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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
119 lines
4.2 KiB
C++
119 lines
4.2 KiB
C++
//===-- llvm/SymbolTableListTraitsImpl.h - Implementation ------*- 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 implements the stickier parts of the SymbolTableListTraits class,
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// and is explicitly instantiated where needed to avoid defining all this code
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// in a widely used header.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SYMBOLTABLELISTTRAITS_IMPL_H
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#define LLVM_SYMBOLTABLELISTTRAITS_IMPL_H
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#include "llvm/SymbolTableListTraits.h"
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#include "llvm/ValueSymbolTable.h"
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namespace llvm {
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/// setSymTabObject - This is called when (f.e.) the parent of a basic block
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/// changes. This requires us to remove all the instruction symtab entries from
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/// the current function and reinsert them into the new function.
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template<typename ValueSubClass, typename ItemParentClass>
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template<typename TPtr>
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void SymbolTableListTraits<ValueSubClass,ItemParentClass>
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::setSymTabObject(TPtr *Dest, TPtr Src) {
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// Get the old symtab and value list before doing the assignment.
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ValueSymbolTable *OldST = TraitsClass::getSymTab(getListOwner());
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// Do it.
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*Dest = Src;
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// Get the new SymTab object.
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ValueSymbolTable *NewST = TraitsClass::getSymTab(getListOwner());
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// If there is nothing to do, quick exit.
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if (OldST == NewST) return;
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// Move all the elements from the old symtab to the new one.
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iplist<ValueSubClass> &ItemList = TraitsClass::getList(getListOwner());
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if (ItemList.empty()) return;
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if (OldST) {
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// Remove all entries from the previous symtab.
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for (typename iplist<ValueSubClass>::iterator I = ItemList.begin();
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I != ItemList.end(); ++I)
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if (I->hasName())
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OldST->removeValueName(I->getValueName());
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}
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if (NewST) {
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// Add all of the items to the new symtab.
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for (typename iplist<ValueSubClass>::iterator I = ItemList.begin();
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I != ItemList.end(); ++I)
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if (I->hasName())
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NewST->reinsertValue(I);
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}
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}
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template<typename ValueSubClass, typename ItemParentClass>
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void SymbolTableListTraits<ValueSubClass,ItemParentClass>
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::addNodeToList(ValueSubClass *V) {
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assert(V->getParent() == 0 && "Value already in a container!!");
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ItemParentClass *Owner = getListOwner();
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V->setParent(Owner);
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if (V->hasName())
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if (ValueSymbolTable *ST = TraitsClass::getSymTab(Owner))
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ST->reinsertValue(V);
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}
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template<typename ValueSubClass, typename ItemParentClass>
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void SymbolTableListTraits<ValueSubClass,ItemParentClass>
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::removeNodeFromList(ValueSubClass *V) {
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V->setParent(0);
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if (V->hasName())
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if (ValueSymbolTable *ST = TraitsClass::getSymTab(getListOwner()))
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ST->removeValueName(V->getValueName());
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}
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template<typename ValueSubClass, typename ItemParentClass>
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void SymbolTableListTraits<ValueSubClass,ItemParentClass>
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::transferNodesFromList(iplist<ValueSubClass, ilist_traits<ValueSubClass> > &L2,
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ilist_iterator<ValueSubClass> first,
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ilist_iterator<ValueSubClass> last) {
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// We only have to do work here if transferring instructions between BBs
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ItemParentClass *NewIP = getListOwner(), *OldIP = L2.getListOwner();
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if (NewIP == OldIP) return; // No work to do at all...
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// We only have to update symbol table entries if we are transferring the
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// instructions to a different symtab object...
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ValueSymbolTable *NewST = TraitsClass::getSymTab(NewIP);
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ValueSymbolTable *OldST = TraitsClass::getSymTab(OldIP);
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if (NewST != OldST) {
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for (; first != last; ++first) {
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ValueSubClass &V = *first;
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bool HasName = V.hasName();
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if (OldST && HasName)
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OldST->removeValueName(V.getValueName());
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V.setParent(NewIP);
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if (NewST && HasName)
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NewST->reinsertValue(&V);
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}
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} else {
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// Just transferring between blocks in the same function, simply update the
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// parent fields in the instructions...
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for (; first != last; ++first)
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first->setParent(NewIP);
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}
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}
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} // End llvm namespace
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#endif
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