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Properly encapsulate additional methods and data from AsmParser.
This finally allows AsmParser to no longer list GenericAsmParser as a friend. All member vars directly accessed by GenericAsmParser have been properly encapsulated and exposed through the MCAsmParser interface. This reduces the coupling between AsmParser and GenericAsmParser. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172490 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Bendersky
parent
e673b54bdd
commit
c0c67b03b0
@ -11,6 +11,7 @@
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#define LLVM_MC_MCPARSER_MCASMPARSER_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/MC/MCParser/AsmLexer.h"
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#include "llvm/Support/DataTypes.h"
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#include <vector>
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@ -43,8 +44,24 @@ public:
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};
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/// \brief Helper types for tracking macro definitions.
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typedef std::vector<AsmToken> MCAsmMacroArgument;
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typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments;
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typedef std::pair<StringRef, MCAsmMacroArgument> MCAsmMacroParameter;
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typedef std::vector<MCAsmMacroParameter> MCAsmMacroParameters;
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struct MCAsmMacro {
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StringRef Name;
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StringRef Body;
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MCAsmMacroParameters Parameters;
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public:
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MCAsmMacro(StringRef N, StringRef B, const MCAsmMacroParameters &P) :
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Name(N), Body(B), Parameters(P) {}
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MCAsmMacro(const MCAsmMacro& Other)
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: Name(Other.Name), Body(Other.Body), Parameters(Other.Parameters) {}
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};
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/// MCAsmParser - Generic assembler parser interface, for use by target specific
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/// assembly parsers.
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@ -141,10 +158,35 @@ public:
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/// recovery.
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virtual void EatToEndOfStatement() = 0;
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/// Control a flag in the parser that enables or disables macros.
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/// \brief Are macros enabled in the parser?
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virtual bool MacrosEnabled() = 0;
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/// \brief Control a flag in the parser that enables or disables macros.
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virtual void SetMacrosEnabled(bool flag) = 0;
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/// \brief Lookup a previously defined macro.
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/// \param Name Macro name.
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/// \returns Pointer to macro. NULL if no such macro was defined.
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virtual const MCAsmMacro* LookupMacro(StringRef Name) = 0;
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/// \brief Define a new macro with the given name and information.
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virtual void DefineMacro(StringRef Name, const MCAsmMacro& Macro) = 0;
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/// \brief Undefine a macro. If no such macro was defined, it's a no-op.
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virtual void UndefineMacro(StringRef Name) = 0;
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/// \brief Are we inside a macro instantiation?
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virtual bool InsideMacroInstantiation() = 0;
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/// \brief Handle entry to macro instantiation.
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///
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/// \param M The macro.
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/// \param NameLoc Instantiation location.
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virtual bool HandleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) = 0;
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/// \brief Handle exit from macro instantiation.
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virtual void HandleMacroExit() = 0;
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/// ParseMacroArgument - Extract AsmTokens for a macro argument. If the
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/// argument delimiter is initially unknown, set it to AsmToken::Eof. It will
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/// be set to the correct delimiter by the method.
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@ -50,26 +50,12 @@ MCAsmParserSemaCallback::~MCAsmParserSemaCallback() {}
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namespace {
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/// \brief Helper class for tracking macro definitions.
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typedef std::vector<MCAsmMacroArgument> MacroArguments;
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typedef std::pair<StringRef, MCAsmMacroArgument> MacroParameter;
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typedef std::vector<MacroParameter> MacroParameters;
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struct Macro {
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StringRef Name;
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StringRef Body;
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MacroParameters Parameters;
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public:
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Macro(StringRef N, StringRef B, const MacroParameters &P) :
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Name(N), Body(B), Parameters(P) {}
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};
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/// \brief Helper class for storing information about an active macro
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/// instantiation.
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struct MacroInstantiation {
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/// The macro being instantiated.
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const Macro *TheMacro;
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const MCAsmMacro *TheMacro;
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/// The macro instantiation with substitutions.
