6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
//===- llvm/Support/DivisionByConstantInfo.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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///
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/// This file implements support for optimizing divisions by a constant
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_DIVISIONBYCONSTANTINFO_H
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#define LLVM_SUPPORT_DIVISIONBYCONSTANTINFO_H
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#include "llvm/ADT/APInt.h"
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namespace llvm {
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/// Magic data for optimising signed division by a constant.
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struct SignedDivisionByConstantInfo {
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static SignedDivisionByConstantInfo get(const APInt &D);
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APInt Magic; ///< magic number
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unsigned ShiftAmount; ///< shift amount
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};
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/// Magic data for optimising unsigned division by a constant.
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struct UnsignedDivisionByConstantInfo {
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static UnsignedDivisionByConstantInfo
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get(const APInt &D, unsigned LeadingZeros = 0,
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bool AllowEvenDivisorOptimization = true);
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APInt Magic; ///< magic number
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bool IsAdd; ///< add indicator
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unsigned PostShift; ///< post-shift amount
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unsigned PreShift; ///< pre-shift amount
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};
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} // namespace llvm
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#endif
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