[clang] 1b4fe26 - [clang][x86] Add release note entries describing recent work to making SSE intrinsics generic and usable with constexpr (#154737)

[via cfe-commits]

Author: Simon Pilgrim
Date: 2025-08-22T09:59:10+01:00
New Revision: 1b4fe26343df9c3b37b0cee08f0cd8cee0868181

URL: https://github.com/llvm/llvm-project/commit/1b4fe26343df9c3b37b0cee08f0cd8cee0868181
DIFF: https://github.com/llvm/llvm-project/commit/1b4fe26343df9c3b37b0cee08f0cd8cee0868181.diff

LOG: [clang][x86] Add release note entries describing recent work to making SSE intrinsics generic and usable with constexpr (#154737)

I haven't created an exhaustive list of intrinsic changes, but I suppose I could if people see a strong need for it.

Added: 
    

Modified: 
    clang/docs/ReleaseNotes.rst

Removed: 
    


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diff  --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index c07b91e899b02..0d85b6f426995 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -309,6 +309,13 @@ NVPTX Support
 
 X86 Support
 ^^^^^^^^^^^
+- More SSE, AVX and AVX512 intrinsics, including initializers and general
+  arithmetic can now be used in C++ constant expressions.
+- Some SSE, AVX and AVX512 intrinsics have been converted to wrap
+  generic __builtin intrinsics.
+- NOTE: Please avoid use of the __builtin_ia32_* intrinsics - these are not 
+  guaranteed to exist in future releases, or match behaviour with previous
+  releases of clang or other compilers.
 
 Arm and AArch64 Support
 ^^^^^^^^^^^^^^^^^^^^^^^