[llvm] [AMDGPU] Disable s_add_pc_i64 instruction (PR #175644)

[Stanislav Mekhanoshin via llvm-commits]

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@@ -1527,6 +1527,12 @@ def FeatureWaitsBeforeSystemScopeStores : SubtargetFeature<
   "Target requires waits for loads and atomics before system scope stores"
 >;
 
+def FeatureAddPC64Inst : SubtargetFeature<"enable-add-pc64-inst",
+  "HasEnableAddPC64Inst",
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rampitec wrote:

'HasEnable' sounds strange. Just 'Enable'?

https://github.com/llvm/llvm-project/pull/175644