[llvm] [AMDGPU] Be less optimistic when allocating module scope lds (PR #161464)

[Jon Chesterfield via llvm-commits]

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@@ -647,7 +649,8 @@ class AMDGPULowerModuleLDS {
           ModuleScopeVariables.insert(GV);
         } else if (K.second.size() == 1) {
           KernelAccessVariables.insert(GV);
-        } else if (set_is_subset(K.second, HybridModuleRootKernels)) {
+        } else if (K.second.size() == HybridModuleRootKernelsSize &&
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JonChesterfield wrote:

That's the semantic intent certainly, it's looking for equality between the sets. I'll check what DenseSet::operator== does

https://github.com/llvm/llvm-project/pull/161464