[docs] Release notes for DIModule metadata

Updated the release notes for the changes in the DIModule metadata.

Reviewed By: aprantl

Differential Revision: https://reviews.llvm.org/D80614

diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index b47222e..a55d14c 100644 (file)
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -70,6 +70,10 @@ Changes to the LLVM IR
   behavior was undocumented. To preserve optimizations, frontends may need to
   be updated to generate appropriate `align` attributes and metadata.
 
+* The DIModule metadata is extended to contain file and line number
+  information. This information is used to represent Fortran modules debug
+  info at IR level.
+
 Changes to building LLVM
 ------------------------