1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
//===- MachinePostDominators.cpp -Machine Post Dominator Calculation ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements simple dominator construction algorithms for finding
// post dominators on machine functions.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachinePostDominators.h"
using namespace llvm;
char MachinePostDominatorTree::ID = 0;
//declare initializeMachinePostDominatorTreePass
INITIALIZE_PASS(MachinePostDominatorTree, "machinepostdomtree",
"MachinePostDominator Tree Construction", true, true)
MachinePostDominatorTree::MachinePostDominatorTree() : MachineFunctionPass(ID) {
initializeMachinePostDominatorTreePass(*PassRegistry::getPassRegistry());
DT = new DominatorTreeBase<MachineBasicBlock>(true); //true indicate
// postdominator
}
FunctionPass *
MachinePostDominatorTree::createMachinePostDominatorTreePass() {
return new MachinePostDominatorTree();
}
bool
MachinePostDominatorTree::runOnMachineFunction(MachineFunction &F) {
DT->recalculate(F);
return false;
}
MachinePostDominatorTree::~MachinePostDominatorTree() {
delete DT;
}
void
MachinePostDominatorTree::getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
MachineFunctionPass::getAnalysisUsage(AU);
}
void
MachinePostDominatorTree::print(llvm::raw_ostream &OS, const Module *M) const {
DT->print(OS);
}
|
