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More ProfileInfo improvements.

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- Part of optimal static profiling patch sequence by Andreas Neustifter.

 - Store edge, block, and function information separately for each functions
   (instead of in one giant map).

 - Return frequencies as double instead of int, and use a sentinel value for
   missing information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78477 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar
2009-08-08 17:43:09 +00:00
parent 3e0094d969
commit caaa49336b
7 changed files with 157 additions and 91 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
tools/llvm-prof/llvm-prof.cpp
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@ -66,6 +66,11 @@ struct PairSecondSortReverse
}
};
static double ignoreMissing(double w) {
if (w == ProfileInfo::MissingValue) return 0;
return w;
}
namespace {
class ProfileAnnotator : public AssemblyAnnotationWriter {
ProfileInfo Π
@ -73,16 +78,24 @@ namespace {
ProfileAnnotator(ProfileInfo& pi) : PI(pi) {}
virtual void emitFunctionAnnot(const Function *F, raw_ostream &OS) {
OS << ";;; %" << F->getName() << " called " << PI.getExecutionCount(F)
<< " times.\n;;;\n";
OS << ";;; %" << F->getName() << " called ";
double w = PI.getExecutionCount(F);
if (w == ProfileInfo::MissingValue)
OS << "(no value)";
else
OS << (unsigned)w;
OS << " times.\n;;;\n";
}
virtual void emitBasicBlockStartAnnot(const BasicBlock *BB,
raw_ostream &OS) {
unsigned w = PI.getExecutionCount(BB);
if (w != 0)
OS << "\t;;; Basic block executed " << w << " times.\n";
double w = PI.getExecutionCount(BB);
if (w == ProfileInfo::MissingValue)
OS << "\t;;; (no value)\n";
else
OS << "\t;;; Never executed!\n";
if (w != 0)
OS << "\t;;; Basic block executed " << w << " times.\n";
else
OS << "\t;;; Never executed!\n";
}
virtual void emitBasicBlockEndAnnot(const BasicBlock *BB, raw_ostream &OS) {
@ -92,8 +105,8 @@ namespace {
const TerminatorInst *TI = BB->getTerminator();
for (unsigned s = 0, e = TI->getNumSuccessors(); s != e; ++s) {
BasicBlock* Succ = TI->getSuccessor(s);
SuccCounts.push_back(std::make_pair(std::make_pair(BB,Succ),
PI.getEdgeWeight(BB,Succ)));
double w = ignoreMissing(PI.getEdgeWeight(std::make_pair(BB,Succ)));
SuccCounts.push_back(std::make_pair(std::make_pair(BB,Succ), w));
}
if (!SuccCounts.empty()) {
OS << "\t;;; Out-edge counts:";
@ -143,10 +156,12 @@ bool ProfileInfoPrinterPass::runOnModule(Module &M) {
std::vector<std::pair<BasicBlock*, unsigned> > Counts;
for (Module::iterator FI = M.begin(), FE = M.end(); FI != FE; ++FI) {
if (FI->isDeclaration()) continue;
FunctionCounts.push_back(std::make_pair(FI,PI.getExecutionCount(FI)));
double w = ignoreMissing(PI.getExecutionCount(FI));
FunctionCounts.push_back(std::make_pair(FI,w));
for (Function::iterator BB = FI->begin(), BBE = FI->end();
BB != BBE; ++BB) {
Counts.push_back(std::make_pair(BB,PI.getExecutionCount(BB)));
double w = ignoreMissing(PI.getExecutionCount(BB));
Counts.push_back(std::make_pair(BB,w));
}
}