68 lines
2.9 KiB
C
68 lines
2.9 KiB
C
|
//===- Transform/Utils/CodeMoverUtils.h - CodeMover Utils -------*- C++ -*-===//
|
||
|
|
//
|
||
|
|
// 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
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// This family of functions determine movements are safe on basic blocks, and
|
||
|
|
// instructions contained within a function.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#ifndef LLVM_TRANSFORMS_UTILS_CODEMOVERUTILS_H
|
||
|
|
#define LLVM_TRANSFORMS_UTILS_CODEMOVERUTILS_H
|
||
|
|
|
||
|
|
namespace llvm {
|
||
|
|
|
||
|
|
class BasicBlock;
|
||
|
|
class DependenceInfo;
|
||
|
|
class DominatorTree;
|
||
|
|
class Instruction;
|
||
|
|
class PostDominatorTree;
|
||
|
|
|
||
|
|
/// Return true if \p I0 and \p I1 are control flow equivalent.
|
||
|
|
/// Two instructions are control flow equivalent if their basic blocks are
|
||
|
|
/// control flow equivalent.
|
||
|
|
bool isControlFlowEquivalent(const Instruction &I0, const Instruction &I1,
|
||
|
|
const DominatorTree &DT,
|
||
|
|
const PostDominatorTree &PDT);
|
||
|
|
|
||
|
|
/// Return true if \p BB0 and \p BB1 are control flow equivalent.
|
||
|
|
/// Two basic blocks are control flow equivalent if when one executes, the other
|
||
|
|
/// is guaranteed to execute.
|
||
|
|
bool isControlFlowEquivalent(const BasicBlock &BB0, const BasicBlock &BB1,
|
||
|
|
const DominatorTree &DT,
|
||
|
|
const PostDominatorTree &PDT);
|
||
|
|
|
||
|
|
/// Return true if \p I can be safely moved before \p InsertPoint.
|
||
|
|
bool isSafeToMoveBefore(Instruction &I, Instruction &InsertPoint,
|
||
|
|
DominatorTree &DT,
|
||
|
|
const PostDominatorTree *PDT = nullptr,
|
||
|
|
DependenceInfo *DI = nullptr);
|
||
|
|
|
||
|
|
/// Return true if all instructions (except the terminator) in \p BB can be
|
||
|
|
/// safely moved before \p InsertPoint.
|
||
|
|
bool isSafeToMoveBefore(BasicBlock &BB, Instruction &InsertPoint,
|
||
|
|
DominatorTree &DT,
|
||
|
|
const PostDominatorTree *PDT = nullptr,
|
||
|
|
DependenceInfo *DI = nullptr);
|
||
|
|
|
||
|
|
/// Move instructions, in an order-preserving manner, from \p FromBB to the
|
||
|
|
/// beginning of \p ToBB when proven safe.
|
||
|
|
void moveInstructionsToTheBeginning(BasicBlock &FromBB, BasicBlock &ToBB,
|
||
|
|
DominatorTree &DT,
|
||
|
|
const PostDominatorTree &PDT,
|
||
|
|
DependenceInfo &DI);
|
||
|
|
|
||
|
|
/// Move instructions, in an order-preserving manner, from \p FromBB to the end
|
||
|
|
/// of \p ToBB when proven safe.
|
||
|
|
void moveInstructionsToTheEnd(BasicBlock &FromBB, BasicBlock &ToBB,
|
||
|
|
DominatorTree &DT, const PostDominatorTree &PDT,
|
||
|
|
DependenceInfo &DI);
|
||
|
|
|
||
|
|
} // end namespace llvm
|
||
|
|
|
||
|
|
#endif // LLVM_TRANSFORMS_UTILS_CODEMOVERUTILS_H
|