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File indexing completed on 2026-05-10 08:44:40
0001 //===- ConstantMerge.h - Merge duplicate global constants -------*- C++ -*-===// 0002 // 0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 0004 // See https://llvm.org/LICENSE.txt for license information. 0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 0006 // 0007 //===----------------------------------------------------------------------===// 0008 // 0009 // This file defines the interface to a pass that merges duplicate global 0010 // constants together into a single constant that is shared. This is useful 0011 // because some passes (ie TraceValues) insert a lot of string constants into 0012 // the program, regardless of whether or not an existing string is available. 0013 // 0014 // Algorithm: ConstantMerge is designed to build up a map of available constants 0015 // and eliminate duplicates when it is initialized. 0016 // 0017 //===----------------------------------------------------------------------===// 0018 0019 #ifndef LLVM_TRANSFORMS_IPO_CONSTANTMERGE_H 0020 #define LLVM_TRANSFORMS_IPO_CONSTANTMERGE_H 0021 0022 #include "llvm/IR/PassManager.h" 0023 0024 namespace llvm { 0025 0026 class Module; 0027 0028 /// A pass that merges duplicate global constants into a single constant. 0029 class ConstantMergePass : public PassInfoMixin<ConstantMergePass> { 0030 public: 0031 PreservedAnalyses run(Module &M, ModuleAnalysisManager &); 0032 }; 0033 0034 } // end namespace llvm 0035 0036 #endif // LLVM_TRANSFORMS_IPO_CONSTANTMERGE_H
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