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f7f1e6f3b0
This is a version of D32090 that unifies all of the `getInstrProf*SectionName` helper functions. (Note: the build failures which D32090 would have addressed were fixed with r300352.) We should unify these helper functions because they are hard to use in their current form. E.g we recently introduced more helpers to fix section naming for COFF files. This scheme doesn't totally succeed at hiding low-level details about section naming, so we should switch to an API that is easier to maintain. This is not an NFC commit because it fixes llvm-cov's testing support for COFF files (this falls out of the API change naturally). This is an area where we lack tests -- I will see about adding one as a follow up. Testing: check-clang, check-profile, check-llvm. Differential Revision: https://reviews.llvm.org/D32097 llvm-svn: 300381
109 lines
3.6 KiB
C++
109 lines
3.6 KiB
C++
//===- Transforms/InstrProfiling.h - Instrumentation passes -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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/// \file
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/// This file provides the interface for LLVM's PGO Instrumentation lowering
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/// pass.
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_INSTRPROFILING_H
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#define LLVM_TRANSFORMS_INSTRPROFILING_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/IR/IntrinsicInst.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/ProfileData/InstrProf.h"
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#include "llvm/Transforms/Instrumentation.h"
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#include <cstddef>
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#include <cstdint>
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#include <cstring>
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#include <vector>
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namespace llvm {
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class TargetLibraryInfo;
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/// Instrumentation based profiling lowering pass. This pass lowers
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/// the profile instrumented code generated by FE or the IR based
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/// instrumentation pass.
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class InstrProfiling : public PassInfoMixin<InstrProfiling> {
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public:
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InstrProfiling() = default;
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InstrProfiling(const InstrProfOptions &Options) : Options(Options) {}
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PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
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bool run(Module &M, const TargetLibraryInfo &TLI);
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private:
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InstrProfOptions Options;
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Module *M;
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Triple TT;
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const TargetLibraryInfo *TLI;
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struct PerFunctionProfileData {
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uint32_t NumValueSites[IPVK_Last + 1];
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GlobalVariable *RegionCounters = nullptr;
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GlobalVariable *DataVar = nullptr;
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PerFunctionProfileData() {
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memset(NumValueSites, 0, sizeof(uint32_t) * (IPVK_Last + 1));
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}
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};
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DenseMap<GlobalVariable *, PerFunctionProfileData> ProfileDataMap;
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std::vector<GlobalValue *> UsedVars;
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std::vector<GlobalVariable *> ReferencedNames;
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GlobalVariable *NamesVar;
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size_t NamesSize;
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// The start value of precise value profile range for memory intrinsic sizes.
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int64_t MemOPSizeRangeStart;
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// The end value of precise value profile range for memory intrinsic sizes.
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int64_t MemOPSizeRangeLast;
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/// Count the number of instrumented value sites for the function.
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void computeNumValueSiteCounts(InstrProfValueProfileInst *Ins);
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/// Replace instrprof_value_profile with a call to runtime library.
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void lowerValueProfileInst(InstrProfValueProfileInst *Ins);
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/// Replace instrprof_increment with an increment of the appropriate value.
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void lowerIncrement(InstrProfIncrementInst *Inc);
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/// Force emitting of name vars for unused functions.
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void lowerCoverageData(GlobalVariable *CoverageNamesVar);
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/// Get the region counters for an increment, creating them if necessary.
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///
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/// If the counter array doesn't yet exist, the profile data variables
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/// referring to them will also be created.
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GlobalVariable *getOrCreateRegionCounters(InstrProfIncrementInst *Inc);
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/// Emit the section with compressed function names.
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void emitNameData();
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/// Emit value nodes section for value profiling.
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void emitVNodes();
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/// Emit runtime registration functions for each profile data variable.
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void emitRegistration();
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/// Emit the necessary plumbing to pull in the runtime initialization.
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void emitRuntimeHook();
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/// Add uses of our data variables and runtime hook.
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void emitUses();
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/// Create a static initializer for our data, on platforms that need it,
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/// and for any profile output file that was specified.
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void emitInitialization();
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};
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} // end namespace llvm
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#endif // LLVM_TRANSFORMS_INSTRPROFILING_H
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