-//===-- ARMMCTargetDesc.cpp - ARM Target Descriptions -----------*- C++ -*-===//
+//===-- ARMMCTargetDesc.cpp - ARM Target Descriptions ---------------------===//
//
// The LLVM Compiler Infrastructure
//
//===----------------------------------------------------------------------===//
#include "ARMMCTargetDesc.h"
+#include "ARMMCAsmInfo.h"
+#include "ARMBaseInfo.h"
+#include "InstPrinter/ARMInstPrinter.h"
+#include "llvm/MC/MCCodeGenInfo.h"
+#include "llvm/MC/MCInstrAnalysis.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
-#include "llvm/Target/TargetRegistry.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/TargetRegistry.h"
#define GET_REGINFO_MC_DESC
#include "ARMGenRegisterInfo.inc"
using namespace llvm;
-MCInstrInfo *createARMMCInstrInfo() {
- MCInstrInfo *X = new MCInstrInfo();
- InitARMMCInstrInfo(X);
- return X;
-}
-
-MCRegisterInfo *createARMMCRegisterInfo() {
- MCRegisterInfo *X = new MCRegisterInfo();
- InitARMMCRegisterInfo(X);
- return X;
-}
-
-MCSubtargetInfo *createARMMCSubtargetInfo(StringRef TT, StringRef CPU,
- StringRef FS) {
- MCSubtargetInfo *X = new MCSubtargetInfo();
- InitARMMCSubtargetInfo(X, CPU, FS);
- return X;
-}
-
-// Force static initialization.
-extern "C" void LLVMInitializeARMMCInstrInfo() {
- RegisterMCInstrInfo<MCInstrInfo> X(TheARMTarget);
- RegisterMCInstrInfo<MCInstrInfo> Y(TheThumbTarget);
-
- TargetRegistry::RegisterMCInstrInfo(TheARMTarget, createARMMCInstrInfo);
- TargetRegistry::RegisterMCInstrInfo(TheThumbTarget, createARMMCInstrInfo);
-}
-
-extern "C" void LLVMInitializeARMMCRegInfo() {
- RegisterMCRegInfo<MCRegisterInfo> X(TheARMTarget);
- RegisterMCRegInfo<MCRegisterInfo> Y(TheThumbTarget);
-
- TargetRegistry::RegisterMCRegInfo(TheARMTarget, createARMMCRegisterInfo);
- TargetRegistry::RegisterMCRegInfo(TheThumbTarget, createARMMCRegisterInfo);
-}
-
-extern "C" void LLVMInitializeARMMCSubtargetInfo() {
- RegisterMCSubtargetInfo<MCSubtargetInfo> X(TheARMTarget);
- RegisterMCSubtargetInfo<MCSubtargetInfo> Y(TheThumbTarget);
-
- TargetRegistry::RegisterMCSubtargetInfo(TheARMTarget,
- createARMMCSubtargetInfo);
- TargetRegistry::RegisterMCSubtargetInfo(TheThumbTarget,
- createARMMCSubtargetInfo);
-}
-
-std::string ARM_MC::ParseARMTriple(StringRef TT, bool &IsThumb) {
+std::string ARM_MC::ParseARMTriple(StringRef TT, StringRef CPU) {
// Set the boolean corresponding to the current target triple, or the default
// if one cannot be determined, to true.
unsigned Len = TT.size();
unsigned Idx = 0;
+ // FIXME: Enhance Triple helper class to extract ARM version.
+ bool isThumb = false;
if (Len >= 5 && TT.substr(0, 4) == "armv")
Idx = 4;
else if (Len >= 6 && TT.substr(0, 5) == "thumb") {
- IsThumb = true;
+ isThumb = true;
if (Len >= 7 && TT[5] == 'v')
Idx = 6;
}
+ bool NoCPU = CPU == "generic" || CPU.empty();
std::string ARMArchFeature;
if (Idx) {
unsigned SubVer = TT[Idx];
if (SubVer >= '7' && SubVer <= '9') {
if (Len >= Idx+2 && TT[Idx+1] == 'm') {
- // v7m: FeatureNoARM, FeatureDB, FeatureHWDiv
- ARMArchFeature = "+v7,+noarm,+db,+hwdiv";
+ if (NoCPU)
+ // v7m: FeatureNoARM, FeatureDB, FeatureHWDiv, FeatureMClass
+ ARMArchFeature = "+v7,+noarm,+db,+hwdiv,+mclass";
+ else
+ // Use CPU to figure out the exact features.
