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507fdbc0e8
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25636 91177308-0d34-0410-b5e6-96231b3b80d8
98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
//===-- llvm/InlineAsm.h - Class to represent inline asm strings-*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Chris Lattner and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class represents the inline asm strings, which are Value*'s that are
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// used as the callee operand of call instructions. InlineAsm's are uniqued
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// like constants, and created via InlineAsm::get(...).
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_INLINEASM_H
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#define LLVM_INLINEASM_H
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#include "llvm/Value.h"
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#include <vector>
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namespace llvm {
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struct AssemblyAnnotationWriter;
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class PointerType;
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class FunctionType;
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class Module;
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class InlineAsm : public Value {
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InlineAsm(const InlineAsm &); // do not implement
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void operator=(const InlineAsm&); // do not implement
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std::string AsmString, Constraints;
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bool HasSideEffects;
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InlineAsm(const FunctionType *Ty, const std::string &AsmString,
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const std::string &Constraints, bool hasSideEffects);
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public:
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/// InlineAsm::get - Return the the specified uniqued inline asm string.
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///
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static InlineAsm *get(const FunctionType *Ty, const std::string &AsmString,
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const std::string &Constraints, bool hasSideEffects);
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bool hasSideEffects() const { return HasSideEffects; }
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/// getType - InlineAsm's are always pointers.
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///
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const PointerType *getType() const {
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return reinterpret_cast<const PointerType*>(Value::getType());
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}
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/// getFunctionType - InlineAsm's are always pointers to functions.
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///
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const FunctionType *getFunctionType() const;
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const std::string &getAsmString() const { return AsmString; }
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const std::string &getConstraintString() const { return Constraints; }
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virtual void print(std::ostream &O) const { print(O, 0); }
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void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const;
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/// Verify - This static method can be used by the parser to check to see if
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/// the specified constraint string is legal for the type. This returns true
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/// if legal, false if not.
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///
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static bool Verify(const FunctionType *Ty, const std::string &Constraints);
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// Constraint String Parsing
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enum ConstraintPrefix {
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isInput, // 'x'
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isOutput, // '=x'
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isIndirectOutput, // '==x'
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isClobber, // '~x'
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};
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/// ParseConstraints - Split up the constraint string into the specific
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/// constraints and their prefixes. If this returns an empty vector, and if
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/// the constraint string itself isn't empty, there was an error parsing.
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static std::vector<std::pair<ConstraintPrefix, std::string> >
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ParseConstraints(const std::string &ConstraintString);
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std::vector<std::pair<ConstraintPrefix, std::string> >
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ParseConstraints() const {
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return ParseConstraints(Constraints);
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const InlineAsm *) { return true; }
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static inline bool classof(const Value *V) {
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return V->getValueType() == Value::InlineAsmVal;
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}
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};
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} // End llvm namespace
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#endif
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