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MC: clang-format MCSymbol.h, NFC
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237297 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
parent
b11a191088
commit
da645e31a7
@ -19,166 +19,154 @@
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#include "llvm/Support/Compiler.h"
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namespace llvm {
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class MCExpr;
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class MCSection;
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class MCContext;
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class raw_ostream;
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class MCExpr;
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class MCSection;
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class MCContext;
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class raw_ostream;
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/// MCSymbol - Instances of this class represent a symbol name in the MC file,
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/// and MCSymbols are created and uniqued by the MCContext class. MCSymbols
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/// should only be constructed with valid names for the object file.
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///
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/// If the symbol is defined/emitted into the current translation unit, the
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/// Section member is set to indicate what section it lives in. Otherwise, if
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/// it is a reference to an external entity, it has a null section.
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class MCSymbol {
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// Special sentinal value for the absolute pseudo section.
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//
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// FIXME: Use a PointerInt wrapper for this?
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static const MCSection *AbsolutePseudoSection;
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/// MCSymbol - Instances of this class represent a symbol name in the MC file,
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/// and MCSymbols are created and uniqued by the MCContext class. MCSymbols
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/// should only be constructed with valid names for the object file.
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///
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/// If the symbol is defined/emitted into the current translation unit, the
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/// Section member is set to indicate what section it lives in. Otherwise, if
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/// it is a reference to an external entity, it has a null section.
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class MCSymbol {
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// Special sentinal value for the absolute pseudo section.
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//
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// FIXME: Use a PointerInt wrapper for this?
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static const MCSection *AbsolutePseudoSection;
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/// Name - The name of the symbol. The referred-to string data is actually
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/// held by the StringMap that lives in MCContext.
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StringRef Name;
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/// Name - The name of the symbol. The referred-to string data is actually
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/// held by the StringMap that lives in MCContext.
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StringRef Name;
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/// Section - The section the symbol is defined in. This is null for
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/// undefined symbols, and the special AbsolutePseudoSection value for
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/// absolute symbols. If this is a variable symbol, this caches the
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/// variable value's section.
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mutable const MCSection *Section;
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/// Section - The section the symbol is defined in. This is null for
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/// undefined symbols, and the special AbsolutePseudoSection value for
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/// absolute symbols. If this is a variable symbol, this caches the
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/// variable value's section.
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mutable const MCSection *Section;
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/// Value - If non-null, the value for a variable symbol.
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const MCExpr *Value;
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/// Value - If non-null, the value for a variable symbol.
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const MCExpr *Value;
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/// IsTemporary - True if this is an assembler temporary label, which
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/// typically does not survive in the .o file's symbol table. Usually
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/// "Lfoo" or ".foo".
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unsigned IsTemporary : 1;
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/// IsTemporary - True if this is an assembler temporary label, which
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/// typically does not survive in the .o file's symbol table. Usually
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/// "Lfoo" or ".foo".
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unsigned IsTemporary : 1;
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/// \brief True if this symbol can be redefined.
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unsigned IsRedefinable : 1;
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/// \brief True if this symbol can be redefined.
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unsigned IsRedefinable : 1;
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/// IsUsed - True if this symbol has been used.
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mutable unsigned IsUsed : 1;
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/// IsUsed - True if this symbol has been used.
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mutable unsigned IsUsed : 1;
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private: // MCContext creates and uniques these.
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friend class MCExpr;
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friend class MCContext;
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MCSymbol(StringRef name, bool isTemporary)
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: Name(name), Section(nullptr), Value(nullptr),
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IsTemporary(isTemporary), IsRedefinable(false), IsUsed(false) {}
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private: // MCContext creates and uniques these.
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friend class MCExpr;
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friend class MCContext;
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MCSymbol(StringRef name, bool isTemporary)
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: Name(name), Section(nullptr), Value(nullptr), IsTemporary(isTemporary),
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IsRedefinable(false), IsUsed(false) {}
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MCSymbol(const MCSymbol&) = delete;
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void operator=(const MCSymbol&) = delete;
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const MCSection *getSectionPtr() const {
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if (Section || !Value)
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return Section;
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return Section = Value->FindAssociatedSection();
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}
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public:
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/// getName - Get the symbol name.
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StringRef getName() const { return Name; }
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/// \name Accessors
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/// @{
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/// isTemporary - Check if this is an assembler temporary symbol.
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bool isTemporary() const { return IsTemporary; }
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/// isUsed - Check if this is used.
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bool isUsed() const { return IsUsed; }
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void setUsed(bool Value) const { IsUsed = Value; }
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/// \brief Check if this symbol is redefinable.
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bool isRedefinable() const { return IsRedefinable; }
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/// \brief Mark this symbol as redefinable.
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void setRedefinable(bool Value) { IsRedefinable = Value; }
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/// \brief Prepare this symbol to be redefined.
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void redefineIfPossible() {
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if (IsRedefinable) {
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Value = nullptr;
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Section = nullptr;
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IsRedefinable = false;
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}
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}
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/// @}
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/// \name Associated Sections
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/// @{
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/// isDefined - Check if this symbol is defined (i.e., it has an address).
