diff --git a/llvm/docs/LangRef.rst b/llvm/docs/LangRef.rst
--- a/llvm/docs/LangRef.rst
+++ b/llvm/docs/LangRef.rst
@@ -1635,7 +1635,11 @@
     memory on it's behalf.  As a result, perhaps surprisingly, a ``nofree``
     function can return a pointer to a previously deallocated memory object.
 ``noimplicitfloat``
-    This attributes disables implicit floating-point instructions.
+    Disallows implicit floating-point code. This inhibits optimizations that
+    use floating-point code and floating-point/SIMD/vector registers for
+    operations that are not nominally floating-point. LLVM instructions that
+    perform floating-point operations or require access to floating-point
+    registers may still cause floating-point code to be generated.
 ``noinline``
     This attribute indicates that the inliner should never inline this
     function in any situation. This attribute may not be used together