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📄 AMDGPUEmitPrintf.h(864 B)
📄 ASanStackFrameLayout.h(3.51 KB)
📄 AddDiscriminators.h(1.04 KB)
📄 AssumeBundleBuilder.h(2.29 KB)
📄 BasicBlockUtils.h(20.81 KB)
📄 BreakCriticalEdges.h(1.16 KB)
📄 BuildLibCalls.h(9.67 KB)
📄 BypassSlowDivision.h(2.55 KB)
📄 CallGraphUpdater.h(3.84 KB)
📄 CallPromotionUtils.h(3.41 KB)
📄 CanonicalizeAliases.h(998 B)
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📄 Cloning.h(12.34 KB)
📄 CodeExtractor.h(9.58 KB)
📄 CodeMoverUtils.h(2.85 KB)
📄 CtorUtils.h(1021 B)
📄 Debugify.h(3.36 KB)
📄 EntryExitInstrumenter.h(1.16 KB)
📄 EscapeEnumerator.h(1.56 KB)
📄 Evaluator.h(4.69 KB)
📄 FunctionComparator.h(17.12 KB)
📄 FunctionImportUtils.h(5.73 KB)
📄 GlobalStatus.h(2.97 KB)
📄 GuardUtils.h(1.92 KB)
📄 ImportedFunctionsInliningStatistics.h(4.35 KB)
📄 InjectTLIMappings.h(1.27 KB)
📄 IntegerDivision.h(2.88 KB)
📄 LCSSA.h(1.56 KB)
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📄 Local.h(24.77 KB)
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📄 ModuleUtils.h(5.04 KB)
📄 NameAnonGlobals.h(1.03 KB)
📄 PredicateInfo.h(7.76 KB)
📄 PromoteMemToReg.h(1.57 KB)
📄 SSAUpdater.h(6.12 KB)
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📄 SSAUpdaterImpl.h(15.75 KB)
📄 SanitizerStats.h(1.53 KB)
📄 ScalarEvolutionExpander.h(17.87 KB)
📄 SimplifyIndVar.h(2.12 KB)
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📄 UnrollLoop.h(6.05 KB)
📄 VNCoercion.h(4.99 KB)
📄 ValueMapper.h(11.67 KB)

Editing: GlobalStatus.h

//===- GlobalStatus.h - Compute status info for globals ---------*- 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_UTILS_GLOBALSTATUS_H
#define LLVM_TRANSFORMS_UTILS_GLOBALSTATUS_H

#include "llvm/Support/AtomicOrdering.h"

namespace llvm {

class Constant;
class Function;
class Value;

/// It is safe to destroy a constant iff it is only used by constants itself.
/// Note that constants cannot be cyclic, so this test is pretty easy to
/// implement recursively.
///
bool isSafeToDestroyConstant(const Constant *C);

/// As we analyze each global, keep track of some information about it.  If we
/// find out that the address of the global is taken, none of this info will be
/// accurate.
struct GlobalStatus {
  /// True if the global's address is used in a comparison.
  bool IsCompared = false;

/// True if the global is ever loaded.  If the global isn't ever loaded it
  /// can be deleted.
  bool IsLoaded = false;

/// Keep track of what stores to the global look like.
  enum StoredType {
    /// There is no store to this global.  It can thus be marked constant.
    NotStored,

/// This global is stored to, but the only thing stored is the constant it
    /// was initialized with. This is only tracked for scalar globals.
    InitializerStored,

/// This global is stored to, but only its initializer and one other value
    /// is ever stored to it.  If this global isStoredOnce, we track the value
    /// stored to it in StoredOnceValue below.  This is only tracked for scalar
    /// globals.
    StoredOnce,

/// This global is stored to by multiple values or something else that we
    /// cannot track.
    Stored
  } StoredType = NotStored;

/// If only one value (besides the initializer constant) is ever stored to
  /// this global, keep track of what value it is.
  Value *StoredOnceValue = nullptr;

/// These start out null/false.  When the first accessing function is noticed,
  /// it is recorded. When a second different accessing function is noticed,
  /// HasMultipleAccessingFunctions is set to true.
  const Function *AccessingFunction = nullptr;
  bool HasMultipleAccessingFunctions = false;

/// Set to true if this global has a user that is not an instruction (e.g. a
  /// constant expr or GV initializer).
  bool HasNonInstructionUser = false;

/// Set to the strongest atomic ordering requirement.
  AtomicOrdering Ordering = AtomicOrdering::NotAtomic;

GlobalStatus();

/// Look at all uses of the global and fill in the GlobalStatus structure.  If
  /// the global has its address taken, return true to indicate we can't do
  /// anything with it.
  static bool analyzeGlobal(const Value *V, GlobalStatus &GS);
};

} // end namespace llvm

#endif // LLVM_TRANSFORMS_UTILS_GLOBALSTATUS_H

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