[DXIL][Analysis] Boilerplate for DXILResourceAnalysis pass

Broke this out into its own commit to make the next one easier to
review.

Pull Request: llvm#100700

Author: bogner

llvm/include/llvm/Analysis/DXILResource.h

@@ -9,10 +9,14 @@
 #ifndef LLVM_ANALYSIS_DXILRESOURCE_H
 #define LLVM_ANALYSIS_DXILRESOURCE_H
 
+#include "llvm/ADT/MapVector.h"
+#include "llvm/IR/PassManager.h"
 #include "llvm/IR/Value.h"
+#include "llvm/Pass.h"
 #include "llvm/Support/DXILABI.h"
 
 namespace llvm {
+class CallInst;
 class MDTuple;
 
 namespace dxil {
@@ -214,6 +218,53 @@ class ResourceInfo {
 };
 
 } // namespace dxil
+
+using DXILResourceMap = MapVector<CallInst *, dxil::ResourceInfo>;
+
+class DXILResourceAnalysis : public AnalysisInfoMixin<DXILResourceAnalysis> {
+  friend AnalysisInfoMixin<DXILResourceAnalysis>;
+
+  static AnalysisKey Key;
+
+public:
+  using Result = DXILResourceMap;
+
+  /// Gather resource info for the module \c M.
+  DXILResourceMap run(Module &M, ModuleAnalysisManager &AM);
+};
+
+/// Printer pass for the \c DXILResourceAnalysis results.
+class DXILResourcePrinterPass : public PassInfoMixin<DXILResourcePrinterPass> {
+  raw_ostream &OS;
+
+public:
+  explicit DXILResourcePrinterPass(raw_ostream &OS) : OS(OS) {}
+
+  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+
+  static bool isRequired() { return true; }
+};
+
+class DXILResourceWrapperPass : public ModulePass {
+  std::unique_ptr<DXILResourceMap> ResourceMap;
+
+public:
+  static char ID; // Class identification, replacement for typeinfo
+
+  DXILResourceWrapperPass();
+  ~DXILResourceWrapperPass() override;
+
+  const DXILResourceMap &getResourceMap() const { return *ResourceMap; }
+  DXILResourceMap &getResourceMap() { return *ResourceMap; }
+
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+  bool runOnModule(Module &M) override;
+  void releaseMemory() override;
+
+  void print(raw_ostream &OS, const Module *M) const override;
+  void dump() const;
+};
+
 } // namespace llvm
 
 #endif // LLVM_ANALYSIS_DXILRESOURCE_H

llvm/include/llvm/InitializePasses.h

@@ -82,6 +82,7 @@ void initializeCycleInfoWrapperPassPass(PassRegistry &);
 void initializeDAEPass(PassRegistry&);
 void initializeDAHPass(PassRegistry&);
 void initializeDCELegacyPassPass(PassRegistry&);
+void initializeDXILResourceWrapperPassPass(PassRegistry &);
 void initializeDeadMachineInstructionElimPass(PassRegistry&);
 void initializeDebugifyMachineModulePass(PassRegistry &);
 void initializeDependenceAnalysisWrapperPassPass(PassRegistry&);

llvm/lib/Analysis/DXILResource.cpp

@@ -9,7 +9,11 @@
 #include "llvm/Analysis/DXILResource.h"
 #include "llvm/ADT/APInt.h"
 #include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Instructions.h"
 #include "llvm/IR/Metadata.h"
+#include "llvm/InitializePasses.h"
+
+#define DEBUG_TYPE "dxil-resource"
 
 using namespace llvm;
 using namespace dxil;
@@ -326,4 +330,73 @@ std::pair<uint32_t, uint32_t> ResourceInfo::getAnnotateProps() const {
   return {Word0, Word1};
 }
 
