#include "llvm/Analysis/ProfileInfo.h"
#include "llvm/Analysis/ProfileInfoLoader.h"
#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Compiler.h"
#include "llvm/Support/CFG.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
cl::desc("Profile file loaded by -profile-loader"));
namespace {
- class VISIBILITY_HIDDEN LoaderPass : public ModulePass, public ProfileInfo {
+ class LoaderPass : public ModulePass, public ProfileInfo {
std::string Filename;
std::set<Edge> SpanningTree;
std::set<const BasicBlock*> BBisUnvisited;
+ unsigned ReadCount;
public:
static char ID; // Class identification, replacement for typeinfo
explicit LoaderPass(const std::string &filename = "")
// recurseBasicBlock() - Calculates the edge weights for as much basic
// blocks as possbile.
virtual void recurseBasicBlock(const BasicBlock *BB);
- virtual void readEdgeOrRemember(Edge, Edge&, unsigned &, unsigned &);
- virtual void readOrRememberEdge(ProfileInfo::Edge, unsigned,
- unsigned, Function*);
+ virtual void readEdgeOrRemember(Edge, Edge&, unsigned &, double &);
+ virtual void readEdge(ProfileInfo::Edge, std::vector<unsigned>&);
/// run - Load the profile information from the specified file.
virtual bool runOnModule(Module &M);
static RegisterAnalysisGroup<ProfileInfo> Y(X);
+const PassInfo *llvm::ProfileLoaderPassID = &X;
+
ModulePass *llvm::createProfileLoaderPass() { return new LoaderPass(); }
/// createProfileLoaderPass - This function returns a Pass that loads the
}
void LoaderPass::readEdgeOrRemember(Edge edge, Edge &tocalc,
- unsigned &uncalc, unsigned &count) {
+ unsigned &uncalc, double &count) {
double w;
if ((w = getEdgeWeight(edge)) == MissingValue) {
tocalc = edge;
recurseBasicBlock(*bbi);
}
- Edge edgetocalc;
- unsigned uncalculated = 0;
-
- // collect weights of all incoming and outgoing edges, rememer edges that
- // have no value
- unsigned incount = 0;
- SmallSet<const BasicBlock*,8> pred_visited;
- pred_const_iterator bbi = pred_begin(BB), bbe = pred_end(BB);
- if (bbi==bbe) {
- readEdgeOrRemember(getEdge(0, BB),edgetocalc,uncalculated,incount);
- }
- for (;bbi != bbe; ++bbi) {
- if (pred_visited.insert(*bbi)) {
- readEdgeOrRemember(getEdge(*bbi, BB),edgetocalc,uncalculated,incount);
- }
+ Edge tocalc;
+ if (CalculateMissingEdge(BB, tocalc)) {
+ SpanningTree.erase(tocalc);
}
+}
- unsigned outcount = 0;
- SmallSet<const BasicBlock*,8> succ_visited;
- succ_const_iterator sbbi = succ_begin(BB), sbbe = succ_end(BB);
- if (sbbi==sbbe) {
- readEdgeOrRemember(getEdge(BB, 0),edgetocalc,uncalculated,outcount);
- }
- for (;sbbi != sbbe; ++sbbi) {
- if (succ_visited.insert(*sbbi)) {
- readEdgeOrRemember(getEdge(BB, *sbbi),edgetocalc,uncalculated,outcount);
- }
- }
+void LoaderPass::readEdge(ProfileInfo::Edge e,
+ std::vector<unsigned> &ECs) {
+ if (ReadCount < ECs.size()) {
+ double weight = ECs[ReadCount++];
+ if (weight != ProfileInfoLoader::Uncounted) {
+ // Here the data realm changes from the unsigned of the file to the
+ // double of the ProfileInfo. This conversion is save because we know
+ // that everything thats representable in unsinged is also representable
+ // in double.
