[llvm-commits] PATCH: Add machine post dominator pass
Tom Stellard
tom at stellard.net
Fri Sep 14 11:12:56 PDT 2012
Hi,
The attached patch adds a machine post dominator pass. This is used by
both the R600 and AMDIL backends.
Please Review.
-Tom
-------------- next part --------------
diff --git include/llvm/CodeGen/MachinePostDominators.h include/llvm/CodeGen/MachinePostDominators.h
new file mode 100644
index 0000000..0fc4554
--- /dev/null
+++ include/llvm/CodeGen/MachinePostDominators.h
@@ -0,0 +1,85 @@
+//=- llvm/CodeGen/MachineDominators.h ----------------------------*- C++ -*-==//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file exposes interfaces to post dominance information for
+// target-specific code.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_MACHINEPOSTDOMINATORS_H
+#define LLVM_CODEGEN_MACHINEPOSTDOMINATORS_H
+
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineDominators.h"
+#include "llvm/Analysis/Dominators.h"
+#include "llvm/Analysis/DominatorInternals.h"
+
+namespace llvm {
+
+///
+/// PostDominatorTree Class - Concrete subclass of DominatorTree that is used
+/// to compute the a post-dominator tree.
+///
+struct MachinePostDominatorTree : public MachineFunctionPass {
+ static char ID;
+
+ DominatorTreeBase<MachineBasicBlock> *DT;
+
+ MachinePostDominatorTree();
+
+ ~MachinePostDominatorTree();
+
+ FunctionPass *createMachinePostDominatorTreePass();
+
+ inline const std::vector<MachineBasicBlock *> &getRoots() const {
+ return DT->getRoots();
+ }
+
+ inline MachineDomTreeNode *getRootNode() const {
+ return DT->getRootNode();
+ }
+
+ inline MachineDomTreeNode *operator[](MachineBasicBlock *BB) const {
+ return DT->getNode(BB);
+ }
+
+ inline MachineDomTreeNode *getNode(MachineBasicBlock *BB) const {
+ return DT->getNode(BB);
+ }
+
+ inline bool dominates(MachineDomTreeNode *A, MachineDomTreeNode *B) const {
+ return DT->dominates(A, B);
+ }
+
+ inline bool dominates(MachineBasicBlock *A, MachineBasicBlock *B) const {
+ return DT->dominates(A, B);
+ }
+
+ inline bool
+ properlyDominates(const MachineDomTreeNode *A, MachineDomTreeNode *B) const {
+ return DT->properlyDominates(A, B);
+ }
+
+ inline bool
+ properlyDominates(MachineBasicBlock *A, MachineBasicBlock *B) const {
+ return DT->properlyDominates(A, B);
+ }
+
+ inline MachineBasicBlock *findNearestCommonDominator(MachineBasicBlock *A,
+ MachineBasicBlock *B) {
+ return DT->findNearestCommonDominator(A, B);
+ }
+
+ virtual bool runOnMachineFunction(MachineFunction &MF);
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const;
+ virtual void print(llvm::raw_ostream &OS, const Module *M = 0) const;
+};
+} //end of namespace llvm
+
+#endif
diff --git include/llvm/InitializePasses.h include/llvm/InitializePasses.h
index 84c2b65..76c22b0 100644
--- include/llvm/InitializePasses.h
+++ include/llvm/InitializePasses.h
@@ -167,6 +167,7 @@ void initializeMachineBlockPlacementStatsPass(PassRegistry&);
void initializeMachineBranchProbabilityInfoPass(PassRegistry&);
void initializeMachineCSEPass(PassRegistry&);
void initializeMachineDominatorTreePass(PassRegistry&);
+void initializeMachinePostDominatorTreePass(PassRegistry&);
void initializeMachineLICMPass(PassRegistry&);
void initializeMachineLoopInfoPass(PassRegistry&);
void initializeMachineLoopRangesPass(PassRegistry&);
diff --git lib/CodeGen/CMakeLists.txt lib/CodeGen/CMakeLists.txt
index 386509b..32794fd 100644
--- lib/CodeGen/CMakeLists.txt
+++ lib/CodeGen/CMakeLists.txt
@@ -45,6 +45,7 @@ add_llvm_library(LLVMCodeGen
MachineCopyPropagation.cpp
MachineCSE.cpp
MachineDominators.cpp
+ MachinePostDominators.cpp
MachineFunction.cpp
MachineFunctionAnalysis.cpp
MachineFunctionPass.cpp
diff --git lib/CodeGen/CodeGen.cpp lib/CodeGen/CodeGen.cpp
index 65f0941..a53f6f8 100644
--- lib/CodeGen/CodeGen.cpp
+++ lib/CodeGen/CodeGen.cpp
@@ -41,6 +41,7 @@ void llvm::initializeCodeGen(PassRegistry &Registry) {
initializeMachineCopyPropagationPass(Registry);
initializeMachineCSEPass(Registry);
initializeMachineDominatorTreePass(Registry);
+ initializeMachinePostDominatorTreePass(Registry);
initializeMachineLICMPass(Registry);
initializeMachineLoopInfoPass(Registry);
initializeMachineModuleInfoPass(Registry);
diff --git lib/CodeGen/MachinePostDominators.cpp lib/CodeGen/MachinePostDominators.cpp
new file mode 100644
index 0000000..c3f6e92
--- /dev/null
+++ lib/CodeGen/MachinePostDominators.cpp
@@ -0,0 +1,55 @@
+//===- 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);
+}
More information about the llvm-commits
mailing list