1 //===- PostDominators.cpp - Post-Dominator Calculation --------------------===//
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 // This file implements the post-dominator construction algorithms.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "llvm/Analysis/PostDominators.h"
15 #include "llvm/ADT/DepthFirstIterator.h"
16 #include "llvm/ADT/SetOperations.h"
17 #include "llvm/IR/CFG.h"
18 #include "llvm/IR/Instructions.h"
19 #include "llvm/IR/PassManager.h"
20 #include "llvm/Support/Debug.h"
21 #include "llvm/Support/GenericDomTreeConstruction.h"
22 using namespace llvm;
23
24 #define DEBUG_TYPE "postdomtree"
25
26 //===----------------------------------------------------------------------===//
27 // PostDominatorTree Implementation
28 //===----------------------------------------------------------------------===//
29
30 char PostDominatorTreeWrapperPass::ID = 0;
31 INITIALIZE_PASS(PostDominatorTreeWrapperPass, "postdomtree",
32 "Post-Dominator Tree Construction", true, true)
33
runOnFunction(Function & F)34 bool PostDominatorTreeWrapperPass::runOnFunction(Function &F) {
35 DT.recalculate(F);
36 return false;
37 }
38
print(raw_ostream & OS,const Module *) const39 void PostDominatorTreeWrapperPass::print(raw_ostream &OS, const Module *) const {
40 DT.print(OS);
41 }
42
createPostDomTree()43 FunctionPass* llvm::createPostDomTree() {
44 return new PostDominatorTreeWrapperPass();
45 }
46
47 char PostDominatorTreeAnalysis::PassID;
48
run(Function & F,FunctionAnalysisManager &)49 PostDominatorTree PostDominatorTreeAnalysis::run(Function &F,
50 FunctionAnalysisManager &) {
51 PostDominatorTree PDT;
52 PDT.recalculate(F);
53 return PDT;
54 }
55
PostDominatorTreePrinterPass(raw_ostream & OS)56 PostDominatorTreePrinterPass::PostDominatorTreePrinterPass(raw_ostream &OS)
57 : OS(OS) {}
58
59 PreservedAnalyses
run(Function & F,FunctionAnalysisManager & AM)60 PostDominatorTreePrinterPass::run(Function &F, FunctionAnalysisManager &AM) {
61 OS << "PostDominatorTree for function: " << F.getName() << "\n";
62 AM.getResult<PostDominatorTreeAnalysis>(F).print(OS);
63
64 return PreservedAnalyses::all();
65 }
66