6a371c7744
This implements [the `.option exact` and `.option noexact` proposal](https://github.com/riscv-non-isa/riscv-asm-manual/pull/122) for RISC-V. `.option exact` turns off: - Compression - Branch Relaxation - Linker Relaxation `.option noexact` turns these back on, and is also the default, matching the current behaviour.
81 lines
3.0 KiB
C++
81 lines
3.0 KiB
C++
//===-- RISCVELFStreamer.h - RISC-V ELF Target Streamer ---------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVELFSTREAMER_H
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#define LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVELFSTREAMER_H
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#include "RISCVTargetStreamer.h"
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#include "llvm/MC/MCELFStreamer.h"
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namespace llvm {
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class RISCVELFStreamer : public MCELFStreamer {
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void reset() override;
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void emitDataMappingSymbol();
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void emitInstructionsMappingSymbol();
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void emitMappingSymbol(StringRef Name);
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enum ElfMappingSymbol { EMS_None, EMS_Instructions, EMS_Data };
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DenseMap<const MCSection *, ElfMappingSymbol> LastMappingSymbols;
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ElfMappingSymbol LastEMS = EMS_None;
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public:
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RISCVELFStreamer(MCContext &C, std::unique_ptr<MCAsmBackend> MAB,
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std::unique_ptr<MCObjectWriter> MOW,
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std::unique_ptr<MCCodeEmitter> MCE)
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: MCELFStreamer(C, std::move(MAB), std::move(MOW), std::move(MCE)) {}
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void changeSection(MCSection *Section, uint32_t Subsection) override;
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void emitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;
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void emitBytes(StringRef Data) override;
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void emitFill(const MCExpr &NumBytes, uint64_t FillValue, SMLoc Loc) override;
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void emitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc) override;
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};
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class RISCVTargetELFStreamer : public RISCVTargetStreamer {
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private:
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StringRef CurrentVendor;
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MCSection *AttributeSection = nullptr;
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void emitAttribute(unsigned Attribute, unsigned Value) override;
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void emitTextAttribute(unsigned Attribute, StringRef String) override;
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void emitIntTextAttribute(unsigned Attribute, unsigned IntValue,
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StringRef StringValue) override;
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void finishAttributeSection() override;
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void reset() override;
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public:
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RISCVELFStreamer &getStreamer();
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RISCVTargetELFStreamer(MCStreamer &S, const MCSubtargetInfo &STI);
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void emitDirectiveOptionExact() override;
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void emitDirectiveOptionNoExact() override;
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void emitDirectiveOptionPIC() override;
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void emitDirectiveOptionNoPIC() override;
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void emitDirectiveOptionPop() override;
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void emitDirectiveOptionPush() override;
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void emitDirectiveOptionRelax() override;
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void emitDirectiveOptionNoRelax() override;
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void emitDirectiveOptionRVC() override;
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void emitDirectiveOptionNoRVC() override;
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void emitDirectiveVariantCC(MCSymbol &Symbol) override;
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void finish() override;
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};
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MCStreamer *createRISCVELFStreamer(const Triple &, MCContext &C,
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std::unique_ptr<MCAsmBackend> &&MAB,
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std::unique_ptr<MCObjectWriter> &&MOW,
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std::unique_ptr<MCCodeEmitter> &&MCE);
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} // namespace llvm
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#endif // LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVELFSTREAMER_H
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