//
//===----------------------------------------------------------------------===//
+#include "Hexagon.h"
+#include "HexagonFixupKinds.h"
#include "HexagonMCTargetDesc.h"
+#include "MCTargetDesc/HexagonBaseInfo.h"
+#include "MCTargetDesc/HexagonMCInstrInfo.h"
#include "llvm/MC/MCAsmBackend.h"
+#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCELFObjectWriter.h"
+#include "llvm/MC/MCFixupKindInfo.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
+using namespace Hexagon;
namespace {
class HexagonAsmBackend : public MCAsmBackend {
+ uint8_t OSABI;
+ StringRef CPU;
+ mutable uint64_t relaxedCnt;
+ std::unique_ptr <MCInstrInfo> MCII;
+ std::unique_ptr <MCInst *> RelaxTarget;
public:
- HexagonAsmBackend(Target const & /*T*/) {}
+ HexagonAsmBackend(Target const &T, uint8_t OSABI, StringRef CPU) :
+ OSABI(OSABI), MCII (T.createMCInstrInfo()), RelaxTarget(new MCInst *){}
+
+ MCObjectWriter *createObjectWriter(raw_pwrite_stream &OS) const override {
+ return createHexagonELFObjectWriter(OS, OSABI, CPU);
+ }
+
+ unsigned getNumFixupKinds() const override {
+ return Hexagon::NumTargetFixupKinds;
+ }
+
+ const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override {
+ const static MCFixupKindInfo Infos[Hexagon::NumTargetFixupKinds] = {
+ // This table *must* be in same the order of fixup_* kinds in
+ // HexagonFixupKinds.h.
+ //
+ // namei offset bits flags
+ {"fixup_Hexagon_B22_PCREL", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_B15_PCREL", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_B7_PCREL", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_LO16", 0, 32, 0},
+ {"fixup_Hexagon_HI16", 0, 32, 0},
+ {"fixup_Hexagon_32", 0, 32, 0},
+ {"fixup_Hexagon_16", 0, 32, 0},
+ {"fixup_Hexagon_8", 0, 32, 0},
+ {"fixup_Hexagon_GPREL16_0", 0, 32, 0},
+ {"fixup_Hexagon_GPREL16_1", 0, 32, 0},
+ {"fixup_Hexagon_GPREL16_2", 0, 32, 0},
+ {"fixup_Hexagon_GPREL16_3", 0, 32, 0},
+ {"fixup_Hexagon_HL16", 0, 32, 0},
+ {"fixup_Hexagon_B13_PCREL", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_B9_PCREL", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_B32_PCREL_X", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_32_6_X", 0, 32, 0},
+ {"fixup_Hexagon_B22_PCREL_X", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_B15_PCREL_X", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_B13_PCREL_X", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_B9_PCREL_X", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_B7_PCREL_X", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_16_X", 0, 32, 0},
+ {"fixup_Hexagon_12_X", 0, 32, 0},
+ {"fixup_Hexagon_11_X", 0, 32, 0},
+ {"fixup_Hexagon_10_X", 0, 32, 0},
+ {"fixup_Hexagon_9_X", 0, 32, 0},
+ {"fixup_Hexagon_8_X", 0, 32, 0},
+ {"fixup_Hexagon_7_X", 0, 32, 0},
+ {"fixup_Hexagon_6_X", 0, 32, 0},
+ {"fixup_Hexagon_32_PCREL", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_COPY", 0, 32, 0},
+ {"fixup_Hexagon_GLOB_DAT", 0, 32, 0},
+ {"fixup_Hexagon_JMP_SLOT", 0, 32, 0},
+ {"fixup_Hexagon_RELATIVE", 0, 32, 0},
+ {"fixup_Hexagon_PLT_B22_PCREL", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_GOTREL_LO16", 0, 32, 0},
+ {"fixup_Hexagon_GOTREL_HI16", 0, 32, 0},
+ {"fixup_Hexagon_GOTREL_32", 0, 32, 0},
+ {"fixup_Hexagon_GOT_LO16", 0, 32, 0},
+ {"fixup_Hexagon_GOT_HI16", 0, 32, 0},
+ {"fixup_Hexagon_GOT_32", 0, 32, 0},
+ {"fixup_Hexagon_GOT_16", 0, 32, 0},
