forked from OSchip/llvm-project
85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
//===- MachineDebugify.cpp - Attach synthetic debug info to everything ----===//
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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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/// \file This pass attaches synthetic debug info to everything. It can be used
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/// to create targeted tests for debug info preservation.
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///
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/// This isn't intended to have feature parity with Debugify.
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/IR/DIBuilder.h"
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#include "llvm/IR/DebugInfo.h"
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#include "llvm/InitializePasses.h"
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#include "llvm/Transforms/Utils/Debugify.h"
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#define DEBUG_TYPE "mir-debugify"
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using namespace llvm;
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namespace {
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bool applyDebugifyMetadataToMachineFunction(MachineModuleInfo &MMI,
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DIBuilder &DIB, Function &F) {
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MachineFunction &MF = MMI.getOrCreateMachineFunction(F);
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DISubprogram *SP = F.getSubprogram();
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assert(SP && "IR Debugify just created it?");
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LLVMContext &Ctx = F.getParent()->getContext();
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unsigned NextLine = SP->getLine();
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for (MachineBasicBlock &MBB : MF) {
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for (MachineInstr &MI : MBB) {
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// This will likely emit line numbers beyond the end of the imagined
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// source function and into subsequent ones. We don't do anything about
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// that as it doesn't really matter to the compiler where the line is in
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// the imaginary source code.
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MI.setDebugLoc(DILocation::get(Ctx, NextLine++, 1, SP));
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}
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}
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return true;
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}
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/// ModulePass for attaching synthetic debug info to everything, used with the
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/// legacy module pass manager.
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struct DebugifyMachineModule : public ModulePass {
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bool runOnModule(Module &M) override {
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MachineModuleInfo &MMI =
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getAnalysis<MachineModuleInfoWrapperPass>().getMMI();
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return applyDebugifyMetadata(
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M, M.functions(),
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"ModuleDebugify: ", [&](DIBuilder &DIB, Function &F) -> bool {
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return applyDebugifyMetadataToMachineFunction(MMI, DIB, F);
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});
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}
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DebugifyMachineModule() : ModulePass(ID) {}
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.addRequired<MachineModuleInfoWrapperPass>();
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AU.addPreserved<MachineModuleInfoWrapperPass>();
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}
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static char ID; // Pass identification.
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};
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char DebugifyMachineModule::ID = 0;
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} // end anonymous namespace
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INITIALIZE_PASS_BEGIN(DebugifyMachineModule, DEBUG_TYPE,
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"Machine Debugify Module", false, false)
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INITIALIZE_PASS_END(DebugifyMachineModule, DEBUG_TYPE,
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"Machine Debugify Module", false, false)
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ModulePass *createDebugifyMachineModulePass() {
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return new DebugifyMachineModule();
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}
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