[llvm] [SelectionDAG] Add support for the 3-way comparison intrinsics [US]CMP (PR #91871)

[via llvm-commits]

================
@@ -0,0 +1,985 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s
----------------
Poseydon42 wrote:

Done

https://github.com/llvm/llvm-project/pull/91871