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35 lines
1.3 KiB
C++
35 lines
1.3 KiB
C++
//===- ConstantMerge.h - Merge duplicate global constants -------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the interface to a pass that merges duplicate global
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// constants together into a single constant that is shared. This is useful
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// because some passes (ie TraceValues) insert a lot of string constants into
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// the program, regardless of whether or not an existing string is available.
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//
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// Algorithm: ConstantMerge is designed to build up a map of available constants
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// and eliminate duplicates when it is initialized.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_IPO_CONSTANTMERGE_H
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#define LLVM_TRANSFORMS_IPO_CONSTANTMERGE_H
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#include "llvm/IR/Module.h"
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#include "llvm/IR/PassManager.h"
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namespace llvm {
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/// A pass that merges duplicate global constants into a single constant.
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class ConstantMergePass : public PassInfoMixin<ConstantMergePass> {
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public:
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PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
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};
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}
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#endif // LLVM_TRANSFORMS_IPO_CONSTANTMERGE_H
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