Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- CodeGenTypes.h - Type translation for LLVM CodeGen -----*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file was developed by Chris Lattner and is distributed under |
| 6 | // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This is the code that handles AST -> LLVM type lowering. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #ifndef CODEGEN_CODEGENTYPES_H |
| 15 | #define CODEGEN_CODEGENTYPES_H |
| 16 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 17 | #include "llvm/ADT/DenseMap.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 18 | #include <vector> |
| 19 | |
| 20 | namespace llvm { |
Anders Carlsson | 4e53328 | 2007-08-17 22:00:32 +0000 | [diff] [blame] | 21 | class Module; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 22 | class Type; |
Devang Patel | 30ec997 | 2007-10-25 18:32:36 +0000 | [diff] [blame] | 23 | class PATypeHolder; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 24 | } |
| 25 | |
| 26 | namespace clang { |
Chris Lattner | d2d2a11 | 2007-07-14 01:29:45 +0000 | [diff] [blame] | 27 | class ASTContext; |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 28 | class TagDecl; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 29 | class TargetInfo; |
| 30 | class QualType; |
Devang Patel | 30ec997 | 2007-10-25 18:32:36 +0000 | [diff] [blame] | 31 | class Type; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 32 | class FunctionTypeProto; |
Devang Patel | b1e3989 | 2007-10-23 23:26:46 +0000 | [diff] [blame] | 33 | class FieldDecl; |
| 34 | class RecordDecl; |
Devang Patel | b84a06e | 2007-10-23 02:10:49 +0000 | [diff] [blame] | 35 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 36 | namespace CodeGen { |
Devang Patel | b84a06e | 2007-10-23 02:10:49 +0000 | [diff] [blame] | 37 | class CodeGenTypes; |
| 38 | |
Devang Patel | b84a06e | 2007-10-23 02:10:49 +0000 | [diff] [blame] | 39 | /// RecordLayoutInfo - This class handles struct and union layout info while |
| 40 | /// lowering AST types to LLVM types. |
| 41 | class RecordLayoutInfo { |
| 42 | RecordLayoutInfo(); // DO NOT IMPLEMENT |
| 43 | public: |
Devang Patel | 057afdd | 2007-10-24 20:38:06 +0000 | [diff] [blame] | 44 | RecordLayoutInfo(llvm::Type *T) : STy(T) { |
| 45 | // FIXME : Collect info about fields that requires adjustments |
| 46 | // (i.e. fields that do not directly map to llvm struct fields.) |
| 47 | } |
Devang Patel | b84a06e | 2007-10-23 02:10:49 +0000 | [diff] [blame] | 48 | |
| 49 | /// getLLVMType - Return llvm type associated with this record. |
Devang Patel | c4c429a | 2007-10-24 00:56:23 +0000 | [diff] [blame] | 50 | llvm::Type *getLLVMType() const { |
Devang Patel | b84a06e | 2007-10-23 02:10:49 +0000 | [diff] [blame] | 51 | return STy; |
| 52 | } |
| 53 | |
| 54 | private: |
| 55 | llvm::Type *STy; |
| 56 | }; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 57 | |
| 58 | /// CodeGenTypes - This class organizes the cross-module state that is used |
| 59 | /// while lowering AST types to LLVM types. |
| 60 | class CodeGenTypes { |
Chris Lattner | d2d2a11 | 2007-07-14 01:29:45 +0000 | [diff] [blame] | 61 | ASTContext &Context; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 62 | TargetInfo &Target; |
Anders Carlsson | 4e53328 | 2007-08-17 22:00:32 +0000 | [diff] [blame] | 63 | llvm::Module& TheModule; |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 64 | |
| 65 | llvm::DenseMap<const TagDecl*, llvm::Type*> TagDeclTypes; |
Devang Patel | b84a06e | 2007-10-23 02:10:49 +0000 | [diff] [blame] | 66 | |
| 67 | /// RecordLayouts - This maps llvm struct type with corresponding |