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MemoryBuffer *Instantiation;
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@ -84,7 +70,7 @@ struct MacroInstantiation {
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SMLoc ExitLoc;
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public:
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MacroInstantiation(const Macro *M, SMLoc IL, int EB, SMLoc EL,
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MacroInstantiation(const MCAsmMacro *M, SMLoc IL, int EB, SMLoc EL,
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MemoryBuffer *I);
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};
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@ -115,8 +101,6 @@ struct ParseStatementInfo {
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/// \brief The concrete assembly parser instance.
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class AsmParser : public MCAsmParser {
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friend class GenericAsmParser;
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AsmParser(const AsmParser &) LLVM_DELETED_FUNCTION;
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void operator=(const AsmParser &) LLVM_DELETED_FUNCTION;
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private:
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@ -144,7 +128,7 @@ private:
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StringMap<std::pair<MCAsmParserExtension*, DirectiveHandler> > DirectiveMap;
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/// MacroMap - Map of currently defined macros.
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StringMap<Macro*> MacroMap;
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StringMap<MCAsmMacro*> MacroMap;
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/// ActiveMacros - Stack of active macro instantiations.
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std::vector<MacroInstantiation*> ActiveMacros;
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@ -225,6 +209,9 @@ public:
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virtual bool ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc);
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virtual bool ParseAbsoluteExpression(int64_t &Res);
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bool ParseMacroArgument(MCAsmMacroArgument &MA,
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AsmToken::TokenKind &ArgumentDelimiter);
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/// ParseIdentifier - Parse an identifier or string (as a quoted identifier)
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/// and set \p Res to the identifier contents.
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virtual bool ParseIdentifier(StringRef &Res);
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@ -233,6 +220,14 @@ public:
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virtual bool MacrosEnabled() {return MacrosEnabledFlag;}
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virtual void SetMacrosEnabled(bool flag) {MacrosEnabledFlag = flag;}
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virtual const MCAsmMacro* LookupMacro(StringRef Name);
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virtual void DefineMacro(StringRef Name, const MCAsmMacro& Macro);
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virtual void UndefineMacro(StringRef Name);
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virtual bool InsideMacroInstantiation() {return !ActiveMacros.empty();}
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virtual bool HandleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc);
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void HandleMacroExit();
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virtual void CheckForValidSection();
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/// }
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@ -242,12 +237,10 @@ private:
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void EatToEndOfLine();
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bool ParseCppHashLineFilenameComment(const SMLoc &L);
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bool HandleMacroEntry(StringRef Name, SMLoc NameLoc, const Macro *M);
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bool expandMacro(raw_svector_ostream &OS, StringRef Body,
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const MacroParameters &Parameters,
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const MacroArguments &A,
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const MCAsmMacroParameters &Parameters,
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const MCAsmMacroArguments &A,
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const SMLoc &L);
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void HandleMacroExit();
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void PrintMacroInstantiations();
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void PrintMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
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@ -270,9 +263,7 @@ private:
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/// location.
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void JumpToLoc(SMLoc Loc, int InBuffer=-1);
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bool ParseMacroArgument(MCAsmMacroArgument &MA,
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AsmToken::TokenKind &ArgumentDelimiter);
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bool ParseMacroArguments(const Macro *M, MacroArguments &A);
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bool ParseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A);
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/// \brief Parse up to the end of statement and a return the contents from the
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/// current token until the end of the statement; the current token on exit
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@ -359,8 +350,8 @@ private:
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MCSymbolRefExpr::VariantKind Variant);
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// Macro-like directives
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Macro *ParseMacroLikeBody(SMLoc DirectiveLoc);
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void InstantiateMacroLikeBody(Macro *M, SMLoc DirectiveLoc,
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MCAsmMacro *ParseMacroLikeBody(SMLoc DirectiveLoc);
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void InstantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
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raw_svector_ostream &OS);
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bool ParseDirectiveRept(SMLoc DirectiveLoc); // ".rept"
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bool ParseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
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@ -540,7 +531,7 @@ AsmParser::~AsmParser() {
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assert(ActiveMacros.empty() && "Unexpected active macro instantiation!");
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// Destroy any macros.