+ ARMArchFeature = "+v7";
} else if (Len >= Idx+3 && TT[Idx+1] == 'e'&& TT[Idx+2] == 'm') {
- // v7em: FeatureNoARM, FeatureDB, FeatureHWDiv, FeatureDSPThumb2,
- // FeatureT2XtPk
- ARMArchFeature = "+v7,+noarm,+db,+hwdiv,+t2dsp,t2xtpk";
- } else
- // v7a: FeatureNEON, FeatureDB, FeatureDSPThumb2
- ARMArchFeature = "+v7,+neon,+db,+t2dsp";
+ if (NoCPU)
+ // v7em: FeatureNoARM, FeatureDB, FeatureHWDiv, FeatureDSPThumb2,
+ // FeatureT2XtPk, FeatureMClass
+ ARMArchFeature = "+v7,+noarm,+db,+hwdiv,+t2dsp,t2xtpk,+mclass";
+ else
+ // Use CPU to figure out the exact features.
+ ARMArchFeature = "+v7";
+ } else {
+ // v7 CPUs have lots of different feature sets. If no CPU is specified,
+ // then assume v7a (e.g. cortex-a8) feature set. Otherwise, return
+ // the "minimum" feature set and use CPU string to figure out the exact
+ // features.
+ if (NoCPU)
+ // v7a: FeatureNEON, FeatureDB, FeatureDSPThumb2, FeatureT2XtPk
+ ARMArchFeature = "+v7,+neon,+db,+t2dsp,+t2xtpk";
+ else
+ // Use CPU to figure out the exact features.
+ ARMArchFeature = "+v7";
+ }
} else if (SubVer == '6') {
if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == '2')
ARMArchFeature = "+v6t2";
- else
+ else if (Len >= Idx+2 && TT[Idx+1] == 'm') {
+ if (NoCPU)
+ // v6m: FeatureNoARM, FeatureMClass
+ ARMArchFeature = "+v6,+noarm,+mclass";
+ else
+ ARMArchFeature = "+v6";
+ } else
ARMArchFeature = "+v6";
} else if (SubVer == '5') {
if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == 'e')
ARMArchFeature = "+v4t";
}
+ if (isThumb) {
+ if (ARMArchFeature.empty())
+ ARMArchFeature = "+thumb-mode";
+ else
+ ARMArchFeature += ",+thumb-mode";
+ }
+
return ARMArchFeature;
}
+
+MCSubtargetInfo *ARM_MC::createARMMCSubtargetInfo(StringRef TT, StringRef CPU,
+ StringRef FS) {
+ std::string ArchFS = ARM_MC::ParseARMTriple(TT, CPU);
+ if (!FS.empty()) {
+ if (!ArchFS.empty())
+ ArchFS = ArchFS + "," + FS.str();
+ else
+ ArchFS = FS;
+ }
+
+ MCSubtargetInfo *X = new MCSubtargetInfo();
+ InitARMMCSubtargetInfo(X, TT, CPU, ArchFS);
+ return X;
+}
+
+static MCInstrInfo *createARMMCInstrInfo() {
+ MCInstrInfo *X = new MCInstrInfo();
+ InitARMMCInstrInfo(X);
+ return X;
+}
+
+static MCRegisterInfo *createARMMCRegisterInfo(StringRef Triple) {
+ MCRegisterInfo *X = new MCRegisterInfo();
+ InitARMMCRegisterInfo(X, ARM::LR);
+ return X;
+}
+
+static MCAsmInfo *createARMMCAsmInfo(const Target &T, StringRef TT) {
+ Triple TheTriple(TT);
+
+ if (TheTriple.isOSDarwin())
+ return new ARMMCAsmInfoDarwin();
+
+ return new ARMELFMCAsmInfo();
+}
+
+static MCCodeGenInfo *createARMMCCodeGenInfo(StringRef TT, Reloc::Model RM,
+ CodeModel::Model CM,
+ CodeGenOpt::Level OL) {
+ MCCodeGenInfo *X = new MCCodeGenInfo();
+ if (RM == Reloc::Default) {
+ Triple TheTriple(TT);
+ // Default relocation model on Darwin is PIC, not DynamicNoPIC.
+ RM = TheTriple.isOSDarwin() ? Reloc::PIC_ : Reloc::DynamicNoPIC;
+ }
+ X->InitMCCodeGenInfo(RM, CM, OL);
+ return X;
+}
+
+// This is duplicated code. Refactor this.
+static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
+ MCContext &Ctx, MCAsmBackend &MAB,
+ raw_ostream &OS,
+ MCCodeEmitter *Emitter,
+ bool RelaxAll,
+ bool NoExecStack) {
+ Triple TheTriple(TT);
+
+ if (TheTriple.isOSDarwin())
+ return createMachOStreamer(Ctx, MAB, OS, Emitter, false);
+
+ if (TheTriple.isOSWindows()) {
+ llvm_unreachable("ARM does not support Windows COFF format");
+ }
+
+ return createELFStreamer(Ctx, MAB, OS, Emitter, false, NoExecStack);
+}
+
+static MCInstPrinter *createARMMCInstPrinter(const Target &T,
+ unsigned SyntaxVariant,
+ const MCAsmInfo &MAI,
+ const MCInstrInfo &MII,
+ const MCRegisterInfo &MRI,
+ const MCSubtargetInfo &STI) {
+ if (SyntaxVariant == 0)
+ return new ARMInstPrinter(MAI, MII, MRI, STI);
+ return 0;
+}
+
+namespace {
+
+class ARMMCInstrAnalysis : public MCInstrAnalysis {
+public:
+ ARMMCInstrAnalysis(const MCInstrInfo *Info) : MCInstrAnalysis(Info) {}
+
+ virtual bool isUnconditionalBranch(const MCInst &Inst) const {
+ // BCCs with the "always" predicate are unconditional branches.
