1 //===- MachineDominanceFrontier.cpp ---------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "llvm/CodeGen/MachineDominanceFrontier.h"
10 #include "llvm/Analysis/DominanceFrontierImpl.h"
11 #include "llvm/CodeGen/MachineDominators.h"
12 #include "llvm/CodeGen/Passes.h"
13 #include "llvm/InitializePasses.h"
14
15 using namespace llvm;
16
17 namespace llvm {
18 template class DominanceFrontierBase<MachineBasicBlock, false>;
19 template class DominanceFrontierBase<MachineBasicBlock, true>;
20 template class ForwardDominanceFrontierBase<MachineBasicBlock>;
21 }
22
23
24 char MachineDominanceFrontier::ID = 0;
25
26 INITIALIZE_PASS_BEGIN(MachineDominanceFrontier, "machine-domfrontier",
27 "Machine Dominance Frontier Construction", true, true)
INITIALIZE_PASS_DEPENDENCY(MachineDominatorTree)28 INITIALIZE_PASS_DEPENDENCY(MachineDominatorTree)
29 INITIALIZE_PASS_END(MachineDominanceFrontier, "machine-domfrontier",
30 "Machine Dominance Frontier Construction", true, true)
31
32 MachineDominanceFrontier::MachineDominanceFrontier()
33 : MachineFunctionPass(ID),
34 Base() {
35 initializeMachineDominanceFrontierPass(*PassRegistry::getPassRegistry());
36 }
37
38 char &llvm::MachineDominanceFrontierID = MachineDominanceFrontier::ID;
39
runOnMachineFunction(MachineFunction &)40 bool MachineDominanceFrontier::runOnMachineFunction(MachineFunction &) {
41 releaseMemory();
42 Base.analyze(getAnalysis<MachineDominatorTree>().getBase());
43 return false;
44 }
45
releaseMemory()46 void MachineDominanceFrontier::releaseMemory() {
47 Base.releaseMemory();
48 }
49
getAnalysisUsage(AnalysisUsage & AU) const50 void MachineDominanceFrontier::getAnalysisUsage(AnalysisUsage &AU) const {
51 AU.setPreservesAll();
52 AU.addRequired<MachineDominatorTree>();
53 MachineFunctionPass::getAnalysisUsage(AU);
54 }
55