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AlwaysInliner.cpp
(6.51 KB)
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ArgumentPromotion.cpp
(44.76 KB)
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Attributor.cpp
(81.04 KB)
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AttributorAttributes.cpp
(269.7 KB)
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BarrierNoopPass.cpp
(1.67 KB)
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BlockExtractor.cpp
(8.17 KB)
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CalledValuePropagation.cpp
(17.71 KB)
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ConstantMerge.cpp
(9.59 KB)
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CrossDSOCFI.cpp
(5.98 KB)
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DeadArgumentElimination.cpp
(42.84 KB)
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ElimAvailExtern.cpp
(3.14 KB)
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ExtractGV.cpp
(5.2 KB)
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ForceFunctionAttrs.cpp
(4.79 KB)
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FunctionAttrs.cpp
(55.56 KB)
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FunctionImport.cpp
(55.28 KB)
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GlobalDCE.cpp
(15.55 KB)
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GlobalOpt.cpp
(119.78 KB)
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GlobalSplit.cpp
(6.92 KB)
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HotColdSplitting.cpp
(26.27 KB)
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IPConstantPropagation.cpp
(10.68 KB)
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IPO.cpp
(4.94 KB)
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InferFunctionAttrs.cpp
(2.89 KB)
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InlineSimple.cpp
(4.21 KB)
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Inliner.cpp
(44.77 KB)
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Internalize.cpp
(9.52 KB)
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LoopExtractor.cpp
(7.14 KB)
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LowerTypeTests.cpp
(83.98 KB)
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MergeFunctions.cpp
(34.12 KB)
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OpenMPOpt.cpp
(52.75 KB)
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PartialInlining.cpp
(55.67 KB)
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PassManagerBuilder.cpp
(49.21 KB)
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PruneEH.cpp
(9.54 KB)
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SCCP.cpp
(3.22 KB)
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SampleProfile.cpp
(77.15 KB)
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StripDeadPrototypes.cpp
(2.73 KB)
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StripSymbols.cpp
(11.7 KB)
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SyntheticCountsPropagation.cpp
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ThinLTOBitcodeWriter.cpp
(20.16 KB)
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WholeProgramDevirt.cpp
(85.02 KB)
Editing: StripDeadPrototypes.cpp
//===-- StripDeadPrototypes.cpp - Remove unused function declarations ----===// // // 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 // //===----------------------------------------------------------------------===// // // This pass loops over all of the functions in the input module, looking for // dead declarations and removes them. Dead declarations are declarations of // functions for which no implementation is available (i.e., declarations for // unused library functions). // //===----------------------------------------------------------------------===// #include "llvm/Transforms/IPO/StripDeadPrototypes.h" #include "llvm/ADT/Statistic.h" #include "llvm/IR/Module.h" #include "llvm/InitializePasses.h" #include "llvm/Pass.h" #include "llvm/Transforms/IPO.h" using namespace llvm; #define DEBUG_TYPE "strip-dead-prototypes" STATISTIC(NumDeadPrototypes, "Number of dead prototypes removed"); static bool stripDeadPrototypes(Module &M) { bool MadeChange = false; // Erase dead function prototypes. for (Module::iterator I = M.begin(), E = M.end(); I != E; ) { Function *F = &*I++; // Function must be a prototype and unused. if (F->isDeclaration() && F->use_empty()) { F->eraseFromParent(); ++NumDeadPrototypes; MadeChange = true; } } // Erase dead global var prototypes. for (Module::global_iterator I = M.global_begin(), E = M.global_end(); I != E; ) { GlobalVariable *GV = &*I++; // Global must be a prototype and unused. if (GV->isDeclaration() && GV->use_empty()) GV->eraseFromParent(); } // Return an indication of whether we changed anything or not. return MadeChange; } PreservedAnalyses StripDeadPrototypesPass::run(Module &M, ModuleAnalysisManager &) { if (stripDeadPrototypes(M)) return PreservedAnalyses::none(); return PreservedAnalyses::all(); } namespace { class StripDeadPrototypesLegacyPass : public ModulePass { public: static char ID; // Pass identification, replacement for typeid StripDeadPrototypesLegacyPass() : ModulePass(ID) { initializeStripDeadPrototypesLegacyPassPass( *PassRegistry::getPassRegistry()); } bool runOnModule(Module &M) override { if (skipModule(M)) return false; return stripDeadPrototypes(M); } }; } // end anonymous namespace char StripDeadPrototypesLegacyPass::ID = 0; INITIALIZE_PASS(StripDeadPrototypesLegacyPass, "strip-dead-prototypes", "Strip Unused Function Prototypes", false, false) ModulePass *llvm::createStripDeadPrototypesPass() { return new StripDeadPrototypesLegacyPass(); }
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