mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 18:54:02 +01:00
b944ac9e0a
1. Removed #include "...AliasAnalysis.h" in other headers and modules. 2. Cleaned up includes in AliasAnalysis.h. Reviewed By: RKSimon Differential Revision: https://reviews.llvm.org/D92489
46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
//===- ObjCARCAnalysisUtils.cpp -------------------------------------------===//
|
|
//
|
|
// 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 file implements common infrastructure for libLLVMObjCARCOpts.a, which
|
|
// implements several scalar transformations over the LLVM intermediate
|
|
// representation, including the C bindings for that library.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/ObjCARCAnalysisUtils.h"
|
|
#include "llvm/Analysis/AliasAnalysis.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::objcarc;
|
|
|
|
/// A handy option to enable/disable all ARC Optimizations.
|
|
bool llvm::objcarc::EnableARCOpts;
|
|
static cl::opt<bool, true> EnableARCOptimizations(
|
|
"enable-objc-arc-opts", cl::desc("enable/disable all ARC Optimizations"),
|
|
cl::location(EnableARCOpts), cl::init(true), cl::Hidden);
|
|
|
|
bool llvm::objcarc::IsPotentialRetainableObjPtr(const Value *Op,
|
|
AAResults &AA) {
|
|
// First make the rudimentary check.
|
|
if (!IsPotentialRetainableObjPtr(Op))
|
|
return false;
|
|
|
|
// Objects in constant memory are not reference-counted.
|
|
if (AA.pointsToConstantMemory(Op))
|
|
return false;
|
|
|
|
// Pointers in constant memory are not pointing to reference-counted objects.
|
|
if (const LoadInst *LI = dyn_cast<LoadInst>(Op))
|
|
if (AA.pointsToConstantMemory(LI->getPointerOperand()))
|
|
return false;
|
|
|
|
// Otherwise assume the worst.
|
|
return true;
|
|
}
|