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//===-- CSKYTargetStreamer.h - CSKY Target Streamer ----------*- C++ -*----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_CSKY_CSKYTARGETSTREAMER_H
#define LLVM_LIB_TARGET_CSKY_CSKYTARGETSTREAMER_H
#include "MCTargetDesc/CSKYMCExpr.h"
#include "llvm/MC/ConstantPools.h"
#include "llvm/MC/MCStreamer.h"
namespace llvm {
class CSKYConstantPool {
using EntryVecTy = SmallVector<ConstantPoolEntry, 4>;
EntryVecTy Entries;
std::map<int64_t, const MCSymbolRefExpr *> CachedEntries;
MCSection *CurrentSection = nullptr;
public:
// Initialize a new empty constant pool
CSKYConstantPool() = default;
// Add a new entry to the constant pool in the next slot.
// \param Value is the new entry to put in the constant pool.
// \param Size is the size in bytes of the entry
//
// \returns a MCExpr that references the newly inserted value
const MCExpr *addEntry(MCStreamer &Streamer, const MCExpr *Value,
unsigned Size, SMLoc Loc, const MCExpr *AdjustExpr);
void emitAll(MCStreamer &Streamer);
// Return true if the constant pool is empty
bool empty();
void clearCache();
};
class CSKYTargetStreamer : public MCTargetStreamer {
public:
typedef struct {
const MCSymbol *sym;
CSKYMCExpr::VariantKind kind;
} SymbolIndex;
protected:
std::unique_ptr<CSKYConstantPool> ConstantPool;
DenseMap<SymbolIndex, const MCExpr *> ConstantMap;
unsigned ConstantCounter = 0;
public:
CSKYTargetStreamer(MCStreamer &S);
virtual void emitTextAttribute(unsigned Attribute, StringRef String);
virtual void emitAttribute(unsigned Attribute, unsigned Value);
virtual void finishAttributeSection();
virtual void emitTargetAttributes(const MCSubtargetInfo &STI);
/// Add a new entry to the constant pool for the current section and return an
/// MCExpr that can be used to refer to the constant pool location.
const MCExpr *addConstantPoolEntry(const MCExpr *, SMLoc Loc,
const MCExpr *AdjustExpr = nullptr);
void emitCurrentConstantPool();
void finish() override;
};
template <> struct DenseMapInfo<CSKYTargetStreamer::SymbolIndex> {
static inline CSKYTargetStreamer::SymbolIndex getEmptyKey() {
return {nullptr, CSKYMCExpr::VK_CSKY_Invalid};
}
static inline CSKYTargetStreamer::SymbolIndex getTombstoneKey() {
return {nullptr, CSKYMCExpr::VK_CSKY_Invalid};
}
static unsigned getHashValue(const CSKYTargetStreamer::SymbolIndex &V) {
return hash_combine(DenseMapInfo<const MCSymbol *>::getHashValue(V.sym),
DenseMapInfo<int>::getHashValue(V.kind));
}
static bool isEqual(const CSKYTargetStreamer::SymbolIndex &A,
const CSKYTargetStreamer::SymbolIndex &B) {
return A.sym == B.sym && A.kind == B.kind;
}
};
class formatted_raw_ostream;
class CSKYTargetAsmStreamer : public CSKYTargetStreamer {
formatted_raw_ostream &OS;
void emitAttribute(unsigned Attribute, unsigned Value) override;
void emitTextAttribute(unsigned Attribute, StringRef String) override;
void finishAttributeSection() override;
public:
CSKYTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS)
: CSKYTargetStreamer(S), OS(OS) {}
};
} // namespace llvm
#endif // LLVM_LIB_TARGET_CSKY_CSKYTARGETSTREAMER_H
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