[llvm] [AMDGPU] Use table strategy for LowerModuleLDSPass at O0 (PR #160181)

[Matt Arsenault via llvm-commits]

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@@ -648,7 +649,19 @@ class AMDGPULowerModuleLDS {
         } else if (K.second.size() == 1) {
           KernelAccessVariables.insert(GV);
         } else if (set_is_subset(K.second, HybridModuleRootKernels)) {
-          ModuleScopeVariables.insert(GV);
+          uint64_t LocalMemLimit = 0;
+          for (Function &F : M) {
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arsenm wrote:

Comment what this is doing 

https://github.com/llvm/llvm-project/pull/160181