[msan] Stop propagating shadow in blacklisted functions.

[oota-llvm.git] / lib / Transforms / Instrumentation / GCOVProfiling.cpp

diff --git a/lib/Transforms/Instrumentation/GCOVProfiling.cpp b/lib/Transforms/Instrumentation/GCOVProfiling.cpp
index 1dfe58868045e98e7876d40e8a7b6a33e1773001..cfeb62eb1f9fc722eb1eb980d4da22a53c9755d3 100644 (file)
--- a/lib/Transforms/Instrumentation/GCOVProfiling.cpp
+++ b/lib/Transforms/Instrumentation/GCOVProfiling.cpp
@@ -454,9 +454,16 @@ static bool functionHasLines(Function *F) {
   for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
     for (BasicBlock::iterator I = BB->begin(), IE = BB->end();
          I != IE; ++I) {
+      // Debug intrinsic locations correspond to the location of the
+      // declaration, not necessarily any statements or expressions.
       if (isa<DbgInfoIntrinsic>(I)) continue;
+
       const DebugLoc &Loc = I->getDebugLoc();
       if (Loc.isUnknown()) continue;
+
+      // Artificial lines such as calls to the global constructors.
+      if (Loc.getLine() == 0) continue; 
+
       return true;
     }
   }
@@ -516,9 +523,16 @@ void GCOVProfiler::emitProfileNotes() {
         uint32_t Line = 0;
         for (BasicBlock::iterator I = BB->begin(), IE = BB->end();
              I != IE; ++I) {
+          // Debug intrinsic locations correspond to the location of the
+          // declaration, not necessarily any statements or expressions.
           if (isa<DbgInfoIntrinsic>(I)) continue;
+
           const DebugLoc &Loc = I->getDebugLoc();
           if (Loc.isUnknown()) continue;
+
+          // Artificial lines such as calls to the global constructors.
+          if (Loc.getLine() == 0) continue;
+
           if (Line == Loc.getLine()) continue;
           Line = Loc.getLine();
           if (SP != getDISubprogram(Loc.getScope(*Ctx))) continue;