6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
//===- llvm/CodeGen/GlobalMerge.h -------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_GLOBALMERGE_H
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#define LLVM_CODEGEN_GLOBALMERGE_H
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#include "llvm/IR/PassManager.h"
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namespace llvm {
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class TargetMachine;
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struct GlobalMergeOptions {
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// FIXME: Infer the maximum possible offset depending on the actual users
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// (these max offsets are different for the users inside Thumb or ARM
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// functions), see the code that passes in the offset in the ARM backend
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// for more information.
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unsigned MaxOffset = 0;
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// The minimum size in bytes of each global that should considered in merging.
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unsigned MinSize = 0;
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bool GroupByUse = true;
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bool IgnoreSingleUse = true;
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bool MergeConst = false;
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/// Whether we should merge global variables that have external linkage.
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bool MergeExternal = true;
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/// Whether we should merge constant global variables.
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bool MergeConstantGlobals = false;
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/// Whether we should try to optimize for size only.
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/// Currently, this applies a dead simple heuristic: only consider globals
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/// used in minsize functions for merging.
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/// FIXME: This could learn about optsize, and be used in the cost model.
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bool SizeOnly = false;
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};
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// FIXME: This pass must run before AsmPrinterPass::doInitialization!
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class GlobalMergePass : public PassInfoMixin<GlobalMergePass> {
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const TargetMachine *TM;
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GlobalMergeOptions Options;
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public:
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GlobalMergePass(const TargetMachine *TM, GlobalMergeOptions Options)
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: TM(TM), Options(Options) {}
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PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
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};
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} // namespace llvm
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#endif // LLVM_CODEGEN_GLOBALMERGE_H
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