[PATCH] D42860: [ReleaseNotes] Add note for the new -fexperimental-isel flag.

[Amara Emerson via Phabricator via cfe-commits]

aemerson created this revision.
aemerson added reviewers: hans, qcolombet.

Add note for the new -fexperimental-isel flag.


Repository:
  rC Clang

https://reviews.llvm.org/D42860

Files:
  docs/ReleaseNotes.rst


Index: docs/ReleaseNotes.rst
===================================================================
--- docs/ReleaseNotes.rst
+++ docs/ReleaseNotes.rst
@@ -132,6 +132,11 @@
   difference between the ``-std=c17`` and ``-std=c11`` language modes is the
   value of the ``__STDC_VERSION__`` macro, as C17 is a bug fix release.
 
+- Added the ``-fexperimental-isel`` and ``-fno-experimental-isel`` flags to
+  enable/disable the new GlobalISel instruction selection framework. This
+  feature is enabled by default for AArch64 at the ``-O0`` optimization level.
+  Support for other targets or optimization levels is currently incomplete.
+
 Deprecated Compiler Flags
 -------------------------
 


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