+ {"fixup_Hexagon_DTPMOD_32", 0, 32, 0},
+ {"fixup_Hexagon_DTPREL_LO16", 0, 32, 0},
+ {"fixup_Hexagon_DTPREL_HI16", 0, 32, 0},
+ {"fixup_Hexagon_DTPREL_32", 0, 32, 0},
+ {"fixup_Hexagon_DTPREL_16", 0, 32, 0},
+ {"fixup_Hexagon_GD_PLT_B22_PCREL", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_LD_PLT_B22_PCREL", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_GD_GOT_LO16", 0, 32, 0},
+ {"fixup_Hexagon_GD_GOT_HI16", 0, 32, 0},
+ {"fixup_Hexagon_GD_GOT_32", 0, 32, 0},
+ {"fixup_Hexagon_GD_GOT_16", 0, 32, 0},
+ {"fixup_Hexagon_LD_GOT_LO16", 0, 32, 0},
+ {"fixup_Hexagon_LD_GOT_HI16", 0, 32, 0},
+ {"fixup_Hexagon_LD_GOT_32", 0, 32, 0},
+ {"fixup_Hexagon_LD_GOT_16", 0, 32, 0},
+ {"fixup_Hexagon_IE_LO16", 0, 32, 0},
+ {"fixup_Hexagon_IE_HI16", 0, 32, 0},
+ {"fixup_Hexagon_IE_32", 0, 32, 0},
+ {"fixup_Hexagon_IE_16", 0, 32, 0},
+ {"fixup_Hexagon_IE_GOT_LO16", 0, 32, 0},
+ {"fixup_Hexagon_IE_GOT_HI16", 0, 32, 0},
+ {"fixup_Hexagon_IE_GOT_32", 0, 32, 0},
+ {"fixup_Hexagon_IE_GOT_16", 0, 32, 0},
+ {"fixup_Hexagon_TPREL_LO16", 0, 32, 0},
+ {"fixup_Hexagon_TPREL_HI16", 0, 32, 0},
+ {"fixup_Hexagon_TPREL_32", 0, 32, 0},
+ {"fixup_Hexagon_TPREL_16", 0, 32, 0},
+ {"fixup_Hexagon_6_PCREL_X", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
+ {"fixup_Hexagon_GOTREL_32_6_X", 0, 32, 0},
+ {"fixup_Hexagon_GOTREL_16_X", 0, 32, 0},
+ {"fixup_Hexagon_GOTREL_11_X", 0, 32, 0},
+ {"fixup_Hexagon_GOT_32_6_X", 0, 32, 0},
+ {"fixup_Hexagon_GOT_16_X", 0, 32, 0},
+ {"fixup_Hexagon_GOT_11_X", 0, 32, 0},
+ {"fixup_Hexagon_DTPREL_32_6_X", 0, 32, 0},
+ {"fixup_Hexagon_DTPREL_16_X", 0, 32, 0},
+ {"fixup_Hexagon_DTPREL_11_X", 0, 32, 0},
+ {"fixup_Hexagon_GD_GOT_32_6_X", 0, 32, 0},
+ {"fixup_Hexagon_GD_GOT_16_X", 0, 32, 0},
+ {"fixup_Hexagon_GD_GOT_11_X", 0, 32, 0},
+ {"fixup_Hexagon_LD_GOT_32_6_X", 0, 32, 0},
+ {"fixup_Hexagon_LD_GOT_16_X", 0, 32, 0},
+ {"fixup_Hexagon_LD_GOT_11_X", 0, 32, 0},
+ {"fixup_Hexagon_IE_32_6_X", 0, 32, 0},
+ {"fixup_Hexagon_IE_16_X", 0, 32, 0},
+ {"fixup_Hexagon_IE_GOT_32_6_X", 0, 32, 0},
+ {"fixup_Hexagon_IE_GOT_16_X", 0, 32, 0},
+ {"fixup_Hexagon_IE_GOT_11_X", 0, 32, 0},
+ {"fixup_Hexagon_TPREL_32_6_X", 0, 32, 0},
+ {"fixup_Hexagon_TPREL_16_X", 0, 32, 0},
+ {"fixup_Hexagon_TPREL_11_X", 0, 32, 0}};
+
+ if (Kind < FirstTargetFixupKind) {
+ return MCAsmBackend::getFixupKindInfo(Kind);
+ }
- unsigned getNumFixupKinds() const override { return 0; }
+ assert(unsigned(Kind - FirstTargetFixupKind) < getNumFixupKinds() &&
+ "Invalid kind!");
+ return Infos[Kind - FirstTargetFixupKind];
+ }
void applyFixup(MCFixup const & /*Fixup*/, char * /*Data*/,
unsigned /*DataSize*/, uint64_t /*Value*/,
return;
}
- bool mayNeedRelaxation(MCInst const & /*Inst*/) const override {
+ bool isInstRelaxable(MCInst const &HMI) const {
+ const MCInstrDesc &MCID = HexagonMCInstrInfo::getDesc(*MCII, HMI);
+ bool Relaxable = false;
+ // Branches and loop-setup insns are handled as necessary by relaxation.
+ if (llvm::HexagonMCInstrInfo::getType(*MCII, HMI) == HexagonII::TypeJ ||
+ (llvm::HexagonMCInstrInfo::getType(*MCII, HMI) == HexagonII::TypeNV &&
+ MCID.isBranch()) ||
+ (llvm::HexagonMCInstrInfo::getType(*MCII, HMI) == HexagonII::TypeCR &&
+ HMI.getOpcode() != Hexagon::C4_addipc))
+ if (HexagonMCInstrInfo::isExtendable(*MCII, HMI))
+ Relaxable = true;
+
+ return Relaxable;
+ }
+
+ /// MayNeedRelaxation - Check whether the given instruction may need
+ /// relaxation.
