Use clear() to zero an existing APInt.

[oota-llvm.git] / lib / Analysis / ProfileInfoLoaderPass.cpp

diff --git a/lib/Analysis/ProfileInfoLoaderPass.cpp b/lib/Analysis/ProfileInfoLoaderPass.cpp
index be956698793c5b4b0c51ece2001407d4a3cdd50a..b2fa9e45e71759d85979c8794a2cc0165fc90b40 100644 (file)
--- a/lib/Analysis/ProfileInfoLoaderPass.cpp
+++ b/lib/Analysis/ProfileInfoLoaderPass.cpp
@@ -1,10 +1,10 @@
 //===- ProfileInfoLoaderPass.cpp - LLVM Pass to load profile info ---------===//
-// 
+//
 //                     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.
+//
 //===----------------------------------------------------------------------===//
 //
 // This file implements a concrete implementation of profiling information that
@@ -12,23 +12,29 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/BasicBlock.h"
+#include "llvm/InstrTypes.h"
 #include "llvm/Pass.h"
+#include "llvm/Analysis/Passes.h"
 #include "llvm/Analysis/ProfileInfo.h"
 #include "llvm/Analysis/ProfileInfoLoader.h"
-#include "Support/CommandLine.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/Streams.h"
 using namespace llvm;
 
-namespace {
-  cl::opt<std::string>
-  ProfileInfoFilename("profile-info-file", cl::init("llvmprof.out"),
-                      cl::desc(""));
+static cl::opt<std::string>
+ProfileInfoFilename("profile-info-file", cl::init("llvmprof.out"),
+                    cl::value_desc("filename"),
+                    cl::desc("Profile file loaded by -profile-loader"));
 
-  class LoaderPass : public Pass, public ProfileInfo {
+namespace {
+  class VISIBILITY_HIDDEN LoaderPass : public ModulePass, public ProfileInfo {
     std::string Filename;
-    std::map<BasicBlock*, unsigned> ExecutionCounts;
   public:
-    LoaderPass(const std::string &filename = "")
-      : Filename(filename) {
+    static char ID; // Class identification, replacement for typeinfo
+    explicit LoaderPass(const std::string &filename = "")
+      : ModulePass((intptr_t)&ID), Filename(filename) {
       if (filename.empty()) Filename = ProfileInfoFilename;
     }
 
@@ -41,20 +47,17 @@ namespace {
     }
 
     /// run - Load the profile information from the specified file.
-    virtual bool run(Module &M);
-
-    virtual unsigned getExecutionCount(BasicBlock *BB) {
-      std::map<BasicBlock*, unsigned>::iterator I = ExecutionCounts.find(BB);
-      return I != ExecutionCounts.end() ? I->second : 0;
-    }
+    virtual bool runOnModule(Module &M);
   };
- 
-  RegisterOpt<LoaderPass>
-  X("profile-loader", "Load profile information from llvmprof.out");
-
-  RegisterAnalysisGroup<ProfileInfo, LoaderPass> Y;
 }  // End of anonymous namespace
 
+char LoaderPass::ID = 0;
+static RegisterPass<LoaderPass>
+X("profile-loader", "Load profile information from llvmprof.out", false, true);
+
+static RegisterAnalysisGroup<ProfileInfo> Y(X);
+
+ModulePass *llvm::createProfileLoaderPass() { return new LoaderPass(); }
 
 /// createProfileLoaderPass - This function returns a Pass that loads the
 /// profiling information for the module from the specified filename, making it
@@ -63,12 +66,27 @@ Pass *llvm::createProfileLoaderPass(const std::string &Filename) {
   return new LoaderPass(Filename);
 }
 
-bool LoaderPass::run(Module &M) {
-  ProfileInfoLoader PIL("opt", Filename, M);
-  if (PIL.hasAccurateBlockCounts()) {
-    std::vector<std::pair<BasicBlock*, unsigned> > Counts;
-    PIL.getBlockCounts(Counts);
-    ExecutionCounts.insert(Counts.begin(), Counts.end());
+bool LoaderPass::runOnModule(Module &M) {
+  ProfileInfoLoader PIL("profile-loader", Filename, M);
+  EdgeCounts.clear();
+  bool PrintedWarning = false;
+
+  std::vector<std::pair<ProfileInfoLoader::Edge, unsigned> > ECs;
+  PIL.getEdgeCounts(ECs);
+  for (unsigned i = 0, e = ECs.size(); i != e; ++i) {
+    BasicBlock *BB = ECs[i].first.first;
+    unsigned SuccNum = ECs[i].first.second;
+    TerminatorInst *TI = BB->getTerminator();
+    if (SuccNum >= TI->getNumSuccessors()) {
+      if (!PrintedWarning) {
+        cerr << "WARNING: profile information is inconsistent with "
+             << "the current program!\n";
+        PrintedWarning = true;
+      }
+    } else {
+      EdgeCounts[std::make_pair(BB, TI->getSuccessor(SuccNum))]+= ECs[i].second;
+    }
   }
+
   return false;
 }