SCC: Change clients to use const, NFC

[oota-llvm.git] / tools / opt / PrintSCC.cpp

diff --git a/tools/opt/PrintSCC.cpp b/tools/opt/PrintSCC.cpp
index c0adf5ca0342577970a8b87771eb9a66cc807140..78ede2b72f84905dee1cb8dea29a9faeec7f80f8 100644 (file)
--- a/tools/opt/PrintSCC.cpp
+++ b/tools/opt/PrintSCC.cpp
@@ -2,8 +2,8 @@
 //
 //                     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.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -14,70 +14,76 @@
 //
 // (1) As a reference for how to use the scc_iterator.
 // (2) To print out the SCCs for a CFG or a CallGraph:
-//       analyze -cfgscc            to print the SCCs in each CFG of a module.
-//       analyze -cfgscc -stats     to print the #SCCs and the maximum SCC size.
-//       analyze -cfgscc -debug > /dev/null to watch the algorithm in action.
+//       analyze -print-cfg-sccs            to print the SCCs in each CFG of a module.
+//       analyze -print-cfg-sccs -stats     to print the #SCCs and the maximum SCC size.
+//       analyze -print-cfg-sccs -debug > /dev/null to watch the algorithm in action.
 //
 //     and similarly:
-//       analyze -callscc [-stats] [-debug] to print SCCs in the CallGraph
+//       analyze -print-callgraph-sccs [-stats] [-debug] to print SCCs in the CallGraph
 //
 // (3) To test the scc_iterator.
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Pass.h"
-#include "llvm/Module.h"
-#include "llvm/Analysis/CallGraph.h"
-#include "llvm/Support/CFG.h"
 #include "llvm/ADT/SCCIterator.h"
-#include <iostream>
+#include "llvm/Analysis/CallGraph.h"
+#include "llvm/IR/CFG.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
 namespace {
   struct CFGSCC : public FunctionPass {
-    bool runOnFunction(Function& func);
+    static char ID;  // Pass identification, replacement for typeid
+    CFGSCC() : FunctionPass(ID) {}
+    bool runOnFunction(Function& func) override;
 
-    void print(std::ostream &O, const Module* = 0) const { }
+    void print(raw_ostream &O, const Module* = nullptr) const override { }
 
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.setPreservesAll();
     }
   };
 
   struct CallGraphSCC : public ModulePass {
+    static char ID;  // Pass identification, replacement for typeid
+    CallGraphSCC() : ModulePass(ID) {}
+
     // run - Print out SCCs in the call graph for the specified module.
-    bool runOnModule(Module &M);
+    bool runOnModule(Module &M) override;
 
-    void print(std::ostream &O, const Module* = 0) const { }
+    void print(raw_ostream &O, const Module* = nullptr) const override { }
 
     // getAnalysisUsage - This pass requires the CallGraph.
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.setPreservesAll();
-      AU.addRequired<CallGraph>();
+      AU.addRequired<CallGraphWrapperPass>();
     }
   };
+}
 
-  RegisterAnalysis<CFGSCC>
-  Y("cfgscc", "Print SCCs of each function CFG");
+char CFGSCC::ID = 0;
+static RegisterPass<CFGSCC>
+Y("print-cfg-sccs", "Print SCCs of each function CFG");
 
-  RegisterAnalysis<CallGraphSCC>
-  Z("callscc", "Print SCCs of the Call Graph");
-}
+char CallGraphSCC::ID = 0;
+static RegisterPass<CallGraphSCC>
+Z("print-callgraph-sccs", "Print SCCs of the Call Graph");
 
 bool CFGSCC::runOnFunction(Function &F) {
   unsigned sccNum = 0;
-  std::cout << "SCCs for Function " << F.getName() << " in PostOrder:";
-  for (scc_iterator<Function*> SCCI = scc_begin(&F),
-         E = scc_end(&F); SCCI != E; ++SCCI) {
-    std::vector<BasicBlock*> &nextSCC = *SCCI;
-    std::cout << "\nSCC #" << ++sccNum << " : ";
+  errs() << "SCCs for Function " << F.getName() << " in PostOrder:";
+  for (scc_iterator<Function*> SCCI = scc_begin(&F); !SCCI.isAtEnd(); ++SCCI) {
+    const std::vector<BasicBlock *> &nextSCC = *SCCI;
+    errs() << "\nSCC #" << ++sccNum << " : ";
     for (std::vector<BasicBlock*>::const_iterator I = nextSCC.begin(),
            E = nextSCC.end(); I != E; ++I)
-      std::cout << (*I)->getName() << ", ";
+      errs() << (*I)->getName() << ", ";
     if (nextSCC.size() == 1 && SCCI.hasLoop())
-      std::cout << " (Has self-loop).";
+      errs() << " (Has self-loop).";
   }
-  std::cout << "\n";
+  errs() << "\n";
 
   return true;
 }
@@ -85,21 +91,21 @@ bool CFGSCC::runOnFunction(Function &F) {
 
 // run - Print out SCCs in the call graph for the specified module.
 bool CallGraphSCC::runOnModule(Module &M) {
-  CallGraphNode* rootNode = getAnalysis<CallGraph>().getRoot();
+  CallGraph &CG = getAnalysis<CallGraphWrapperPass>().getCallGraph();
   unsigned sccNum = 0;
-  std::cout << "SCCs for the program in PostOrder:";
-  for (scc_iterator<CallGraphNode*> SCCI = scc_begin(rootNode),
-         E = scc_end(rootNode); SCCI != E; ++SCCI) {
+  errs() << "SCCs for the program in PostOrder:";
+  for (scc_iterator<CallGraph*> SCCI = scc_begin(&CG); !SCCI.isAtEnd();
+       ++SCCI) {
     const std::vector<CallGraphNode*> &nextSCC = *SCCI;
-    std::cout << "\nSCC #" << ++sccNum << " : ";
+    errs() << "\nSCC #" << ++sccNum << " : ";
     for (std::vector<CallGraphNode*>::const_iterator I = nextSCC.begin(),
            E = nextSCC.end(); I != E; ++I)
-      std::cout << ((*I)->getFunction() ? (*I)->getFunction()->getName()
-                    : std::string("Indirect CallGraph node")) << ", ";
+      errs() << ((*I)->getFunction() ? (*I)->getFunction()->getName()
+                                     : "external node") << ", ";
     if (nextSCC.size() == 1 && SCCI.hasLoop())
-      std::cout << " (Has self-loop).";
+      errs() << " (Has self-loop).";
   }
-  std::cout << "\n";
+  errs() << "\n";
 
   return true;
 }