[llvm] [RemoveDIs] Add release note for C API changes (PR #92396)

[Orlando Cazalet-Hyams via llvm-commits]

https://github.com/OCHyams created https://github.com/llvm/llvm-project/pull/92396

The changes have been documented in the migration guide [llvm/docs/RemoveDIsDebugInfo.md](https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes) - add the info to the release notes.

>From 6abd8e2930ce0a8cbdd5be88583351f7b0e229c6 Mon Sep 17 00:00:00 2001
From: Orlando Cazalet-Hyams <orlando.hyams at sony.com>
Date: Thu, 16 May 2024 13:54:54 +0100
Subject: [PATCH] c-api rel notes

---
 llvm/docs/ReleaseNotes.rst | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index 84320461fa9e1..ac5e0d2fd6c55 100644
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -180,6 +180,27 @@ Changes to the C API
   * ``LLVMGetCallBrNumIndirectDests``
   * ``LLVMGetCallBrIndirectDest``
 
+* Added the following functions for querying and setting the debug info format and for explicitly building either debug intrinsics (old format) or records (new format). These functions will be deprecated and removed in the future as we move towards removing support for the old debug format. See the `debug info migration guide <https://llvm.org/docs/RemoveDIsDebugInfo.html>`_ for more info.
+
+  * ``LLVMIsNewDbgInfoFormat``
+  * ``LLVMSetIsNewDbgInfoFormat``
+  * ``LLVMDIBuilderInsertDeclareIntrinsicBefore``
+  * ``LLVMDIBuilderInsertDeclareIntrinsicAtEnd``
+  * ``LLVMDIBuilderInsertDbgValueIntrinsicBefore``
+  * ``LLVMDIBuilderInsertDbgValueIntrinsicAtEnd``
+  * ``LLVMDIBuilderInsertDeclareRecordBefore``
+  * ``LLVMDIBuilderInsertDeclareRecordAtEnd``
+  * ``LLVMDIBuilderInsertDbgValueRecordBefore``
+  * ``LLVMDIBuilderInsertDbgValueRecordAtEnd``
+
+* Modified the following functions which now always insert debug records (new debug info format) rather than debug intrinsics (old debug info format). See the `debug info migration guide <https://llvm.org/docs/RemoveDIsDebugInfo.html>`_ for more info.
+
+  * ``LLVMDIBuilderInsertDeclareBefore``
+  * ``LLVMDIBuilderInsertDeclareBefore``
+  * ``LLVMDIBuilderInsertDeclareAtEnd``
+  * ``LLVMDIBuilderInsertDbgValueBefore``
+  * ``LLVMDIBuilderInsertDbgValueAtEnd``
+
 Changes to the CodeGen infrastructure
 -------------------------------------