vendor/llvm-project/llvmorg-17-init-19304-gd0b54bb50e51

1 files changed, 52 insertions, 0 deletions

diff --git a/llvm/lib/Transforms/IPO/EmbedBitcodePass.cpp b/llvm/lib/Transforms/IPO/EmbedBitcodePass.cpp
new file mode 100644
index 000000000000..fa56a5b564ae
--- /dev/null
+++ b/llvm/lib/Transforms/IPO/EmbedBitcodePass.cpp
@@ -0,0 +1,52 @@
+//===- EmbedBitcodePass.cpp - Pass that embeds the bitcode into a global---===//
+//
+// 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/Transforms/IPO/EmbedBitcodePass.h"
+#include "llvm/Bitcode/BitcodeWriter.h"
+#include "llvm/Bitcode/BitcodeWriterPass.h"
+#include "llvm/IR/PassManager.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MemoryBufferRef.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/TargetParser/Triple.h"
+#include "llvm/Transforms/IPO/ThinLTOBitcodeWriter.h"
+#include "llvm/Transforms/Utils/Cloning.h"
+#include "llvm/Transforms/Utils/ModuleUtils.h"
+
+#include <memory>
+#include <string>
+
+using namespace llvm;
+
+PreservedAnalyses EmbedBitcodePass::run(Module &M, ModuleAnalysisManager &AM) {
+  if (M.getGlobalVariable("llvm.embedded.module", /*AllowInternal=*/true))
+    report_fatal_error("Can only embed the module once",
+                       /*gen_crash_diag=*/false);
+
+  Triple T(M.getTargetTriple());
+  if (T.getObjectFormat() != Triple::ELF)
+    report_fatal_error(
+        "EmbedBitcode pass currently only supports ELF object format",
+        /*gen_crash_diag=*/false);
+
+  std::unique_ptr<Module> NewModule = CloneModule(M);
+  MPM.run(*NewModule, AM);
+
+  std::string Data;
+  raw_string_ostream OS(Data);
+  if (IsThinLTO)
+    ThinLTOBitcodeWriterPass(OS, /*ThinLinkOS=*/nullptr).run(*NewModule, AM);
+  else
+    BitcodeWriterPass(OS, /*ShouldPreserveUseListOrder=*/false, EmitLTOSummary)
+        .run(*NewModule, AM);
+
+  embedBufferInModule(M, MemoryBufferRef(Data, "ModuleData"), ".llvm.lto");
+
+  return PreservedAnalyses::all();
+}