diff --git a/llvm/test/tools/llvm-cov/native_separators.c b/llvm/test/tools/llvm-cov/native_separators.c
--- a/llvm/test/tools/llvm-cov/native_separators.c
+++ b/llvm/test/tools/llvm-cov/native_separators.c
@@ -8,7 +8,7 @@
 // RUN: llvm-profdata merge %S/Inputs/double_dots.proftext -o %t.profdata
 // RUN: llvm-cov show %S/Inputs/native_separators.covmapping -instr-profile=%t.profdata -o %t.dir
 // RUN: FileCheck -check-prefixes=TEXT-INDEX -input-file=%t.dir/index.txt %s
-// RUN: llvm-cov show -format=html %S/Inputs/native_separators.covmapping -instr-profile=%t.profdata -path-equivalence=/tmp,%S ../llvm-"config"/../llvm-"cov"/native_separators.c -o %t.dir
+// RUN: llvm-cov show -format=html %S/Inputs/native_separators.covmapping -instr-profile=%t.profdata -path-equivalence=/tmp,%S %S/../llvm-"config"/../llvm-"cov"/native_separators.c -o %t.dir
 // RUN: FileCheck -check-prefixes=HTML-INDEX -input-file=%t.dir/index.html %s
 // RUN: llvm-cov show -format=html %S/Inputs/native_separators.covmapping -instr-profile=%t.profdata -path-equivalence=/tmp,%S %s -o %t.dir
 // RUN: FileCheck -check-prefixes=HTML -input-file=%t.dir/coverage/tmp/native_separators.c.html %s
diff --git a/llvm/test/tools/llvm-cov/sources-specified.test b/llvm/test/tools/llvm-cov/sources-specified.test
--- a/llvm/test/tools/llvm-cov/sources-specified.test
+++ b/llvm/test/tools/llvm-cov/sources-specified.test
@@ -10,6 +10,18 @@
 RUN:   %S/Inputs/sources_specified/main.cc %S/Inputs/sources_specified/extra \
 RUN:   | FileCheck -check-prefix=SHOW %s
 
+# Don't include all source files when provided source files are filtered out.
+RUN: llvm-cov show -instr-profile %S/Inputs/sources_specified/main.profdata \
+RUN:   -path-equivalence=/tmp,%S/Inputs \
+RUN:   %S/Inputs/sources_specified/main.covmapping \
+RUN:   --ignore-filename-regex='.*' \
+RUN:   %S/Inputs/sources_specified/main.cc %S/Inputs/sources_specified/extra \
+RUN:   | FileCheck -allow-empty -check-prefix=IGNORE %s
+
+IGNORE-NOT: {{.*}}main.cc{{.*}}
+IGNORE-NOT: {{.*}}inc.h{{.*}}
+IGNORE-NOT: {{.*}}dec.h{{.*}}
+
 # Order of files may differ, check the total values calculated.
 REPORT-NOT: {{.*}}abs.h{{.*}}
 REPORT: {{^}}TOTAL 3{{.*}}72.73%
diff --git a/llvm/test/tools/llvm-cov/universal_bin_wrapping_archives.test b/llvm/test/tools/llvm-cov/universal_bin_wrapping_archives.test
--- a/llvm/test/tools/llvm-cov/universal_bin_wrapping_archives.test
+++ b/llvm/test/tools/llvm-cov/universal_bin_wrapping_archives.test
@@ -17,11 +17,11 @@
 RUN: llvm-profdata merge %S/Inputs/universal_bin_wrapping_archives/universal_bin_wrapping_archives.proftext -o %t.profdata
 
 RUN: llvm-cov show %S/Inputs/universal_bin_wrapping_archives/universal_bin_wrapping_archives \
-RUN:   -instr-profile %t.profdata -path-equivalence=/tmp,%S/Inputs/universal_bin_wrapping_archives %s -arch i386 \
+RUN:   -instr-profile %t.profdata -path-equivalence=/tmp,%S/Inputs/universal_bin_wrapping_archives -arch i386 \
 RUN:   | FileCheck %s --check-prefix=SHOW_ARCHIVE
 
 RUN: llvm-cov show %S/Inputs/universal_bin_wrapping_archives/universal_bin_wrapping_archives \
-RUN:   -instr-profile %t.profdata -path-equivalence=/tmp,%S/Inputs/universal_bin_wrapping_archives %s -arch x86_64 \
+RUN:   -instr-profile %t.profdata -path-equivalence=/tmp,%S/Inputs/universal_bin_wrapping_archives -arch x86_64 \
 RUN:   | FileCheck %s --check-prefix=SHOW_ARCHIVE
 
