1 files changed, 3 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
index 62a5792d27d..4856f5404c1 100644
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -561,6 +561,9 @@ void CodeGenModule::ConstructAttributeList(const CGFunctionInfo &FI,
     const ABIArgInfo &AI = it->info;
     unsigned Attributes = 0;
 
+    if (ParamType.isRestrictQualified())
+      Attributes |= llvm::Attribute::NoAlias;
+
     switch (AI.getKind()) {
     case ABIArgInfo::Coerce:
       break;