[llvm-cov] Hide instantiation views for unexecuted functions

Copying in the full text of the function doesn't help at all when we
already know that it's never executed. Just say that it's unexecuted --
the relevant source text has already been printed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@281589 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/tools/llvm-cov/Inputs/hideUnexecutedSubviews.proftext b/test/tools/llvm-cov/Inputs/hideUnexecutedSubviews.proftext
new file mode 100644 (file)
index 0000000..e31d562
--- /dev/null
+++ b/test/tools/llvm-cov/Inputs/hideUnexecutedSubviews.proftext
@@ -0,0 +1,16 @@
+_Z4funcIbEiT_
+10
+2
+0
+0
+
+_Z4funcIiEiT_
+10
+2
+0
+0
+
+main
+0
+1
+0

diff --git a/test/tools/llvm-cov/hideUnexecutedSubviews.test b/test/tools/llvm-cov/hideUnexecutedSubviews.test
new file mode 100644 (file)
index 0000000..44a7884
--- /dev/null
+++ b/test/tools/llvm-cov/hideUnexecutedSubviews.test
@@ -0,0 +1,10 @@
+RUN: llvm-profdata merge %S/Inputs/hideUnexecutedSubviews.proftext -o %t.profdata
+
+RUN: llvm-cov show %S/Inputs/templateInstantiations.covmapping -instr-profile %t.profdata -filename-equivalence %S/showTemplateInstantiations.cpp | FileCheck %s
+
+RUN: llvm-cov show %S/Inputs/templateInstantiations.covmapping -instr-profile %t.profdata -format html -o %t.html.dir -filename-equivalence %S/showTemplateInstantiations.cpp
+RUN: FileCheck %s -input-file %t.html.dir/coverage/tmp/showTemplateInstantiations.cpp.html
+
+CHECK: Unexecuted instantiation: _Z4funcIbEiT_
+CHECK: Unexecuted instantiation: _Z4funcIiEiT_
+CHECK-NOT: Unexecuted instantiation

diff --git a/tools/llvm-cov/CodeCoverage.cpp b/tools/llvm-cov/CodeCoverage.cpp
index 6edca9f..9eacbca 100644 (file)
--- a/tools/llvm-cov/CodeCoverage.cpp
+++ b/tools/llvm-cov/CodeCoverage.cpp
@@ -234,21 +234,23 @@ CodeCoverageTool::createSourceFileView(StringRef SourceFile,
   attachExpansionSubViews(*View, Expansions, Coverage);
 
   for (const auto *Function : Coverage.getInstantiations(SourceFile)) {
-    auto SubViewCoverage = Coverage.getCoverageForFunction(*Function);
-    auto SubViewExpansions = SubViewCoverage.getExpansions();
-    auto SubView = SourceCoverageView::create(
-        getSymbolForHumans(Function->Name), SourceBuffer.get(), ViewOpts,
-        std::move(SubViewCoverage));
-    attachExpansionSubViews(*SubView, SubViewExpansions, Coverage);
-
-    if (SubView) {
-      unsigned FileID = Function->CountedRegions.front().FileID;
-      unsigned Line = 0;
-      for (const auto &CR : Function->CountedRegions)
-        if (CR.FileID == FileID)
-          Line = std::max(CR.LineEnd, Line);
-      View->addInstantiation(Function->Name, Line, std::move(SubView));
+    std::unique_ptr<SourceCoverageView> SubView{nullptr};
+
+    if (Function->ExecutionCount > 0) {
+      auto SubViewCoverage = Coverage.getCoverageForFunction(*Function);
+      auto SubViewExpansions = SubViewCoverage.getExpansions();
+      SubView = SourceCoverageView::create(
+          getSymbolForHumans(Function->Name), SourceBuffer.get(), ViewOpts,
+          std::move(SubViewCoverage));
+      attachExpansionSubViews(*SubView, SubViewExpansions, Coverage);
     }
+
+    unsigned FileID = Function->CountedRegions.front().FileID;
+    unsigned Line = 0;
+    for (const auto &CR : Function->CountedRegions)
+      if (CR.FileID == FileID)
+        Line = std::max(CR.LineEnd, Line);
+    View->addInstantiation(Function->Name, Line, std::move(SubView));
   }
   return View;
 }

diff --git a/tools/llvm-cov/SourceCoverageViewHTML.cpp b/tools/llvm-cov/SourceCoverageViewHTML.cpp
index 0f17655..31d6fd3 100644 (file)
--- a/tools/llvm-cov/SourceCoverageViewHTML.cpp
+++ b/tools/llvm-cov/SourceCoverageViewHTML.cpp
@@ -584,7 +584,15 @@ void SourceCoverageViewHTML::renderInstantiationView(raw_ostream &OS,
                                                      InstantiationView &ISV,
                                                      unsigned ViewDepth) {
   OS << BeginExpansionDiv;
-  ISV.View->print(OS, /*WholeFile=*/false, /*ShowSourceName=*/true, ViewDepth);
+  if (!ISV.View)
+    OS << BeginSourceNameDiv
+       << tag("pre",
+              escape("Unexecuted instantiation: " + ISV.FunctionName.str(),
+                     getOptions()))
+       << EndSourceNameDiv;
+  else
+    ISV.View->print(OS, /*WholeFile=*/false, /*ShowSourceName=*/true,
+                    ViewDepth);
   OS << EndExpansionDiv;
 }
 

diff --git a/tools/llvm-cov/SourceCoverageViewText.cpp b/tools/llvm-cov/SourceCoverageViewText.cpp
index 51c6463..f5201d9 100644 (file)
--- a/tools/llvm-cov/SourceCoverageViewText.cpp
+++ b/tools/llvm-cov/SourceCoverageViewText.cpp
@@ -215,7 +215,12 @@ void SourceCoverageViewText::renderInstantiationView(raw_ostream &OS,
                                                      unsigned ViewDepth) {
   renderLinePrefix(OS, ViewDepth);
   OS << ' ';
-  ISV.View->print(OS, /*WholeFile=*/false, /*ShowSourceName=*/true, ViewDepth);
+  if (!ISV.View)
+    getOptions().colored_ostream(OS, raw_ostream::RED)
+        << "Unexecuted instantiation: " << ISV.FunctionName << "\n";
+  else
+    ISV.View->print(OS, /*WholeFile=*/false, /*ShowSourceName=*/true,
+                    ViewDepth);
 }
 
 void SourceCoverageViewText::renderTitle(raw_ostream &OS, StringRef Title) {