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

[Harrison Hao via llvm-commits]

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@@ -1091,12 +1092,13 @@ multiclass MIMG_Atomic_Addr_Helper_m <mimgopc op, string asm,
     }
 }
 
-multiclass MIMG_Atomic <mimgopc op, string asm, bit isCmpSwap = 0, bit isFP = 0,
-                        string renamed = ""> { // 64-bit atomics
-  let IsAtomicRet = 1 in {
+multiclass MIMG_Atomic_Impl <mimgopc op, string asm, bit isCmpSwap = 0, bit isFP = 0,
+                        bit noRtn = 0, string renamed = ""> { // 64-bit atomics
+  let IsAtomicRet = !if(noRtn, 0, 1) in {
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harrisonGPU wrote:

Done.

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