X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FInlineAsm.h;h=fe8a714dd9244c86ff5e359854388ff4a539c68f;hb=1b84cce77f8bccc905b4800927ce9016f76c1c40;hp=4490ce5a546cd7a8b47654c882355a857e574367;hpb=f451cb870efcf9e0302d25ed05f4cac6bb494e42;p=oota-llvm.git diff --git a/include/llvm/InlineAsm.h b/include/llvm/InlineAsm.h index 4490ce5a546..fe8a714dd92 100644 --- a/include/llvm/InlineAsm.h +++ b/include/llvm/InlineAsm.h @@ -24,8 +24,18 @@ namespace llvm { class PointerType; class FunctionType; class Module; +struct InlineAsmKeyType; +template +class ConstantUniqueMap; +template +struct ConstantCreator; class InlineAsm : public Value { + friend struct ConstantCreator; + friend class ConstantUniqueMap; + InlineAsm(const InlineAsm &); // do not implement void operator=(const InlineAsm&); // do not implement @@ -33,15 +43,19 @@ class InlineAsm : public Value { bool HasSideEffects; bool IsAlignStack; - InlineAsm(const FunctionType *Ty, StringRef AsmString, - StringRef Constraints, bool hasSideEffects, - bool isAlignStack = false); + InlineAsm(PointerType *Ty, const std::string &AsmString, + const std::string &Constraints, bool hasSideEffects, + bool isAlignStack); virtual ~InlineAsm(); + + /// When the ConstantUniqueMap merges two types and makes two InlineAsms + /// identical, it destroys one of them with this method. + void destroyConstant(); 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); @@ -50,13 +64,13 @@ public: /// 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; } @@ -65,7 +79,7 @@ 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 { @@ -74,6 +88,25 @@ 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 /// @@ -105,25 +138,42 @@ 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); } @@ -133,6 +183,67 @@ public: 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 + Op_FirstOperand = 4, + + // Fixed operands on an INLINEASM MachineInstr. + MIOp_AsmString = 0, + MIOp_ExtraInfo = 1, // HasSideEffects, IsAlignStack + MIOp_FirstOperand = 2, + + // Interpretation of the MIOp_ExtraInfo bit field. + Extra_HasSideEffects = 1, + Extra_IsAlignStack = 2, + + // 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!"); + 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) { + return InputFlag | Flag_MatchingOperand | (MatchedOperandNo << 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) { @@ -142,9 +253,9 @@ 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; }