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//===- llvm/Transforms/Utils/IntegerDivision.h ------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains an implementation of 32bit integer division for targets
// that don't have native support. It's largely derived from compiler-rt's
// implementation of __udivsi3, but hand-tuned for targets that prefer less
// control flow.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TRANSFORMS_UTILS_INTEGERDIVISION_H
#define LLVM_TRANSFORMS_UTILS_INTEGERDIVISION_H
namespace llvm {
class BinaryOperator;
}
namespace llvm {
/// Generate code to calculate the remainder of two integers, replacing Rem
/// with the generated code. This currently generates code using the udiv
/// expansion, but future work includes generating more specialized code,
/// e.g. when more information about the operands are known. Currently only
/// implements 32bit scalar division (due to udiv's limitation), but future
/// work is removing this limitation.
///
/// @brief Replace Rem with generated code.
bool expandRemainder(BinaryOperator *Rem);
/// Generate code to divide two integers, replacing Div with the generated
/// code. This currently generates code similarly to compiler-rt's
/// implementations, but future work includes generating more specialized code
/// when more information about the operands are known. Currently only
/// implements 32bit scalar division, but future work is removing this
/// limitation.
///
/// @brief Replace Div with generated code.
bool expandDivision(BinaryOperator* Div);
} // End llvm namespace
#endif
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