Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 1 | //===----- CGCall.h - Encapsulate calling convention details ----*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // These classes wrap the information about a call or function |
| 11 | // definition used to handle ABI compliancy. |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
| 15 | #ifndef CLANG_CODEGEN_CGCALL_H |
| 16 | #define CLANG_CODEGEN_CGCALL_H |
| 17 | |
Anders Carlsson | 31777a2 | 2009-12-24 19:08:58 +0000 | [diff] [blame] | 18 | #include "llvm/ADT/FoldingSet.h" |
| 19 | #include "llvm/Value.h" |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 20 | #include "clang/AST/Type.h" |
| 21 | |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 22 | #include "CGValue.h" |
| 23 | |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 24 | // FIXME: Restructure so we don't have to expose so much stuff. |
| 25 | #include "ABIInfo.h" |
| 26 | |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 27 | namespace llvm { |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 28 | struct AttributeWithIndex; |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 29 | class Function; |
| 30 | class Type; |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 31 | class Value; |
| 32 | |
| 33 | template<typename T, unsigned> class SmallVector; |
| 34 | } |
| 35 | |
| 36 | namespace clang { |
| 37 | class ASTContext; |
| 38 | class Decl; |
| 39 | class FunctionDecl; |
| 40 | class ObjCMethodDecl; |
Daniel Dunbar | 7c08651 | 2008-09-09 23:14:03 +0000 | [diff] [blame] | 41 | class VarDecl; |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 42 | |
| 43 | namespace CodeGen { |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 44 | typedef llvm::SmallVector<llvm::AttributeWithIndex, 8> AttributeListType; |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 45 | |
| 46 | /// CallArgList - Type for representing both the value and type of |
| 47 | /// arguments in a call. |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 48 | typedef llvm::SmallVector<std::pair<RValue, QualType>, 16> CallArgList; |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 49 | |
Daniel Dunbar | 7c08651 | 2008-09-09 23:14:03 +0000 | [diff] [blame] | 50 | /// FunctionArgList - Type for representing both the decl and type |
| 51 | /// of parameters to a function. The decl must be either a |
| 52 | /// ParmVarDecl or ImplicitParamDecl. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 53 | typedef llvm::SmallVector<std::pair<const VarDecl*, QualType>, |
Daniel Dunbar | 7c08651 | 2008-09-09 23:14:03 +0000 | [diff] [blame] | 54 | 16> FunctionArgList; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 55 | |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 56 | /// CGFunctionInfo - Class to encapsulate the information about a |
| 57 | /// function definition. |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 58 | class CGFunctionInfo : public llvm::FoldingSetNode { |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 59 | struct ArgInfo { |
| 60 | QualType type; |
| 61 | ABIArgInfo info; |
| 62 | }; |
| 63 | |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 64 | /// The LLVM::CallingConv to use for this function (as specified by the |
| 65 | /// user). |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 66 | unsigned CallingConvention; |
| 67 | |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 68 | /// The LLVM::CallingConv to actually use for this function, which may |
| 69 | /// depend on the ABI. |
| 70 | unsigned EffectiveCallingConvention; |
| 71 | |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 72 | unsigned NumArgs; |
| 73 | ArgInfo *Args; |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 74 | |
| 75 | public: |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 76 | typedef const ArgInfo *const_arg_iterator; |
| 77 | typedef ArgInfo *arg_iterator; |
Daniel Dunbar | a0a99e0 | 2009-02-02 23:43:58 +0000 | [diff] [blame] | 78 | |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 79 | CGFunctionInfo(unsigned CallingConvention, |
| 80 | QualType ResTy, |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 81 | const llvm::SmallVector<QualType, 16> &ArgTys); |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 82 | ~CGFunctionInfo() { delete[] Args; } |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 83 | |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 84 | const_arg_iterator arg_begin() const { return Args + 1; } |
| 85 | const_arg_iterator arg_end() const { return Args + 1 + NumArgs; } |
| 86 | arg_iterator arg_begin() { return Args + 1; } |
| 87 | arg_iterator arg_end() { return Args + 1 + NumArgs; } |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 88 | |
Daniel Dunbar | 4b5f0a4 | 2009-02-04 21:17:21 +0000 | [diff] [blame] | 89 | unsigned arg_size() const { return NumArgs; } |
| 90 | |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 91 | /// getCallingConvention - Return the user specified calling |
| 92 | /// convention. |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 93 | unsigned getCallingConvention() const { return CallingConvention; } |
| 94 | |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 95 | /// getEffectiveCallingConvention - Return the actual calling convention to |
| 96 | /// use, which may depend on the ABI. |
| 97 | unsigned getEffectiveCallingConvention() const { |
| 98 | return EffectiveCallingConvention; |
| 99 | } |
| 100 | void setEffectiveCallingConvention(unsigned Value) { |
| 101 | EffectiveCallingConvention = Value; |
| 102 | } |
| 103 | |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 104 | QualType getReturnType() const { return Args[0].type; } |
| 105 | |
| 106 | ABIArgInfo &getReturnInfo() { return Args[0].info; } |
| 107 | const ABIArgInfo &getReturnInfo() const { return Args[0].info; } |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 108 | |
| 109 | void Profile(llvm::FoldingSetNodeID &ID) { |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 110 | ID.AddInteger(getCallingConvention()); |
Daniel Dunbar | 35e67d4 | 2009-02-05 00:00:23 +0000 | [diff] [blame] | 111 | getReturnType().Profile(ID); |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 112 | for (arg_iterator it = arg_begin(), ie = arg_end(); it != ie; ++it) |
| 113 | it->type.Profile(ID); |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 114 | } |
| 115 | template<class Iterator> |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 116 | static void Profile(llvm::FoldingSetNodeID &ID, |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 117 | unsigned CallingConvention, |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 118 | QualType ResTy, |
| 119 | Iterator begin, |
| 120 | Iterator end) { |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 121 | ID.AddInteger(CallingConvention); |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 122 | ResTy.Profile(ID); |
| 123 | for (; begin != end; ++begin) |
| 124 | begin->Profile(ID); |
| 125 | } |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 126 | }; |
Anders Carlsson | 31777a2 | 2009-12-24 19:08:58 +0000 | [diff] [blame] | 127 | |
| 128 | class ReturnValueSlot { |
| 129 | llvm::PointerIntPair<llvm::Value *, 1, bool> Value; |
| 130 | |
| 131 | public: |
| 132 | ReturnValueSlot() {} |
| 133 | ReturnValueSlot(llvm::Value *Value, bool IsVolatile) |
| 134 | : Value(Value, IsVolatile) {} |
| 135 | |
| 136 | bool isNull() const { return !getValue(); } |
| 137 | |
| 138 | bool isVolatile() const { return Value.getInt(); } |
| 139 | llvm::Value *getValue() const { return Value.getPointer(); } |
| 140 | }; |
| 141 | |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 142 | } // end namespace CodeGen |
| 143 | } // end namespace clang |
| 144 | |
| 145 | #endif |