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cc56e116fe
object is always constant. As such, evaluate it at compile time instead of storing it as an ivar in SymbolTableListTraits. This shrinks every SymbolTableListTraits ilist by a word, shrinking BasicBlock from 44->40 bytes, Function from 96->88 bytes, and Module from 60->52 bytes. llvm-svn: 36189
77 lines
3.1 KiB
C++
77 lines
3.1 KiB
C++
//===-- llvm/SymbolTableListTraits.h - Traits for iplist --------*- 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 the LLVM research group 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 file defines a generic class that is used to implement the automatic
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// symbol table manipulation that occurs when you put (for example) a named
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// instruction into a basic block.
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//
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// The way that this is implemented is by using a special traits class with the
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// intrusive list that makes up the list of instructions in a basic block. When
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// a new element is added to the list of instructions, the traits class is
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// notified, allowing the symbol table to be updated.
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//
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// This generic class implements the traits class. It must be generic so that
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// it can work for all uses it, which include lists of instructions, basic
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// blocks, arguments, functions, global variables, etc...
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SYMBOLTABLELISTTRAITS_H
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#define LLVM_SYMBOLTABLELISTTRAITS_H
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namespace llvm {
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template<typename NodeTy> class ilist_iterator;
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template<typename NodeTy, typename Traits> class iplist;
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template<typename Ty> struct ilist_traits;
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// ValueSubClass - The type of objects that I hold, e.g. Instruction.
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// ItemParentType - The type of object that owns the list, e.g. BasicBlock.
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// TraitBaseClass - The class this trait should inherit from, it should
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// inherit from ilist_traits<ValueSubClass>
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//
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template<typename ValueSubClass, typename ItemParentClass>
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class SymbolTableListTraits {
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typedef ilist_traits<ValueSubClass> TraitsClass;
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public:
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SymbolTableListTraits() {}
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/// getListOwner - Return the object that owns this list. If this is a list
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/// of instructions, it returns the BasicBlock that owns them.
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ItemParentClass *getListOwner() {
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return reinterpret_cast<ItemParentClass*>((char*)this-
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TraitsClass::getListOffset());
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}
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static ValueSubClass *getPrev(ValueSubClass *V) { return V->getPrev(); }
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static ValueSubClass *getNext(ValueSubClass *V) { return V->getNext(); }
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static const ValueSubClass *getPrev(const ValueSubClass *V) {
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return V->getPrev();
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}
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static const ValueSubClass *getNext(const ValueSubClass *V) {
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return V->getNext();
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}
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static void setPrev(ValueSubClass *V, ValueSubClass *P) { V->setPrev(P); }
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static void setNext(ValueSubClass *V, ValueSubClass *N) { V->setNext(N); }
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void addNodeToList(ValueSubClass *V);
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void removeNodeFromList(ValueSubClass *V);
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void transferNodesFromList(iplist<ValueSubClass,
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ilist_traits<ValueSubClass> > &L2,
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ilist_iterator<ValueSubClass> first,
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ilist_iterator<ValueSubClass> last);
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//private:
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template<typename TPtr>
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void setSymTabObject(TPtr *, TPtr);
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};
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} // End llvm namespace
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#endif
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