10a9e7442c
This patch plumbs the command line --experimental-debuginfo-iterators flag in to the pass managers, so that modules can be converted to the new format, passes run, then converted back to the old format. That allows developers to test-out the new debuginfo representation across some part of LLVM with no further work, and from the command line. It also installs flag-catchers at the various points that bitcode and textual IR can egress from a process, and temporarily convert the module to dbg.value format when doing so. No tests alas as it's designed to be transparent. Differential Revision: https://reviews.llvm.org/D154372
105 lines
3.8 KiB
C++
105 lines
3.8 KiB
C++
//===- BitcodeWriterPass.cpp - Bitcode writing pass -----------------------===//
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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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//
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// BitcodeWriterPass implementation.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Bitcode/BitcodeWriterPass.h"
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#include "llvm/Analysis/ModuleSummaryAnalysis.h"
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#include "llvm/Bitcode/BitcodeWriter.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/InitializePasses.h"
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#include "llvm/Pass.h"
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using namespace llvm;
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PreservedAnalyses BitcodeWriterPass::run(Module &M, ModuleAnalysisManager &AM) {
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// RemoveDIs: there's no bitcode representation of the DPValue debug-info,
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// convert to dbg.values before writing out.
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bool IsNewDbgInfoFormat = M.IsNewDbgInfoFormat;
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if (IsNewDbgInfoFormat)
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M.convertFromNewDbgValues();
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const ModuleSummaryIndex *Index =
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EmitSummaryIndex ? &(AM.getResult<ModuleSummaryIndexAnalysis>(M))
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: nullptr;
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WriteBitcodeToFile(M, OS, ShouldPreserveUseListOrder, Index, EmitModuleHash);
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if (IsNewDbgInfoFormat)
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M.convertToNewDbgValues();
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return PreservedAnalyses::all();
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}
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namespace {
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class WriteBitcodePass : public ModulePass {
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raw_ostream &OS; // raw_ostream to print on
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bool ShouldPreserveUseListOrder;
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bool EmitSummaryIndex;
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bool EmitModuleHash;
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public:
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static char ID; // Pass identification, replacement for typeid
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WriteBitcodePass() : ModulePass(ID), OS(dbgs()) {
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initializeWriteBitcodePassPass(*PassRegistry::getPassRegistry());
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}
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explicit WriteBitcodePass(raw_ostream &o, bool ShouldPreserveUseListOrder,
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bool EmitSummaryIndex, bool EmitModuleHash)
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: ModulePass(ID), OS(o),
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ShouldPreserveUseListOrder(ShouldPreserveUseListOrder),
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EmitSummaryIndex(EmitSummaryIndex), EmitModuleHash(EmitModuleHash) {
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initializeWriteBitcodePassPass(*PassRegistry::getPassRegistry());
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}
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StringRef getPassName() const override { return "Bitcode Writer"; }
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bool runOnModule(Module &M) override {
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const ModuleSummaryIndex *Index =
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EmitSummaryIndex
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? &(getAnalysis<ModuleSummaryIndexWrapperPass>().getIndex())
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: nullptr;
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// RemoveDIs: there's no bitcode representation of the DPValue debug-info,
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// convert to dbg.values before writing out.
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bool IsNewDbgInfoFormat = M.IsNewDbgInfoFormat;
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if (IsNewDbgInfoFormat)
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M.convertFromNewDbgValues();
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WriteBitcodeToFile(M, OS, ShouldPreserveUseListOrder, Index,
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EmitModuleHash);
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if (IsNewDbgInfoFormat)
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M.convertToNewDbgValues();
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return false;
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}
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.setPreservesAll();
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if (EmitSummaryIndex)
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AU.addRequired<ModuleSummaryIndexWrapperPass>();
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}
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};
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}
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char WriteBitcodePass::ID = 0;
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INITIALIZE_PASS_BEGIN(WriteBitcodePass, "write-bitcode", "Write Bitcode", false,
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true)
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INITIALIZE_PASS_DEPENDENCY(ModuleSummaryIndexWrapperPass)
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INITIALIZE_PASS_END(WriteBitcodePass, "write-bitcode", "Write Bitcode", false,
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true)
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ModulePass *llvm::createBitcodeWriterPass(raw_ostream &Str,
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bool ShouldPreserveUseListOrder,
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bool EmitSummaryIndex, bool EmitModuleHash) {
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return new WriteBitcodePass(Str, ShouldPreserveUseListOrder,
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EmitSummaryIndex, EmitModuleHash);
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}
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bool llvm::isBitcodeWriterPass(Pass *P) {
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return P->getPassID() == (llvm::AnalysisID)&WriteBitcodePass::ID;
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}
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