[llvm] [AMDGPU] Support lowering of cluster related instrinsics (PR #157978)

[Stanislav Mekhanoshin via llvm-commits]

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@@ -7577,14 +7730,64 @@ bool AMDGPULegalizerInfo::legalizeIntrinsic(LegalizerHelper &Helper,
     return legalizeWorkitemIDIntrinsic(MI, MRI, B, 2,
                                        AMDGPUFunctionArgInfo::WORKITEM_ID_Z);
   case Intrinsic::amdgcn_workgroup_id_x:
-    return legalizePreloadedArgIntrin(MI, MRI, B,
-                                      AMDGPUFunctionArgInfo::WORKGROUP_ID_X);
+    return legalizeWorkGroupId(
+        MI, B, AMDGPUFunctionArgInfo::WORKGROUP_ID_X,
+        AMDGPUFunctionArgInfo::CLUSTER_WORKGROUP_MAX_ID_X,
+        AMDGPUFunctionArgInfo::CLUSTER_WORKGROUP_ID_X);
   case Intrinsic::amdgcn_workgroup_id_y:
-    return legalizePreloadedArgIntrin(MI, MRI, B,
-                                      AMDGPUFunctionArgInfo::WORKGROUP_ID_Y);
+    return legalizeWorkGroupId(
+        MI, B, AMDGPUFunctionArgInfo::WORKGROUP_ID_Y,
+        AMDGPUFunctionArgInfo::CLUSTER_WORKGROUP_MAX_ID_Y,
+        AMDGPUFunctionArgInfo::CLUSTER_WORKGROUP_ID_Y);
   case Intrinsic::amdgcn_workgroup_id_z:
-    return legalizePreloadedArgIntrin(MI, MRI, B,
+    return legalizeWorkGroupId(
+        MI, B, AMDGPUFunctionArgInfo::WORKGROUP_ID_Z,
+        AMDGPUFunctionArgInfo::CLUSTER_WORKGROUP_MAX_ID_Z,
+        AMDGPUFunctionArgInfo::CLUSTER_WORKGROUP_ID_Z);
+  case Intrinsic::amdgcn_cluster_id_x:
+    return ST.hasGFX1250Insts() &&
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rampitec wrote:

Should this all use `ST.hasClusters()`?

https://github.com/llvm/llvm-project/pull/157978