/3rd_party/llvm/lib/VMCore/SymbolTableListTraitsImpl.h
https://code.google.com/p/softart/ · C++ Header · 118 lines · 72 code · 17 blank · 29 comment · 30 complexity · 5804a642febd36f7c7f6d7d3d31e3bdb MD5 · raw file
- //===-- llvm/SymbolTableListTraitsImpl.h - Implementation ------*- C++ -*--===//
- //
- // The LLVM Compiler Infrastructure
- //
- // This file is distributed under the University of Illinois Open Source
- // License. See LICENSE.TXT for details.
- //
- //===----------------------------------------------------------------------===//
- //
- // This file implements the stickier parts of the SymbolTableListTraits class,
- // and is explicitly instantiated where needed to avoid defining all this code
- // in a widely used header.
- //
- //===----------------------------------------------------------------------===//
-
- #ifndef LLVM_SYMBOLTABLELISTTRAITS_IMPL_H
- #define LLVM_SYMBOLTABLELISTTRAITS_IMPL_H
-
- #include "llvm/SymbolTableListTraits.h"
- #include "llvm/ValueSymbolTable.h"
-
- namespace llvm {
-
- /// setSymTabObject - This is called when (f.e.) the parent of a basic block
- /// changes. This requires us to remove all the instruction symtab entries from
- /// the current function and reinsert them into the new function.
- template<typename ValueSubClass, typename ItemParentClass>
- template<typename TPtr>
- void SymbolTableListTraits<ValueSubClass,ItemParentClass>
- ::setSymTabObject(TPtr *Dest, TPtr Src) {
- // Get the old symtab and value list before doing the assignment.
- ValueSymbolTable *OldST = TraitsClass::getSymTab(getListOwner());
-
- // Do it.
- *Dest = Src;
-
- // Get the new SymTab object.
- ValueSymbolTable *NewST = TraitsClass::getSymTab(getListOwner());
-
- // If there is nothing to do, quick exit.
- if (OldST == NewST) return;
-
- // Move all the elements from the old symtab to the new one.
- iplist<ValueSubClass> &ItemList = TraitsClass::getList(getListOwner());
- if (ItemList.empty()) return;
-
- if (OldST) {
- // Remove all entries from the previous symtab.
- for (typename iplist<ValueSubClass>::iterator I = ItemList.begin();
- I != ItemList.end(); ++I)
- if (I->hasName())
- OldST->removeValueName(I->getValueName());
- }
-
- if (NewST) {
- // Add all of the items to the new symtab.
- for (typename iplist<ValueSubClass>::iterator I = ItemList.begin();
- I != ItemList.end(); ++I)
- if (I->hasName())
- NewST->reinsertValue(I);
- }
-
- }
-
- template<typename ValueSubClass, typename ItemParentClass>
- void SymbolTableListTraits<ValueSubClass,ItemParentClass>
- ::addNodeToList(ValueSubClass *V) {
- assert(V->getParent() == 0 && "Value already in a container!!");
- ItemParentClass *Owner = getListOwner();
- V->setParent(Owner);
- if (V->hasName())
- if (ValueSymbolTable *ST = TraitsClass::getSymTab(Owner))
- ST->reinsertValue(V);
- }
-
- template<typename ValueSubClass, typename ItemParentClass>
- void SymbolTableListTraits<ValueSubClass,ItemParentClass>
- ::removeNodeFromList(ValueSubClass *V) {
- V->setParent(0);
- if (V->hasName())
- if (ValueSymbolTable *ST = TraitsClass::getSymTab(getListOwner()))
- ST->removeValueName(V->getValueName());
- }
-
- template<typename ValueSubClass, typename ItemParentClass>
- void SymbolTableListTraits<ValueSubClass,ItemParentClass>
- ::transferNodesFromList(ilist_traits<ValueSubClass> &L2,
- ilist_iterator<ValueSubClass> first,
- ilist_iterator<ValueSubClass> last) {
- // We only have to do work here if transferring instructions between BBs
- ItemParentClass *NewIP = getListOwner(), *OldIP = L2.getListOwner();
- if (NewIP == OldIP) return; // No work to do at all...
-
- // We only have to update symbol table entries if we are transferring the
- // instructions to a different symtab object...
- ValueSymbolTable *NewST = TraitsClass::getSymTab(NewIP);
- ValueSymbolTable *OldST = TraitsClass::getSymTab(OldIP);
- if (NewST != OldST) {
- for (; first != last; ++first) {
- ValueSubClass &V = *first;
- bool HasName = V.hasName();
- if (OldST && HasName)
- OldST->removeValueName(V.getValueName());
- V.setParent(NewIP);
- if (NewST && HasName)
- NewST->reinsertValue(&V);
- }
- } else {
- // Just transferring between blocks in the same function, simply update the
- // parent fields in the instructions...
- for (; first != last; ++first)
- first->setParent(NewIP);
- }
- }
-
- } // End llvm namespace
-
- #endif