MipsDefault),
+ ABI(MipsABIInfo::Unknown()), IsLittle(little), IsSingleFloat(false),
+ IsFPXX(false), NoABICalls(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), TM(_TM), TargetTriple(TT),
DL(computeDataLayout(initializeSubtargetDependencies(CPU, FS, TM))),
- TSInfo(DL), JITInfo(), InstrInfo(MipsInstrInfo::create(*TM)),
- FrameLowering(MipsFrameLowering::create(*TM, *this)),
- TLInfo(MipsTargetLowering::create(*TM)) {
+ TSInfo(DL), InstrInfo(MipsInstrInfo::create(*this)),
+ FrameLowering(MipsFrameLowering::create(*this)),
+ TLInfo(MipsTargetLowering::create(*TM, *this)) {
PreviousInMips16Mode = InMips16Mode;
- // 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
+ if (MipsArchVersion == MipsDefault)
+ MipsArchVersion = Mips32;
+
+ // Don't even attempt to generate code for MIPS-I, 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);
@@ -136,7 +141,7 @@ MipsSubtarget::MipsSubtarget(const std::string &TT, const std::string &CPU,
report_fatal_error("Code generation for MIPS-V is not implemented", false);
// Assert exactly one ABI was chosen.
- assert(MipsABI != UnknownABI);
+ assert(ABI.IsKnown());
assert((((getFeatureBits() & Mips::FeatureO32) != 0) +
((getFeatureBits() & Mips::FeatureEABI) != 0) +
((getFeatureBits() & Mips::FeatureN32) != 0) +
@@ -153,9 +158,10 @@ MipsSubtarget::MipsSubtarget(const std::string &TT, const std::string &CPU,
false);
if (!isABI_O32() && !useOddSPReg())
- report_fatal_error("-mattr=+nooddspreg is not currently permitted for a "
- "the O32 ABI.",
- false);
+ 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";
@@ -170,21 +176,29 @@ MipsSubtarget::MipsSubtarget(const std::string &TT, const std::string &CPU,
if (TT.find("linux") == std::string::npos)
IsLinux = false;
+ if (NoABICalls && TM->getRelocationModel() == Reloc::PIC_)
+ report_fatal_error("position-independent code requires '-mabicalls'");
+
// Set UseSmallSection.
- // TODO: Investigate the IsLinux check. I suspect it's really checking for
- // bare-metal.
- UseSmallSection = !IsLinux && (RM == Reloc::Static);
+ UseSmallSection = GPOpt;
+ if (!NoABICalls && GPOpt) {
+ errs() << "warning: cannot use small-data accesses for '-mabicalls'"
+ << "\n";
+ UseSmallSection = false;
+ }
}
-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(isGP64bit() ? &Mips::GPR64RegClass
- : &Mips::GPR32RegClass);
- return OptLevel >= CodeGenOpt::Aggressive;
+ CriticalPathRCs.push_back(isGP64bit() ?
+ &Mips::GPR64RegClass : &Mips::GPR32RegClass);
+}
+
+CodeGenOpt::Level MipsSubtarget::getOptLevelToEnablePostRAScheduler() const {
+ return CodeGenOpt::Aggressive;
}
MipsSubtarget &
@@ -197,100 +211,13 @@ MipsSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS,
// Initialize scheduling itinerary for the specified CPU.
InstrItins = getInstrItineraryForCPU(CPUName);
- if (InMips16Mode && !TM->Options.UseSoftFloat) {
- // Hard float for mips16 means essentially to compile as soft float
- // but to use a runtime library for soft float that is written with
- // native mips32 floating point instructions (those runtime routines
- // run in mips32 hard float mode).
- TM->Options.UseSoftFloat = true;
- TM->Options.FloatABIType = FloatABI::Soft;
+ if (InMips16Mode && !TM->Options.UseSoftFloat)
InMips16HardFloat = true;
- }
return *this;
}
-//FIXME: This logic for reseting the subtarget along with
-// the helper classes can probably be simplified but there are a lot of
-// cases so we will defer rewriting this to later.
-//
-void MipsSubtarget::resetSubtarget(MachineFunction *MF) {
- bool ChangeToMips16 = false, ChangeToNoMips16 = false;
- DEBUG(dbgs() << "resetSubtargetFeatures" << "\n");
- AttributeSet FnAttrs = MF->getFunction()->getAttributes();
- ChangeToMips16 = FnAttrs.hasAttribute(AttributeSet::FunctionIndex,
- "mips16");
- ChangeToNoMips16 = FnAttrs.hasAttribute(AttributeSet::FunctionIndex,
- "nomips16");
- assert (!(ChangeToMips16 & ChangeToNoMips16) &&
- "mips16 and nomips16 specified on the same function");
- if (ChangeToMips16) {
- if (PreviousInMips16Mode)
- return;
- OverrideMode = Mips16Override;
- PreviousInMips16Mode = true;
- setHelperClassesMips16();
- return;
- } else if (ChangeToNoMips16) {
- if (!PreviousInMips16Mode)
- return;
- OverrideMode = NoMips16Override;
- PreviousInMips16Mode = false;
- setHelperClassesMipsSE();
- return;
- } else {
- if (OverrideMode == NoOverride)
- return;
- OverrideMode = NoOverride;
- DEBUG(dbgs() << "back to default" << "\n");
- if (inMips16Mode() && !PreviousInMips16Mode) {
- setHelperClassesMips16();
- PreviousInMips16Mode = true;
- } else if (!inMips16Mode() && PreviousInMips16Mode) {
- setHelperClassesMipsSE();
- PreviousInMips16Mode = false;
- }
- return;
- }
-}
-
-void MipsSubtarget::setHelperClassesMips16() {
- InstrInfoSE.swap(InstrInfo);
- FrameLoweringSE.swap(FrameLowering);
- TLInfoSE.swap(TLInfo);
- if (!InstrInfo16) {
- InstrInfo.reset(MipsInstrInfo::create(*TM));
- FrameLowering.reset(MipsFrameLowering::create(*TM, *this));
- TLInfo.reset(MipsTargetLowering::create(*TM));
- } 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(*TM));
- FrameLowering.reset(MipsFrameLowering::create(*TM, *this));
- TLInfo.reset(MipsTargetLowering::create(*TM));
- } 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::mipsSEUsesSoftFloat() const {
+bool MipsSubtarget::abiUsesSoftFloat() const {
return TM->Options.UseSoftFloat && !InMips16HardFloat;
}
@@ -298,3 +225,7 @@ bool MipsSubtarget::useConstantIslands() {
DEBUG(dbgs() << "use constant islands " << Mips16ConstantIslands << "\n");
return Mips16ConstantIslands;
}
+
+Reloc::Model MipsSubtarget::getRelocationModel() const {
+ return TM->getRelocationModel();
+}
generated by cgit v1.1 at 2024-05-20 07:54:47 +0000