Placeholder metadata for operands of distinct MDNodes. More...
#include "llvm/IR/Metadata.h"
Public Member Functions | |
| DistinctMDOperandPlaceholder (unsigned ID) | |
| DistinctMDOperandPlaceholder ()=delete | |
| DistinctMDOperandPlaceholder (DistinctMDOperandPlaceholder &&)=delete | |
| DistinctMDOperandPlaceholder (const DistinctMDOperandPlaceholder &)=delete | |
| ~DistinctMDOperandPlaceholder () | |
| unsigned | getID () const |
| void | replaceUseWith (Metadata *MD) |
| Replace the use of this with MD. | |
 Public Member Functions inherited from llvm::Metadata | |
| unsigned | getMetadataID () const |
| void | dump () const |
| User-friendly dump. | |
| void | dump (const Module *M) const |
| void | print (raw_ostream &OS, const Module *M=nullptr, bool IsForDebug=false) const |
| Print. | |
| void | print (raw_ostream &OS, ModuleSlotTracker &MST, const Module *M=nullptr, bool IsForDebug=false) const |
| void | printAsOperand (raw_ostream &OS, const Module *M=nullptr) const |
| Print as operand. | |
| void | printAsOperand (raw_ostream &OS, ModuleSlotTracker &MST, const Module *M=nullptr) const |
Friends | |
| class | MetadataTracking |
Additional Inherited Members | |
| Public Types inherited from llvm::Metadata | |
| enum | MetadataKind |
| Protected Types inherited from llvm::Metadata | |
| enum | StorageType { Uniqued , Distinct , Temporary } |
| Active type of storage. More... | |
| Protected Member Functions inherited from llvm::Metadata | |
| Metadata (unsigned ID, StorageType Storage) | |
| ~Metadata ()=default | |
| void | handleChangedOperand (void *, Metadata *) |
| Default handling of a changed operand, which asserts. | |
| Protected Attributes inherited from llvm::Metadata | |
| unsigned char | Storage: 7 |
| Storage flag for non-uniqued, otherwise unowned, metadata. | |
| unsigned char | SubclassData1: 1 |
| unsigned short | SubclassData16 = 0 |
| unsigned | SubclassData32 = 0 |
Detailed Description
Placeholder metadata for operands of distinct MDNodes.
This is a lightweight placeholder for an operand of a distinct node. It's purpose is to help track forward references when creating a distinct node. This allows distinct nodes involved in a cycle to be constructed before their operands without requiring a heavyweight temporary node with full-blown RAUW support.
Each placeholder supports only a single MDNode user. Clients should pass an ID, retrieved via getID(), to indicate the "real" operand that this should be replaced with.
While it would be possible to implement move operators, they would be fairly expensive. Leave them unimplemented to discourage their use (clients can use std::deque, std::list, BumpPtrAllocator, etc.).
Definition at line 1685 of file Metadata.h.
Constructor & Destructor Documentation
◆ DistinctMDOperandPlaceholder() [1/4]
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inlineexplicit |
Definition at line 1691 of file Metadata.h.
References llvm::Metadata::SubclassData32.
◆ DistinctMDOperandPlaceholder() [2/4]
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delete |
◆ DistinctMDOperandPlaceholder() [3/4]
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delete |
◆ DistinctMDOperandPlaceholder() [4/4]
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delete |
◆ ~DistinctMDOperandPlaceholder()
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inline |
Definition at line 1700 of file Metadata.h.
Member Function Documentation
◆ getID()
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inline |
Definition at line 1705 of file Metadata.h.
References llvm::Metadata::SubclassData32.
◆ replaceUseWith()
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inline |
Replace the use of this with MD.
Definition at line 1708 of file Metadata.h.
References assert(), llvm::MetadataTracking::track(), and llvm::MetadataTracking::untrack().
Friends And Related Function Documentation
◆ MetadataTracking
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friend |
Definition at line 1686 of file Metadata.h.
The documentation for this class was generated from the following file:
- include/llvm/IR/Metadata.h
