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| author | 2020-08-03 15:06:44 +0000 | |
|---|---|---|
| committer | 2020-08-03 15:06:44 +0000 | |
| commit | b64793999546ed8adebaeebd9d8345d18db8927d (patch) | |
| tree | 4357c27b561d73b0e089727c6ed659f2ceff5f47 /gnu/llvm/lib/Analysis/BlockFrequencyInfo.cpp | |
| parent | Add support for UTF-8 DISPLAY-HINTs with octet length. For now only (diff) | |
| download | wireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.tar.xz wireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.zip | |
Remove LLVM 8.0.1 files.
Diffstat (limited to 'gnu/llvm/lib/Analysis/BlockFrequencyInfo.cpp')
| -rw-r--r-- | gnu/llvm/lib/Analysis/BlockFrequencyInfo.cpp | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/gnu/llvm/lib/Analysis/BlockFrequencyInfo.cpp b/gnu/llvm/lib/Analysis/BlockFrequencyInfo.cpp deleted file mode 100644 index ef27c36517e..00000000000 --- a/gnu/llvm/lib/Analysis/BlockFrequencyInfo.cpp +++ /dev/null @@ -1,342 +0,0 @@ -//===- BlockFrequencyInfo.cpp - Block Frequency Analysis ------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// Loops should be simplified before this analysis. -// -//===----------------------------------------------------------------------===// - -#include "llvm/Analysis/BlockFrequencyInfo.h" -#include "llvm/ADT/APInt.h" -#include "llvm/ADT/None.h" -#include "llvm/ADT/iterator.h" -#include "llvm/Analysis/BlockFrequencyInfoImpl.h" -#include "llvm/Analysis/BranchProbabilityInfo.h" -#include "llvm/Analysis/LoopInfo.h" -#include "llvm/IR/CFG.h" -#include "llvm/IR/Function.h" -#include "llvm/IR/PassManager.h" -#include "llvm/Pass.h" -#include "llvm/Support/CommandLine.h" -#include "llvm/Support/GraphWriter.h" -#include "llvm/Support/raw_ostream.h" -#include <algorithm> -#include <cassert> -#include <string> - -using namespace llvm; - -#define DEBUG_TYPE "block-freq" - -static cl::opt<GVDAGType> ViewBlockFreqPropagationDAG( - "view-block-freq-propagation-dags", cl::Hidden, - cl::desc("Pop up a window to show a dag displaying how block " - "frequencies propagation through the CFG."), - cl::values(clEnumValN(GVDT_None, "none", "do not display graphs."), - clEnumValN(GVDT_Fraction, "fraction", - "display a graph using the " - "fractional block frequency representation."), - clEnumValN(GVDT_Integer, "integer", - "display a graph using the raw " - "integer fractional block frequency representation."), - clEnumValN(GVDT_Count, "count", "display a graph using the real " - "profile count if available."))); - -cl::opt<std::string> - ViewBlockFreqFuncName("view-bfi-func-name", cl::Hidden, - cl::desc("The option to specify " - "the name of the function " - "whose CFG will be displayed.")); - -cl::opt<unsigned> - ViewHotFreqPercent("view-hot-freq-percent", cl::init(10), cl::Hidden, - cl::desc("An integer in percent used to specify " - "the hot blocks/edges to be displayed " - "in red: a block or edge whose frequency " - "is no less than the max frequency of the " - "function multiplied by this percent.")); - -// Command line option to turn on CFG dot or text dump after profile annotation. -cl::opt<PGOViewCountsType> PGOViewCounts( - "pgo-view-counts", cl::Hidden, - cl::desc("A boolean option to show CFG dag or text with " - "block profile counts and branch probabilities " - "right after PGO profile annotation step. The " - "profile counts are computed using branch " - "probabilities from the runtime profile data and " - "block frequency propagation algorithm. To view " - "the raw counts from the profile, use option " - "-pgo-view-raw-counts instead. To limit graph " - "display to only one function, use filtering option " - "-view-bfi-func-name."), - cl::values(clEnumValN(PGOVCT_None, "none", "do not show."), - clEnumValN(PGOVCT_Graph, "graph", "show a graph."), - clEnumValN(PGOVCT_Text, "text", "show in text."))); - -static cl::opt<bool> PrintBlockFreq( - "print-bfi", cl::init(false), cl::Hidden, - cl::desc("Print the block frequency info.")); - -cl::opt<std::string> PrintBlockFreqFuncName( - "print-bfi-func-name", cl::Hidden, - cl::desc("The