X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FInlineAsm.h;h=9343834325546c2ebead4f09dbafdb23f10c90e2;hb=44ab89eb376af838d1123293a79975aede501464;hp=bc55031b0d42e40cee5ae8ae8adc69f95ec35342;hpb=4360298d2bf3c1ba8595a415cfa235df0bc76335;p=oota-llvm.git diff --git a/include/llvm/InlineAsm.h b/include/llvm/InlineAsm.h index bc55031b0d4..93438343255 100644 --- a/include/llvm/InlineAsm.h +++ b/include/llvm/InlineAsm.h @@ -16,37 +16,50 @@ #ifndef LLVM_INLINEASM_H #define LLVM_INLINEASM_H +#include "llvm/ADT/SmallVector.h" #include "llvm/Value.h" -#include 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 std::string AsmString, Constraints; bool HasSideEffects; - bool IsMsAsm; + bool IsAlignStack; - InlineAsm(const FunctionType *Ty, const StringRef &AsmString, - const StringRef &Constraints, bool hasSideEffects, - bool isMsAsm = false); + InlineAsm(const 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 the specified uniqued inline asm string. + /// InlineAsm::get - Return the specified uniqued inline asm string. /// - static InlineAsm *get(const FunctionType *Ty, const StringRef &AsmString, - const StringRef &Constraints, bool hasSideEffects, - bool isMsAsm = false); + static InlineAsm *get(const FunctionType *Ty, StringRef AsmString, + StringRef Constraints, bool hasSideEffects, + bool isAlignStack = false); bool hasSideEffects() const { return HasSideEffects; } - bool isMsAsm() const { return IsMsAsm; } + bool isAlignStack() const { return IsAlignStack; } /// getType - InlineAsm's are always pointers. /// @@ -65,7 +78,7 @@ public: /// the specified constraint string is legal for the type. This returns true /// if legal, false if not. /// - static bool Verify(const FunctionType *Ty, const StringRef &Constraints); + static bool Verify(const FunctionType *Ty, StringRef Constraints); // Constraint String Parsing enum ConstraintPrefix { @@ -74,6 +87,25 @@ public: isClobber // '~x' }; + typedef SmallVector 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 SmallVector SubConstraintInfoVector; + struct ConstraintInfo; + typedef SmallVector ConstraintInfoVector; + struct ConstraintInfo { /// Type - The basic type of the constraint: input/output/clobber /// @@ -105,25 +137,42 @@ 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(const 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(const 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 +182,50 @@ public: return V->getValueID() == Value::InlineAsmVal; } + + // These are helper methods for dealing with flags in the INLINEASM SDNode + // in the backend. + + enum { + Op_InputChain = 0, + Op_AsmString = 1, + Op_MDNode = 2, + Op_IsAlignStack = 3, + Op_FirstOperand = 4, + + Kind_RegUse = 1, + Kind_RegDef = 2, + Kind_Imm = 3, + Kind_Mem = 4, + Kind_RegDefEarlyClobber = 6, + + 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; + } + /// getNumOperandRegisters - Extract the number of registers field from the /// inline asm operand flag. static unsigned getNumOperandRegisters(unsigned Flag) { @@ -142,9 +235,9 @@ 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; }