 SHOW_ARCHIVE: {{.*}}obj1.c:
diff --git a/llvm/test/tools/llvm-cov/warnings.h b/llvm/test/tools/llvm-cov/warnings.h
--- a/llvm/test/tools/llvm-cov/warnings.h
+++ b/llvm/test/tools/llvm-cov/warnings.h
@@ -1,13 +1,13 @@
-// RUN: llvm-cov show %S/Inputs/prevent_false_instantiations.covmapping -instr-profile %S/Inputs/elf_binary_comdat.profdata -path-equivalence=/tmp,%S /dev/null | FileCheck %s -allow-empty -check-prefix=FAKE-FILE-STDOUT
-// RUN: llvm-cov show %S/Inputs/prevent_false_instantiations.covmapping -instr-profile %S/Inputs/elf_binary_comdat.profdata -path-equivalence=/tmp,%S /dev/null 2>&1 | FileCheck %s -check-prefix=FAKE-FILE-STDERR
+// RUN: llvm-cov show %S/Inputs/prevent_false_instantiations.covmapping -instr-profile %S/Inputs/elf_binary_comdat.profdata -path-equivalence=/tmp,%S | FileCheck %s -allow-empty -check-prefix=FAKE-FILE-STDOUT
+// RUN: llvm-cov show %S/Inputs/prevent_false_instantiations.covmapping -instr-profile %S/Inputs/elf_binary_comdat.profdata -path-equivalence=/tmp,%S 2>&1 | FileCheck %s -check-prefix=FAKE-FILE-STDERR
 // RUN: not llvm-cov report %S/Inputs/prevent_false_instantiations.covmapping -instr-profile %S/Inputs/elf_binary_comdat.profdata -format=html
 // RUN: not llvm-cov export %S/Inputs/prevent_false_instantiations.covmapping -instr-profile %S/Inputs/elf_binary_comdat.profdata -format=html
 
 // FAKE-FILE-STDOUT-NOT: warning: The file '{{.*}}' isn't covered.
 // FAKE-FILE-STDERR: warning: The file '{{.*}}' isn't covered.
 
-// RUN: llvm-cov show %S/Inputs/prevent_false_instantiations.covmapping -instr-profile %S/Inputs/elf_binary_comdat.profdata -path-equivalence=/tmp,%S -name ".*" /dev/null | FileCheck %s -allow-empty -check-prefix=FAKE-FUNC-STDOUT
-// RUN: llvm-cov show %S/Inputs/prevent_false_instantiations.covmapping -instr-profile %S/Inputs/elf_binary_comdat.profdata -path-equivalence=/tmp,%S -name-regex ".*" /dev/null 2>&1 | FileCheck %s -check-prefix=FAKE-FUNC-STDERR
+// RUN: llvm-cov show %S/Inputs/prevent_false_instantiations.covmapping -instr-profile %S/Inputs/elf_binary_comdat.profdata -path-equivalence=/tmp,%S -name=".*" | FileCheck %s -allow-empty -check-prefix=FAKE-FUNC-STDOUT
+// RUN: llvm-cov show %S/Inputs/prevent_false_instantiations.covmapping -instr-profile %S/Inputs/elf_binary_comdat.profdata -path-equivalence=/tmp,%S -name-regex=".*" 2>&1 | FileCheck %s -check-prefix=FAKE-FUNC-STDERR
 
 // FAKE-FUNC-STDOUT-NOT: warning: Could not read coverage for '{{.*}}'.
 // FAKE-FUNC-STDERR: Could not read coverage for '{{.*}}'.
diff --git a/llvm/tools/llvm-cov/CodeCoverage.cpp b/llvm/tools/llvm-cov/CodeCoverage.cpp
--- a/llvm/tools/llvm-cov/CodeCoverage.cpp
+++ b/llvm/tools/llvm-cov/CodeCoverage.cpp
@@ -130,6 +130,9 @@
   CoverageFiltersMatchAll Filters;
   CoverageFilters IgnoreFilenameFilters;
 
+  /// True if InputSourceFiles are provided.
+  bool HadSourceFiles = false;
+
   /// The path to the indexed profile.
   std::string PGOFilename;
 
@@ -194,6 +197,7 @@
   sys::path::remove_dots(EffectivePath, /*remove_dot_dots=*/true);
   if (!IgnoreFilenameFilters.matchesFilename(EffectivePath))
     SourceFiles.emplace_back(EffectivePath.str());
+  HadSourceFiles = !SourceFiles.empty();
 }
 
 void CodeCoverageTool::collectPaths(const std::string &Path) {
@@ -397,6 +401,7 @@
     sys::path::native(Path, NativePath);
     if (!sys::path::is_separator(NativePath.back()))
       NativePath += sys::path::get_separator();
+    sys::path::remove_dots(NativePath, true);
     return NativePath.c_str();
   };
   std::string RemapFrom = nativeWithTrailing(PathRemapping->first);
@@ -406,6 +411,7 @@
   for (StringRef Filename : Coverage.getUniqueSourceFiles()) {
     SmallString<128> NativeFilename;
     sys::path::native(Filename, NativeFilename);
+    sys::path::remove_dots(NativeFilename, true);
     if (NativeFilename.startswith(RemapFrom)) {
       RemappedFilenames[Filename] =
           RemapTo + NativeFilename.substr(RemapFrom.size()).str();
@@ -895,7 +901,7 @@
 
   auto Printer = CoveragePrinter::create(ViewOpts);
 
-  if (SourceFiles.empty())
+  if (SourceFiles.empty() && !HadSourceFiles)
     // Get the source files from the function coverage mapping.
     for (StringRef Filename : Coverage->getUniqueSourceFiles()) {
       if (!IgnoreFilenameFilters.matchesFilename(Filename))