[llvm-cov] Implement -ignore-filename-regex= option for excluding source files.

Summary:
The option is helpful for large projects where it's not feasible to specify sources which
user would like to see in the report. Instead, it allows to black-list specific sources via
regular expressions (e.g. now it's possible to skip all files that have "test" in its name).

This also partially fixes https://bugs.llvm.org/show_bug.cgi?id=34277

Reviewers: vsk, morehouse, liaoyuke

Reviewed By: vsk

Subscribers: kcc, mgorny, llvm-commits

Differential Revision: https://reviews.llvm.org/D43907

llvm-svn: 329581

1 files changed, 7 insertions, 3 deletions

diff --git a/llvm/tools/llvm-cov/CoverageReport.cpp b/llvm/tools/llvm-cov/CoverageReport.cpp
index aafdc433775..5d892202f0d 100644
--- a/llvm/tools/llvm-cov/CoverageReport.cpp
+++ b/llvm/tools/llvm-cov/CoverageReport.cpp
@@ -379,10 +379,14 @@ std::vector<FileCoverageSummary> CoverageReport::prepareFileReports(
   return FileReports;
 }
 
-void CoverageReport::renderFileReports(raw_ostream &OS) const {
+void CoverageReport::renderFileReports(
+    raw_ostream &OS, const CoverageFilters &IgnoreFilenameFilters) const {
   std::vector<std::string> UniqueSourceFiles;
-  for (StringRef SF : Coverage.getUniqueSourceFiles())
-    UniqueSourceFiles.emplace_back(SF.str());
+  for (StringRef SF : Coverage.getUniqueSourceFiles()) {
+    // Apply ignore source files filters.
+    if (!IgnoreFilenameFilters.matchesFilename(SF))
+      UniqueSourceFiles.emplace_back(SF.str());
+  }
   renderFileReports(OS, UniqueSourceFiles);
 }