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authorDimitry Andric <dim@FreeBSD.org>2019-12-20 19:53:05 +0000
committerDimitry Andric <dim@FreeBSD.org>2019-12-20 19:53:05 +0000
commit0b57cec536236d46e3dba9bd041533462f33dbb7 (patch)
tree56229dbdbbf76d18580f72f789003db17246c8d9 /contrib/llvm/tools/clang/lib/CodeGen/CodeGenPGO.h
parent718ef55ec7785aae63f98f8ca05dc07ed399c16d (diff)
Notes
Diffstat (limited to 'contrib/llvm/tools/clang/lib/CodeGen/CodeGenPGO.h')
-rw-r--r--contrib/llvm/tools/clang/lib/CodeGen/CodeGenPGO.h119
1 files changed, 0 insertions, 119 deletions
diff --git a/contrib/llvm/tools/clang/lib/CodeGen/CodeGenPGO.h b/contrib/llvm/tools/clang/lib/CodeGen/CodeGenPGO.h
deleted file mode 100644
index 2e740f789243..000000000000
--- a/contrib/llvm/tools/clang/lib/CodeGen/CodeGenPGO.h
+++ /dev/null
@@ -1,119 +0,0 @@
-//===--- CodeGenPGO.h - PGO Instrumentation for LLVM CodeGen ----*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// Instrumentation-based profile-guided optimization
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_CLANG_LIB_CODEGEN_CODEGENPGO_H
-#define LLVM_CLANG_LIB_CODEGEN_CODEGENPGO_H
-
-#include "CGBuilder.h"
-#include "CodeGenModule.h"
-#include "CodeGenTypes.h"
-#include "llvm/ProfileData/InstrProfReader.h"
-#include <array>
-#include <memory>
-
-namespace clang {
-namespace CodeGen {
-
-/// Per-function PGO state.
-class CodeGenPGO {
-private:
- CodeGenModule &CGM;
- std::string FuncName;
- llvm::GlobalVariable *FuncNameVar;
-
- std::array <unsigned, llvm::IPVK_Last + 1> NumValueSites;
- unsigned NumRegionCounters;
- uint64_t FunctionHash;
- std::unique_ptr<llvm::DenseMap<const Stmt *, unsigned>> RegionCounterMap;
- std::unique_ptr<llvm::DenseMap<const Stmt *, uint64_t>> StmtCountMap;
- std::unique_ptr<llvm::InstrProfRecord> ProfRecord;
- std::vector<uint64_t> RegionCounts;
- uint64_t CurrentRegionCount;
-
-public:
- CodeGenPGO(CodeGenModule &CGM)
- : CGM(CGM), NumValueSites({{0}}), NumRegionCounters(0), FunctionHash(0),
- CurrentRegionCount(0) {}
-
- /// Whether or not we have PGO region data for the current function. This is
- /// false both when we have no data at all and when our data has been
- /// discarded.
- bool haveRegionCounts() const { return !RegionCounts.empty(); }
-
- /// Return the counter value of the current region.
- uint64_t getCurrentRegionCount() const { return CurrentRegionCount; }
-
- /// Set the counter value for the current region. This is used to keep track
- /// of changes to the most recent counter from control flow and non-local
- /// exits.
- void setCurrentRegionCount(uint64_t Count) { CurrentRegionCount = Count; }
-
- /// Check if an execution count is known for a given statement. If so, return
- /// true and put the value in Count; else return false.
- Optional<uint64_t> getStmtCount(const Stmt *S) {
- if (!StmtCountMap)
- return None;
- auto I = StmtCountMap->find(S);
- if (I == StmtCountMap->end())
- return None;
- return I->second;
- }
-
- /// If the execution count for the current statement is known, record that
- /// as the current count.
- void setCurrentStmt(const Stmt *S) {
- if (auto Count = getStmtCount(S))
- setCurrentRegionCount(*Count);
- }
-
- /// Assign counters to regions and configure them for PGO of a given
- /// function. Does nothing if instrumentation is not enabled and either
- /// generates global variables or associates PGO data with each of the
- /// counters depending on whether we are generating or using instrumentation.
- void assignRegionCounters(GlobalDecl GD, llvm::Function *Fn);
- /// Emit a coverage mapping range with a counter zero
- /// for an unused declaration.
- void emitEmptyCounterMapping(const Decl *D, StringRef FuncName,
- llvm::GlobalValue::LinkageTypes Linkage);
- // Insert instrumentation or attach profile metadata at value sites
- void valueProfile(CGBuilderTy &Builder, uint32_t ValueKind,
- llvm::Instruction *ValueSite, llvm::Value *ValuePtr);
-private:
- void setFuncName(llvm::Function *Fn);
- void setFuncName(StringRef Name, llvm::GlobalValue::LinkageTypes Linkage);
- void mapRegionCounters(const Decl *D);
- void computeRegionCounts(const Decl *D);
- void applyFunctionAttributes(llvm::IndexedInstrProfReader *PGOReader,
- llvm::Function *Fn);
- void loadRegionCounts(llvm::IndexedInstrProfReader *PGOReader,
- bool IsInMainFile);
- bool skipRegionMappingForDecl(const Decl *D);
- void emitCounterRegionMapping(const Decl *D);
-
-public:
- void emitCounterIncrement(CGBuilderTy &Builder, const Stmt *S,
- llvm::Value *StepV);
-
- /// Return the region count for the counter at the given index.
- uint64_t getRegionCount(const Stmt *S) {
- if (!RegionCounterMap)
- return 0;
- if (!haveRegionCounts())
- return 0;
- return RegionCounts[(*RegionCounterMap)[S]];
- }
-};
-
-} // end namespace CodeGen
-} // end namespace clang
-
-#endif