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-rw-r--r--src/rustllvm/rustllvm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/rustllvm/rustllvm.h b/src/rustllvm/rustllvm.h
index 933266b4025..a9d267cdb31 100644
--- a/src/rustllvm/rustllvm.h
+++ b/src/rustllvm/rustllvm.h
@@ -85,6 +85,7 @@ enum LLVMRustAttribute {
   SanitizeMemory = 22,
   NonLazyBind = 23,
   OptimizeNone = 24,
+  ReturnsTwice = 25,
 };
 
 typedef struct OpaqueRustString *RustStringRef;