X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FInlineAsm.h;h=701134d526aaa1456c65ceb35dc562b0ab6eebc5;hb=b09c146b116359616f6cbd4c8b3328607e00ff42;hp=2ac0fcab7960810cf07436374bb8736c1713931a;hpb=bf48a9b6db111fc14a8faef1adefbce5d807aaef;p=oota-llvm.git diff --git a/include/llvm/InlineAsm.h b/include/llvm/InlineAsm.h index 2ac0fcab796..701134d526a 100644 --- a/include/llvm/InlineAsm.h +++ b/include/llvm/InlineAsm.h @@ -16,6 +16,7 @@ #ifndef LLVM_INLINEASM_H #define LLVM_INLINEASM_H +#include "llvm/ADT/StringRef.h" #include "llvm/Value.h" #include @@ -25,26 +26,35 @@ class PointerType; class FunctionType; class Module; struct InlineAsmKeyType; -template +template class ConstantUniqueMap; template struct ConstantCreator; class InlineAsm : public Value { +public: + enum AsmDialect { + AD_ATT, + AD_Intel + }; + +private: friend struct ConstantCreator; - friend class ConstantUniqueMap; + friend class ConstantUniqueMap; - InlineAsm(const InlineAsm &); // do not implement - void operator=(const InlineAsm&); // do not implement + InlineAsm(const InlineAsm &) LLVM_DELETED_FUNCTION; + void operator=(const InlineAsm&) LLVM_DELETED_FUNCTION; std::string AsmString, Constraints; bool HasSideEffects; bool IsAlignStack; - - InlineAsm(const PointerType *Ty, const std::string &AsmString, + AsmDialect Dialect; + + InlineAsm(PointerType *Ty, const std::string &AsmString, const std::string &Constraints, bool hasSideEffects, - bool isAlignStack); + bool isAlignStack, AsmDialect asmDialect); virtual ~InlineAsm(); /// When the ConstantUniqueMap merges two types and makes two InlineAsms @@ -54,22 +64,24 @@ public: /// InlineAsm::get - Return the specified uniqued inline asm string. /// - static InlineAsm *get(const FunctionType *Ty, StringRef AsmString, + static InlineAsm *get(FunctionType *Ty, StringRef AsmString, StringRef Constraints, bool hasSideEffects, - bool isAlignStack = false); + bool isAlignStack = false, + AsmDialect asmDialect = AD_ATT); bool hasSideEffects() const { return HasSideEffects; } bool isAlignStack() const { return IsAlignStack; } - + AsmDialect getDialect() const { return Dialect; } + /// getType - InlineAsm's are always pointers. /// - const PointerType *getType() const { - return reinterpret_cast(Value::getType()); + PointerType *getType() const { + return reinterpret_cast(Value::getType()); } /// getFunctionType - InlineAsm's are always pointers to functions. /// - const FunctionType *getFunctionType() const; + FunctionType *getFunctionType() const; const std::string &getAsmString() const { return AsmString; } const std::string &getConstraintString() const { return Constraints; } @@ -78,7 +90,7 @@ public: /// the specified constraint string is legal for the type. This returns true /// if legal, false if not. /// - static bool Verify(const FunctionType *Ty, StringRef Constraints); + static bool Verify(FunctionType *Ty, StringRef Constraints); // Constraint String Parsing enum ConstraintPrefix { @@ -87,6 +99,25 @@ public: isClobber // '~x' }; + typedef std::vector ConstraintCodeVector; + + struct SubConstraintInfo { + /// MatchingInput - If this is not -1, this is an output constraint where an + /// input constraint is required to match it (e.g. "0"). The value is the + /// constraint number that matches this one (for example, if this is + /// constraint #0 and constraint #4 has the value "0", this will be 4). + signed char MatchingInput; + /// Code - The constraint code, either the register name (in braces) or the + /// constraint letter/number. + ConstraintCodeVector Codes; + /// Default constructor. + SubConstraintInfo() : MatchingInput(-1) {} + }; + + typedef std::vector SubConstraintInfoVector; + struct ConstraintInfo; + typedef std::vector ConstraintInfoVector; + struct ConstraintInfo { /// Type - The basic type of the constraint: input/output/clobber /// @@ -118,34 +149,130 @@ public: /// Code - The constraint code, either the register name (in braces) or the /// constraint letter/number. - std::vector Codes; + ConstraintCodeVector Codes; + + /// isMultipleAlternative - '|': has multiple-alternative constraints. + bool isMultipleAlternative; + + /// multipleAlternatives - If there are multiple alternative constraints, + /// this array will contain them. Otherwise it will be empty. + SubConstraintInfoVector multipleAlternatives; + + /// The currently selected alternative constraint index. + unsigned currentAlternativeIndex; + + ///Default constructor. + ConstraintInfo(); + + /// Copy constructor. + ConstraintInfo(const ConstraintInfo &other); /// Parse - Analyze the specified string (e.g. "=*&{eax}") and fill in the /// fields in this structure. If the constraint string is not understood, /// return true, otherwise return false. - bool Parse(StringRef Str, - std::vector &ConstraintsSoFar); + bool Parse(StringRef Str, ConstraintInfoVector &ConstraintsSoFar); + + /// selectAlternative - Point this constraint to the alternative constraint + /// indicated