//===- ProfileInfo.cpp - Profile Info Interface ---------------------------===//
-//
+//
// 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 the abstract ProfileInfo interface, and the default
//
//===----------------------------------------------------------------------===//
+#include "llvm/Analysis/Passes.h"
#include "llvm/Analysis/ProfileInfo.h"
#include "llvm/Pass.h"
+#include "llvm/Support/CFG.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/raw_ostream.h"
+#include <set>
using namespace llvm;
-// Register the AliasAnalysis interface, providing a nice name to refer to.
-namespace {
- RegisterAnalysisGroup<ProfileInfo> Z("Profile Information");
-}
+// Register the ProfileInfo interface, providing a nice name to refer to.
+static RegisterAnalysisGroup<ProfileInfo> Z("Profile Information");
+char ProfileInfo::ID = 0;
ProfileInfo::~ProfileInfo() {}
+const double ProfileInfo::MissingValue = -1;
+
+double ProfileInfo::getExecutionCount(const BasicBlock *BB) {
+ std::map<const Function*, BlockCounts>::iterator J =
+ BlockInformation.find(BB->getParent());
+ if (J != BlockInformation.end()) {
+ BlockCounts::iterator I = J->second.find(BB);
+ if (I != J->second.end())
+ return I->second;
+ }
+
+ pred_const_iterator PI = pred_begin(BB), PE = pred_end(BB);
+
+ // Are there zero predecessors of this block?
+ if (PI == PE) {
+ // If this is the entry block, look for the Null -> Entry edge.
+ if (BB == &BB->getParent()->getEntryBlock())
+ return getEdgeWeight(getEdge(0, BB));
+ else
+ return 0; // Otherwise, this is a dead block.
+ }
+
+ // Otherwise, if there are predecessors, the execution count of this block is
+ // the sum of the edge frequencies from the incoming edges.
+ std::set<const BasicBlock*> ProcessedPreds;
+ double Count = 0;
+ for (; PI != PE; ++PI)
+ if (ProcessedPreds.insert(*PI).second) {
+ double w = getEdgeWeight(getEdge(*PI, BB));
+ if (w == MissingValue) {
+ Count = MissingValue;
+ break;
+ }
+ Count += w;
+ }
+
+ if (Count != MissingValue) BlockInformation[BB->getParent()][BB] = Count;
+ return Count;
+}
+
+double ProfileInfo::getExecutionCount(const Function *F) {
+ std::map<const Function*, double>::iterator J =
+ FunctionInformation.find(F);
+ if (J != FunctionInformation.end())
+ return J->second;
+
+ // isDeclaration() is checked here and not at start of function to allow
+ // functions without a body still to have a execution count.
+ if (F->isDeclaration()) return MissingValue;
+
+ double Count = getExecutionCount(&F->getEntryBlock());
+ if (Count != MissingValue) FunctionInformation[F] = Count;
+ return Count;
+}
+
+raw_ostream& llvm::operator<<(raw_ostream &O, ProfileInfo::Edge E) {
+ O << "(";
+ O << (E.first ? E.first->getNameStr() : "0");
+ O << ",";
+ O << (E.second ? E.second->getNameStr() : "0");
+ return O << ")";
+}
//===----------------------------------------------------------------------===//
// NoProfile ProfileInfo implementation
//
namespace {
- struct NoProfileInfo : public ImmutablePass, public ProfileInfo {
- unsigned getExecutionCount(BasicBlock *BB) { return 0; }
+ struct VISIBILITY_HIDDEN NoProfileInfo
+ : public ImmutablePass, public ProfileInfo {
+ static char ID; // Class identification, replacement for typeinfo
+ NoProfileInfo() : ImmutablePass(&ID) {}
};
-
- // Register this pass...
- RegisterOpt<NoProfileInfo>
- X("no-profile", "No Profile Information");
-
- // Declare that we implement the AliasAnalysis interface
- RegisterAnalysisGroup<ProfileInfo, NoProfileInfo, true> Y;
} // End of anonymous namespace
+
+char NoProfileInfo::ID = 0;
+// Register this pass...
+static RegisterPass<NoProfileInfo>
+X("no-profile", "No Profile Information", false, true);
+
+// Declare that we implement the ProfileInfo interface
+static RegisterAnalysisGroup<ProfileInfo, true> Y(X);
+
+ImmutablePass *llvm::createNoProfileInfoPass() { return new NoProfileInfo(); }