[llvm] Reapply "[AMDGPU] Always lower s/udiv64 by constant to MUL" (PR #101942)

[David Green via llvm-commits]

================
@@ -0,0 +1,56 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc < %s -mtriple=arm--linux-gnueabihf -mcpu= -mattr=+neon | FileCheck %s
----------------
davemgreen wrote:

I'm not sure what -mcpu= does, but can it be removed? And can you use armv7--linux-gnueabihf if it still shows the same issue.

https://github.com/llvm/llvm-project/pull/101942