[llvm] [llvm-objdump] Add support for HIP offload bundles (PR #114834)

[Joseph Huber via llvm-commits]

================
@@ -0,0 +1,481 @@
+//===- OffloadBundle.cpp - Utilities for handling offloading code  -*- 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/Object/OffloadBundle.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/BinaryFormat/Magic.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IRReader/IRReader.h"
+#include "llvm/MC/StringTableBuilder.h"
+#include "llvm/Object/Archive.h"
+#include "llvm/Object/Binary.h"
+#include "llvm/Object/COFF.h"
+#include "llvm/Object/ELFObjectFile.h"
+#include "llvm/Object/Error.h"
+#include "llvm/Object/IRObjectFile.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/Alignment.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/Timer.h"
+
+using namespace llvm;
+using namespace llvm::object;
+
+static llvm::TimerGroup
+    OffloadBundlerTimerGroup("Offload Bundler Timer Group",
+                             "Timer group for offload bundler");
+
+// Extract an Offload bundle (usually a Offload Bundle) from a fat_bin
+// section
+Error extractOffloadBundle(MemoryBufferRef Contents, uint64_t SectionOffset,
+                           StringRef FileName,
+                           SmallVectorImpl<OffloadBundleFatBin> &Bundles) {
+
+  uint64_t Offset = 0;
+  int64_t NextbundleStart = 0;
+
+  // There could be multiple offloading bundles stored at this section.
+  while (NextbundleStart >= 0) {
+
+    std::unique_ptr<MemoryBuffer> Buffer =
+        MemoryBuffer::getMemBuffer(Contents.getBuffer().drop_front(Offset), "",
+                                   /*RequiresNullTerminator*/ false);
----------------
jhuber6 wrote:

```suggestion
                                   /*RequiresNullTerminator=*/false);
```
nit. this is the format we accept and `clang-format` knows how to handle it.

https://github.com/llvm/llvm-project/pull/114834