Introduce analysis pass to compute PostDominators in the new pass manager. NFC

Differential Revision: http://reviews.llvm.org/D17537

llvm-svn: 261882

1 files changed, 24 insertions, 10 deletions

diff --git a/llvm/lib/Analysis/PostDominators.cpp b/llvm/lib/Analysis/PostDominators.cpp
index 6d929091e3d..b515108fafb 100644
--- a/llvm/lib/Analysis/PostDominators.cpp
+++ b/llvm/lib/Analysis/PostDominators.cpp
@@ -16,6 +16,7 @@
 #include "llvm/ADT/SetOperations.h"
 #include "llvm/IR/CFG.h"
 #include "llvm/IR/Instructions.h"
+#include "llvm/IR/PassManager.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/GenericDomTreeConstruction.h"
 using namespace llvm;
@@ -26,25 +27,38 @@ using namespace llvm;
 //  PostDominatorTree Implementation
 //===----------------------------------------------------------------------===//
 
-char PostDominatorTree::ID = 0;
-INITIALIZE_PASS(PostDominatorTree, "postdomtree",
+char PostDominatorTreeWrapperPass::ID = 0;
+INITIALIZE_PASS(PostDominatorTreeWrapperPass, "postdomtree",
                 "Post-Dominator Tree Construction", true, true)
 
-bool PostDominatorTree::runOnFunction(Function &F) {
-  DT->recalculate(F);
+bool PostDominatorTreeWrapperPass::runOnFunction(Function &F) {
+  DT.recalculate(F);
   return false;
 }
 
-PostDominatorTree::~PostDominatorTree() {
-  delete DT;
+void PostDominatorTreeWrapperPass::print(raw_ostream &OS, const Module *) const {
+  DT.print(OS);
 }
 
-void PostDominatorTree::print(raw_ostream &OS, const Module *) const {
-  DT->print(OS);
+FunctionPass* llvm::createPostDomTree() {
+  return new PostDominatorTreeWrapperPass();
 }
 
+char PostDominatorTreeAnalysis::PassID;
 
-FunctionPass* llvm::createPostDomTree() {
-  return new PostDominatorTree();
+PostDominatorTree PostDominatorTreeAnalysis::run(Function &F) {
+  PostDominatorTree PDT;
+  PDT.recalculate(F);
+  return PDT;
 }
 
+PostDominatorTreePrinterPass::PostDominatorTreePrinterPass(raw_ostream &OS)
+  : OS(OS) {}
+
+PreservedAnalyses
+PostDominatorTreePrinterPass::run(Function &F, FunctionAnalysisManager *AM) {
+  OS << "PostDominatorTree for function: " << F.getName() << "\n";
+  AM->getResult<PostDominatorTreeAnalysis>(F).print(OS);
+
+  return PreservedAnalyses::all();
+}