//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Chris Lattner and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class represents the inline asm strings, which are Value*'s that are
-// used as the callee operand of call instructions.
+// used as the callee operand of call instructions. InlineAsm's are uniqued
+// like constants, and created via InlineAsm::get(...).
//
//===----------------------------------------------------------------------===//
#define LLVM_INLINEASM_H
#include "llvm/Value.h"
+#include <vector>
namespace llvm {
-class AssemblyAnnotationWriter;
class PointerType;
class FunctionType;
class Module;
-template<typename SC> struct ilist_traits;
-template<typename ValueSubClass, typename ItemParentClass, typename SymTabClass,
- typename SubClass> class SymbolTableListTraits;
class InlineAsm : public Value {
- friend class SymbolTableListTraits<InlineAsm, Module, Module,
- ilist_traits<InlineAsm> >;
InlineAsm(const InlineAsm &); // do not implement
void operator=(const InlineAsm&); // do not implement
- void setParent(Module *Parent);
- InlineAsm *Prev, *Next;
- void setNext(InlineAsm *N) { Next = N; }
- void setPrev(InlineAsm *N) { Prev = N; }
- InlineAsm *getNext() { return Next; }
- const InlineAsm *getNext() const { return Next; }
- InlineAsm *getPrev() { return Prev; }
- const InlineAsm *getPrev() const { return Prev; }
-
- Module *Parent;
std::string AsmString, Constraints;
- bool AsmHasSideEffects;
+ bool HasSideEffects;
+ bool IsAlignStack;
+
+ InlineAsm(const FunctionType *Ty, StringRef AsmString,
+ StringRef Constraints, bool hasSideEffects,
+ bool isAlignStack = false);
+ virtual ~InlineAsm();
public:
- InlineAsm(const FunctionType *Ty, const std::string &AsmString,
- const std::string &Constraints, bool hasSideEffects,
- const std::string &Name = "", Module *ParentModule = 0);
+
+ /// InlineAsm::get - Return the the specified uniqued inline asm string.
+ ///
+ static InlineAsm *get(const FunctionType *Ty, StringRef AsmString,
+ StringRef Constraints, bool hasSideEffects,
+ bool isAlignStack = false);
- bool getHasSideEffects() const { return AsmHasSideEffects; }
- void setSideEffects(bool X) { AsmHasSideEffects = X; }
+ bool hasSideEffects() const { return HasSideEffects; }
+ bool isAlignStack() const { return IsAlignStack; }
/// getType - InlineAsm's are always pointers.
///
/// getFunctionType - InlineAsm's are always pointers to functions.
///
const FunctionType *getFunctionType() const;
+
+ const std::string &getAsmString() const { return AsmString; }
+ const std::string &getConstraintString() const { return Constraints; }
- /// getParent - Get the module that this global value is contained inside
- /// of...
- Module *getParent() { return Parent; }
- const Module *getParent() const { return Parent; }
+ /// Verify - This static method can be used by the parser to check to see if
+ /// 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);
+ // Constraint String Parsing
+ enum ConstraintPrefix {
+ isInput, // 'x'
+ isOutput, // '=x'
+ isClobber // '~x'
+ };
- /// removeFromParent/eraseFromParent - Unlink and unlink/delete this object
- /// from the module it is embedded into.
- void removeFromParent();
- void eraseFromParent();
+ struct ConstraintInfo {
+ /// Type - The basic type of the constraint: input/output/clobber
+ ///
+ ConstraintPrefix Type;
+
+ /// isEarlyClobber - "&": output operand writes result before inputs are all
+ /// read. This is only ever set for an output operand.
+ bool isEarlyClobber;
+
+ /// 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;
+
+ /// hasMatchingInput - Return true if this is an output constraint that has
+ /// a matching input constraint.
+ bool hasMatchingInput() const { return MatchingInput != -1; }
+
+ /// isCommutative - This is set to true for a constraint that is commutative
+ /// with the next operand.
+ bool isCommutative;
+
+ /// isIndirect - True if this operand is an indirect operand. This means
+ /// that the address of the source or destination is present in the call
+ /// instruction, instead of it being returned or passed in explicitly. This
+ /// is represented with a '*' in the asm string.
+ bool isIndirect;
+
+ /// Code - The constraint code, either the register name (in braces) or the
+ /// constraint letter/number.
+ std::vector<std::string> Codes;
+
+ /// 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<InlineAsm::ConstraintInfo> &ConstraintsSoFar);
+ };
+
+ /// 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<ConstraintInfo>
+ ParseConstraints(StringRef ConstraintString);
+
+ /// ParseConstraints - Parse the constraints of this inlineasm object,
+ /// returning them the same way that ParseConstraints(str) does.
+ std::vector<ConstraintInfo>
+ ParseConstraints() const {
+ return ParseConstraints(Constraints);
+ }
- virtual void print(std::ostream &O) const { print(O, 0); }
- void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const;
-
// 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->getValueType() == Value::InlineAsmVal;
+ return V->getValueID() == Value::InlineAsmVal;
+ }
+
+ /// getNumOperandRegisters - Extract the number of registers field from the
+ /// inline asm operand flag.
+ static unsigned getNumOperandRegisters(unsigned Flag) {
+ return (Flag & 0xffff) >> 3;
}
+
+ /// 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)
+ return false;
+ Idx = (Flag & ~0x80000000) >> 16;
+ return true;
+ }
+
+
};
} // End llvm namespace
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