option to specify the name of the function " - "whose block frequency info is printed.")); - -namespace llvm { - -static GVDAGType getGVDT() { - if (PGOViewCounts == PGOVCT_Graph) - return GVDT_Count; - return ViewBlockFreqPropagationDAG; -} - -template <> -struct GraphTraits<BlockFrequencyInfo *> { - using NodeRef = const BasicBlock *; - using ChildIteratorType = succ_const_iterator; - using nodes_iterator = pointer_iterator<Function::const_iterator>; - - static NodeRef getEntryNode(const BlockFrequencyInfo *G) { - return &G->getFunction()->front(); - } - - static ChildIteratorType child_begin(const NodeRef N) { - return succ_begin(N); - } - - static ChildIteratorType child_end(const NodeRef N) { return succ_end(N); } - - static nodes_iterator nodes_begin(const BlockFrequencyInfo *G) { - return nodes_iterator(G->getFunction()->begin()); - } - - static nodes_iterator nodes_end(const BlockFrequencyInfo *G) { - return nodes_iterator(G->getFunction()->end()); - } -}; - -using BFIDOTGTraitsBase = - BFIDOTGraphTraitsBase<BlockFrequencyInfo, BranchProbabilityInfo>; - -template <> -struct DOTGraphTraits<BlockFrequencyInfo *> : public BFIDOTGTraitsBase { - explicit DOTGraphTraits(bool isSimple = false) - : BFIDOTGTraitsBase(isSimple) {} - - std::string getNodeLabel(const BasicBlock *Node, - const BlockFrequencyInfo *Graph) { - - return BFIDOTGTraitsBase::getNodeLabel(Node, Graph, getGVDT()); - } - - std::string getNodeAttributes(const BasicBlock *Node, - const BlockFrequencyInfo *Graph) { - return BFIDOTGTraitsBase::getNodeAttributes(Node, Graph, - ViewHotFreqPercent); - } - - std::string getEdgeAttributes(const BasicBlock *Node, EdgeIter EI, - const BlockFrequencyInfo *BFI) { - return BFIDOTGTraitsBase::getEdgeAttributes(Node, EI, BFI, BFI->getBPI(), - ViewHotFreqPercent); - } -}; - -} // end namespace llvm - -BlockFrequencyInfo::BlockFrequencyInfo() = default; - -BlockFrequencyInfo::BlockFrequencyInfo(const Function &F, - const BranchProbabilityInfo &BPI, - const LoopInfo &LI) { - calculate(F, BPI, LI); -} - -BlockFrequencyInfo::BlockFrequencyInfo(BlockFrequencyInfo &&Arg) - : BFI(std::move(Arg.BFI)) {} - -BlockFrequencyInfo &BlockFrequencyInfo::operator=(BlockFrequencyInfo &&RHS) { - releaseMemory(); - BFI = std::move(RHS.BFI); - return *this; -} - -// Explicitly define the default constructor otherwise it would be implicitly -// defined at the first ODR-use which is the BFI member in the -// LazyBlockFrequencyInfo header. The dtor needs the BlockFrequencyInfoImpl -// template instantiated which is not available in the header. -BlockFrequencyInfo::~BlockFrequencyInfo() = default; - -bool BlockFrequencyInfo::invalidate(Function &F, const PreservedAnalyses &PA, - FunctionAnalysisManager::Invalidator &) { - // Check whether the analysis, all analyses on functions, or the function's - // CFG have been preserved. - auto PAC = PA.getChecker<BlockFrequencyAnalysis>(); - return !(PAC.preserved() || PAC.preservedSet<AllAnalysesOn<Function>>() || - PAC.preservedSet<CFGAnalyses>()); -} - -void BlockFrequencyInfo::calculate(const Function &F, - const BranchProbabilityInfo &BPI, - const LoopInfo &LI) { - if (!BFI) - BFI.reset(new ImplType); - BFI->calculate(F, BPI, LI); - if (ViewBlockFreqPropagationDAG != GVDT_None && - (ViewBlockFreqFuncName.empty() || - F.getName().equals(ViewBlockFreqFuncName))) { - view(); - } - if (PrintBlockFreq && - (PrintBlockFreqFuncName.empty() || - F.getName().equals(PrintBlockFreqFuncName))) { - print(dbgs()); - } -} - -BlockFrequency BlockFrequencyInfo::getBlockFreq(const BasicBlock *BB) const { - return BFI ? BFI->getBlockFreq(BB) : 0; -} - -Optional<uint64_t> -BlockFrequencyInfo::getBlockProfileCount(const BasicBlock *BB) const { - if (!BFI) - return None; - - return BFI->getBlockProfileCount(*getFunction(), BB); -} - -Optional<uint64_t> -BlockFrequencyInfo::getProfileCountFromFreq(uint64_t Freq) const { - if (!BFI) - return None; - return BFI->getProfileCountFromFreq(*getFunction(), Freq); -} - -bool BlockFrequencyInfo::isIrrLoopHeader(const