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/CodeGen/MachineDominators.h"
11 #include "llvm/CodeGen/Passes.h"
12 #include "llvm/InitializePasses.h"
13 #include "llvm/Pass.h"
14 #include "llvm/PassRegistry.h"
15
16 using namespace llvm;
17
18 namespace llvm {
19 template class DominanceFrontierBase<MachineBasicBlock, false>;
20 template class DominanceFrontierBase<MachineBasicBlock, true>;
21 template class ForwardDominanceFrontierBase<MachineBasicBlock>;
22 }
23
24
25 char MachineDominanceFrontier::ID = 0;
26
27 INITIALIZE_PASS_BEGIN(MachineDominanceFrontier, "machine-domfrontier",
28 "Machine Dominance Frontier Construction", true, true)
INITIALIZE_PASS_DEPENDENCY(MachineDominatorTreeWrapperPass)29 INITIALIZE_PASS_DEPENDENCY(MachineDominatorTreeWrapperPass)
30 INITIALIZE_PASS_END(MachineDominanceFrontier, "machine-domfrontier",
31 "Machine Dominance Frontier Construction", true, true)
32
33 MachineDominanceFrontier::MachineDominanceFrontier() : MachineFunctionPass(ID) {
34 initializeMachineDominanceFrontierPass(*PassRegistry::getPassRegistry());
35 }
36
37 char &llvm::MachineDominanceFrontierID = MachineDominanceFrontier::ID;
38
runOnMachineFunction(MachineFunction &)39 bool MachineDominanceFrontier::runOnMachineFunction(MachineFunction &) {
40 releaseMemory();
41 Base.analyze(
42 getAnalysis<MachineDominatorTreeWrapperPass>().getDomTree().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<MachineDominatorTreeWrapperPass>();
53 MachineFunctionPass::getAnalysisUsage(AU);
54 }
55