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authorpatrick <patrick@openbsd.org>2020-08-03 15:06:44 +0000
committerpatrick <patrick@openbsd.org>2020-08-03 15:06:44 +0000
commitb64793999546ed8adebaeebd9d8345d18db8927d (patch)
tree4357c27b561d73b0e089727c6ed659f2ceff5f47 /gnu/llvm/lib/Analysis/BlockFrequencyInfo.cpp
parentAdd support for UTF-8 DISPLAY-HINTs with octet length. For now only (diff)
downloadwireguard-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.cpp342
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
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-//===- 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();
-}