BasicBlock *BB) { - assert(BFI && "Expected analysis to be available"); - return BFI->isIrrLoopHeader(BB); -} - -void BlockFrequencyInfo::setBlockFreq(const BasicBlock *BB, uint64_t Freq) { - assert(BFI && "Expected analysis to be available"); - BFI->setBlockFreq(BB, Freq); -} - -void BlockFrequencyInfo::setBlockFreqAndScale( - const BasicBlock *ReferenceBB, uint64_t Freq, - SmallPtrSetImpl<BasicBlock *> &BlocksToScale) { - assert(BFI && "Expected analysis to be available"); - // Use 128 bits APInt to avoid overflow. - APInt NewFreq(128, Freq); - APInt OldFreq(128, BFI->getBlockFreq(ReferenceBB).getFrequency()); - APInt BBFreq(128, 0); - for (auto *BB : BlocksToScale) { - BBFreq = BFI->getBlockFreq(BB).getFrequency(); - // Multiply first by NewFreq and then divide by OldFreq - // to minimize loss of precision. - BBFreq *= NewFreq; - // udiv is an expensive operation in the general case. If this ends up being - // a hot spot, one of the options proposed in - // https://reviews.llvm.org/D28535#650071 could be used to avoid this. - BBFreq = BBFreq.udiv(OldFreq); - BFI->setBlockFreq(BB, BBFreq.getLimitedValue()); - } - BFI->setBlockFreq(ReferenceBB, Freq); -} - -/// Pop up a ghostview window with the current block frequency propagation -/// rendered using dot. -void BlockFrequencyInfo::view(StringRef title) const { - ViewGraph(const_cast<BlockFrequencyInfo *>(this), title); -} - -const Function *BlockFrequencyInfo::getFunction() const { - return BFI ? BFI->getFunction() : nullptr; -} - -const BranchProbabilityInfo *BlockFrequencyInfo::getBPI() const { - return BFI ? &BFI->getBPI() : nullptr; -} - -raw_ostream &BlockFrequencyInfo:: -printBlockFreq(raw_ostream &OS, const BlockFrequency Freq) const { - return BFI ? BFI->printBlockFreq(OS, Freq) : OS; -} - -raw_ostream & -BlockFrequencyInfo::printBlockFreq(raw_ostream &OS, - const BasicBlock *BB) const { - return BFI ? BFI->printBlockFreq(OS, BB) : OS; -} - -uint64_t BlockFrequencyInfo::getEntryFreq() const { - return BFI ? BFI->getEntryFreq() : 0; -} - -void BlockFrequencyInfo::releaseMemory() { BFI.reset(); } - -void BlockFrequencyInfo::print(raw_ostream &OS) const { - if (BFI) - BFI->print(OS); -} - -INITIALIZE_PASS_BEGIN(BlockFrequencyInfoWrapperPass, "block-freq", - "Block Frequency Analysis", true, true) -INITIALIZE_PASS_DEPENDENCY(BranchProbabilityInfoWrapperPass) -INITIALIZE_PASS_DEPENDENCY(LoopInfoWrapperPass) -INITIALIZE_PASS_END(BlockFrequencyInfoWrapperPass, "block-freq", - "Block Frequency Analysis", true, true) - -char BlockFrequencyInfoWrapperPass::ID = 0; - -BlockFrequencyInfoWrapperPass::BlockFrequencyInfoWrapperPass() - : FunctionPass(ID) { - initializeBlockFrequencyInfoWrapperPassPass(*PassRegistry::getPassRegistry()); -} - -BlockFrequencyInfoWrapperPass::~BlockFrequencyInfoWrapperPass() = default; - -void BlockFrequencyInfoWrapperPass::print(raw_ostream &OS, - const Module *) const { - BFI.print(OS); -} - -void BlockFrequencyInfoWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const { - AU.addRequired<BranchProbabilityInfoWrapperPass>(); - AU.addRequired<LoopInfoWrapperPass>(); - AU.setPreservesAll(); -} - -void BlockFrequencyInfoWrapperPass::releaseMemory() { BFI.releaseMemory(); } - -bool BlockFrequencyInfoWrapperPass::runOnFunction(Function &F) { - BranchProbabilityInfo &BPI = - getAnalysis<BranchProbabilityInfoWrapperPass>().getBPI(); - LoopInfo &LI = getAnalysis<LoopInfoWrapperPass>().getLoopInfo(); - BFI.calculate(F, BPI, LI); - return false; -} - -AnalysisKey BlockFrequencyAnalysis::Key; -BlockFrequencyInfo BlockFrequencyAnalysis::run(Function &F, - FunctionAnalysisManager &AM) { - BlockFrequencyInfo BFI; - BFI.calculate(F, AM.getResult<BranchProbabilityAnalysis>(F), - AM.getResult<LoopAnalysis>(F)); - return BFI; -} - -PreservedAnalyses -BlockFrequencyPrinterPass::run(Function &F, FunctionAnalysisManager &AM) { - OS << "Printing analysis results of BFI for function " - << "'" << F.getName() << "':" - << "\n"; - AM.getResult<BlockFrequencyAnalysis>(F).print(OS); - return PreservedAnalyses::all(); -} |
