search for: getblockprofilecount

...InfoWrapperPass>(F);     llvm::BlockFrequencyInfo* BFI = &bfiPass.getBFI();     //Works - shows all info I want     BFI->print(llvm::dbgs());     for (const llvm::BasicBlock& B : F) {         //Fails with SIGSEGV -> *getFunction() returns 0xa         dbgs() << BFI->getBlockProfileCount(&B).getValueOr(0) << "\n";     } } lib/Analysis/BlockFrequencyInfo.cpp#L211 return BFI->getBlockProfileCount(*getFunction(), BB);

...llowing queries. >> >> - How do I use the edge count and branch weights data obtained using >> PGOInstrumentationUse in my pass and replace the *getEdgeWeight()* >> from ProfileInfo? >> >> > You can do > BPI.getEdgeProbability(Src, Dest).scale(BFI.getBlockProfileCount(Src)); > I tried doing this but there are some semantic issues that I'm facing. There is a loop in my program which I know is a hot loop since it is the only loop inside the function main() and essentially, all the computations are performed within this function via function calls. However,...

...use the edge count and branch weights data obtained >>>> using PGOInstrumentationUse in my pass and replace the >>>> *getEdgeWeight()* from ProfileInfo? >>>> >>>> >>> You can do >>> BPI.getEdgeProbability(Src, Dest).scale(BFI.getBlockProfileCount(Src)); >>> >> >> I tried doing this but there are some semantic issues that I'm facing. >> There is a loop in my program which I know is a hot loop since it is the >> only loop inside the function main() and essentially, all the computations >> are perform...

...yInfoWrapperPass >();au.addRequired< BranchProbabilityInfoWrapperPass >();* Now, I have the following queries. - How do I use the edge count and branch weights data obtained using PGOInstrumentationUse in my pass and replace the *getEdgeWeight()* from ProfileInfo? - If I call *getBlockProfileCount() *from the BlockFrequency pass, will that give me the data read during PGOInstrumentationUse or data based on static analysis? In other words, does the data obtained during PGOInstrumentationUse "propagate" to BlockFrequency and BranchProbability? Thank you. Regards, Malhar...

...the program's execution time spent in this block". Currently, I'm computing this using the block's frequency from BlockFrequencyInfo, relative to the function's entry block frequency, and scaled by the function's entry count. This is also the computation that's done by getBlockProfileCount <https://github.com/llvm-mirror/llvm/blob/master/lib/Analysis/BlockFrequencyInfoImpl.cpp#L540> in lib/Analysis/BlockFrequencyInfoImpl.cpp. The problem is that this method can be extremely imprecise, because many functions have an entry count of zero. The entry count is computed from the numb...

> On Apr 18, 2016, at 2:07 PM, Hal Finkel via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > ----- Original Message ----- >> From: "Easwaran Raman" <eraman at google.com> >> To: "via llvm-dev" <llvm-dev at lists.llvm.org> >> Cc: "Chandler Carruth" <chandlerc at gmail.com>, "Hal Finkel" <hfinkel at

...for (auto &F : M) { + if (F.isDeclaration()) + continue; + getAnalysis<BranchProbabilityInfoWrapperPass>(F).getBPI(); + auto &BFI = getAnalysis<BlockFrequencyInfoWrapperPass>(F).getBFI(); + for (auto &BB : F) { + Optional<uint64_t> BBCount = BFI.getBlockProfileCount(&BB); + if (!BBCount) + continue; + for (auto &I : BB) { + auto *CI = dyn_cast<CallInst>(&I); + if (!CI) + continue; + Function *CalledF = CI->getCalledFunction(); + if (!CalledF || CalledF->isIntrinsic()) + cont...