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for (StringMap<Macro*>::iterator it = MacroMap.begin(),
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for (StringMap<MCAsmMacro*>::iterator it = MacroMap.begin(),
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ie = MacroMap.end(); it != ie; ++it)
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delete it->getValue();
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@ -1278,8 +1269,9 @@ bool AsmParser::ParseStatement(ParseStatementInfo &Info) {
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// If macros are enabled, check to see if this is a macro instantiation.
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if (MacrosEnabled())
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if (const Macro *M = MacroMap.lookup(IDVal))
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return HandleMacroEntry(IDVal, IDLoc, M);
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if (const MCAsmMacro *M = LookupMacro(IDVal)) {
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return HandleMacroEntry(M, IDLoc);
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}
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// Otherwise, we have a normal instruction or directive.
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if (IDVal[0] == '.' && IDVal != ".") {
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@ -1590,8 +1582,8 @@ static bool isIdentifierChar(char c) {
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}
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bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
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const MacroParameters &Parameters,
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const MacroArguments &A,
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const MCAsmMacroParameters &Parameters,
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const MCAsmMacroArguments &A,
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const SMLoc &L) {
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unsigned NParameters = Parameters.size();
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if (NParameters != 0 && NParameters != A.size())
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@ -1690,7 +1682,7 @@ bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
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return false;
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}
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MacroInstantiation::MacroInstantiation(const Macro *M, SMLoc IL,
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MacroInstantiation::MacroInstantiation(const MCAsmMacro *M, SMLoc IL,
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int EB, SMLoc EL,
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MemoryBuffer *I)
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: TheMacro(M), Instantiation(I), InstantiationLoc(IL), ExitBuffer(EB),
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@ -1807,7 +1799,7 @@ bool AsmParser::ParseMacroArgument(MCAsmMacroArgument &MA,
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}
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// Parse the macro instantiation arguments.
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bool AsmParser::ParseMacroArguments(const Macro *M, MacroArguments &A) {
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bool AsmParser::ParseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A) {
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const unsigned NParameters = M ? M->Parameters.size() : 0;
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// Argument delimiter is initially unknown. It will be set by
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// ParseMacroArgument()
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@ -1851,14 +1843,30 @@ bool AsmParser::ParseMacroArguments(const Macro *M, MacroArguments &A) {
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return TokError("Too many arguments");
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}
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bool AsmParser::HandleMacroEntry(StringRef Name, SMLoc NameLoc,
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const Macro *M) {
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const MCAsmMacro* AsmParser::LookupMacro(StringRef Name) {
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StringMap<MCAsmMacro*>::iterator I = MacroMap.find(Name);
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return (I == MacroMap.end()) ? NULL : I->getValue();
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}
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void AsmParser::DefineMacro(StringRef Name, const MCAsmMacro& Macro) {
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MacroMap[Name] = new MCAsmMacro(Macro);
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}
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void AsmParser::UndefineMacro(StringRef Name) {
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StringMap<MCAsmMacro*>::iterator I = MacroMap.find(Name);
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if (I != MacroMap.end()) {
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delete I->getValue();
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MacroMap.erase(I);
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}
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}
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bool AsmParser::HandleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
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// Arbitrarily limit macro nesting depth, to match 'as'. We can eliminate
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// this, although we should protect against infinite loops.
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if (ActiveMacros.size() == 20)
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return TokError("macros cannot be nested more than 20 levels deep");
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MacroArguments A;
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MCAsmMacroArguments A;
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if (ParseMacroArguments(M, A))
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return true;
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@ -1877,7 +1885,7 @@ bool AsmParser::HandleMacroEntry(StringRef Name, SMLoc NameLoc,
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if (expandMacro(OS, Body, M->Parameters, A, getTok().getLoc()))
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return true;
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// We include the .endmacro in the buffer as our queue to exit the macro
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// We include the .endmacro in the buffer as our cue to exit the macro
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// instantiation.
