diff --git a/llvm/docs/LangRef.rst b/llvm/docs/LangRef.rst
--- a/llvm/docs/LangRef.rst
+++ b/llvm/docs/LangRef.rst
@@ -21508,8 +21508,8 @@
 """"""""""
 
 The '``llvm.vp.ceil``' intrinsic performs floating-point ceiling
-(:ref:`ceil <int_ceil>`) of the first vector operand on each enabled lane.  The
-result on disabled lanes is undefined.
+(:ref:`ceil <int_ceil>`) of the first vector operand on each enabled lane. The
+result on disabled lanes is a :ref:`poison value <poisonvalues>`.
 
 Examples:
 """""""""
@@ -21555,8 +21555,8 @@
 """"""""""
 
 The '``llvm.vp.floor``' intrinsic performs floating-point floor
-(:ref:`floor <int_floor>`) of the first vector operand on each enabled lane.  The
-result on disabled lanes is undefined.
+(:ref:`floor <int_floor>`) of the first vector operand on each enabled lane.
+The result on disabled lanes is a :ref:`poison value <poisonvalues>`.
 
 Examples:
 """""""""
@@ -21602,8 +21602,8 @@
 """"""""""
 
 The '``llvm.vp.round``' intrinsic performs floating-point round
-(:ref:`round <int_round>`) of the first vector operand on each enabled lane.  The
-result on disabled lanes is undefined.
+(:ref:`round <int_round>`) of the first vector operand on each enabled lane.
+The result on disabled lanes is a :ref:`poison value <poisonvalues>`.
 
 Examples:
 """""""""
@@ -21649,8 +21649,8 @@
 """"""""""
 
 The '``llvm.vp.roundeven``' intrinsic performs floating-point roundeven
-(:ref:`roundeven <int_roundeven>`) of the first vector operand on each enabled lane.  The
-result on disabled lanes is undefined.
+(:ref:`roundeven <int_roundeven>`) of the first vector operand on each enabled
+lane. The result on disabled lanes is a :ref:`poison value <poisonvalues>`.
 
 Examples:
 """""""""