[ASan] Emit lifetime markers for local variables in -fsanitize=use-after-scope mode

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178538 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/CodeGen/CGDecl.cpp b/lib/CodeGen/CGDecl.cpp
index d59c876d71..1255e654dc 100644
--- a/lib/CodeGen/CGDecl.cpp
+++ b/lib/CodeGen/CGDecl.cpp
@@ -786,6 +786,9 @@ static bool shouldUseMemSetPlusStoresToInitialize(llvm::Constant *Init,
 /// Should we use the LLVM lifetime intrinsics for the given local variable?
 static bool shouldUseLifetimeMarkers(CodeGenFunction &CGF, const VarDecl &D,
                                      unsigned Size) {
+  // Always emit lifetime markers in -fsanitize=use-after-scope mode.
+  if (CGF.getLangOpts().Sanitize.UseAfterScope)
+    return true;
   // For now, only in optimized builds.
   if (CGF.CGM.getCodeGenOpts().OptimizationLevel == 0)
     return false;