LLVM  14.0.0git
LowerAtomic.h
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1 //===- LowerAtomic.cpp - 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_SCALAR_LOWERATOMIC_H
15 #define LLVM_TRANSFORMS_SCALAR_LOWERATOMIC_H
16 
17 #include "llvm/IR/PassManager.h"
18 
19 namespace llvm {
20 
21 /// A pass that lowers atomic intrinsic into non-atomic intrinsics.
22 class LowerAtomicPass : public PassInfoMixin<LowerAtomicPass> {
23 public:
25  static bool isRequired() { return true; }
26 };
27 
28 class AtomicRMWInst;
29 /// Convert the given RMWI into primitive load and stores,
30 /// assuming that doing so is legal. Return true if the lowering
31 /// succeeds.
32 bool lowerAtomicRMWInst(AtomicRMWInst *RMWI);
33 }
34 
35 #endif // LLVM_TRANSFORMS_SCALAR_LOWERATOMIC_H
llvm::PreservedAnalyses
A set of analyses that are preserved following a run of a transformation pass.
Definition: PassManager.h:155
llvm
This file implements support for optimizing divisions by a constant.
Definition: AllocatorList.h:23
llvm::LowerAtomicPass
A pass that lowers atomic intrinsic into non-atomic intrinsics.
Definition: LowerAtomic.h:22
llvm::PassInfoMixin
A CRTP mix-in to automatically provide informational APIs needed for passes.
Definition: PassManager.h:374
llvm::Function
Definition: Function.h:62
F
#define F(x, y, z)
Definition: MD5.cpp:56
llvm::lowerAtomicRMWInst
bool lowerAtomicRMWInst(AtomicRMWInst *RMWI)
Convert the given RMWI into primitive load and stores, assuming that doing so is legal.
Definition: LowerAtomic.cpp:43
llvm::LowerAtomicPass::run
PreservedAnalyses run(Function &F, FunctionAnalysisManager &)
Definition: LowerAtomic.cpp:146
PassManager.h
llvm::AnalysisManager
A container for analyses that lazily runs them and caches their results.
Definition: InstructionSimplify.h:44
llvm::LowerAtomicPass::isRequired
static bool isRequired()
Definition: LowerAtomic.h:25