llvm/llvm/lib/Target/AVR/AVRShiftExpand.cpp

//===- AVRShift.cpp - Shift Expansion Pass --------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
/// \file
/// Expand non-8-bit and non-16-bit shift instructions (shl, lshr, ashr) to
/// inline loops, just like avr-gcc. This must be done in IR because otherwise
/// the type legalizer will turn 32-bit shifts into (non-existing) library calls
/// such as __ashlsi3.
//
//===----------------------------------------------------------------------===//

#include "AVR.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/InstIterator.h"

usingnamespacellvm;

namespace {

class AVRShiftExpand : public FunctionPass { … };

} // end of anonymous namespace

char AVRShiftExpand::ID = …;

INITIALIZE_PASS(…)

Pass *llvm::createAVRShiftExpandPass() { … }

bool AVRShiftExpand::runOnFunction(Function &F) { … }

void AVRShiftExpand::expand(BinaryOperator *BI) { … }