759fb0a224
This adds support for FatLTO to COFF targets in clang and lld. The changes are adapted from610fc5cbccand14e3bec8fcbut much smaller because it just needed the COFF-specific parts wired in, and I tried my best to adapt the pre-existing ELF tests for the COFF version. My main goal is to be able to use this for shipping pre-built https://github.com/XboxDev/nxdk container images someday, which uses the `i386-pc-win32` target.
46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
//===- EmbedBitcodePass.cpp - Pass that embeds the bitcode into a global---===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/IPO/EmbedBitcodePass.h"
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#include "llvm/Bitcode/BitcodeWriter.h"
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#include "llvm/Bitcode/BitcodeWriterPass.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/MemoryBufferRef.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/TargetParser/Triple.h"
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#include "llvm/Transforms/IPO/ThinLTOBitcodeWriter.h"
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#include "llvm/Transforms/Utils/ModuleUtils.h"
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#include <string>
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using namespace llvm;
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PreservedAnalyses EmbedBitcodePass::run(Module &M, ModuleAnalysisManager &AM) {
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if (M.getGlobalVariable("llvm.embedded.module", /*AllowInternal=*/true))
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reportFatalUsageError("Can only embed the module once");
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Triple T(M.getTargetTriple());
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if (T.getObjectFormat() != Triple::ELF && T.getObjectFormat() != Triple::COFF)
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reportFatalUsageError("EmbedBitcode pass currently only supports COFF and "
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"ELF object formats");
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std::string Data;
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raw_string_ostream OS(Data);
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if (IsThinLTO)
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ThinLTOBitcodeWriterPass(OS, /*ThinLinkOS=*/nullptr).run(M, AM);
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else
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BitcodeWriterPass(OS, /*ShouldPreserveUseListOrder=*/false, EmitLTOSummary)
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.run(M, AM);
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embedBufferInModule(M, MemoryBufferRef(Data, "ModuleData"), ".llvm.lto");
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return PreservedAnalyses::none();
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}
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