111 lines
3.5 KiB
C++
111 lines
3.5 KiB
C++
//===-- CSKYTargetStreamer.h - CSKY 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_CSKY_CSKYTARGETSTREAMER_H
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#define LLVM_LIB_TARGET_CSKY_CSKYTARGETSTREAMER_H
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#include "MCTargetDesc/CSKYMCExpr.h"
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#include "llvm/MC/ConstantPools.h"
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#include "llvm/MC/MCStreamer.h"
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namespace llvm {
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class CSKYConstantPool {
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using EntryVecTy = SmallVector<ConstantPoolEntry, 4>;
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EntryVecTy Entries;
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std::map<int64_t, const MCSymbolRefExpr *> CachedEntries;
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MCSection *CurrentSection = nullptr;
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public:
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// Initialize a new empty constant pool
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CSKYConstantPool() = default;
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// Add a new entry to the constant pool in the next slot.
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// \param Value is the new entry to put in the constant pool.
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// \param Size is the size in bytes of the entry
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//
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// \returns a MCExpr that references the newly inserted value
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const MCExpr *addEntry(MCStreamer &Streamer, const MCExpr *Value,
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unsigned Size, SMLoc Loc, const MCExpr *AdjustExpr);
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void emitAll(MCStreamer &Streamer);
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// Return true if the constant pool is empty
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bool empty();
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void clearCache();
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};
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class CSKYTargetStreamer : public MCTargetStreamer {
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public:
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typedef struct {
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const MCSymbol *sym;
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CSKYMCExpr::VariantKind kind;
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} SymbolIndex;
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protected:
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std::unique_ptr<CSKYConstantPool> ConstantPool;
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DenseMap<SymbolIndex, const MCExpr *> ConstantMap;
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unsigned ConstantCounter = 0;
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public:
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CSKYTargetStreamer(MCStreamer &S);
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virtual void emitTextAttribute(unsigned Attribute, StringRef String);
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virtual void emitAttribute(unsigned Attribute, unsigned Value);
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virtual void finishAttributeSection();
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virtual void emitTargetAttributes(const MCSubtargetInfo &STI);
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/// Add a new entry to the constant pool for the current section and return an
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/// MCExpr that can be used to refer to the constant pool location.
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const MCExpr *addConstantPoolEntry(const MCExpr *, SMLoc Loc,
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const MCExpr *AdjustExpr = nullptr);
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void emitCurrentConstantPool();
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void finish() override;
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};
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template <> struct DenseMapInfo<CSKYTargetStreamer::SymbolIndex> {
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static inline CSKYTargetStreamer::SymbolIndex getEmptyKey() {
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return {nullptr, CSKYMCExpr::VK_CSKY_Invalid};
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}
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static inline CSKYTargetStreamer::SymbolIndex getTombstoneKey() {
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return {nullptr, CSKYMCExpr::VK_CSKY_Invalid};
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}
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static unsigned getHashValue(const CSKYTargetStreamer::SymbolIndex &V) {
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return hash_combine(DenseMapInfo<const MCSymbol *>::getHashValue(V.sym),
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DenseMapInfo<int>::getHashValue(V.kind));
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}
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static bool isEqual(const CSKYTargetStreamer::SymbolIndex &A,
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const CSKYTargetStreamer::SymbolIndex &B) {
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return A.sym == B.sym && A.kind == B.kind;
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}
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};
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class formatted_raw_ostream;
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class CSKYTargetAsmStreamer : public CSKYTargetStreamer {
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formatted_raw_ostream &OS;
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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 finishAttributeSection() override;
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public:
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CSKYTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS)
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: CSKYTargetStreamer(S), OS(OS) {}
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};
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} // namespace llvm
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#endif // LLVM_LIB_TARGET_CSKY_CSKYTARGETSTREAMER_H
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