[llvm-branch-commits] [llvm] [AMDGPU][SIMemoryLegalizer] Lower single-wave workgroup scope to wavefront in absence of LDSDMA (PR #224065)

[Pierre van Houtryve via llvm-branch-commits]

================
@@ -824,9 +831,15 @@ SIAtomicAddrSpace SIMemOpAccess::toSIAtomicAddrSpace(unsigned AS) const {
   return SIAtomicAddrSpace::OTHER;
 }
 
+// TODO: Consider moving single-wave workgroup->wavefront scope relaxation to an
----------------
Pierre-vh wrote:

> I don't really see a difference between this and reducing an arithmetic operation to a bitwise operation. The user intended to divide by two, but the implementation replaced it with a shift in the IR under the right conditions

Yeah that's a pretty strong argument. I am not sure why I see it differently 🤷  

https://github.com/llvm/llvm-project/pull/224065