//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "postdomtree"
+
#include "llvm/Analysis/PostDominators.h"
-#include "llvm/Instructions.h"
-#include "llvm/Support/CFG.h"
#include "llvm/ADT/DepthFirstIterator.h"
#include "llvm/ADT/SetOperations.h"
-#include "PostDominatorCalculation.h"
+#include "llvm/IR/CFG.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/GenericDomTreeConstruction.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
char PostDominatorTree::ID = 0;
-char PostDominanceFrontier::ID = 0;
-static RegisterPass<PostDominatorTree>
-F("postdomtree", "Post-Dominator Tree Construction", true);
+INITIALIZE_PASS(PostDominatorTree, "postdomtree",
+ "Post-Dominator Tree Construction", true, true)
bool PostDominatorTree::runOnFunction(Function &F) {
- reset(); // Reset from the last time we were run...
-
- // Initialize the roots list
- for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
- TerminatorInst *Insn = I->getTerminator();
- if (Insn->getNumSuccessors() == 0) {
- // Unreachable block is not a root node.
- if (!isa<UnreachableInst>(Insn))
- Roots.push_back(I);
- }
-
- // Prepopulate maps so that we don't get iterator invalidation issues later.
- IDoms[I] = 0;
- DomTreeNodes[I] = 0;
- }
-
- Vertex.push_back(0);
-
- PDTcalculate(*this, F);
+ DT->recalculate(F);
return false;
}
-//===----------------------------------------------------------------------===//
-// PostDominanceFrontier Implementation
-//===----------------------------------------------------------------------===//
-
-static RegisterPass<PostDominanceFrontier>
-H("postdomfrontier", "Post-Dominance Frontier Construction", true);
-
-const DominanceFrontier::DomSetType &
-PostDominanceFrontier::calculate(const PostDominatorTree &DT,
- const DomTreeNode *Node) {
- // Loop over CFG successors to calculate DFlocal[Node]
- BasicBlock *BB = Node->getBlock();
- DomSetType &S = Frontiers[BB]; // The new set to fill in...
- if (getRoots().empty()) return S;
-
- if (BB)
- for (pred_iterator SI = pred_begin(BB), SE = pred_end(BB);
- SI != SE; ++SI) {
- // Does Node immediately dominate this predecessor?
- DomTreeNode *SINode = DT[*SI];
- if (SINode && SINode->getIDom() != Node)
- S.insert(*SI);
- }
+PostDominatorTree::~PostDominatorTree() {
+ delete DT;
+}
- // At this point, S is DFlocal. Now we union in DFup's of our children...
- // Loop through and visit the nodes that Node immediately dominates (Node's
- // children in the IDomTree)
- //
- for (DomTreeNode::const_iterator
- NI = Node->begin(), NE = Node->end(); NI != NE; ++NI) {
- DomTreeNode *IDominee = *NI;
- const DomSetType &ChildDF = calculate(DT, IDominee);
+void PostDominatorTree::print(raw_ostream &OS, const Module *) const {
+ DT->print(OS);
+}
- DomSetType::const_iterator CDFI = ChildDF.begin(), CDFE = ChildDF.end();
- for (; CDFI != CDFE; ++CDFI) {
- if (!DT.properlyDominates(Node, DT[*CDFI]))
- S.insert(*CDFI);
- }
- }
- return S;
+FunctionPass* llvm::createPostDomTree() {
+ return new PostDominatorTree();
}
-// Ensure that this .cpp file gets linked when PostDominators.h is used.
-DEFINING_FILE_FOR(PostDominanceFrontier)