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Abstracted more (most) ABI details out of the normal codegen.
author Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
date Tue, 03 Mar 2009 02:51:21 +0100
parents 1714836f2c0b
children 9dca7182aa75
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eef8ac26c66c Some missed LLVMDC -> LDC.
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1 #ifndef LDC_IR_IRFUNCTION_H
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2 #define LDC_IR_IRFUNCTION_H
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4 #include "gen/llvm.h"
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5 #include "ir/ir.h"
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6 #include "ir/irlandingpad.h"
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7
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8 #include <vector>
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9 #include <stack>
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10 #include <map>
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12 struct ABIRewrite;
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13
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14 // represents a function type argument
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15 // both explicit and implicit as well as return values
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16 struct IrFuncTyArg : IrBase
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17 {
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18 Type* type;
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19 const llvm::Type* ltype;
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20 unsigned attrs;
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21 bool byref;
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22
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23 ABIRewrite* rewrite;
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24
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25 bool isInReg() const { return (attrs & llvm::Attribute::InReg) != 0; }
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26 bool isSRet() const { return (attrs & llvm::Attribute::StructRet) != 0; }
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27 bool isByVal() const { return (attrs & llvm::Attribute::ByVal) != 0; }
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28
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29 IrFuncTyArg(Type* t, bool byref, unsigned a = 0);
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30 };
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31
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32 // represents a function type
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33 struct IrFuncTy : IrBase
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34 {
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35 // return value
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36 IrFuncTyArg* ret;
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37
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38 // null if not applicable
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39 IrFuncTyArg* arg_sret;
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40 IrFuncTyArg* arg_this;
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41 IrFuncTyArg* arg_nest;
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42 IrFuncTyArg* arg_arguments;
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43 IrFuncTyArg* arg_argptr;
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44
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45 // normal explicit arguments
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46 LLSmallVector<IrFuncTyArg*, 4> args;
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47
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48 // C varargs
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49 bool c_vararg;
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50
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51 // range of normal parameters to reverse
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52 bool reverseParams;
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53
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54 IrFuncTy()
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55 : ret(NULL),
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56 arg_sret(NULL),
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57 arg_this(NULL),
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58 arg_nest(NULL),
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59 arg_arguments(NULL),
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60 arg_argptr(NULL),
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61 c_vararg(false),
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62 reverseParams(false)
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63 {}
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64
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65 llvm::Value* putRet(Type* dty, llvm::Value* val);
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66 llvm::Value* getRet(Type* dty, llvm::Value* val);
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67
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68 llvm::Value* getParam(Type* dty, int idx, llvm::Value* val);
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69 llvm::Value* putParam(Type* dty, int idx, llvm::Value* val);
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70 };
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71
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72 // represents a function
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73 struct IrFunction : IrBase
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74 {
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75 llvm::Function* func;
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76 llvm::Instruction* allocapoint;
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77 FuncDeclaration* decl;
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78 TypeFunction* type;
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79
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80 bool queued;
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81 bool defined;
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83 llvm::Value* retArg; // return in ptr arg
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84 llvm::Value* thisArg; // class/struct 'this' arg
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85 llvm::Value* nestArg; // nested function 'this' arg
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87 llvm::Value* nestedVar; // nested var alloca
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88
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89 llvm::Value* _arguments;
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90 llvm::Value* _argptr;
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91
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92 llvm::DISubprogram diSubprogram;
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93
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94 // pushes a unique label scope of the given name
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95 void pushUniqueLabelScope(const char* name);
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96 // pops a label scope
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97 void popLabelScope();
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98
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99 // gets the string under which the label's BB
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100 // is stored in the labelToBB map.
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101 // essentially prefixes ident by the strings in labelScopes
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102 std::string getScopedLabelName(const char* ident);
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103
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104 // label to basic block lookup
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105 typedef std::map<std::string, llvm::BasicBlock*> LabelToBBMap;
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106 LabelToBBMap labelToBB;
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107
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108 // landing pads for try statements
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109 IRLandingPad landingPad;
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110
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111 IrFunction(FuncDeclaration* fd);
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112
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113 // annotations
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114 void setNeverInline();
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115 void setAlwaysInline();
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116
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117 private:
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118 // prefix for labels and gotos
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119 // used for allowing labels to be emitted twice
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120 std::vector<std::string> labelScopes;
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121
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122 // next unique id stack
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123 std::stack<int> nextUnique;
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124 };
0e28624814e8 [svn r140] did a lot of the work towards being able to pass multiple modules on the command line. not complete yet though
lindquist
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125
0e28624814e8 [svn r140] did a lot of the work towards being able to pass multiple modules on the command line. not complete yet though
lindquist
parents:
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126 #endif