+ if (Inst.getOpcode() == ARM::Bcc && Inst.getOperand(1).getImm()==ARMCC::AL)
+ return true;
+ return MCInstrAnalysis::isUnconditionalBranch(Inst);
+ }
+
+ virtual bool isConditionalBranch(const MCInst &Inst) const {
+ // BCCs with the "always" predicate are unconditional branches.
+ if (Inst.getOpcode() == ARM::Bcc && Inst.getOperand(1).getImm()==ARMCC::AL)
+ return false;
+ return MCInstrAnalysis::isConditionalBranch(Inst);
+ }
+
+ uint64_t evaluateBranch(const MCInst &Inst, uint64_t Addr,
+ uint64_t Size) const {
+ // We only handle PCRel branches for now.
+ if (Info->get(Inst.getOpcode()).OpInfo[0].OperandType!=MCOI::OPERAND_PCREL)
+ return -1ULL;
+
+ int64_t Imm = Inst.getOperand(0).getImm();
+ // FIXME: This is not right for thumb.
+ return Addr+Imm+8; // In ARM mode the PC is always off by 8 bytes.
+ }
+};
+
+}
+
+static MCInstrAnalysis *createARMMCInstrAnalysis(const MCInstrInfo *Info) {
+ return new ARMMCInstrAnalysis(Info);
+}
+
+// Force static initialization.
+extern "C" void LLVMInitializeARMTargetMC() {
+ // Register the MC asm info.
+ RegisterMCAsmInfoFn A(TheARMTarget, createARMMCAsmInfo);
+ RegisterMCAsmInfoFn B(TheThumbTarget, createARMMCAsmInfo);
+
+ // Register the MC codegen info.
+ TargetRegistry::RegisterMCCodeGenInfo(TheARMTarget, createARMMCCodeGenInfo);
+ TargetRegistry::RegisterMCCodeGenInfo(TheThumbTarget, createARMMCCodeGenInfo);
+
+ // Register the MC instruction info.
+ TargetRegistry::RegisterMCInstrInfo(TheARMTarget, createARMMCInstrInfo);
+ TargetRegistry::RegisterMCInstrInfo(TheThumbTarget, createARMMCInstrInfo);
+
+ // Register the MC register info.
+ TargetRegistry::RegisterMCRegInfo(TheARMTarget, createARMMCRegisterInfo);
+ TargetRegistry::RegisterMCRegInfo(TheThumbTarget, createARMMCRegisterInfo);
+
+ // Register the MC subtarget info.
+ TargetRegistry::RegisterMCSubtargetInfo(TheARMTarget,
+ ARM_MC::createARMMCSubtargetInfo);
+ TargetRegistry::RegisterMCSubtargetInfo(TheThumbTarget,
+ ARM_MC::createARMMCSubtargetInfo);
+
+ // Register the MC instruction analyzer.
+ TargetRegistry::RegisterMCInstrAnalysis(TheARMTarget,
+ createARMMCInstrAnalysis);
+ TargetRegistry::RegisterMCInstrAnalysis(TheThumbTarget,
+ createARMMCInstrAnalysis);
+
+ // Register the MC Code Emitter
+ TargetRegistry::RegisterMCCodeEmitter(TheARMTarget, createARMMCCodeEmitter);
+ TargetRegistry::RegisterMCCodeEmitter(TheThumbTarget, createARMMCCodeEmitter);
+
+ // Register the asm backend.
+ TargetRegistry::RegisterMCAsmBackend(TheARMTarget, createARMAsmBackend);
+ TargetRegistry::RegisterMCAsmBackend(TheThumbTarget, createARMAsmBackend);
+
+ // Register the object streamer.
+ TargetRegistry::RegisterMCObjectStreamer(TheARMTarget, createMCStreamer);
+ TargetRegistry::RegisterMCObjectStreamer(TheThumbTarget, createMCStreamer);
+
+ // Register the MCInstPrinter.
+ TargetRegistry::RegisterMCInstPrinter(TheARMTarget, createARMMCInstPrinter);
+ TargetRegistry::RegisterMCInstPrinter(TheThumbTarget, createARMMCInstPrinter);
+}
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