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OS << ".endmacro\n";
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@ -3498,13 +3506,13 @@ bool GenericAsmParser::ParseDirectiveMacro(StringRef Directive,
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if (getParser().ParseIdentifier(Name))
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return TokError("expected identifier in '.macro' directive");
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MacroParameters Parameters;
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MCAsmMacroParameters Parameters;
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// Argument delimiter is initially unknown. It will be set by
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// ParseMacroArgument()
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AsmToken::TokenKind ArgumentDelimiter = AsmToken::Eof;
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if (getLexer().isNot(AsmToken::EndOfStatement)) {
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for (;;) {
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MacroParameter Parameter;
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MCAsmMacroParameter Parameter;
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if (getParser().ParseIdentifier(Parameter.first))
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return TokError("expected identifier in '.macro' directive");
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@ -3550,14 +3558,14 @@ bool GenericAsmParser::ParseDirectiveMacro(StringRef Directive,
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getParser().EatToEndOfStatement();
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}
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if (getParser().MacroMap.lookup(Name)) {
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if (getParser().LookupMacro(Name)) {
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return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
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}
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const char *BodyStart = StartToken.getLoc().getPointer();
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const char *BodyEnd = EndToken.getLoc().getPointer();
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StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
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getParser().MacroMap[Name] = new Macro(Name, Body, Parameters);
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getParser().DefineMacro(Name, MCAsmMacro(Name, Body, Parameters));
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return false;
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}
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@ -3571,7 +3579,7 @@ bool GenericAsmParser::ParseDirectiveEndMacro(StringRef Directive,
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// If we are inside a macro instantiation, terminate the current
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// instantiation.
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if (!getParser().ActiveMacros.empty()) {
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if (getParser().InsideMacroInstantiation()) {
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getParser().HandleMacroExit();
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return false;
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}
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@ -3593,13 +3601,10 @@ bool GenericAsmParser::ParseDirectivePurgeMacro(StringRef Directive,
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if (getLexer().isNot(AsmToken::EndOfStatement))
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return TokError("unexpected token in '.purgem' directive");
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StringMap<Macro*>::iterator I = getParser().MacroMap.find(Name);
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if (I == getParser().MacroMap.end())
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if (!getParser().LookupMacro(Name))
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return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
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// Undefine the macro.
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delete I->getValue();
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getParser().MacroMap.erase(I);
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getParser().UndefineMacro(Name);
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return false;
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}
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@ -3622,7 +3627,7 @@ bool GenericAsmParser::ParseDirectiveLEB128(StringRef DirName, SMLoc) {
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return false;
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}
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Macro *AsmParser::ParseMacroLikeBody(SMLoc DirectiveLoc) {
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MCAsmMacro *AsmParser::ParseMacroLikeBody(SMLoc DirectiveLoc) {
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AsmToken EndToken, StartToken = getTok();
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unsigned NestLevel = 0;
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@ -3663,11 +3668,11 @@ Macro *AsmParser::ParseMacroLikeBody(SMLoc DirectiveLoc) {
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// We Are Anonymous.
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StringRef Name;
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MacroParameters Parameters;
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return new Macro(Name, Body, Parameters);
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MCAsmMacroParameters Parameters;
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return new MCAsmMacro(Name, Body, Parameters);
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}
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void AsmParser::InstantiateMacroLikeBody(Macro *M, SMLoc DirectiveLoc,
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void AsmParser::InstantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
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raw_svector_ostream &OS) {
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OS << ".endr\n";
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@ -3703,15 +3708,15 @@ bool AsmParser::ParseDirectiveRept(SMLoc DirectiveLoc) {
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Lex();
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// Lex the rept definition.
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Macro *M = ParseMacroLikeBody(DirectiveLoc);
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MCAsmMacro *M = ParseMacroLikeBody(DirectiveLoc);
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if (!M)
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return true;
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// Macro instantiation is lexical, unfortunately. We construct a new buffer
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// to hold the macro body with substitutions.
