[PATCH] D82316: [LangRef] Add `noundef` attribute to documentation

[Gui Andrade via Phabricator via llvm-commits]

guiand updated this revision to Diff 273869.
guiand added a comment.

Addressed comments


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D82316/new/

https://reviews.llvm.org/D82316

Files:
  llvm/docs/BitCodeFormat.rst
  llvm/docs/LangRef.rst


Index: llvm/docs/LangRef.rst
===================================================================
--- llvm/docs/LangRef.rst
+++ llvm/docs/LangRef.rst
@@ -1252,6 +1252,12 @@
     only valid on intrinsic declarations and cannot be applied to a
     call site or arbitrary function.
 
+``noundef``
+    This attribute applies to parameters and return values. If the value
+    representation contains any undefined or poison bits, the behavior is
+    undefined. Note that this does not refer to padding introduced by the
+    type's storage representation.
+
 .. _gc:
 
 Garbage Collector Strategy Names
@@ -3656,6 +3662,11 @@
 -  The condition operand of a :ref:`br <i_br>` instruction.
 -  The callee operand of a :ref:`call <i_call>` or :ref:`invoke <i_invoke>`
    instruction.
+-  The parameter operand of a :ref:`call <i_call>` or :ref:`invoke <i_invoke>`
+   instruction, when the function or invoking call site has a ``noundef``
+   attribute in the corresponding position.
+-  The operand of a :ref:`ret <i_ret>` instruction if the function or invoking
+   call site has a `noundef` attribute in the return value position.
 
 Here are some examples:
 
Index: llvm/docs/BitCodeFormat.rst
===================================================================
--- llvm/docs/BitCodeFormat.rst
+++ llvm/docs/BitCodeFormat.rst
@@ -1067,6 +1067,7 @@
 * code 65: ``preallocated``
 * code 66: ``no_merge``
 * code 67: ``null_pointer_is_valid``
+* code 68: ``noundef``
 
 .. note::
   The ``allocsize`` attribute has a special encoding for its arguments. Its two


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