6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
73 lines
2.7 KiB
C++
73 lines
2.7 KiB
C++
//===- ObjCARCUtil.h - ObjC ARC Utility Functions ---------------*- 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 file defines ARC utility functions which are used by various parts of
|
|
/// the compiler.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_ANALYSIS_OBJCARCUTIL_H
|
|
#define LLVM_ANALYSIS_OBJCARCUTIL_H
|
|
|
|
#include "llvm/Analysis/ObjCARCInstKind.h"
|
|
#include "llvm/IR/Function.h"
|
|
#include "llvm/IR/InstrTypes.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
|
|
namespace llvm {
|
|
namespace objcarc {
|
|
|
|
inline const char *getRVMarkerModuleFlagStr() {
|
|
return "clang.arc.retainAutoreleasedReturnValueMarker";
|
|
}
|
|
|
|
inline bool hasAttachedCallOpBundle(const CallBase *CB) {
|
|
// Ignore the bundle if the return type is void. Global optimization passes
|
|
// can turn the called function's return type to void. That should happen only
|
|
// if the call doesn't return and the call to @llvm.objc.clang.arc.noop.use
|
|
// no longer consumes the function return or is deleted. In that case, it's
|
|
// not necessary to emit the marker instruction or calls to the ARC runtime
|
|
// functions.
|
|
return !CB->getFunctionType()->getReturnType()->isVoidTy() &&
|
|
CB->getOperandBundle(LLVMContext::OB_clang_arc_attachedcall)
|
|
.has_value();
|
|
}
|
|
|
|
/// This function returns operand bundle clang_arc_attachedcall's argument,
|
|
/// which is the address of the ARC runtime function.
|
|
inline std::optional<Function *> getAttachedARCFunction(const CallBase *CB) {
|
|
auto B = CB->getOperandBundle(LLVMContext::OB_clang_arc_attachedcall);
|
|
if (!B)
|
|
return std::nullopt;
|
|
|
|
return cast<Function>(B->Inputs[0]);
|
|
}
|
|
|
|
/// Check whether the function is retainRV/unsafeClaimRV.
|
|
inline bool isRetainOrClaimRV(ARCInstKind Kind) {
|
|
return Kind == ARCInstKind::RetainRV || Kind == ARCInstKind::UnsafeClaimRV;
|
|
}
|
|
|
|
/// This function returns the ARCInstKind of the function attached to operand
|
|
/// bundle clang_arc_attachedcall. It returns std::nullopt if the call doesn't
|
|
/// have the operand bundle or the operand is null. Otherwise it returns either
|
|
/// RetainRV or UnsafeClaimRV.
|
|
inline ARCInstKind getAttachedARCFunctionKind(const CallBase *CB) {
|
|
std::optional<Function *> Fn = getAttachedARCFunction(CB);
|
|
if (!Fn)
|
|
return ARCInstKind::None;
|
|
auto FnClass = GetFunctionClass(*Fn);
|
|
assert(isRetainOrClaimRV(FnClass) && "unexpected ARC runtime function");
|
|
return FnClass;
|
|
}
|
|
|
|
} // end namespace objcarc
|
|
} // end namespace llvm
|
|
|
|
#endif
|