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https://github.com/c64scene-ar/llvm-6502.git
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3cbfa1617f
Summary: The only current use of this flag is to mark the alloca as dynamic, even if its in the entry block. The stack adjustment for the alloca can never be folded into the prologue because the call may clear it and it has to be allocated at the top of the stack. Reviewers: majnemer CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D2571 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199525 91177308-0d34-0410-b5e6-96231b3b80d8
114 lines
3.7 KiB
C++
114 lines
3.7 KiB
C++
//===-- llvm/Argument.h - Definition of the Argument class ------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the Argument class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_ARGUMENT_H
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#define LLVM_IR_ARGUMENT_H
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#include "llvm/ADT/Twine.h"
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#include "llvm/ADT/ilist_node.h"
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#include "llvm/IR/Attributes.h"
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#include "llvm/IR/Value.h"
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namespace llvm {
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template<typename ValueSubClass, typename ItemParentClass>
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class SymbolTableListTraits;
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/// \brief LLVM Argument representation
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///
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/// This class represents an incoming formal argument to a Function. A formal
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/// argument, since it is ``formal'', does not contain an actual value but
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/// instead represents the type, argument number, and attributes of an argument
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/// for a specific function. When used in the body of said function, the
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/// argument of course represents the value of the actual argument that the
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/// function was called with.
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class Argument : public Value, public ilist_node<Argument> {
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virtual void anchor();
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Function *Parent;
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friend class SymbolTableListTraits<Argument, Function>;
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void setParent(Function *parent);
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public:
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/// \brief Constructor.
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///
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/// If \p F is specified, the argument is inserted at the end of the argument
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/// list for \p F.
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explicit Argument(Type *Ty, const Twine &Name = "", Function *F = 0);
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inline const Function *getParent() const { return Parent; }
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inline Function *getParent() { return Parent; }
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/// \brief Return the index of this formal argument in its containing
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/// function.
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///
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/// For example in "void foo(int a, float b)" a is 0 and b is 1.
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unsigned getArgNo() const;
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/// \brief Return true if this argument has the byval attribute on it in its
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/// containing function.
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bool hasByValAttr() const;
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/// \brief Return true if this argument has the byval attribute or inalloca
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/// attribute on it in its containing function. These attributes both
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/// represent arguments being passed by value.
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bool hasByValOrInAllocaAttr() const;
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/// \brief If this is a byval or inalloca argument, return its alignment.
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unsigned getParamAlignment() const;
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/// \brief Return true if this argument has the nest attribute on it in its
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/// containing function.
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bool hasNestAttr() const;
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/// \brief Return true if this argument has the noalias attribute on it in its
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/// containing function.
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bool hasNoAliasAttr() const;
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/// \brief Return true if this argument has the nocapture attribute on it in
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/// its containing function.
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bool hasNoCaptureAttr() const;
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/// \brief Return true if this argument has the sret attribute on it in its
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/// containing function.
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bool hasStructRetAttr() const;
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/// \brief Return true if this argument has the returned attribute on it in
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/// its containing function.
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bool hasReturnedAttr() const;
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/// \brief Return true if this argument has the readonly or readnone attribute
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/// on it in its containing function.
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bool onlyReadsMemory() const;
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/// \brief Return true if this argument has the inalloca attribute on it in
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/// its containing function.
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bool hasInAllocaAttr() const;
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/// \brief Add a Attribute to an argument.
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void addAttr(AttributeSet AS);
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/// \brief Remove a Attribute from an argument.
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void removeAttr(AttributeSet AS);
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/// \brief Method for support type inquiry through isa, cast, and
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/// dyn_cast.
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static inline bool classof(const Value *V) {
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return V->getValueID() == ArgumentVal;
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}
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};
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} // End llvm namespace
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#endif
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