[llvm] [AMDGPU] Rewrite SADDR memory ops to VADDR reduce xcnt stalls (PR #190654)

[Matt Arsenault via llvm-commits]

================
@@ -1823,6 +1825,8 @@ bool GCNPassConfig::addRegAssignAndRewriteFast() {
   addPass(&SILowerWWMCopiesLegacyID);
   addPass(&AMDGPUReserveWWMRegsLegacyID);
 
+  addPass(&SIFixXcntStallSAddrReuseLegacyID);
----------------
arsenm wrote:

Don't bother adding for O0 

https://github.com/llvm/llvm-project/pull/190654