LLVM 20.0.0git
ConstantMerge.h
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1//===- ConstantMerge.h - Merge duplicate global constants -------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines the interface to a pass that merges duplicate global
10// constants together into a single constant that is shared. This is useful
11// because some passes (ie TraceValues) insert a lot of string constants into
12// the program, regardless of whether or not an existing string is available.
13//
14// Algorithm: ConstantMerge is designed to build up a map of available constants
15// and eliminate duplicates when it is initialized.
16//
17//===----------------------------------------------------------------------===//
18
19#ifndef LLVM_TRANSFORMS_IPO_CONSTANTMERGE_H
20#define LLVM_TRANSFORMS_IPO_CONSTANTMERGE_H
21
22#include "llvm/IR/PassManager.h"
23
24namespace llvm {
25
26class Module;
27
28/// A pass that merges duplicate global constants into a single constant.
29class ConstantMergePass : public PassInfoMixin<ConstantMergePass> {
30public:
32};
33
34} // end namespace llvm
35
36#endif // LLVM_TRANSFORMS_IPO_CONSTANTMERGE_H
Machine Check Debug Module
This header defines various interfaces for pass management in LLVM.
A container for analyses that lazily runs them and caches their results.
Definition: PassManager.h:253
A pass that merges duplicate global constants into a single constant.
Definition: ConstantMerge.h:29
PreservedAnalyses run(Module &M, ModuleAnalysisManager &)
A Module instance is used to store all the information related to an LLVM module.
Definition: Module.h:65
A set of analyses that are preserved following a run of a transformation pass.
Definition: Analysis.h:111
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
A CRTP mix-in to automatically provide informational APIs needed for passes.
Definition: PassManager.h:69