[llvm] [DXIL][Analysis] Add DXILMetadataAnalysis pass (PR #102079)

[S. Bharadwaj Yadavalli via llvm-commits]

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@@ -0,0 +1,93 @@
+//=- DXILMetadataAnalysis.cpp - Representation of Module metadata -*- C++ -*=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/DXILMetadataAnalysis.h"
+#include "llvm/ADT/APInt.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/Metadata.h"
+#include "llvm/IR/Module.h"
+#include "llvm/InitializePasses.h"
+
+#define DEBUG_TYPE "dxil-metadata"
+
+using namespace llvm;
+using namespace dxil;
+
+void ModuleMetadataInfo::dump(raw_ostream &OS) {
+  OS << "Shader Model : " << Triple::getOSTypeName(ShaderModel) << "\n";
+  OS << "DXIL Version : " << DXILVersion.getAsString() << "\n";
+  OS << "Shader Stage : " << Triple::getEnvironmentTypeName(ShaderStage)
+     << "\n";
+}
+//===----------------------------------------------------------------------===//
+// DXILMetadataAnalysis and DXILMetadataAnalysisPrinterPass
+
+// Provide an explicit template instantiation for the static ID.
+AnalysisKey DXILMetadataAnalysis::Key;
+
+llvm::dxil::ModuleMetadataInfo
+DXILMetadataAnalysis::run(Module &M, ModuleAnalysisManager &AM) {
+  ModuleMetadataInfo Data;
+  return Data;
+}
+
+PreservedAnalyses
+DXILMetadataAnalysisPrinterPass::run(Module &M, ModuleAnalysisManager &AM) {
+  llvm::dxil::ModuleMetadataInfo &Data = AM.getResult<DXILMetadataAnalysis>(M);
+
+  Data.dump(OS);
+  return PreservedAnalyses::all();
+}
+
+//===----------------------------------------------------------------------===//
+// DXILMetadataAnalysisWrapperPass
+
+DXILMetadataAnalysisWrapperPass::DXILMetadataAnalysisWrapperPass()
+    : ModulePass(ID) {
+  initializeDXILMetadataAnalysisWrapperPassPass(
+      *PassRegistry::getPassRegistry());
+}
+
+DXILMetadataAnalysisWrapperPass::~DXILMetadataAnalysisWrapperPass() = default;
+
+void DXILMetadataAnalysisWrapperPass::getAnalysisUsage(
+    AnalysisUsage &AU) const {
+  AU.setPreservesAll();
+}
+
+bool DXILMetadataAnalysisWrapperPass::runOnModule(Module &M) {
+  ModuleMetadata.reset(new llvm::dxil::ModuleMetadataInfo());
+  Triple TT(Triple(M.getTargetTriple()));
+  ModuleMetadata->DXILVersion = TT.getDXILVersion();
+  ModuleMetadata->ShaderModel = TT.getOS();
+  ModuleMetadata->ShaderStage = TT.getEnvironment();
----------------
bharadwajy wrote:

> We shouldn't put the logic for the old PM pass in the runOnModule method itself. We need to break out a helper that can be used by both the old and new PM.

Changed.

https://github.com/llvm/llvm-project/pull/102079