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/*========================== begin_copyright_notice ============================
Copyright (C) 2017-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#pragma once
#include "MetaDataTraits.h"
#include "common/LLVMWarningsPush.hpp"
#include <llvm/IR/Value.h>
#include <llvm/IR/Metadata.h>
#include "common/LLVMWarningsPop.hpp"
#include "Probe/Assertion.h"
namespace IGC
{
// Represents the meta data value stored using the positional schema
// The root node is actually storing the value
template<class T, class Traits = MDValueTraits<T> >
class MetaDataValue
{
public:
typedef typename Traits::value_type value_type;
MetaDataValue(llvm::Metadata* pNode) :
m_pNode(pNode),
m_value(Traits::load(pNode)),
m_isDirty(false),
m_hasGeneratedValued(false)
{
}
MetaDataValue() :
m_pNode(NULL),
m_value(),
m_isDirty(false),
m_hasGeneratedValued(false)
{
}
MetaDataValue(const value_type& val) :
m_pNode(NULL),
m_value(val),
m_isDirty(true),
m_hasGeneratedValued(false)
{
}
operator value_type() const
{
return m_value;
}
const value_type& get() const
{
return m_value;
}
llvm::MDNode* getMDNode() const
{
return static_cast<llvm::MDNode*>(m_pNode);
}
void set(const value_type& val)
{
m_value = val;
m_isDirty = true;
}
bool dirty() const
{
return m_isDirty;
}
bool hasValue() const
{
return m_pNode != NULL || dirty() || m_hasGeneratedValued;
}
void discardChanges()
{
m_isDirty = false;
}
void save(llvm::LLVMContext& context, llvm::Metadata* pNode) const
{
IGC_UNUSED(context);
if (m_pNode == pNode && !dirty())
{
// we are saving to our own node but nothing was changed
return;
}
if (!hasValue())
{
return;
}
#if 0
pNode->replaceAllUsesWith(generateNode(context));
#else
IGC_ASSERT(0);
#endif
}
llvm::Metadata* generateNode(llvm::LLVMContext& context) const
{
if (!hasValue())
{
return NULL;
}
m_hasGeneratedValued = true;
return Traits::generateValue(context, m_value);
}
private:
llvm::Metadata* m_pNode;
value_type m_value;
bool m_isDirty;
mutable bool m_hasGeneratedValued;
};
///
// Represents the meta data value stored using the 'named' schema
// The root node should have two operands nodes:
// - the first one is MDString storing the name
// - the second one is actual value
template<class T, class Traits = MDValueTraits<T> >
class NamedMetaDataValue
{
public:
typedef typename Traits::value_type value_type;
NamedMetaDataValue() :
m_pNode(NULL),
m_id("")
{
}
NamedMetaDataValue(llvm::Metadata* pNode) :
m_pNode(pNode),
m_id(getIdNode(pNode)),
m_value(getValueNode(pNode))
{
}
NamedMetaDataValue(const char* name) :
m_pNode(NULL),
m_id(name)
{
}
NamedMetaDataValue(std::string name) :
m_pNode(NULL),
m_id(name.c_str())
{
}
NamedMetaDataValue(const char* name, const value_type& val) :
m_pNode(NULL),
m_id(name),
m_value(val)
{
}
operator value_type()
{
return (value_type)m_value;
}
value_type get() const
{
return m_value.get();
}
void set(const value_type& val)
{
m_value.set(val);
}
bool dirty() const
{
return m_value.dirty();
}
bool hasValue() const
{
return m_value.hasValue();
}
void discardChanges()
{
m_value.discardChanges();
}
void save(llvm::LLVMContext& context, llvm::Metadata* pNode) const
{
if (m_pNode == pNode && !dirty())
{
return;
}
if (!hasValue())
{
return;
}
llvm::MDNode* pMDNode = llvm::dyn_cast<llvm::MDNode>(pNode);
IGC_ASSERT_MESSAGE(pMDNode, "Named value parent node is not of MDNode type");
if (pMDNode->getNumOperands() != 2)
{
#if 0
pMDNode->replaceAllUsesWith(generateNode(context));
#else
IGC_ASSERT(0);
#endif
return;
}
m_id.save(context, pMDNode->getOperand(0));
m_value.save(context, pMDNode->getOperand(1));
}
llvm::Metadata* generateNode(llvm::LLVMContext& context) const
{
llvm::SmallVector< llvm::Metadata*, 2> args;
args.push_back(m_id.generateNode(context));
args.push_back(m_value.generateNode(context));
return llvm::MDNode::get(context, args);
}
NamedMetaDataValue& operator=(llvm::Value* pNode)
{
m_pNode = (llvm::Metadata*)pNode;
m_id = getIdNode(pNode);
m_value = getValueNode(pNode);
return *this;
}
NamedMetaDataValue& operator=(const char* name)
{
m_pNode = NULL;
m_id = std::string(name);
return *this;
}
NamedMetaDataValue& operator=(std::string name)
{
m_pNode = NULL;
m_id = name;
return *this;
}
private:
llvm::Metadata* getIdNode(const llvm::Metadata* pNode)
{
if (NULL == pNode)
{
return NULL; //this is allowed for optional nodes
}
const llvm::MDNode* const pMDNode = llvm::dyn_cast<const llvm::MDNode>(pNode);
IGC_ASSERT_MESSAGE(nullptr != pMDNode, "Named value parent node is not of MDNode type");
IGC_ASSERT_MESSAGE(1 <= pMDNode->getNumOperands(), "Named value doesn't have a name node");
llvm::MDString* const pIdNode = llvm::dyn_cast<llvm::MDString>(pMDNode->getOperand(0));
IGC_ASSERT_MESSAGE(nullptr != pIdNode, "Named list id node is not a string");
return pIdNode;
}
llvm::Metadata* getValueNode(const llvm::Metadata* pNode)
{
if (NULL == pNode)
{
return NULL; //this is allowed for optional nodes
}
const llvm::MDNode* const pMDNode = llvm::dyn_cast<const llvm::MDNode>(pNode);
IGC_ASSERT_MESSAGE(nullptr != pMDNode, "Named value parent node is not of MDNode type");
IGC_ASSERT_MESSAGE(2 <= pMDNode->getNumOperands(), "Named value doesn't have a value node");
return pMDNode->getOperand(1).get();
}
private:
llvm::Metadata* m_pNode; // root node initialized during the load
MetaDataValue<std::string> m_id;
MetaDataValue<T, Traits> m_value;
};
} //namespace
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