[llvm-branch-commits] [llvm] 3b6f4c5 - [ReleaseNotes] Mention freeze instruction

[Juneyoung Lee via llvm-branch-commits]

Author: Juneyoung Lee
Date: 2020-02-27T21:41:48+09:00
New Revision: 3b6f4c544be48dcfa663cfb62da3fd4e779954a5

URL: https://github.com/llvm/llvm-project/commit/3b6f4c544be48dcfa663cfb62da3fd4e779954a5
DIFF: https://github.com/llvm/llvm-project/commit/3b6f4c544be48dcfa663cfb62da3fd4e779954a5.diff

LOG: [ReleaseNotes] Mention freeze instruction

Reviewers: hans, nlopes, regehr

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D75226

Added: 
    

Modified: 
    llvm/docs/ReleaseNotes.rst

Removed: 
    


################################################################################
diff  --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index 69a055aeef63..a788f8f60042 100644
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -86,8 +86,8 @@ Non-comprehensive list of changes in this release
 
 
 * Windows Control Flow Guard: the ``-cfguard`` option now emits CFG checks on
-  indirect function calls. The previous behavior is still available with the 
-  ``-cfguard-nochecks`` option. Note that this feature should always be used 
+  indirect function calls. The previous behavior is still available with the
+  ``-cfguard-nochecks`` option. Note that this feature should always be used
   with optimizations enabled.
 
 * ``Callbacks`` have been added to ``CommandLine Options``.  These can
@@ -123,6 +123,10 @@ Changes to the LLVM IR
   that correctly converted 80-90% of Clang tests. Some manual work will almost
   certainly still be needed.
 
+* A new `freeze` instruction is added. The `freeze` instruction is used to stop
+  IR-level propagation of undef and poison values. Currently its support is
+  preliminary; a freeze-equivalent operation for SelDag/MIR needs to be added.
+
 
 Changes to building LLVM
 ------------------------