-#define DEBUG_TYPE "dxil-resource"
+//===----------------------------------------------------------------------===//
+// DXILResourceAnalysis and DXILResourcePrinterPass
+
+// Provide an explicit template instantiation for the static ID.
+AnalysisKey DXILResourceAnalysis::Key;
+
+DXILResourceMap DXILResourceAnalysis::run(Module &M,
+                                          ModuleAnalysisManager &AM) {
+  DXILResourceMap Data;
+  return Data;
+}
+
+PreservedAnalyses DXILResourcePrinterPass::run(Module &M,
+                                               ModuleAnalysisManager &AM) {
+  DXILResourceMap &Data =
+      AM.getResult<DXILResourceAnalysis>(M);
+
+  for (const auto &[Handle, Info] : Data) {
+    OS << "Binding for ";
+    Handle->print(OS);
+    OS << "\n";
+    // TODO: Info.print(OS);
+    OS << "\n";
+  }
+
+  return PreservedAnalyses::all();
+}
+
+//===----------------------------------------------------------------------===//
+// DXILResourceWrapperPass
+
+DXILResourceWrapperPass::DXILResourceWrapperPass() : ModulePass(ID) {
+  initializeDXILResourceWrapperPassPass(*PassRegistry::getPassRegistry());
+}
+
+DXILResourceWrapperPass::~DXILResourceWrapperPass() = default;
+
+void DXILResourceWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const {
+  AU.setPreservesAll();
+}
+
+bool DXILResourceWrapperPass::runOnModule(Module &M) {
+  ResourceMap.reset(new DXILResourceMap());
+  return false;
+}
+
+void DXILResourceWrapperPass::releaseMemory() { ResourceMap.reset(); }
+
+void DXILResourceWrapperPass::print(raw_ostream &OS, const Module *) const {
+  if (!ResourceMap) {
+    OS << "No resource map has been built!\n";
+    return;
+  }
+  for (const auto &[Handle, Info] : *ResourceMap) {
+    OS << "Binding for ";
+    Handle->print(OS);
+    OS << "\n";
+    // TODO: Info.print(OS);
+    OS << "\n";
+  }
+}
+
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+LLVM_DUMP_METHOD
+void DXILResourceWrapperPass::dump() const { print(dbgs(), nullptr); }
+#endif
+
+INITIALIZE_PASS(DXILResourceWrapperPass, DEBUG_TYPE, "DXIL Resource analysis",
+                false, true)
+char DXILResourceWrapperPass::ID = 0;

llvm/lib/Passes/PassBuilder.cpp

@@ -31,6 +31,7 @@
 #include "llvm/Analysis/CycleAnalysis.h"
 #include "llvm/Analysis/DDG.h"
 #include "llvm/Analysis/DDGPrinter.h"
+#include "llvm/Analysis/DXILResource.h"
 #include "llvm/Analysis/Delinearization.h"
 #include "llvm/Analysis/DemandedBits.h"
 #include "llvm/Analysis/DependenceAnalysis.h"

llvm/lib/Passes/PassRegistry.def

@@ -20,6 +20,7 @@
 #endif
 MODULE_ANALYSIS("callgraph", CallGraphAnalysis())
 MODULE_ANALYSIS("collector-metadata", CollectorMetadataAnalysis())
+MODULE_ANALYSIS("dxil-resource", DXILResourceAnalysis())
 MODULE_ANALYSIS("inline-advisor", InlineAdvisorAnalysis())
 MODULE_ANALYSIS("ir-similarity", IRSimilarityAnalysis())
 MODULE_ANALYSIS("lcg", LazyCallGraphAnalysis())
@@ -115,6 +116,7 @@ MODULE_PASS("print-must-be-executed-contexts",
             MustBeExecutedContextPrinterPass(dbgs()))
 MODULE_PASS("print-profile-summary", ProfileSummaryPrinterPass(dbgs()))
 MODULE_PASS("print-stack-safety", StackSafetyGlobalPrinterPass(dbgs()))
+MODULE_PASS("print<dxil-resource>", DXILResourcePrinterPass(dbgs()))
 MODULE_PASS("print<inline-advisor>", InlineAdvisorAnalysisPrinterPass(dbgs()))
 MODULE_PASS("print<module-debuginfo>", ModuleDebugInfoPrinterPass(dbgs()))
 MODULE_PASS("pseudo-probe", SampleProfileProbePass(TM))