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///
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/// Defined symbols are either absolute or in some section.
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bool isDefined() const {
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return getSectionPtr() != nullptr;
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}
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/// isInSection - Check if this symbol is defined in some section (i.e., it
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/// is defined but not absolute).
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bool isInSection() const {
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return isDefined() && !isAbsolute();
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}
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/// isUndefined - Check if this symbol undefined (i.e., implicitly defined).
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bool isUndefined() const {
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return !isDefined();
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}
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/// isAbsolute - Check if this is an absolute symbol.
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bool isAbsolute() const {
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return getSectionPtr() == AbsolutePseudoSection;
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}
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/// getSection - Get the section associated with a defined, non-absolute
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/// symbol.
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const MCSection &getSection() const {
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assert(isInSection() && "Invalid accessor!");
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return *getSectionPtr();
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}
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/// setSection - Mark the symbol as defined in the section \p S.
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void setSection(const MCSection &S) {
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assert(!isVariable() && "Cannot set section of variable");
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Section = &S;
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}
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/// setUndefined - Mark the symbol as undefined.
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void setUndefined() {
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Section = nullptr;
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}
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/// @}
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/// \name Variable Symbols
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/// @{
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/// isVariable - Check if this is a variable symbol.
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bool isVariable() const {
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return Value != nullptr;
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}
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/// getVariableValue() - Get the value for variable symbols.
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const MCExpr *getVariableValue() const {
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assert(isVariable() && "Invalid accessor!");
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IsUsed = true;
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return Value;
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}
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void setVariableValue(const MCExpr *Value);
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/// @}
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/// print - Print the value to the stream \p OS.
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void print(raw_ostream &OS) const;
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/// dump - Print the value to stderr.
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void dump() const;
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};
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inline raw_ostream &operator<<(raw_ostream &OS, const MCSymbol &Sym) {
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Sym.print(OS);
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return OS;
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MCSymbol(const MCSymbol &) = delete;
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void operator=(const MCSymbol &) = delete;
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const MCSection *getSectionPtr() const {
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if (Section || !Value)
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return Section;
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return Section = Value->FindAssociatedSection();
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}
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public:
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/// getName - Get the symbol name.
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StringRef getName() const { return Name; }
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/// \name Accessors
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/// @{
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/// isTemporary - Check if this is an assembler temporary symbol.
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bool isTemporary() const { return IsTemporary; }
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/// isUsed - Check if this is used.
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bool isUsed() const { return IsUsed; }
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void setUsed(bool Value) const { IsUsed = Value; }
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/// \brief Check if this symbol is redefinable.
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bool isRedefinable() const { return IsRedefinable; }
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/// \brief Mark this symbol as redefinable.
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void setRedefinable(bool Value) { IsRedefinable = Value; }
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/// \brief Prepare this symbol to be redefined.
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void redefineIfPossible() {
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if (IsRedefinable) {
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Value = nullptr;
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Section = nullptr;
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IsRedefinable = false;
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}
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}
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/// @}
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/// \name Associated Sections
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/// @{
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/// isDefined - Check if this symbol is defined (i.e., it has an address).
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///
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/// Defined symbols are either absolute or in some section.
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bool isDefined() const { return getSectionPtr() != nullptr; }
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/// isInSection - Check if this symbol is defined in some section (i.e., it
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/// is defined but not absolute).
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bool isInSection() const { return isDefined() && !isAbsolute(); }
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/// isUndefined - Check if this symbol undefined (i.e., implicitly defined).
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bool isUndefined() const { return !isDefined(); }
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/// isAbsolute - Check if this is an absolute symbol.
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bool isAbsolute() const { return getSectionPtr() == AbsolutePseudoSection; }
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/// getSection - Get the section associated with a defined, non-absolute
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/// symbol.
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const MCSection &getSection() const {
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assert(isInSection() && "Invalid accessor!");
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return *getSectionPtr();
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}
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/// setSection - Mark the symbol as defined in the section \p S.
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void setSection(const MCSection &S) {
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assert(!isVariable() && "Cannot set section of variable");
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Section = &S;
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}
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/// setUndefined - Mark the symbol as undefined.
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void setUndefined() { Section = nullptr; }
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/// @}
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/// \name Variable Symbols
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/// @{
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/// isVariable - Check if this is a variable symbol.
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bool isVariable() const { return Value != nullptr; }
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/// getVariableValue() - Get the value for variable symbols.
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const MCExpr *getVariableValue() const {
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assert(isVariable() && "Invalid accessor!");
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IsUsed = true;
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return Value;
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}
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void setVariableValue(const MCExpr *Value);
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/// @}
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/// print - Print the value to the stream \p OS.
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void print(raw_ostream &OS) const;
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/// dump - Print the value to stderr.
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void dump() const;
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};
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inline raw_ostream &operator<<(raw_ostream &OS, const MCSymbol &Sym) {
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Sym.print(OS);
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return OS;
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}
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} // end namespace llvm
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#endif
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