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