| 68 | /// record layout info. |
Devang Patel | 71bcb09 | 2007-10-24 00:32:16 +0000 | [diff] [blame] | 69 | /// FIXME : If RecordLayoutInfo is less than 16 bytes then use |
| 70 | /// inline it in the map. |
Devang Patel | b84a06e | 2007-10-23 02:10:49 +0000 | [diff] [blame] | 71 | llvm::DenseMap<const llvm::Type*, RecordLayoutInfo *> RecordLayouts; |
| 72 | |
| 73 | /// FieldInfo - This maps struct field with corresponding llvm struct type |
| 74 | /// field no. This info is populated by record organizer. |
| 75 | llvm::DenseMap<const FieldDecl *, unsigned> FieldInfo; |
| 76 | |
Devang Patel | b1e3989 | 2007-10-23 23:26:46 +0000 | [diff] [blame] | 77 | /// RecordTypesToResolve - This keeps track of record types that are not |
| 78 | /// yet incomplete. One llvm::OpaqueType is associated with each incomplete |
| 79 | /// record. |
| 80 | llvm::DenseMap<const RecordDecl *, llvm::Type *> RecordTypesToResolve; |
| 81 | |
Devang Patel | 30ec997 | 2007-10-25 18:32:36 +0000 | [diff] [blame] | 82 | /// TypeHolderMap - This map keeps cache of llvm::Types (through PATypeHolder) |
| 83 | /// and maps llvm::Types to corresponding clang::Type. llvm::PATypeHolder is |
| 84 | /// used instead of llvm::Type because it allows us to bypass potential |
| 85 | /// dangling type pointers due to type refinement on llvm side. |
| 86 | llvm::DenseMap<Type *, llvm::PATypeHolder *> TypeHolderMap; |
Devang Patel | 5825ac2 | 2007-10-25 21:40:12 +0000 | [diff] [blame] | 87 | |
| 88 | /// ConvertNewType - Convert type T into a llvm::Type. Do not use this |
| 89 | /// method directly because it does not do any type caching. This method |
| 90 | /// is available only for ConvertType(). CovertType() is preferred |
| 91 | /// interface to convert type T into a llvm::Type. |
| 92 | const llvm::Type *ConvertNewType(QualType T); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 93 | public: |
Anders Carlsson | 4e53328 | 2007-08-17 22:00:32 +0000 | [diff] [blame] | 94 | CodeGenTypes(ASTContext &Ctx, llvm::Module &M); |
Devang Patel | b84a06e | 2007-10-23 02:10:49 +0000 | [diff] [blame] | 95 | ~CodeGenTypes(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 96 | |
| 97 | TargetInfo &getTarget() const { return Target; } |
Devang Patel | 86522b9 | 2007-10-29 20:50:19 +0000 | [diff] [blame] | 98 | ASTContext &getContext() const { return Context; } |
Devang Patel | 5825ac2 | 2007-10-25 21:40:12 +0000 | [diff] [blame] | 99 | |
| 100 | /// ConvertType - Convert type T into a llvm::Type. Maintain and use |
| 101 | /// type cache through TypeHOlderMap. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 102 | const llvm::Type *ConvertType(QualType T); |
| 103 | void DecodeArgumentTypes(const FunctionTypeProto &FTP, |
| 104 | std::vector<const llvm::Type*> &ArgTys); |
Devang Patel | b84a06e | 2007-10-23 02:10:49 +0000 | [diff] [blame] | 105 | |
Devang Patel | c4c429a | 2007-10-24 00:56:23 +0000 | [diff] [blame] | 106 | const RecordLayoutInfo *getRecordLayoutInfo(const llvm::Type*) const; |
Devang Patel | b84a06e | 2007-10-23 02:10:49 +0000 | [diff] [blame] | 107 | |
| 108 | /// getLLVMFieldNo - Return llvm::StructType element number |
| 109 | /// that corresponds to the field FD. |
| 110 | unsigned getLLVMFieldNo(const FieldDecl *FD); |
| 111 | |
| 112 | /// addFieldInfo - Assign field number to field FD. |
| 113 | void addFieldInfo(const FieldDecl *FD, unsigned No); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 114 | }; |
Chris Lattner | a7674d8 | 2007-07-13 22:13:22 +0000 | [diff] [blame] | 115 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 116 | } // end namespace CodeGen |
| 117 | } // end namespace clang |
| 118 | |
| 119 | #endif |