Add support for reading block frequencies. Fix bug in attribution of counts

to functions

llvm-svn: 9559
This commit is contained in:
Chris Lattner 2003-10-28 21:25:23 +00:00
parent b7c3b6dc4d
commit 2091cc4310
3 changed files with 48 additions and 2 deletions

View File

@ -148,7 +148,28 @@ void ProfileInfo::getFunctionCounts(std::vector<std::pair<Function*,
unsigned Counter = 0;
for (Module::iterator I = M.begin(), E = M.end();
I != E && Counter != FunctionCounts.size(); ++I, ++Counter)
I != E && Counter != FunctionCounts.size(); ++I)
if (!I->isExternal())
Counts.push_back(std::make_pair(I, FunctionCounts[Counter]));
Counts.push_back(std::make_pair(I, FunctionCounts[Counter++]));
}
// getBlockCounts - This method is used by consumers of block counting
// information. If we do not directly have block count information, we
// compute it from other, more refined, types of profile information.
//
void ProfileInfo::getBlockCounts(std::vector<std::pair<BasicBlock*,
unsigned> > &Counts) {
if (BlockCounts.empty()) {
std::cerr << "Block counts not available, and no synthesis "
<< "is implemented yet!\n";
return;
}
unsigned Counter = 0;
for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F)
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
Counts.push_back(std::make_pair(BB, BlockCounts[Counter++]));
if (Counter == BlockCounts.size())
return;
}
}

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@ -20,6 +20,7 @@
#include <utility>
class Module;
class Function;
class BasicBlock;
class ProfileInfo {
Module &M;
@ -37,6 +38,18 @@ public:
//
void getFunctionCounts(std::vector<std::pair<Function*, unsigned> > &Counts);
// hasAccurateBlockCounts - Return true if we can synthesize accurate block
// frequency information from whatever we have.
//
bool hasAccurateBlockCounts() const {
return !BlockCounts.empty();
}
// getBlockCounts - This method is used by consumers of block counting
// information. If we do not directly have block count information, we
// compute it from other, more refined, types of profile information.
//
void getBlockCounts(std::vector<std::pair<BasicBlock*, unsigned> > &Counts);
};
#endif

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@ -19,6 +19,7 @@
#include "Support/CommandLine.h"
#include <iostream>
#include <cstdio>
#include <map>
namespace {
cl::opt<std::string>
@ -77,5 +78,16 @@ int main(int argc, char **argv) {
for (unsigned i = 0, e = FunctionCounts.size(); i != e; ++i)
printf("%3d. %5d/%d %s\n", i, FunctionCounts[i].second, TotalExecutions,
FunctionCounts[i].first->getName().c_str());
// 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);
std::map<BasicBlock*, unsigned> BlockFreqs(Counts.begin(), Counts.end());
}
return 0;
}