2 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_llvm/llvm-wrapper/LLVMWrapper.h b/compiler/rustc_llvm/llvm-wrapper/LLVMWrapper.h
index e2ce7da0e84..9e0a9b354e1 100644
--- a/compiler/rustc_llvm/llvm-wrapper/LLVMWrapper.h
+++ b/compiler/rustc_llvm/llvm-wrapper/LLVMWrapper.h
@@ -82,6 +82,7 @@ enum LLVMRustAttribute {
   StackProtectReq = 30,
   StackProtectStrong = 31,
   StackProtect = 32,
+  NoUndef = 33,
 };
 
 typedef struct OpaqueRustString *RustStringRef;
diff --git a/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
index d871290744f..fb9c5e6a527 100644
--- a/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
@@ -224,6 +224,8 @@ static Attribute::AttrKind fromRust(LLVMRustAttribute Kind) {
     return Attribute::StackProtectStrong;
   case StackProtect:
     return Attribute::StackProtect;
+  case NoUndef:
+    return Attribute::NoUndef;
   }
   report_fatal_error("bad AttributeKind");
 }