+ EdgeInformation[getFunction(e)][e] += (double)weight;
- // if exactly one edge weight was missing, calculate it and remove it from
- // spanning tree
- if (uncalculated == 1) {
- if (incount < outcount) {
- EdgeInformation[BB->getParent()][edgetocalc] = outcount-incount;
+ DEBUG(errs() << "--Read Edge Counter for " << e
+ << " (# "<< (ReadCount-1) << "): "
+ << (unsigned)getEdgeWeight(e) << "\n");
} else {
- EdgeInformation[BB->getParent()][edgetocalc] = incount-outcount;
+ // This happens only if reading optimal profiling information, not when
+ // reading regular profiling information.
+ SpanningTree.insert(e);
}
- DEBUG(errs() << "--Calc Edge Counter for " << edgetocalc << ": "
- << format("%g", getEdgeWeight(edgetocalc)) << "\n");
- SpanningTree.erase(edgetocalc);
- }
-}
-
-void LoaderPass::readOrRememberEdge(ProfileInfo::Edge e,
- unsigned weight, unsigned ei,
- Function *F) {
- if (weight != ProfileInfoLoader::Uncounted) {
- // Here the data realm changes from the unsigned of the file to the double
- // of the ProfileInfo. This conversion is save because we know that
- // everything thats representable in unsinged is also representable in
- // double.
- EdgeInformation[F][e] += (double)weight;
- DEBUG(errs()<<"--Read Edge Counter for " << e
- <<" (# "<<ei<<"): "<<(unsigned)getEdgeWeight(e)<<"\n");
- } else {
- SpanningTree.insert(e);
}
}
ProfileInfoLoader PIL("profile-loader", Filename, M);
EdgeInformation.clear();
- std::vector<unsigned> ECs = PIL.getRawEdgeCounts();
- if (ECs.size() > 0) {
- unsigned ei = 0;
+ std::vector<unsigned> Counters = PIL.getRawEdgeCounts();
+ if (Counters.size() > 0) {
+ ReadCount = 0;
for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
if (F->isDeclaration()) continue;
- if (ei < ECs.size())
- // Here the data realm changes from the unsigned of the file to the
- // double of the ProfileInfo. This conversion is save because we know
- // that everything thats representable in unsinged is also
- // representable in double.
- EdgeInformation[F][ProfileInfo::getEdge(0, &F->getEntryBlock())] +=
- (double)ECs[ei++];
+ DEBUG(errs()<<"Working on "<<F->getNameStr()<<"\n");
+ readEdge(getEdge(0,&F->getEntryBlock()), Counters);
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
- // Okay, we have to add a counter of each outgoing edge. If the
- // outgoing edge is not critical don't split it, just insert the counter
- // in the source or destination of the edge.
TerminatorInst *TI = BB->getTerminator();
for (unsigned s = 0, e = TI->getNumSuccessors(); s != e; ++s) {
- if (ei < ECs.size())
- // Here the data realm changes from the unsigned of the file to
- // the double of the ProfileInfo.
