//===----------------------------------------------------------------------===//
#include "ProfileInfo.h"
-#include "llvm/Function.h"
+#include "llvm/Module.h"
+#include "llvm/Assembly/AsmAnnotationWriter.h"
#include "llvm/Bytecode/Reader.h"
#include "Support/CommandLine.h"
#include <iostream>
#include <cstdio>
+#include <map>
+#include <set>
+
+using namespace llvm;
namespace {
cl::opt<std::string>
cl::opt<std::string>
ProfileDataFile(cl::Positional, cl::desc("<llvmprof.out file>"),
cl::Optional, cl::init("llvmprof.out"));
+
+ cl::opt<bool>
+ PrintAnnotatedLLVM("annotated-llvm",
+ cl::desc("Print LLVM code with frequency annotations"));
+ cl::alias PrintAnnotated2("A", cl::desc("Alias for --annotated-llvm"),
+ cl::aliasopt(PrintAnnotatedLLVM));
+ cl::opt<bool>
+ PrintAllCode("print-all-code",
+ cl::desc("Print annotated code for the entire program"));
}
// PairSecondSort - A sorting predicate to sort by the second element of a pair.
template<class T>
-struct PairSecondSort
+struct PairSecondSortReverse
: public std::binary_function<std::pair<T, unsigned>,
std::pair<T, unsigned>, bool> {
bool operator()(const std::pair<T, unsigned> &LHS,
const std::pair<T, unsigned> &RHS) const {
- return LHS.second < RHS.second;
+ return LHS.second > RHS.second;
}
};
+namespace {
+ class ProfileAnnotator : public AssemblyAnnotationWriter {
+ std::map<const Function *, unsigned> &FuncFreqs;
+ std::map<const BasicBlock*, unsigned> &BlockFreqs;
+ public:
+ ProfileAnnotator(std::map<const Function *, unsigned> &FF,
+ std::map<const BasicBlock*, unsigned> &BF)
+ : FuncFreqs(FF), BlockFreqs(BF) {}
+
+ virtual void emitFunctionAnnot(const Function *F, std::ostream &OS) {
+ OS << ";;; %" << F->getName() << " called " << FuncFreqs[F]
+ << " times.\n;;;\n";
+ }
+ virtual void emitBasicBlockAnnot(const BasicBlock *BB, std::ostream &OS) {
+ if (BlockFreqs.empty()) return;
+ if (unsigned Count = BlockFreqs[BB])
+ OS << ";;; Executed " << Count << " times.\n";
+ else
+ OS << ";;; Never executed!\n";
+ }
+ };
+}
+
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, " llvm profile dump decoder\n");
// Read the profiling information
ProfileInfo PI(argv[0], ProfileDataFile, *M);
+ std::map<const Function *, unsigned> FuncFreqs;
+ std::map<const BasicBlock*, unsigned> BlockFreqs;
+
// Output a report. Eventually, there will be multiple reports selectable on
// the command line, for now, just keep things simple.
// Emit the most frequent function table...
std::vector<std::pair<Function*, unsigned> > FunctionCounts;
PI.getFunctionCounts(FunctionCounts);
+ FuncFreqs.insert(FunctionCounts.begin(), FunctionCounts.end());
// Sort by the frequency, backwards.
std::sort(FunctionCounts.begin(), FunctionCounts.end(),
- std::not2(PairSecondSort<Function*>()));
+ PairSecondSortReverse<Function*>());
- unsigned TotalExecutions = 0;
+ unsigned long long TotalExecutions = 0;
for (unsigned i = 0, e = FunctionCounts.size(); i != e; ++i)
TotalExecutions += FunctionCounts[i].second;
+ std::cout << "===" << std::string(73, '-') << "===\n"
+ << "LLVM profiling output for execution";
+ if (PI.getNumExecutions() != 1) std::cout << "s";
+ std::cout << ":\n";
+
+ for (unsigned i = 0, e = PI.getNumExecutions(); i != e; ++i) {
+ std::cout << " ";
+ if (e != 1) std::cout << i+1 << ". ";
+ std::cout << PI.getExecution(i) << "\n";
+ }
+
+ std::cout << "\n===" << std::string(73, '-') << "===\n";
+ std::cout << "Function execution frequencies:\n\n";
+
// Print out the function frequencies...
printf(" ## Frequency\n");
- for (unsigned i = 0, e = FunctionCounts.size(); i != e; ++i)
- printf("%3d. %5d/%d %s\n", i, FunctionCounts[i].second, TotalExecutions,
+ for (unsigned i = 0, e = FunctionCounts.size(); i != e; ++i) {
+ if (FunctionCounts[i].second == 0) {
+ printf("\n NOTE: %d function%s never executed!\n",
+ e-i, e-i-1 ? "s were" : " was");
+ break;
+ }
+
+ printf("%3d. %5u/%llu %s\n", i+1, FunctionCounts[i].second, TotalExecutions,
FunctionCounts[i].first->getName().c_str());
+ }
+
+ std::set<Function*> FunctionsToPrint;
+
+ // If we have block count information, print out the LLVM module with
+ // frequency annotations.
+ if (PI.hasAccurateBlockCounts()) {
+ std::vector<std::pair<BasicBlock*, unsigned> > Counts;
+ PI.getBlockCounts(Counts);
+
+ TotalExecutions = 0;
+ for (unsigned i = 0, e = Counts.size(); i != e; ++i)
+ TotalExecutions += Counts[i].second;
+
+ // Sort by the frequency, backwards.
+ std::sort(Counts.begin(), Counts.end(),
+ PairSecondSortReverse<BasicBlock*>());
+
+ std::cout << "\n===" << std::string(73, '-') << "===\n";
+ std::cout << "Top 20 most frequently executed basic blocks:\n\n";
+
+ // Print out the function frequencies...
+ printf(" ## %%%% \tFrequency\n");
+ unsigned BlocksToPrint = Counts.size();
+ if (BlocksToPrint > 20) BlocksToPrint = 20;
+ for (unsigned i = 0; i != BlocksToPrint; ++i) {
+ if (Counts[i].second == 0) break;
+ Function *F = Counts[i].first->getParent();
+ printf("%3d. %5.2f%% %5u/%llu\t%s() - %s\n", i+1,
+ Counts[i].second/(double)TotalExecutions*100,
+ Counts[i].second, TotalExecutions,
+ F->getName().c_str(), Counts[i].first->getName().c_str());
+ FunctionsToPrint.insert(F);
+ }
+
+ BlockFreqs.insert(Counts.begin(), Counts.end());
+ }
+
+ if (PrintAnnotatedLLVM || PrintAllCode) {
+ std::cout << "\n===" << std::string(73, '-') << "===\n";
+ std::cout << "Annotated LLVM code for the module:\n\n";
+
+ ProfileAnnotator PA(FuncFreqs, BlockFreqs);
+
+ if (FunctionsToPrint.empty() || PrintAllCode)
+ M->print(std::cout, &PA);
+ else
+ // Print just a subset of the functions...
+ for (std::set<Function*>::iterator I = FunctionsToPrint.begin(),
+ E = FunctionsToPrint.end(); I != E; ++I)
+ (*I)->print(std::cout, &PA);
+ }
+
return 0;
}
projects / oota-llvm.git / blobdiff