mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-03 14:21:30 +00:00
c0ccb8bb17
This nicely handles the most common case of virtual register sets, but also handles anticipated cases where we will map pointers to IDs. The goal is not to develop a completely generic SparseSet template. Instead we want to handle the expected uses within llvm without any template antics in the client code. I'm adding a bit of template nastiness here, and some assumption about expected usage in order to make the client code very clean. The expected common uses cases I'm designing for: - integer keys that need to be reindexed, and may map to additional data - densely numbered objects where we want pointer keys because no number->object map exists. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155227 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
//===- llvm/ADT/IndexedMap.h - An index map 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 an indexed map. The index map template takes two
|
|
// types. The first is the mapped type and the second is a functor
|
|
// that maps its argument to a size_t. On instantiation a "null" value
|
|
// can be provided to be used as a "does not exist" indicator in the
|
|
// map. A member function grow() is provided that given the value of
|
|
// the maximally indexed key (the argument of the functor) makes sure
|
|
// the map has enough space for it.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_ADT_INDEXEDMAP_H
|
|
#define LLVM_ADT_INDEXEDMAP_H
|
|
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include <cassert>
|
|
#include <functional>
|
|
#include <vector>
|
|
|
|
namespace llvm {
|
|
|
|
template <typename T, typename ToIndexT = llvm::identity<unsigned> >
|
|
class IndexedMap {
|
|
typedef typename ToIndexT::argument_type IndexT;
|
|
typedef std::vector<T> StorageT;
|
|
StorageT storage_;
|
|
T nullVal_;
|
|
ToIndexT toIndex_;
|
|
|
|
public:
|
|
IndexedMap() : nullVal_(T()) { }
|
|
|
|
explicit IndexedMap(const T& val) : nullVal_(val) { }
|
|
|
|
typename StorageT::reference operator[](IndexT n) {
|
|
assert(toIndex_(n) < storage_.size() && "index out of bounds!");
|
|
return storage_[toIndex_(n)];
|
|
}
|
|
|
|
typename StorageT::const_reference operator[](IndexT n) const {
|
|
assert(toIndex_(n) < storage_.size() && "index out of bounds!");
|
|
return storage_[toIndex_(n)];
|
|
}
|
|
|
|
void reserve(typename StorageT::size_type s) {
|
|
storage_.reserve(s);
|
|
}
|
|
|
|
void resize(typename StorageT::size_type s) {
|
|
storage_.resize(s, nullVal_);
|
|
}
|
|
|
|
void clear() {
|
|
storage_.clear();
|
|
}
|
|
|
|
void grow(IndexT n) {
|
|
unsigned NewSize = toIndex_(n) + 1;
|
|
if (NewSize > storage_.size())
|
|
resize(NewSize);
|
|
}
|
|
|
|
bool inBounds(IndexT n) const {
|
|
return toIndex_(n) < storage_.size();
|
|
}
|
|
|
|
typename StorageT::size_type size() const {
|
|
return storage_.size();
|
|
}
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|