[llvm] [AMDGPU] Support image atomic no return instructions (PR #150742)

Thu Sep 18 06:27:12 PDT 2025

================
@@ -990,95 +990,96 @@ multiclass MIMG_Atomic_Addr_Helper_m <mimgopc op, string asm,
                                       RegisterOperand data_rc,
                                       bit enableDasm = 0,
                                       bit isFP = 0,
+                                      bit noRtn = 0,
                                       string renamed = ""> {
   let hasSideEffects = 1, // FIXME: remove this
       mayLoad = 1, mayStore = 1, hasPostISelHook = 0, DisableWQM = 1,
       FPAtomic = isFP in {
     let VAddrDwords = 1 in {
       let ssamp = 0 in {
         if op.HAS_SI then {
-          def _V1_si : MIMG_Atomic_si <op, asm, data_rc, VGPR_32, enableDasm>;
+          def _V1_si : MIMG_Atomic_si <op, asm, data_rc, VGPR_32, noRtn,enableDasm>;
----------------
mbrkusanin wrote:

```suggestion
          def _V1_si : MIMG_Atomic_si <op, asm, data_rc, VGPR_32, noRtn, enableDasm>;
```

https://github.com/llvm/llvm-project/pull/150742
