llvm/lib/Analysis/PostDominators.cpp
Chandler Carruth 8e27cb2f34 [PM] Make the AnalysisManager parameter to run methods a reference.
This was originally a pointer to support pass managers which didn't use
AnalysisManagers. However, that doesn't realistically come up much and
the complexity of supporting it doesn't really make sense.

In fact, *many* parts of the pass manager were just assuming the pointer
was never null already. This at least makes it much more explicit and
clear.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263219 91177308-0d34-0410-b5e6-96231b3b80d8
2016-03-11 11:05:24 +00:00

65 lines
2.0 KiB
C++

//===- PostDominators.cpp - 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 the post-dominator construction algorithms.
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/PostDominators.h"
#include "llvm/ADT/DepthFirstIterator.h"
#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;
#define DEBUG_TYPE "postdomtree"
//===----------------------------------------------------------------------===//
// PostDominatorTree Implementation
//===----------------------------------------------------------------------===//
char PostDominatorTreeWrapperPass::ID = 0;
INITIALIZE_PASS(PostDominatorTreeWrapperPass, "postdomtree",
"Post-Dominator Tree Construction", true, true)
bool PostDominatorTreeWrapperPass::runOnFunction(Function &F) {
DT.recalculate(F);
return false;
}
void PostDominatorTreeWrapperPass::print(raw_ostream &OS, const Module *) const {
DT.print(OS);
}
FunctionPass* llvm::createPostDomTree() {
return new PostDominatorTreeWrapperPass();
}
char PostDominatorTreeAnalysis::PassID;
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();
}