by the index. + void selectAlternative(unsigned index); }; /// ParseConstraints - Split up the constraint string into the specific /// constraints and their prefixes. If this returns an empty vector, and if /// the constraint string itself isn't empty, there was an error parsing. - static std::vector - ParseConstraints(StringRef ConstraintString); + static ConstraintInfoVector ParseConstraints(StringRef ConstraintString); /// ParseConstraints - Parse the constraints of this inlineasm object, /// returning them the same way that ParseConstraints(str) does. - std::vector - ParseConstraints() const { + ConstraintInfoVector ParseConstraints() const { return ParseConstraints(Constraints); } // Methods for support type inquiry through isa, cast, and dyn_cast: - static inline bool classof(const InlineAsm *) { return true; } static inline bool classof(const Value *V) { return V->getValueID() == Value::InlineAsmVal; } + + // These are helper methods for dealing with flags in the INLINEASM SDNode + // in the backend. + + enum { + // Fixed operands on an INLINEASM SDNode. + Op_InputChain = 0, + Op_AsmString = 1, + Op_MDNode = 2, + Op_ExtraInfo = 3, // HasSideEffects, IsAlignStack, AsmDialect. + Op_FirstOperand = 4, + + // Fixed operands on an INLINEASM MachineInstr. + MIOp_AsmString = 0, + MIOp_ExtraInfo = 1, // HasSideEffects, IsAlignStack, AsmDialect. + MIOp_FirstOperand = 2, + + // Interpretation of the MIOp_ExtraInfo bit field. + Extra_HasSideEffects = 1, + Extra_IsAlignStack = 2, + Extra_AsmDialect = 4, + Extra_MayLoad = 8, + Extra_MayStore = 16, + + // Inline asm operands map to multiple SDNode / MachineInstr operands. + // The first operand is an immediate describing the asm operand, the low + // bits is the kind: + Kind_RegUse = 1, // Input register, "r". + Kind_RegDef = 2, // Output register, "=r". + Kind_RegDefEarlyClobber = 3, // Early-clobber output register, "=&r". + Kind_Clobber = 4, // Clobbered register, "~r". + Kind_Imm = 5, // Immediate. + Kind_Mem = 6, // Memory operand, "m". + + Flag_MatchingOperand = 0x80000000 + }; + + static unsigned getFlagWord(unsigned Kind, unsigned NumOps) { + assert(((NumOps << 3) & ~0xffff) == 0 && "Too many inline asm operands!"); + assert(Kind >= Kind_RegUse && Kind <= Kind_Mem && "Invalid Kind"); + return Kind | (NumOps << 3); + } + + /// getFlagWordForMatchingOp - Augment an existing flag word returned by + /// getFlagWord with information indicating that this input operand is tied + /// to a previous output operand. + static unsigned getFlagWordForMatchingOp(unsigned InputFlag, + unsigned MatchedOperandNo) { + assert(MatchedOperandNo <= 0x7fff && "Too big matched operand"); + assert((InputFlag & ~0xffff) == 0 && "High bits already contain data"); + return InputFlag | Flag_MatchingOperand | (MatchedOperandNo << 16); + } + + /// getFlagWordForRegClass - Augment an existing flag word returned by + /// getFlagWord with the required register class for the following register + /// operands. + /// A tied use operand cannot have a register class, use the register class + /// from the def operand instead. + static unsigned getFlagWordForRegClass(unsigned InputFlag, unsigned RC) { + // Store RC + 1, reserve the value 0 to mean 'no register class'. + ++RC; + assert(RC <= 0x7fff && "Too large register class ID"); + assert((InputFlag & ~0xffff) == 0 && "High bits already contain data"); + return InputFlag | (RC << 16); + } + + static unsigned getKind(unsigned Flags) { + return Flags & 7; + } + + static bool isRegDefKind(unsigned Flag){ return getKind(Flag) == Kind_RegDef;} + static bool isImmKind(unsigned Flag) { return getKind(Flag) == Kind_Imm; } + static bool isMemKind(unsigned Flag) { return getKind(Flag) == Kind_Mem; } + static bool isRegDefEarlyClobberKind(unsigned Flag) { + return getKind(Flag) == Kind_RegDefEarlyClobber; + } + static bool isClobberKind(unsigned Flag) { + return getKind(Flag) == Kind_Clobber; + } + /// getNumOperandRegisters - Extract the number of registers field from the /// inline asm operand flag. static unsigned getNumOperandRegisters(unsigned Flag) { @@ -155,12 +282,25 @@ public: /// isUseOperandTiedToDef - Return true if the flag of the inline asm /// operand indicates it is an use operand that's matched to a def operand. static bool isUseOperandTiedToDef(unsigned Flag, unsigned &Idx) { - if ((Flag & 0x80000000) == 0) + if ((Flag & Flag_MatchingOperand) == 0) return false; - Idx = (Flag & ~0x80000000) >> 16; + Idx = (Flag & ~Flag_MatchingOperand) >> 16; return true; } + /// hasRegClassConstraint - Returns true if the flag contains a register + /// class constraint. Sets RC to the register class ID. + static bool hasRegClassConstraint(unsigned Flag, unsigned &RC) { + if (Flag & Flag_MatchingOperand) + return false; + unsigned High = Flag >> 16; + // getFlagWordForRegClass() uses 0 to mean no register class, and otherwise + // stores RC + 1. + if (!High) + return false; + RC = High - 1; + return true; + } };