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llvm-mirror/lib/CodeGen/RegAlloc/IGNode.cpp
2002-09-14 23:05:33 +00:00

39 lines
1.3 KiB
C++

//===-- IGNode.cpp -------------------------------------------------------===//
//
// class IGNode for coloring-based register allocation for LLVM.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/IGNode.h"
#include <algorithm>
#include <iostream>
using std::cerr;
//-----------------------------------------------------------------------------
// Sets this IGNode on stack and reduce the degree of neighbors
//-----------------------------------------------------------------------------
void IGNode::pushOnStack() {
OnStack = true;
int neighs = AdjList.size();
if (neighs < 0) {
cerr << "\nAdj List size = " << neighs;
assert(0 && "Invalid adj list size");
}
for(int i=0; i < neighs; i++)
AdjList[i]->decCurDegree();
}
//-----------------------------------------------------------------------------
// Deletes an adjacency node. IGNodes are deleted when coalescing merges
// two IGNodes together.
//-----------------------------------------------------------------------------
void IGNode::delAdjIGNode(const IGNode *Node) {
std::vector<IGNode *>::iterator It=find(AdjList.begin(), AdjList.end(), Node);
assert( It != AdjList.end() ); // the node must be there
AdjList.erase(It);
}