1//===- MachineDominanceFrontier.cpp ---------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "llvm/CodeGen/MachineDominanceFrontier.h"
11#include "llvm/Analysis/DominanceFrontierImpl.h"
12#include "llvm/CodeGen/MachineDominators.h"
13#include "llvm/CodeGen/Passes.h"
14
15
16using namespace llvm;
17
18namespace llvm {
19template class DominanceFrontierBase<MachineBasicBlock>;
20template class ForwardDominanceFrontierBase<MachineBasicBlock>;
21}
22
23
24char MachineDominanceFrontier::ID = 0;
25
26INITIALIZE_PASS_BEGIN(MachineDominanceFrontier, "machine-domfrontier",
27                "Machine Dominance Frontier Construction", true, true)
28INITIALIZE_PASS_DEPENDENCY(MachineDominatorTree)
29INITIALIZE_PASS_END(MachineDominanceFrontier, "machine-domfrontier",
30                "Machine Dominance Frontier Construction", true, true)
31
32MachineDominanceFrontier::MachineDominanceFrontier()
33  : MachineFunctionPass(ID),
34    Base() {
35  initializeMachineDominanceFrontierPass(*PassRegistry::getPassRegistry());
36}
37
38char &llvm::MachineDominanceFrontierID = MachineDominanceFrontier::ID;
39
40bool MachineDominanceFrontier::runOnMachineFunction(MachineFunction &) {
41  releaseMemory();
42  Base.analyze(getAnalysis<MachineDominatorTree>().getBase());
43  return false;
44}
45
46void MachineDominanceFrontier::releaseMemory() {
47  Base.releaseMemory();
48}
49
50void MachineDominanceFrontier::getAnalysisUsage(AnalysisUsage &AU) const {
51  AU.setPreservesAll();
52  AU.addRequired<MachineDominatorTree>();
53  MachineFunctionPass::getAnalysisUsage(AU);
54}
55