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-rw-r--r--docs/LangRef.rst5
1 files changed, 5 insertions, 0 deletions
diff --git a/docs/LangRef.rst b/docs/LangRef.rst
index cf9a8c0..c863090 100644
--- a/docs/LangRef.rst
+++ b/docs/LangRef.rst
@@ -720,6 +720,11 @@ Currently, only the following parameter attributes are defined:
This indicates that the pointer parameter can be excised using the
:ref:`trampoline intrinsics <int_trampoline>`. This is not a valid
attribute for return values.
+``nobuiltin``
+ This indicates that the callee function at a call site is not
+ recognized as a built-in function. LLVM will retain the original call
+ and not replace it with equivalent code based on the semantics of the
+ built-in function.
.. _gc: