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c6cf329502
In this patch, we create a new ModulePass that mimics the LinkInModules
API from CodeGenAction.cpp, and a new command line option to enable the
pass. As part of the implementation, we needed to refactor the
BackendConsumer class definition into a new separate header (instead of
embedded in CodeGenAction.cpp). With this new pass, we can now re-link
bitcodes supplied via the -mlink-built-in bitcodes as part of the
RunOptimizationPipeline.
With the re-linking pass, we now handle cases where new device library
functions are introduced as part of the optimization pipeline.
Previously, these newly introduced functions (for example a fused sincos
call) would result in a linking error due to a missing function
definition. This new pass can be initiated via:
-mllvm -relink-builtin-bitcode-postop
Also note we intentionally exclude bitcodes supplied via the
-mlink-bitcode-file option from the second linking step
30 lines
1017 B
C++
30 lines
1017 B
C++
//===-- LinkInModulesPass.cpp - Module Linking pass --------------- C++ -*-===//
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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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/// \file
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///
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/// LinkInModulesPass implementation.
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///
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//===----------------------------------------------------------------------===//
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#include "LinkInModulesPass.h"
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#include "BackendConsumer.h"
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using namespace llvm;
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LinkInModulesPass::LinkInModulesPass(clang::BackendConsumer *BC,
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bool ShouldLinkFiles)
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: BC(BC), ShouldLinkFiles(ShouldLinkFiles) {}
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PreservedAnalyses LinkInModulesPass::run(Module &M, ModuleAnalysisManager &AM) {
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if (BC && BC->LinkInModules(&M, ShouldLinkFiles))
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report_fatal_error("Bitcode module linking failed, compilation aborted!");
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return PreservedAnalyses::all();
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}
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