#ifndef LLVM_MC_MCSYMBOL_H
#define LLVM_MC_MCSYMBOL_H
-#include "llvm/ADT/PointerIntPair.h"
#include "llvm/ADT/StringMap.h"
+#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/Support/Compiler.h"
/// held by the StringMap that lives in MCContext.
const StringMapEntry<bool> *Name;
- /// The section the symbol is defined in. This is null for undefined symbols,
- /// and the special AbsolutePseudoSection value for absolute symbols. If this
- /// is a variable symbol, this caches the variable value's section.
- mutable MCSection *Section;
+ /// If a symbol has a Fragment, the section is implied, so we only need
+ /// one pointer.
+ /// FIXME: We might be able to simplify this by having the asm streamer create
+ /// dummy fragments.
+ union {
+ /// The section the symbol is defined in. This is null for undefined
+ /// symbols, and the special AbsolutePseudoSection value for absolute
+ /// symbols. If this is a variable symbol, this caches the variable value's
+ /// section.
+ mutable MCSection *Section;
+
+ /// The fragment this symbol's value is relative to, if any.
+ mutable MCFragment *Fragment;
+ };
/// Value - If non-null, the value for a variable symbol.
const MCExpr *Value;
/// IsUsed - True if this symbol has been used.
mutable unsigned IsUsed : 1;
- mutable bool HasData : 1;
+ mutable bool IsRegistered : 1;
+
+ /// This symbol is visible outside this translation unit.
+ mutable unsigned IsExternal : 1;
+
+ /// This symbol is private extern.
+ mutable unsigned IsPrivateExtern : 1;
+
+ mutable unsigned HasFragment : 1;
/// Index field, for use by the object file implementation.
- mutable uint64_t Index : 60;
+ mutable uint32_t Index = 0;
/// An expression describing how to calculate the size of a symbol. If a
/// symbol has no size this field will be NULL.
const MCExpr *SymbolSize = nullptr;
- /// The alignment of the symbol, if it is 'common', or -1.
- //
- // FIXME: Pack this in with other fields?
- unsigned CommonAlign = -1U;
-
union {
/// The offset to apply to the fragment address to form this symbol's value.
uint64_t Offset;
uint64_t CommonSize;
};
+ /// The alignment of the symbol, if it is 'common', or -1.
+ //
+ // FIXME: Pack this in with other fields?
+ unsigned CommonAlign = -1U;
+
/// The Flags field is used by object file implementations to store
/// additional per symbol information which is not easily classified.
mutable uint32_t Flags = 0;
- /// The fragment this symbol's value is relative to, if any. Also stores if
- /// this symbol is visible outside this translation unit (bit 0) or if it is
- /// private extern (bit 1).
- mutable PointerIntPair<MCFragment *, 2> Fragment;
-
private: // MCContext creates and uniques these.
friend class MCExpr;
friend class MCContext;
MCSymbol(const StringMapEntry<bool> *Name, bool isTemporary)
: Name(Name), Section(nullptr), Value(nullptr), IsTemporary(isTemporary),
- IsRedefinable(false), IsUsed(false), HasData(false), Index(0) {
+ IsRedefinable(false), IsUsed(false), IsRegistered(false),
+ IsExternal(false), IsPrivateExtern(false), HasFragment(false) {
Offset = 0;
}
MCSymbol(const MCSymbol &) = delete;
void operator=(const MCSymbol &) = delete;
MCSection *getSectionPtr() const {
+ if (MCFragment *F = getFragment())
+ return F->getParent();
+ assert(!HasFragment);
if (Section || !Value)
return Section;
return Section = Value->findAssociatedSection();
/// getName - Get the symbol name.
StringRef getName() const { return Name ? Name->first() : ""; }
- bool hasData() const { return HasData; }
-
- /// Initialize symbol data.
- ///
- /// Nothing really to do here, but this is enables an assertion that \a
- /// MCAssembler::getOrCreateSymbolData() has actually been called before
- /// anyone calls \a getData().
- void initializeData() const { HasData = true; }
+ bool isRegistered() const { return IsRegistered; }
+ void setIsRegistered(bool Value) const { IsRegistered = Value; }
/// \name Accessors
/// @{
if (IsRedefinable) {
Value = nullptr;
Section = nullptr;
+ HasFragment = false;
IsRedefinable = false;
}
}
/// Mark the symbol as defined in the section \p S.
void setSection(MCSection &S) {
assert(!isVariable() && "Cannot set section of variable");
+ assert(!HasFragment);
Section = &S;
}
- /// setUndefined - Mark the symbol as undefined.
- void setUndefined() { Section = nullptr; }
+ /// Mark the symbol as undefined.
+ void setUndefined() {
+ HasFragment = false;
+ Section = nullptr;
+ }
/// @}
/// \name Variable Symbols
/// @}
/// Get the (implementation defined) index.
- uint64_t getIndex() const {
- assert(HasData && "Uninitialized symbol data");
+ uint32_t getIndex() const {
return Index;
}
/// Set the (implementation defined) index.
- void setIndex(uint64_t Value) const {
- assert(HasData && "Uninitialized symbol data");
- assert(!(Value >> 60) && "Not enough bits for value");
+ void setIndex(uint32_t Value) const {
Index = Value;
}
Flags = (Flags & ~Mask) | Value;
}
- MCFragment *getFragment() const { return Fragment.getPointer(); }
- void setFragment(MCFragment *Value) const { Fragment.setPointer(Value); }
-
- bool isExternal() const { return Fragment.getInt() & 1; }
- void setExternal(bool Value) const {
- Fragment.setInt((Fragment.getInt() & ~1) | unsigned(Value));
+ MCFragment *getFragment() const {
+ if (!HasFragment)
+ return nullptr;
+ return Fragment;
}
-
- bool isPrivateExtern() const { return Fragment.getInt() & 2; }
- void setPrivateExtern(bool Value) {
- Fragment.setInt((Fragment.getInt() & ~2) | (unsigned(Value) << 1));
+ void setFragment(MCFragment *Value) const {
+ HasFragment = true;
+ Fragment = Value;
}
+ bool isExternal() const { return IsExternal; }
+ void setExternal(bool Value) const { IsExternal = Value; }
+
+ bool isPrivateExtern() const { return IsPrivateExtern; }
+ void setPrivateExtern(bool Value) { IsPrivateExtern = Value; }
+
/// print - Print the value to the stream \p OS.
void print(raw_ostream &OS) const;
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