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/*========================== begin_copyright_notice ============================
Copyright (C) 2020-2023 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#ifndef IGCLLVM_IR_VALUE_H
#define IGCLLVM_IR_VALUE_H
#include "Probe/Assertion.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Config/llvm-config.h"
#include "llvmWrapper/IR/User.h"
namespace IGCLLVM {
#if LLVM_VERSION_MAJOR >= 10
#define stripPointerCastsNoFollowAliases() stripPointerCasts()
#endif
inline void replaceUsesWithIf(llvm::Value *V, llvm::Value *New, llvm::function_ref<bool(llvm::Use &U)> ShouldReplace) {
// similar to llvm::Value::replaceUsesWithIf implementation
IGC_ASSERT_MESSAGE(V, "Cannot replace uses of nullptr");
IGC_ASSERT_MESSAGE(New, "Value::replaceUsesWithIf(<null>) is invalid!");
IGC_ASSERT_MESSAGE(New->getType() == V->getType(), "replaceUses of value with new value of different type!");
#if LLVM_VERSION_MAJOR < 10
for (auto UI = V->use_begin(), E = V->use_end(); UI != E;) {
llvm::Use &U = *UI;
++UI;
if (!ShouldReplace(U))
continue;
U.set(New);
}
#else
V->replaceUsesWithIf(New, ShouldReplace);
#endif
}
inline uint64_t getPointerDereferenceableBytes(const llvm::Value *Ptr, const llvm::DataLayout &DL, bool &CanBeNull,
bool &CanBeFreed) {
#if LLVM_VERSION_MAJOR >= 13
// LLVM 13 introduced CanBeFreed argument.
//
// > IF CanBeFreed is true, the pointer is known to be dereferenceable at
// > point of definition only. Caller must prove that allocation is not
// > deallocated between point of definition and use.
//
// Differential Revision: https://reviews.llvm.org/D98908
return Ptr->getPointerDereferenceableBytes(DL, CanBeNull, CanBeFreed);
#else
return Ptr->getPointerDereferenceableBytes(DL, CanBeNull);
#endif
}
inline llvm::User *getUniqueUndroppableUser(llvm::Value *V) {
#if LLVM_VERSION_MAJOR >= 14
return V->getUniqueUndroppableUser();
#else // For earlier versions, simply copy LLVM 14's implementation
llvm::User *Result = nullptr;
for (auto *U : V->users()) {
if (IGCLLVM::isDroppable(U)) {
if (Result && Result != U)
return nullptr;
Result = U;
}
}
return Result;
#endif
}
} // namespace IGCLLVM
#endif
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