mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-30 16:17:05 +00:00
3ea58b6d7a
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91920 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
//===-- llvm/CodeGen/SDNodeOrdering.h - SDNode Ordering ---------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file declares the SDNodeOrdering class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CODEGEN_SDNODEORDERING_H
|
|
#define LLVM_CODEGEN_SDNODEORDERING_H
|
|
|
|
#include "llvm/ADT/DenseMap.h"
|
|
|
|
namespace llvm {
|
|
|
|
class SDNode;
|
|
|
|
/// SDNodeOrdering - Maps a unique (monotonically increasing) value to each
|
|
/// SDNode that roughly corresponds to the ordering of the original LLVM
|
|
/// instruction. This is used for turning off scheduling, because we'll forgo
|
|
/// the normal scheduling algorithms and output the instructions according to
|
|
/// this ordering.
|
|
class SDNodeOrdering {
|
|
DenseMap<const SDNode*, unsigned> OrderMap;
|
|
|
|
void operator=(const SDNodeOrdering&); // Do not implement.
|
|
SDNodeOrdering(const SDNodeOrdering&); // Do not implement.
|
|
public:
|
|
SDNodeOrdering() {}
|
|
|
|
void add(const SDNode *Node, unsigned O) {
|
|
OrderMap[Node] = O;
|
|
}
|
|
void remove(const SDNode *Node) {
|
|
DenseMap<const SDNode*, unsigned>::iterator Itr = OrderMap.find(Node);
|
|
if (Itr != OrderMap.end())
|
|
OrderMap.erase(Itr);
|
|
}
|
|
void clear() {
|
|
OrderMap.clear();
|
|
}
|
|
unsigned getOrder(const SDNode *Node) {
|
|
return OrderMap[Node];
|
|
}
|
|
};
|
|
|
|
} // end llvm namespace
|
|
|
|
#endif
|