From a61e52c9b7cf874b46cef687c1c4627a35952542 Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Thu, 21 Apr 2011 01:56:25 +0000
Subject: [PATCH] Add independent controls for whether GCOV profiling should
 emit .gcno files or instrument the program to emit .gcda. TODO: we should
 emit slightly different .gcda files when .gcno emission is off.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129903 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/LinkAllPasses.h                  |  2 +-
 include/llvm/Transforms/Instrumentation.h     |  2 +-
 .../Instrumentation/GCOVProfiling.cpp         | 20 +++++++++++++++----
 3 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/include/llvm/LinkAllPasses.h b/include/llvm/LinkAllPasses.h
index 56c113b4528..88ee65ac311 100644
--- a/include/llvm/LinkAllPasses.h
+++ b/include/llvm/LinkAllPasses.h
@@ -70,7 +70,7 @@ namespace {
       (void) llvm::createEdgeProfilerPass();
       (void) llvm::createOptimalEdgeProfilerPass();
       (void) llvm::createPathProfilerPass();
-      (void) llvm::createGCOVProfilerPass();
+      (void) llvm::createGCOVProfilerPass(true, true);
       (void) llvm::createFunctionInliningPass();
       (void) llvm::createAlwaysInlinerPass();
       (void) llvm::createGlobalDCEPass();
diff --git a/include/llvm/Transforms/Instrumentation.h b/include/llvm/Transforms/Instrumentation.h
index 3ef2f5a14d0..088775a9dfe 100644
--- a/include/llvm/Transforms/Instrumentation.h
+++ b/include/llvm/Transforms/Instrumentation.h
@@ -28,7 +28,7 @@ ModulePass *createOptimalEdgeProfilerPass();
 ModulePass *createPathProfilerPass();
 
 // Insert GCOV profiling instrumentation
-ModulePass *createGCOVProfilerPass();
+ModulePass *createGCOVProfilerPass(bool EmitNotes = true, bool EmitData = true);
 
 } // End llvm namespace
 
diff --git a/lib/Transforms/Instrumentation/GCOVProfiling.cpp b/lib/Transforms/Instrumentation/GCOVProfiling.cpp
index 4e63a43f831..a3ad5fe2e2d 100644
--- a/lib/Transforms/Instrumentation/GCOVProfiling.cpp
+++ b/lib/Transforms/Instrumentation/GCOVProfiling.cpp
@@ -43,7 +43,13 @@ namespace {
     bool runOnModule(Module &M);
   public:
     static char ID;
-    GCOVProfiler() : ModulePass(ID) {
+    GCOVProfiler()
+        : ModulePass(ID), EmitNotes(true), EmitData(true) {
+      initializeGCOVProfilerPass(*PassRegistry::getPassRegistry());
+    }
+    GCOVProfiler(bool EmitNotes, bool EmitData)
+        : ModulePass(ID), EmitNotes(EmitNotes), EmitData(EmitData) {
+      assert((EmitNotes || EmitData) && "GCOVProfiler asked to do nothing?");
       initializeGCOVProfilerPass(*PassRegistry::getPassRegistry());
     }
     virtual const char *getPassName() const {
@@ -70,6 +76,9 @@ namespace {
                                SmallVector<std::pair<GlobalVariable *,
                                                      uint32_t>, 8> &);
 
+    bool EmitNotes;
+    bool EmitData;
+
     Module *Mod;
     LLVMContext *Ctx;
   };
@@ -79,7 +88,9 @@ char GCOVProfiler::ID = 0;
 INITIALIZE_PASS(GCOVProfiler, "insert-gcov-profiling",
                 "Insert instrumentation for GCOV profiling", false, false)
 
-ModulePass *llvm::createGCOVProfilerPass() { return new GCOVProfiler(); }
+ModulePass *llvm::createGCOVProfilerPass(bool EmitNotes, bool EmitData) {
+  return new GCOVProfiler(EmitNotes, EmitData);
+}
 
 static DISubprogram FindSubprogram(DIScope scope) {
   while (!scope.isSubprogram()) {
@@ -301,8 +312,9 @@ bool GCOVProfiler::runOnModule(Module &M) {
   DebugInfoFinder DIF;
   DIF.processModule(*Mod);
 
-  EmitGCNO(DIF);
-  return EmitProfileArcs(DIF);
+  if (EmitNotes) EmitGCNO(DIF);
+  if (EmitData) return EmitProfileArcs(DIF);
+  return false;
 }
 
 void GCOVProfiler::EmitGCNO(DebugInfoFinder &DIF) {