[llvm] [SandboxIR] PassManager (PR #107932)

[via llvm-commits]

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@@ -0,0 +1,74 @@
+//===- PassManager.h --------------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Registers and executes the Sandbox IR passes.
+//
+// The pass manager contains an ordered sequence of passes that it runs in
+// order. The passes are not owned by the pass manager because a pass may be
+// inserted multiple times in one or more pass managers.
+// Note that in this design a pass manager is also a pass. So a pass manager
+// runs when it is it's turn to run in its parent pass-manager pass pipeline.
+//
+
+#ifndef LLVM_SANDBOXIR_PASSMANAGER_H
+#define LLVM_SANDBOXIR_PASSMANAGER_H
+
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/SandboxIR/Pass.h"
+#include "llvm/Support/Debug.h"
+
+namespace llvm::sandboxir {
+
+class Value;
+
+/// Base class.
+template <typename ParentPass, typename ContainedPass>
+class PassManager : public ParentPass {
+protected:
+  /// The list of passes that this pass manager will run.
+  SmallVector<ContainedPass *> Passes;
+
+  PassManager(StringRef Name) : ParentPass(Name) {}
+  PassManager(const PassManager &) = delete;
+  virtual ~PassManager() = default;
+  PassManager &operator=(const PassManager &) = delete;
+
+public:
+  /// Adds \p Pass to the pass pipeline.
+  void addPass(ContainedPass *Pass) {
+    // TODO: Check that Pass's class type works with this PassManager type.
+    Passes.push_back(Pass);
+  }
+#ifndef NDEBUG
+  void print(raw_ostream &OS) const override {
+    OS << this->getName();
+    OS << "(";
+    for (auto [Idx, Pass] : enumerate(Passes)) {
+      OS << Pass->getName();
+      if (Idx + 1 != Passes.size())
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vporpo wrote:

`interleaveComma` inserts a whitespace after the comma, so I just used `interleave()`

https://github.com/llvm/llvm-project/pull/107932