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Owen Anderson444710d2007-10-31 03:30:14 +00001//===- MachineDominators.cpp - Machine Dominator Calculation --------------===//
2//
3// The LLVM Compiler Infrastructure
4//
Chris Lattner081ce942007-12-29 20:36:04 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Owen Anderson444710d2007-10-31 03:30:14 +00007//
8//===----------------------------------------------------------------------===//
9//
10// This file implements simple dominator construction algorithms for finding
11// forward dominators on machine functions.
12//
13//===----------------------------------------------------------------------===//
14
15#include "llvm/CodeGen/MachineDominators.h"
Bill Wendling62264362008-01-04 20:54:55 +000016#include "llvm/CodeGen/Passes.h"
Owen Anderson444710d2007-10-31 03:30:14 +000017
18using namespace llvm;
19
John McCall86dd20e2009-12-16 00:13:24 +000020namespace llvm {
Owen Anderson444710d2007-10-31 03:30:14 +000021TEMPLATE_INSTANTIATION(class DomTreeNodeBase<MachineBasicBlock>);
22TEMPLATE_INSTANTIATION(class DominatorTreeBase<MachineBasicBlock>);
John McCall86dd20e2009-12-16 00:13:24 +000023}
Owen Anderson444710d2007-10-31 03:30:14 +000024
Chris Lattnercd8a3842008-01-05 20:15:42 +000025char MachineDominatorTree::ID = 0;
26
Owen Anderson291fe212010-08-23 17:52:01 +000027INITIALIZE_PASS(MachineDominatorTree, "machinedomtree",
Owen Anderson1434dfa2010-10-07 22:25:06 +000028 "MachineDominator Tree Construction", true, true)
Bill Wendling62264362008-01-04 20:54:55 +000029
Owen Anderson75693222010-08-06 18:33:48 +000030char &llvm::MachineDominatorsID = MachineDominatorTree::ID;
Dan Gohmanc24a3f82009-01-05 17:59:02 +000031
32void MachineDominatorTree::getAnalysisUsage(AnalysisUsage &AU) const {
33 AU.setPreservesAll();
34 MachineFunctionPass::getAnalysisUsage(AU);
35}
36
37bool MachineDominatorTree::runOnMachineFunction(MachineFunction &F) {
Stephen Hines37ed9c12014-12-01 14:51:49 -080038 CriticalEdgesToSplit.clear();
39 NewBBs.clear();
Dan Gohmanc24a3f82009-01-05 17:59:02 +000040 DT->recalculate(F);
41
42 return false;
43}
44
45MachineDominatorTree::MachineDominatorTree()
Owen Anderson75693222010-08-06 18:33:48 +000046 : MachineFunctionPass(ID) {
Owen Andersona65d6a62010-10-19 17:21:58 +000047 initializeMachineDominatorTreePass(*PassRegistry::getPassRegistry());
Dan Gohmanc24a3f82009-01-05 17:59:02 +000048 DT = new DominatorTreeBase<MachineBasicBlock>(false);
49}
50
51MachineDominatorTree::~MachineDominatorTree() {
Dan Gohmanc24a3f82009-01-05 17:59:02 +000052 delete DT;
53}
54
55void MachineDominatorTree::releaseMemory() {
56 DT->releaseMemory();
57}
Chris Lattnera7a9daa2009-08-23 05:17:37 +000058
Chris Lattner397f4562009-08-23 06:03:38 +000059void MachineDominatorTree::print(raw_ostream &OS, const Module*) const {
60 DT->print(OS);
Chris Lattnera7a9daa2009-08-23 05:17:37 +000061}