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SmallString<256> Buf;
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MacroParameters Parameters;
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MacroArguments A;
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MCAsmMacroParameters Parameters;
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MCAsmMacroArguments A;
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raw_svector_ostream OS(Buf);
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while (Count--) {
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if (expandMacro(OS, M->Body, Parameters, A, getTok().getLoc()))
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@ -3725,8 +3730,8 @@ bool AsmParser::ParseDirectiveRept(SMLoc DirectiveLoc) {
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/// ParseDirectiveIrp
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/// ::= .irp symbol,values
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bool AsmParser::ParseDirectiveIrp(SMLoc DirectiveLoc) {
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MacroParameters Parameters;
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MacroParameter Parameter;
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MCAsmMacroParameters Parameters;
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MCAsmMacroParameter Parameter;
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if (ParseIdentifier(Parameter.first))
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return TokError("expected identifier in '.irp' directive");
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@ -3738,7 +3743,7 @@ bool AsmParser::ParseDirectiveIrp(SMLoc DirectiveLoc) {
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Lex();
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MacroArguments A;
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MCAsmMacroArguments A;
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if (ParseMacroArguments(0, A))
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return true;
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@ -3746,7 +3751,7 @@ bool AsmParser::ParseDirectiveIrp(SMLoc DirectiveLoc) {
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Lex();
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// Lex the irp definition.
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Macro *M = ParseMacroLikeBody(DirectiveLoc);
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MCAsmMacro *M = ParseMacroLikeBody(DirectiveLoc);
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if (!M)
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return true;
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@ -3755,8 +3760,8 @@ bool AsmParser::ParseDirectiveIrp(SMLoc DirectiveLoc) {
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SmallString<256> Buf;
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raw_svector_ostream OS(Buf);
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for (MacroArguments::iterator i = A.begin(), e = A.end(); i != e; ++i) {
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MacroArguments Args;
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for (MCAsmMacroArguments::iterator i = A.begin(), e = A.end(); i != e; ++i) {
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MCAsmMacroArguments Args;
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Args.push_back(*i);
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if (expandMacro(OS, M->Body, Parameters, Args, getTok().getLoc()))
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@ -3771,8 +3776,8 @@ bool AsmParser::ParseDirectiveIrp(SMLoc DirectiveLoc) {
|
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/// ParseDirectiveIrpc
|
||||
/// ::= .irpc symbol,values
|
||||
bool AsmParser::ParseDirectiveIrpc(SMLoc DirectiveLoc) {
|
||||
MacroParameters Parameters;
|
||||
MacroParameter Parameter;
|
||||
MCAsmMacroParameters Parameters;
|
||||
MCAsmMacroParameter Parameter;
|
||||
|
||||
if (ParseIdentifier(Parameter.first))
|
||||
return TokError("expected identifier in '.irpc' directive");
|
||||
@ -3784,7 +3789,7 @@ bool AsmParser::ParseDirectiveIrpc(SMLoc DirectiveLoc) {
|
||||
|
||||
Lex();
|
||||
|
||||
MacroArguments A;
|
||||
MCAsmMacroArguments A;
|
||||
if (ParseMacroArguments(0, A))
|
||||
return true;
|
||||
|
||||
@ -3795,7 +3800,7 @@ bool AsmParser::ParseDirectiveIrpc(SMLoc DirectiveLoc) {
|
||||
Lex();
|
||||
|
||||
// Lex the irpc definition.
|
||||
Macro *M = ParseMacroLikeBody(DirectiveLoc);
|
||||
MCAsmMacro *M = ParseMacroLikeBody(DirectiveLoc);
|
||||
if (!M)
|
||||
return true;
|
||||
|
||||
@ -3810,7 +3815,7 @@ bool AsmParser::ParseDirectiveIrpc(SMLoc DirectiveLoc) {
|
||||
MCAsmMacroArgument Arg;
|
||||
Arg.push_back(AsmToken(AsmToken::Identifier, Values.slice(I, I+1)));
|
||||
|
||||
MacroArguments Args;
|
||||
MCAsmMacroArguments Args;
|
||||
Args.push_back(Arg);
|
||||
|
||||
if (expandMacro(OS, M->Body, Parameters, Args, getTok().getLoc()))
|
||||
|
||||
Loading…
Reference in New Issue
Block a user