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Correct format: ``` //===--- Name of file - Description ----------------------------*- Lang -*-===// ``` Notes: * Comment line should be exactly 80 chars. * Padding: Pad with dashes after "Description" to reach 80 chars. * "Name of file", "Description" and "Lang" are all optional. * In case of missing "Lang": drop the "-*-" markers. * In case of missing space: drop one, two or three dashes before "Name of file".
53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
//===--- ConstantFolding.h - Utilities for SIL constant folding -*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines utility functions for constant folding.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_SIL_CONSTANTFOLDING_H
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#define SWIFT_SIL_CONSTANTFOLDING_H
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#include "swift/SIL/SILInstruction.h"
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namespace swift {
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/// Evaluates the constant result of a binary bit-operation.
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///
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/// The \p ID must be the ID of a binary bit-operation builtin.
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APInt constantFoldBitOperation(APInt lhs, APInt rhs, BuiltinValueKind ID);
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/// Evaluates the constant result of an integer comparison.
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///
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/// The \p ID must be the ID of an integer builtin operation.
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APInt constantFoldComparison(APInt lhs, APInt rhs, BuiltinValueKind ID);
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/// Evaluates the constant result of a binary operation with overflow.
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///
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/// The \p ID must be the ID of a binary operation with overflow.
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APInt constantFoldBinaryWithOverflow(APInt lhs, APInt rhs, bool &Overflow,
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llvm::Intrinsic::ID ID);
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/// Evaluates the constant result of a division operation.
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///
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/// The \p ID must be the ID of a division operation.
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APInt constantFoldDiv(APInt lhs, APInt rhs, bool &Overflow, BuiltinValueKind ID);
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/// Evaluates the constant result of an integer cast operation.
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///
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/// The \p ID must be the ID of a trunc/sext/zext builtin.
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APInt constantFoldCast(APInt val, const BuiltinInfo &BI);
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} // End namespace swift.
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#endif
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