[llvm] [NewPM][AMDGPU] Add AMDGPUPassRegistry.def (PR #86095)

[Matt Arsenault via llvm-commits]

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@@ -631,107 +631,26 @@ void AMDGPUTargetMachine::registerDefaultAliasAnalyses(AAManager &AAM) {
   AAM.registerFunctionAnalysis<AMDGPUAA>();
 }
 
+static Expected<ScanOptions>
+parseAMDGPUAtomicOptimizerStrategy(StringRef Params) {
+  if (Params.consume_front("strategy=")) {
+    if (Params == "dpp")
+      return ScanOptions::DPP;
+    if (Params == "iterative")
+      return ScanOptions::Iterative;
+    if (Params == "none")
+      return ScanOptions::None;
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arsenm wrote:

Could turn this into StringSwitch 

https://github.com/llvm/llvm-project/pull/86095