- EdgeInformation[F][ProfileInfo::getEdge(BB, TI->getSuccessor(s))] +=
- (double)ECs[ei++];
+ readEdge(getEdge(BB,TI->getSuccessor(s)), Counters);
}
}
}
- if (ei != ECs.size()) {
+ if (ReadCount != Counters.size()) {
errs() << "WARNING: profile information is inconsistent with "
<< "the current program!\n";
}
- NumEdgesRead = ei;
+ NumEdgesRead = ReadCount;
}
- ECs = PIL.getRawOptimalEdgeCounts();
- if (ECs.size() > 0) {
- unsigned ei = 0;
+ Counters = PIL.getRawOptimalEdgeCounts();
+ if (Counters.size() > 0) {
+ ReadCount = 0;
for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
if (F->isDeclaration()) continue;
DEBUG(errs()<<"Working on "<<F->getNameStr()<<"\n");
- if (ei < ECs.size()) {
- readOrRememberEdge(getEdge(0,&F->getEntryBlock()), ECs[ei], ei, F);
- ei++;
- }
+ readEdge(getEdge(0,&F->getEntryBlock()), Counters);
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
TerminatorInst *TI = BB->getTerminator();
if (TI->getNumSuccessors() == 0) {
- if (ei < ECs.size()) {
- readOrRememberEdge(getEdge(BB,0), ECs[ei], ei, F); ei++;
- }
+ readEdge(getEdge(BB,0), Counters);
}
for (unsigned s = 0, e = TI->getNumSuccessors(); s != e; ++s) {
- if (ei < ECs.size()) {
- readOrRememberEdge(getEdge(BB,TI->getSuccessor(s)), ECs[ei], ei, F);
- ei++;
- }
+ readEdge(getEdge(BB,TI->getSuccessor(s)), Counters);
}
}
while (SpanningTree.size() > 0) {
-#if 0
+
unsigned size = SpanningTree.size();
-#endif
+
BBisUnvisited.clear();
for (std::set<Edge>::iterator ei = SpanningTree.begin(),
ee = SpanningTree.end(); ei != ee; ++ei) {
while (BBisUnvisited.size() > 0) {
recurseBasicBlock(*BBisUnvisited.begin());
}
-#if 0
+
if (SpanningTree.size() == size) {
DEBUG(errs()<<"{");
for (std::set<Edge>::iterator ei = SpanningTree.begin(),
ee = SpanningTree.end(); ei != ee; ++ei) {
- DEBUG(errs()<<"("<<(ei->first?ei->first->getName():"0")<<","
- <<(ei->second?ei->second->getName():"0")<<"),");
+ DEBUG(errs()<< *ei <<",");
}
assert(0 && "No edge calculated!");
}
-#endif
+
}
}
- if (ei != ECs.size()) {
+ if (ReadCount != Counters.size()) {
errs() << "WARNING: profile information is inconsistent with "
<< "the current program!\n";
}
- NumEdgesRead = ei;
+ NumEdgesRead = ReadCount;
}
BlockInformation.clear();
- std::vector<unsigned> BCs = PIL.getRawBlockCounts();
- if (BCs.size() > 0) {
- unsigned bi = 0;
+ Counters = PIL.getRawBlockCounts();
+ if (Counters.size() > 0) {
+ ReadCount = 0;
for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
if (F->isDeclaration()) continue;
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB)
- if (bi < BCs.size())
+ if (ReadCount < Counters.size())
// Here the data realm changes from the unsigned of the file to the
// double of the ProfileInfo. This conversion is save because we know
// that everything thats representable in unsinged is also
// representable in double.
- BlockInformation[F][BB] = (double)BCs[bi++];
+ BlockInformation[F][BB] = (double)Counters[ReadCount++];
}
- if (bi != BCs.size()) {
+ if (ReadCount != Counters.size()) {
errs() << "WARNING: profile information is inconsistent with "
<< "the current program!\n";
}
}
FunctionInformation.clear();
- std::vector<unsigned> FCs = PIL.getRawFunctionCounts();
- if (FCs.size() > 0) {
- unsigned fi = 0;
+ Counters = PIL.getRawFunctionCounts();
+ if (Counters.size() > 0) {
+ ReadCount = 0;
for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
if (F->isDeclaration()) continue;
- if (fi < FCs.size())
+ if (ReadCount < Counters.size())
// Here the data realm changes from the unsigned of the file to the
// double of the ProfileInfo. This conversion is save because we know
// that everything thats representable in unsinged is also
// representable in double.
- FunctionInformation[F] = (double)FCs[fi++];
+ FunctionInformation[F] = (double)Counters[ReadCount++];
}
- if (fi != FCs.size()) {
+ if (ReadCount != Counters.size()) {
errs() << "WARNING: profile information is inconsistent with "
<< "the current program!\n";
}
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