LLVM  15.0.0git
LowerAtomic.h
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1 //===- LowerAtomic.h - Lower atomic intrinsics ------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 /// \file
9 // This pass lowers atomic intrinsics to non-atomic form for use in a known
10 // non-preemptible environment.
11 ///
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_TRANSFORMS_UTILS_LOWERATOMIC_H
15 #define LLVM_TRANSFORMS_UTILS_LOWERATOMIC_H
16 
17 #include "llvm/IR/Instructions.h"
18 
19 namespace llvm {
20 
21 class IRBuilderBase;
22 
23 /// Convert the given Cmpxchg into primitive load and compare.
24 bool lowerAtomicCmpXchgInst(AtomicCmpXchgInst *CXI);
25 
26 /// Convert the given RMWI into primitive load and stores,
27 /// assuming that doing so is legal. Return true if the lowering
28 /// succeeds.
29 bool lowerAtomicRMWInst(AtomicRMWInst *RMWI);
30 
31 /// Emit IR to implement the given atomicrmw operation on values in registers,
32 /// returning the new value.
34  Value *Loaded, Value *Inc);
35 }
36 
37 #endif // LLVM_TRANSFORMS_UTILS_LOWERATOMIC_H
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:17
llvm::AtomicRMWInst::BinOp
BinOp
This enumeration lists the possible modifications atomicrmw can make.
Definition: Instructions.h:727
llvm::lowerAtomicRMWInst
bool lowerAtomicRMWInst(AtomicRMWInst *RMWI)
Convert the given RMWI into primitive load and stores, assuming that doing so is legal.
Definition: LowerAtomic.cpp:86
llvm::lowerAtomicCmpXchgInst
bool lowerAtomicCmpXchgInst(AtomicCmpXchgInst *CXI)
Convert the given Cmpxchg into primitive load and compare.
Definition: LowerAtomic.cpp:23
llvm::buildAtomicRMWValue
Value * buildAtomicRMWValue(AtomicRMWInst::BinOp Op, IRBuilderBase &Builder, Value *Loaded, Value *Inc)
Emit IR to implement the given atomicrmw operation on values in registers, returning the new value.
Definition: LowerAtomic.cpp:42
Builder
assume Assume Builder
Definition: AssumeBundleBuilder.cpp:651
llvm::AMDGPU::SendMsg::Op
Op
Definition: SIDefines.h:348
llvm::TargetStackID::Value
Value
Definition: TargetFrameLowering.h:27
Instructions.h