+ ///
+ /// \param Inst - The instruction to test.
+ bool mayNeedRelaxation(MCInst const &Inst) const override {
+ assert(HexagonMCInstrInfo::isBundle(Inst));
+ bool PreviousIsExtender = false;
+ for (auto const &I : HexagonMCInstrInfo::bundleInstructions(Inst)) {
+ auto const &Inst = *I.getInst();
+ if (!PreviousIsExtender) {
+ if (isInstRelaxable(Inst))
+ return true;
+ }
+ PreviousIsExtender = HexagonMCInstrInfo::isImmext(Inst);
+ }
return false;
}
- bool fixupNeedsRelaxation(MCFixup const & /*Fixup*/, uint64_t /*Value*/,
- MCRelaxableFragment const * /*DF*/,
- MCAsmLayout const & /*Layout*/) const override {
- llvm_unreachable("fixupNeedsRelaxation() unimplemented");
+ /// fixupNeedsRelaxation - Target specific predicate for whether a given
+ /// fixup requires the associated instruction to be relaxed.
+ bool fixupNeedsRelaxationAdvanced(const MCFixup &Fixup, bool Resolved,
+ uint64_t Value,
+ const MCRelaxableFragment *DF,
+ const MCAsmLayout &Layout) const override {
+ MCInst const &MCB = DF->getInst();
+ assert(HexagonMCInstrInfo::isBundle(MCB));
+
+ *RelaxTarget = nullptr;
+ MCInst &MCI = const_cast<MCInst &>(HexagonMCInstrInfo::instruction(
+ MCB, Fixup.getOffset() / HEXAGON_INSTR_SIZE));
+ // If we cannot resolve the fixup value, it requires relaxation.
+ if (!Resolved) {
+ switch ((unsigned)Fixup.getKind()) {
+ case fixup_Hexagon_B22_PCREL:
+ // GetFixupCount assumes B22 won't relax
+ // Fallthrough
+ default:
+ return false;
+ break;
+ case fixup_Hexagon_B13_PCREL:
+ case fixup_Hexagon_B15_PCREL:
+ case fixup_Hexagon_B9_PCREL:
+ case fixup_Hexagon_B7_PCREL: {
+ if (HexagonMCInstrInfo::bundleSize(MCB) < HEXAGON_PACKET_SIZE) {
+ ++relaxedCnt;
+ *RelaxTarget = &MCI;
+ return true;
+ } else {
+ return false;
+ }
+ break;
+ }
+ }
+ }
+ bool Relaxable = isInstRelaxable(MCI);
+ if (Relaxable == false)
+ return false;
+
+ MCFixupKind Kind = Fixup.getKind();
+ int64_t sValue = Value;
+ int64_t maxValue;
+
+ switch ((unsigned)Kind) {
+ case fixup_Hexagon_B7_PCREL:
+ maxValue = 1 << 8;
+ break;
+ case fixup_Hexagon_B9_PCREL:
+ maxValue = 1 << 10;
+ break;
+ case fixup_Hexagon_B15_PCREL:
+ maxValue = 1 << 16;
+ break;
+ case fixup_Hexagon_B22_PCREL:
+ maxValue = 1 << 23;
+ break;
+ default:
+ maxValue = INT64_MAX;
+ break;
+ }
+
+ bool isFarAway = -maxValue > sValue || sValue > maxValue - 1;
+
+ if (isFarAway) {
+ if (HexagonMCInstrInfo::bundleSize(MCB) < HEXAGON_PACKET_SIZE) {
+ ++relaxedCnt;
+ *RelaxTarget = &MCI;
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ /// Simple predicate for targets where !Resolved implies requiring relaxation
+ bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value,
+ const MCRelaxableFragment *DF,
+ const MCAsmLayout &Layout) const override {
+ llvm_unreachable("Handled by fixupNeedsRelaxationAdvanced");
}
void relaxInstruction(MCInst const & /*Inst*/,
};
} // end anonymous namespace
-namespace {
-class ELFHexagonAsmBackend : public HexagonAsmBackend {
- uint8_t OSABI;
-
-public:
- ELFHexagonAsmBackend(Target const &T, uint8_t OSABI)
- : HexagonAsmBackend(T), OSABI(OSABI) {}
-
- MCObjectWriter *createObjectWriter(raw_ostream &OS) const override {
- StringRef CPU("HexagonV4");
- return createHexagonELFObjectWriter(OS, OSABI, CPU);
- }
-};
-} // end anonymous namespace
-
namespace llvm {
MCAsmBackend *createHexagonAsmBackend(Target const &T,
MCRegisterInfo const & /*MRI*/,
- StringRef TT, StringRef /*CPU*/) {
- uint8_t OSABI = MCELFObjectTargetWriter::getOSABI(Triple(TT).getOS());
- return new ELFHexagonAsmBackend(T, OSABI);
+ const Triple &TT, StringRef CPU) {
+ uint8_t OSABI = MCELFObjectTargetWriter::getOSABI(TT.getOS());
+ return new HexagonAsmBackend(T, OSABI, CPU);
}
}
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