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3919a501f3
This patch teaches the preprocessor to report more precise source ranges for code that is skipped due to conditional directives. The new behavior includes the '#' from the opening directive and the full text of the line containing the closing directive in the skipped area. This matches up clang's behavior (we don't IRGen the code between the closing "endif" and the end of a line). This also affects the code coverage implementation. See llvm.org/PR34166 (this also happens to be rdar://problem/23224058). The old behavior (report the end of the skipped range as the end location of the 'endif' token) is preserved for indexing clients. Differential Revision: https://reviews.llvm.org/D36642 llvm-svn: 312947
116 lines
3.9 KiB
C++
116 lines
3.9 KiB
C++
//===---- CoverageMappingGen.h - Coverage mapping generation ----*- 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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//
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// Instrumentation-based code coverage mapping generator
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_CODEGEN_COVERAGEMAPPINGGEN_H
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#define LLVM_CLANG_LIB_CODEGEN_COVERAGEMAPPINGGEN_H
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#include "clang/Basic/LLVM.h"
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#include "clang/Basic/SourceLocation.h"
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#include "clang/Frontend/CodeGenOptions.h"
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#include "clang/Lex/PPCallbacks.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/IR/GlobalValue.h"
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#include "llvm/Support/raw_ostream.h"
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namespace clang {
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class LangOptions;
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class SourceManager;
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class FileEntry;
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class Preprocessor;
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class Decl;
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class Stmt;
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/// \brief Stores additional source code information like skipped ranges which
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/// is required by the coverage mapping generator and is obtained from
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/// the preprocessor.
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class CoverageSourceInfo : public PPCallbacks {
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std::vector<SourceRange> SkippedRanges;
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public:
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ArrayRef<SourceRange> getSkippedRanges() const { return SkippedRanges; }
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void SourceRangeSkipped(SourceRange Range, SourceLocation EndifLoc) override;
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};
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namespace CodeGen {
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class CodeGenModule;
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/// \brief Organizes the cross-function state that is used while generating
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/// code coverage mapping data.
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class CoverageMappingModuleGen {
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CodeGenModule &CGM;
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CoverageSourceInfo &SourceInfo;
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llvm::SmallDenseMap<const FileEntry *, unsigned, 8> FileEntries;
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std::vector<llvm::Constant *> FunctionRecords;
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std::vector<llvm::Constant *> FunctionNames;
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llvm::StructType *FunctionRecordTy;
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std::vector<std::string> CoverageMappings;
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public:
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CoverageMappingModuleGen(CodeGenModule &CGM, CoverageSourceInfo &SourceInfo)
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: CGM(CGM), SourceInfo(SourceInfo), FunctionRecordTy(nullptr) {}
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CoverageSourceInfo &getSourceInfo() const {
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return SourceInfo;
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}
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/// \brief Add a function's coverage mapping record to the collection of the
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/// function mapping records.
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void addFunctionMappingRecord(llvm::GlobalVariable *FunctionName,
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StringRef FunctionNameValue,
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uint64_t FunctionHash,
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const std::string &CoverageMapping,
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bool IsUsed = true);
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/// \brief Emit the coverage mapping data for a translation unit.
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void emit();
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/// \brief Return the coverage mapping translation unit file id
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/// for the given file.
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unsigned getFileID(const FileEntry *File);
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};
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/// \brief Organizes the per-function state that is used while generating
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/// code coverage mapping data.
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class CoverageMappingGen {
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CoverageMappingModuleGen &CVM;
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SourceManager &SM;
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const LangOptions &LangOpts;
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llvm::DenseMap<const Stmt *, unsigned> *CounterMap;
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public:
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CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,
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const LangOptions &LangOpts)
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: CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(nullptr) {}
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CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,
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const LangOptions &LangOpts,
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llvm::DenseMap<const Stmt *, unsigned> *CounterMap)
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: CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(CounterMap) {}
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/// \brief Emit the coverage mapping data which maps the regions of
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/// code to counters that will be used to find the execution
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/// counts for those regions.
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void emitCounterMapping(const Decl *D, llvm::raw_ostream &OS);
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/// \brief Emit the coverage mapping data for an unused function.
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/// It creates mapping regions with the counter of zero.
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void emitEmptyMapping(const Decl *D, llvm::raw_ostream &OS);
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};
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} // end namespace CodeGen
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} // end namespace clang
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#endif
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