LLVM  16.0.0git
Comdat.h
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1 //===- llvm/IR/Comdat.h - Comdat definitions --------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 /// @file
10 /// This file contains the declaration of the Comdat class, which represents a
11 /// single COMDAT in LLVM.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_IR_COMDAT_H
16 #define LLVM_IR_COMDAT_H
17 
18 #include "llvm-c/Types.h"
19 #include "llvm/ADT/SmallPtrSet.h"
21 
22 namespace llvm {
23 
24 class GlobalObject;
25 class raw_ostream;
26 class StringRef;
27 template <typename ValueTy> class StringMapEntry;
28 
29 // This is a Name X SelectionKind pair. The reason for having this be an
30 // independent object instead of just adding the name and the SelectionKind
31 // to a GlobalObject is that it is invalid to have two Comdats with the same
32 // name but different SelectionKind. This structure makes that unrepresentable.
33 class Comdat {
34 public:
36  Any, ///< The linker may choose any COMDAT.
37  ExactMatch, ///< The data referenced by the COMDAT must be the same.
38  Largest, ///< The linker will choose the largest COMDAT.
39  NoDeduplicate, ///< No deduplication is performed.
40  SameSize, ///< The data referenced by the COMDAT must be the same size.
41  };
42 
43  Comdat(const Comdat &) = delete;
44  Comdat(Comdat &&C);
45 
46  SelectionKind getSelectionKind() const { return SK; }
47  void setSelectionKind(SelectionKind Val) { SK = Val; }
48  StringRef getName() const;
49  void print(raw_ostream &OS, bool IsForDebug = false) const;
50  void dump() const;
51  const SmallPtrSetImpl<GlobalObject *> &getUsers() const { return Users; }
52 
53 private:
54  friend class Module;
55  friend class GlobalObject;
56 
57  Comdat();
58  void addUser(GlobalObject *GO);
59  void removeUser(GlobalObject *GO);
60 
61  // Points to the map in Module.
62  StringMapEntry<Comdat> *Name = nullptr;
63  SelectionKind SK = Any;
64  // Globals using this comdat.
66 };
67 
68 // Create wrappers for C Binding types (see CBindingWrapping.h).
70 
72  C.print(OS);
73  return OS;
74 }
75 
76 } // end namespace llvm
77 
78 #endif // LLVM_IR_COMDAT_H
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
llvm::StringMapEntry
StringMapEntry - This is used to represent one value that is inserted into a StringMap.
Definition: StringMapEntry.h:102
llvm::Comdat::getName
StringRef getName() const
Definition: Comdat.cpp:28
llvm::Comdat::ExactMatch
@ ExactMatch
The data referenced by the COMDAT must be the same.
Definition: Comdat.h:37
llvm::Comdat::NoDeduplicate
@ NoDeduplicate
No deduplication is performed.
Definition: Comdat.h:39
Types.h
llvm::SmallPtrSet
SmallPtrSet - This class implements a set which is optimized for holding SmallSize or less elements.
Definition: SmallPtrSet.h:450
CBindingWrapping.h
llvm::Comdat::Largest
@ Largest
The linker will choose the largest COMDAT.
Definition: Comdat.h:38
DEFINE_SIMPLE_CONVERSION_FUNCTIONS
#define DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ty, ref)
Definition: CBindingWrapping.h:19
llvm::Comdat::SelectionKind
SelectionKind
Definition: Comdat.h:35
C
(vector float) vec_cmpeq(*A, *B) C
Definition: README_ALTIVEC.txt:86
llvm::Comdat::getUsers
const SmallPtrSetImpl< GlobalObject * > & getUsers() const
Definition: Comdat.h:51
llvm::GlobalObject
Definition: GlobalObject.h:27
llvm::Comdat::Any
@ Any
The linker may choose any COMDAT.
Definition: Comdat.h:36
llvm::raw_ostream
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
llvm::Comdat::SameSize
@ SameSize
The data referenced by the COMDAT must be the same size.
Definition: Comdat.h:40
SmallPtrSet.h
llvm::Comdat
Definition: Comdat.h:33
const
aarch64 promote const
Definition: AArch64PromoteConstant.cpp:232
inline
into xmm2 addss xmm2 xmm1 xmm3 addss xmm3 movaps xmm0 unpcklps xmm0 ret seems silly when it could just be one addps Expand libm rounding functions inline
Definition: README-SSE.txt:72
llvm::Module
A Module instance is used to store all the information related to an LLVM module.
Definition: Module.h:65
llvm::StringRef
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
llvm::GraphProgram::Name
Name
Definition: GraphWriter.h:50
llvm::Comdat::dump
void dump() const
Definition: AsmWriter.cpp:4934
llvm::Comdat::setSelectionKind
void setSelectionKind(SelectionKind Val)
Definition: Comdat.h:47
Users
iv Induction Variable Users
Definition: IVUsers.cpp:48
llvm::SmallPtrSetImpl
A templated base class for SmallPtrSet which provides the typesafe interface that is common across al...
Definition: SmallPtrSet.h:344
llvm::Comdat::getSelectionKind
SelectionKind getSelectionKind() const
Definition: Comdat.h:46
llvm::Comdat::print
void print(raw_ostream &OS, bool IsForDebug=false) const
Definition: AsmWriter.cpp:4625
LLVMComdatRef
struct LLVMComdat * LLVMComdatRef
Definition: Types.h:153