[llvm] [AMDGPU] Move LDS utilities from amdgpu-lower-module-lds pass to AMDGPUMemoryUtils (PR #88002)

[Matt Arsenault via llvm-commits]

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@@ -19,14 +22,40 @@ class LoadInst;
 class MemoryDef;
 class MemorySSA;
 class Value;
+class Function;
+class CallGraph;
+class Module;
 
 namespace AMDGPU {
 
+using FunctionVariableMap = DenseMap<Function *, DenseSet<GlobalVariable *>>;
+using VariableFunctionMap = DenseMap<GlobalVariable *, DenseSet<Function *>>;
+
 Align getAlign(DataLayout const &DL, const GlobalVariable *GV);
 
 bool isDynamicLDS(const GlobalVariable &GV);
 bool isLDSVariableToLower(const GlobalVariable &GV);
 
+struct LDSUsesInfoTy {
+  FunctionVariableMap direct_access;
+  FunctionVariableMap indirect_access;
+};
+
+bool eliminateConstantExprUsesOfLDSFromAllInstructions(Module &M);
+
+void getUsesOfLDSByFunction(CallGraph const &CG, Module &M,
+                            FunctionVariableMap &kernels,
+                            FunctionVariableMap &functions);
+
+bool isKernelLDS(const Function *F);
+
+LDSUsesInfoTy getTransitiveUsesOfLDS(CallGraph const &CG, Module &M);
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arsenm wrote:

Fix east consts 

https://github.com/llvm/llvm-project/pull/88002