diff --git a/llvm/docs/LangRef.rst b/llvm/docs/LangRef.rst
--- a/llvm/docs/LangRef.rst
+++ b/llvm/docs/LangRef.rst
@@ -13953,10 +13953,12 @@
 
 is equivalent to the expression a \* b + c, except that rounding will
 not be performed between the multiplication and addition steps if the
-code generator fuses the operations. Fusion is not guaranteed, even if
-the target platform supports it. If a fused multiply-add is required, the
-corresponding :ref:`llvm.fma <int_fma>` intrinsic function should be used
-instead. This never sets errno, just as '``llvm.fma.*``'.
+code generator fuses the operations. The optimizer can treat `@llvm.fmuladd`
+as `fadd (fmul %a, %b), %c`, until the code generator replaces it with
+a fused multiply-add. Fusion is not guaranteed, even if the target
+platform supports it. If a fused multiply-add is required, the corresponding
+:ref:`llvm.fma <int_fma>` intrinsic function should be used instead.
+This never sets errno, just as '``llvm.fma.*``'.
 
 Examples:
 """""""""