[llvm] [AMDGPU] Generate s_lshl?_add_u32 (PR #167032)

[via llvm-commits]

================
@@ -0,0 +1,90 @@
+; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 6
+; RUN: llc -mtriple=amdgcn -mcpu=gfx1200 -stop-after=si-fix-sgpr-copies < %s | FileCheck %s
----------------
LU-JOHN wrote:

Looking at the move-to-valu*.ll tests, about half run to the end and half stop after si-fix-sgpr-copies.  Which way is preferred?

https://github.com/llvm/llvm-project/pull/167032