[PATCH] D28746: Mention ThinLTO with PGO in ReleaseNotes 4.0

[Piotr Padlewski via Phabricator via cfe-commits]

Prazek updated this revision to Diff 84503.
Prazek added a comment.

update


https://reviews.llvm.org/D28746

Files:
  docs/ReleaseNotes.rst


Index: docs/ReleaseNotes.rst
===================================================================
--- docs/ReleaseNotes.rst
+++ docs/ReleaseNotes.rst
@@ -63,9 +63,18 @@
            indirect(a, n);
        }
 
-
 -  ...
 
+Improvements to ThinLTO (-flto=thin)
+------------------------------------
+  - Integration with profile data. When available, profile data enables more
+    accurate function importing decisions, as well as cross-module indirect call
+    promotion.
+  - Significant build-time and binary-size improvements when compiling with
+    debug info (-g).
+
+
+
 Improvements to Clang's diagnostics
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 


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