llvm-cov: add code coverage tool that's based on coverage mapping format and clang's pgo.

This commit expands llvm-cov's functionality by adding support for a new code coverage
tool that uses LLVM's coverage mapping format and clang's instrumentation based profiling.
The gcov compatible tool can be invoked by supplying the 'gcov' command as the first argument,
or by modifying the tool's name to end with 'gcov'.

Differential Revision: http://reviews.llvm.org/D4445

llvm-svn: 216300

1 files changed, 45 insertions, 0 deletions

diff --git a/llvm/tools/llvm-cov/CoverageSummary.h b/llvm/tools/llvm-cov/CoverageSummary.h
new file mode 100644
index 00000000000..bf4be08d923
--- /dev/null
+++ b/llvm/tools/llvm-cov/CoverageSummary.h
@@ -0,0 +1,45 @@
+//===- CoverageSummary.h - Code coverage summary --------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements data management and rendering for the code coverage
+// summaries of all files and functions.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_COV_COVERAGESUMMARY_H
+#define LLVM_COV_COVERAGESUMMARY_H
+
+#include "CoverageSummaryInfo.h"
+#include <vector>
+
+namespace llvm {
+
+/// \brief Manager for the function and file code coverage summaries.
+class CoverageSummary {
+  std::vector<StringRef> Filenames;
+  std::vector<FunctionCoverageSummary> FunctionSummaries;
+  std::vector<std::pair<unsigned, unsigned>> FunctionSummariesFileIDs;
+  std::vector<FileCoverageSummary> FileSummaries;
+
+  unsigned getFileID(StringRef Filename);
+
+public:
+  void createSummaries(ArrayRef<FunctionCoverageMapping> Functions);
+
+  ArrayRef<FileCoverageSummary> getFileSummaries() { return FileSummaries; }
+
+  FileCoverageSummary getCombinedFileSummaries();
+
+  void render(const FunctionCoverageSummary &Summary, raw_ostream &OS);
+
+  void render(raw_ostream &OS);
+};
+}
+
+#endif // LLVM_COV_COVERAGESUMMARY_H