| //===- LowerAtomic.h - Lower atomic intrinsics ------------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| /// \file |
| // This pass lowers atomic intrinsics to non-atomic form for use in a known |
| // non-preemptible environment. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_TRANSFORMS_SCALAR_LOWERATOMIC_H |
| #define LLVM_TRANSFORMS_SCALAR_LOWERATOMIC_H |
| |
| #include "llvm/IR/Instructions.h" |
| |
| namespace llvm { |
| |
| class IRBuilderBase; |
| |
| /// Convert the given Cmpxchg into primitive load and compare. |
| bool lowerAtomicCmpXchgInst(AtomicCmpXchgInst *CXI); |
| |
| /// Convert the given RMWI into primitive load and stores, |
| /// assuming that doing so is legal. Return true if the lowering |
| /// succeeds. |
| bool lowerAtomicRMWInst(AtomicRMWInst *RMWI); |
| |
| /// Emit IR to implement the given atomicrmw operation on values in registers, |
| /// returning the new value. |
| Value *buildAtomicRMWValue(AtomicRMWInst::BinOp Op, IRBuilderBase &Builder, |
| Value *Loaded, Value *Inc); |
| } |
| |
| #endif // LLVM_TRANSFORMS_SCALAR_LOWERATOMIC_H |