mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
f6caa6f1e3
using the Curiously Recurring Template Pattern with LoopBase. This will help further refactoring, and future functionality for Loop. Also, Headers can now foward-declare Loop, instead of pulling in LoopInfo.h or doing tricks. llvm-svn: 75519
45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
//===- MachineLoopInfo.cpp - Natural Loop Calculator ----------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the MachineLoopInfo class that is used to identify natural
|
|
// loops and determine the loop depth of various nodes of the CFG. Note that
|
|
// the loops identified may actually be several natural loops that share the
|
|
// same header node... not just a single natural loop.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/CodeGen/MachineLoopInfo.h"
|
|
#include "llvm/CodeGen/MachineDominators.h"
|
|
#include "llvm/CodeGen/Passes.h"
|
|
using namespace llvm;
|
|
|
|
#define MLB class LoopBase<MachineBasicBlock, MachineLoop>
|
|
TEMPLATE_INSTANTIATION(MLB);
|
|
#undef MLB
|
|
#define MLIB class LoopInfoBase<MachineBasicBlock, MachineLoop>
|
|
TEMPLATE_INSTANTIATION(MLIB);
|
|
#undef MLIB
|
|
|
|
char MachineLoopInfo::ID = 0;
|
|
static RegisterPass<MachineLoopInfo>
|
|
X("machine-loops", "Machine Natural Loop Construction", true);
|
|
|
|
const PassInfo *const llvm::MachineLoopInfoID = &X;
|
|
|
|
bool MachineLoopInfo::runOnMachineFunction(MachineFunction &) {
|
|
releaseMemory();
|
|
LI.Calculate(getAnalysis<MachineDominatorTree>().getBase()); // Update
|
|
return false;
|
|
}
|
|
|
|
void MachineLoopInfo::getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.setPreservesAll();
|
|
AU.addRequired<MachineDominatorTree>();
|
|
}
|