Index: test/tools/llvm-cov/Inputs/sources_specified/abs.h
===================================================================
--- /dev/null
+++ test/tools/llvm-cov/Inputs/sources_specified/abs.h
@@ -0,0 +1,5 @@
+int abs(int x) {
+  if (x < 0)
+    return -x;
+  return x;
+}
Index: test/tools/llvm-cov/Inputs/sources_specified/extra/dec.h
===================================================================
--- /dev/null
+++ test/tools/llvm-cov/Inputs/sources_specified/extra/dec.h
@@ -0,0 +1,3 @@
+int dec(int x) {
+  return x + 1;
+}
Index: test/tools/llvm-cov/Inputs/sources_specified/extra/inc.h
===================================================================
--- /dev/null
+++ test/tools/llvm-cov/Inputs/sources_specified/extra/inc.h
@@ -0,0 +1,3 @@
+int inc(int x) {
+  return x + 1;
+}
Index: test/tools/llvm-cov/Inputs/sources_specified/main.cc
===================================================================
--- /dev/null
+++ test/tools/llvm-cov/Inputs/sources_specified/main.cc
@@ -0,0 +1,9 @@
+#include "abs.h"
+#include "extra/dec.h"
+#include "extra/inc.h"
+
+int main() {
+  int x = 0;
+  inc(x);
+  return abs(x);
+}
Index: test/tools/llvm-cov/sources-specified.test
===================================================================
--- /dev/null
+++ test/tools/llvm-cov/sources-specified.test
@@ -0,0 +1,28 @@
+RUN: llvm-cov report -instr-profile %S/Inputs/sources_specified/main.profdata \
+RUN:   %S/Inputs/sources_specified/main.covmapping \
+RUN:   %S/Inputs/sources_specified/main.cc %S/Inputs/sources_specified/extra \
+RUN:   | FileCheck -check-prefix=REPORT %s
+
+RUN: llvm-cov show -instr-profile %S/Inputs/sources_specified/main.profdata \
+RUN:   %S/Inputs/sources_specified/main.covmapping \
+RUN:   %S/Inputs/sources_specified/main.cc %S/Inputs/sources_specified/extra \
+RUN:   | FileCheck -check-prefix=SHOW %s
+
+
+REPORT: {{^}}main.cc{{.*}}
+REPORT: {{^}}extra{{[/\\]}}{{dec|inc}}.h{{.*}}
+REPORT: {{^}}extra{{[/\\]}}{{dec|inc}}.h{{.*}}
+REPORT-NOT: {{^}}abs.h{{.*}}
+
+SHOW: {{.*}}main.cc{{.*}}
+SHOW: {{.*}}extra{{[/\\]}}{{dec|inc}}.h{{.*}}
+SHOW: {{.*}}extra{{[/\\]}}{{dec|inc}}.h{{.*}}
+SHOW-NOT: {{.*}}abs.h{{.*}}
+
+Instructions for regenerating the test:
+
+clang -mllvm -enable-name-compression=false -fprofile-instr-generate -fcoverage-mapping main.cc -o main
+
+LLVM_PROFILE_FILE="main.raw" ./main
+llvm-profdata merge main.raw -o main.profdata
+llvm-cov convert-for-testing ./main -o ./main.covmapping
Index: tools/llvm-cov/CodeCoverage.cpp
===================================================================
--- tools/llvm-cov/CodeCoverage.cpp
+++ tools/llvm-cov/CodeCoverage.cpp
@@ -947,7 +947,10 @@
 
   CoverageReport Report(ViewOpts, *Coverage.get());
   if (!ShowFunctionSummaries) {
-    Report.renderFileReports(llvm::outs());
+    if (SourceFiles.empty())
+      Report.renderFileReports(llvm::outs());
+    else
+      Report.renderFileReports(llvm::outs(), SourceFiles);
   } else {
     if (SourceFiles.empty()) {
       error("Source files must be specified when -show-functions=true is "
Index: tools/llvm-cov/CoverageReport.h
===================================================================
--- tools/llvm-cov/CoverageReport.h
+++ tools/llvm-cov/CoverageReport.h
@@ -47,6 +47,9 @@
   /// Render file reports for every unique file in the coverage mapping.
   void renderFileReports(raw_ostream &OS) const;
 
+  /// Render file reports for the files specified in \p Files.
+  void renderFileReports(raw_ostream &OS, ArrayRef<std::string> Files) const;
+
   /// Render file reports for the files specified in \p Files and the functions
   /// in \p Filters.
   void renderFileReports(raw_ostream &OS, ArrayRef<std::string> Files,
Index: tools/llvm-cov/CoverageReport.cpp
===================================================================
--- tools/llvm-cov/CoverageReport.cpp
+++ tools/llvm-cov/CoverageReport.cpp
@@ -364,7 +364,12 @@
   std::vector<std::string> UniqueSourceFiles;
   for (StringRef SF : Coverage.getUniqueSourceFiles())
     UniqueSourceFiles.emplace_back(SF.str());
-  renderFileReports(OS, UniqueSourceFiles, CoverageFiltersMatchAll());
+  renderFileReports(OS, UniqueSourceFiles);
+}
+
+void CoverageReport::renderFileReports(
+    raw_ostream &OS, ArrayRef<std::string> Files) const {
+  renderFileReports(OS, Files, CoverageFiltersMatchAll());
 }
 
 void CoverageReport::renderFileReports(