[llvm] [DAG] Reducing instructions by better legalization handling of AVGFLOORU for i128 data types (PR #99913)

[Simon Pilgrim via llvm-commits]

================
@@ -0,0 +1,126 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=aarch64 < %s | FileCheck %s
----------------
RKSimon wrote:

are you intending to work on other midpoint / avg i128 handling? If not you should rename these avgflooru-i128.ll

https://github.com/llvm/llvm-project/pull/99913