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Switch to using edge profiling information as the basic source of profile info

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from using basic block counts.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12242 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-03-08 22:04:08 +00:00
parent 7d84dda560
commit 96ab5caf2d
2 changed files with 73 additions and 5 deletions
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26
lib/Analysis/ProfileInfoLoaderPass.cpp
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@@ -12,6 +12,8 @@
//
//===----------------------------------------------------------------------===//
#include "llvm/BasicBlock.h"
#include "llvm/InstrTypes.h"
#include "llvm/Pass.h"
#include "llvm/Analysis/ProfileInfo.h"
#include "llvm/Analysis/ProfileInfoLoader.h"
@@ -60,11 +62,25 @@ Pass *llvm::createProfileLoaderPass(const std::string &Filename) {
bool LoaderPass::run(Module &M) {
ProfileInfoLoader PIL("profile-loader", Filename, M);
ExecutionCounts.clear();
if (PIL.hasAccurateBlockCounts()) {
std::vector<std::pair<BasicBlock*, unsigned> > Counts;
PIL.getBlockCounts(Counts);
ExecutionCounts.insert(Counts.begin(), Counts.end());
EdgeCounts.clear();
bool PrintedWarning = false;
std::vector<std::pair<ProfileInfoLoader::Edge, unsigned> > ECs;
PIL.getEdgeCounts(ECs);
for (unsigned i = 0, e = ECs.size(); i != e; ++i) {
BasicBlock *BB = ECs[i].first.first;
unsigned SuccNum = ECs[i].first.second;
TerminatorInst *TI = BB->getTerminator();
if (SuccNum >= TI->getNumSuccessors()) {
if (!PrintedWarning) {
std::cerr << "WARNING: profile information is inconsistent with "
<< "the current program!\n";
PrintedWarning = true;
}
} else {
EdgeCounts[std::make_pair(BB, TI->getSuccessor(SuccNum))]+= ECs[i].second;
}
}
return false;
}