Mercurial > projects > dang
annotate gen/CodeGen.d @ 82:06dda301ea61 new_gen
Can declare outside functions and call c-functions
author | Anders Johnsen <skabet@gmail.com> |
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date | Fri, 02 May 2008 19:51:58 +0200 |
parents | 110c7e1c4ca2 |
children | 9e90694f5da0 |
rev | line source |
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1 module gen.CodeGen; |
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2 |
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3 import tango.io.Stdout, |
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4 Int = tango.text.convert.Integer; |
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5 import tango.core.Array : find, partition; |
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6 |
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7 import llvm.llvm; |
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8 |
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9 import ast.Decl, |
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10 ast.Stmt, |
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11 ast.Exp; |
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12 |
58 | 13 import misc.Error, |
14 basic.SmallArray; | |
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15 |
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16 import lexer.Token; |
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17 |
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18 import sema.SymbolTableBuilder, |
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19 sema.Visitor; |
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20 |
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21 private char[] genBuildCmp(char[] p) |
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22 { |
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23 return ` |
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24 Value build`~p~`(Value l, Value r, char[] n) |
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25 { |
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26 return b.buildICmp(IntPredicate.`~p~`, l, r, n); |
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27 }`; |
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28 } |
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29 |
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30 class CodeGen |
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31 { |
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32 private: |
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33 mixin(genBuildCmp("EQ")); |
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34 mixin(genBuildCmp("NE")); |
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35 mixin(genBuildCmp("SLT")); |
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36 mixin(genBuildCmp("SLE")); |
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37 mixin(genBuildCmp("SGT")); |
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38 mixin(genBuildCmp("SGE")); |
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39 |
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40 public: |
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41 this() |
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42 { |
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43 alias BinaryExp.Operator op; |
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44 b = new Builder; |
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45 |
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46 opToLLVM = [ |
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47 op.Add : &b.buildAdd, |
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48 op.Sub : &b.buildSub, |
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49 op.Mul : &b.buildMul, |
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50 op.Div : &b.buildSDiv, |
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51 op.Eq : &buildEQ, |
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52 op.Ne : &buildNE, |
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53 op.Lt : &buildSLT, |
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54 op.Le : &buildSLE, |
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55 op.Gt : &buildSGT, |
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56 op.Ge : &buildSGE |
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57 ]; |
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58 table = new SimpleSymbolTable(); |
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59 |
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60 createBasicTypes(); |
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61 } |
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62 |
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63 ~this() |
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64 { |
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65 b.dispose(); |
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66 } |
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67 |
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68 void gen(Decl[] decls, bool optimize, bool inline) |
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69 { |
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70 // create module |
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71 m = new Module("main_module"); |
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72 scope(exit) m.dispose(); |
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73 |
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74 table.enterScope; |
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75 |
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76 BytePtr = PointerType.Get(Type.Int8); |
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77 auto temp = FunctionType.Get(Type.Void, [BytePtr, BytePtr, Type.Int32, Type.Int32]); |
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78 llvm_memcpy = m.addFunction(temp, "llvm.memcpy.i32"); |
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79 |
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80 auto registerFunc = |
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81 (FuncDecl fd) |
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82 { |
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83 Type[] param_types; |
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84 foreach (i, p; fd.funcArgs) |
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85 { |
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86 DType t = p.env.findType(p.varType); |
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87 if(auto st = cast(DStruct)t) |
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88 { |
381975d76baf
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89 Type pointer = PointerType.Get(llvm(st)); |
381975d76baf
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90 param_types ~= pointer; |
381975d76baf
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91 } |
381975d76baf
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Anders Johnsen <skabet@gmail.com>
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92 else |
381975d76baf
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93 param_types ~= llvm(t); |
381975d76baf
A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
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94 } |
381975d76baf
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95 auto ret_t = fd.env.find(fd.identifier).type; |
381975d76baf
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96 if(auto st = cast(DStruct)ret_t) |
381975d76baf
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97 ret_t = DType.Void; |
381975d76baf
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98 else if(auto f = cast(DFunction)ret_t) |
381975d76baf
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99 ret_t = f.returnType; |
381975d76baf
A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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100 auto func_t = FunctionType.Get(llvm(ret_t), param_types); |
381975d76baf
A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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101 auto llfunc = m.addFunction(func_t, fd.identifier.get); |
381975d76baf
A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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102 |
381975d76baf
A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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103 foreach (i, p; fd.funcArgs) |
381975d76baf
A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
parents:
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104 { |
381975d76baf
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Anders Johnsen <skabet@gmail.com>
parents:
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105 if(i == 0 && fd.sret) |
381975d76baf
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Anders Johnsen <skabet@gmail.com>
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106 llfunc.addParamAttr(0, ParamAttr.StructRet); |
381975d76baf
A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
parents:
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107 |
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108 DType t = p.env.findType(p.varType); |
68
381975d76baf
A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
parents:
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109 if(auto st = cast(DStruct)t) |
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110 { |
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111 if(i == 0 && fd.sret) |
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112 continue; |
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113 llfunc.addParamAttr(i,ParamAttr.ByVal); |
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114 } |
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115 } |
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116 }; |
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117 auto visitor = new VisitFuncDecls(registerFunc); |
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118 visitor.visit(decls); |
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119 // Before beginning we move all top level var-decls to the start |
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120 // and then we generate the var-decls first |
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121 // partition is NOT required to be stable, but that should not create |
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122 // any problems. |
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123 partition(decls, (Decl d) { return d.declType == DeclType.VarDecl; }); |
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124 |
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125 foreach (decl; decls) |
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126 genRootDecl(decl); |
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127 |
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128 table.leaveScope; |
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129 |
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130 m.verify(); |
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131 |
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132 if(optimize) |
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133 m.optimize(inline); |
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134 |
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135 m.writeBitcodeToFile("out.bc"); |
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136 } |
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137 |
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138 void genRootDecl(Decl decl) |
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139 { |
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140 switch(decl.declType) |
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141 { |
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142 case DeclType.FuncDecl: |
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143 FuncDecl funcDecl = cast(FuncDecl)decl; |
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144 |
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145 // Empty function - declare; |
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146 if(funcDecl.emptyFunction) |
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147 return; |
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148 |
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149 llvm(funcDecl.type); |
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150 auto llfunc = m.getNamedFunction(funcDecl.type.name); |
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151 auto func_tp = cast(PointerType)llfunc.type; |
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152 auto func_t = cast(FunctionType)func_tp.elementType(); |
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153 auto ret_t = func_t.returnType(); |
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154 |
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155 auto bb = llfunc.appendBasicBlock("entry"); |
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156 b.positionAtEnd(bb); |
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157 |
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158 table.enterScope; |
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159 foreach (i, v; funcDecl.funcArgs) |
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160 { |
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161 llfunc.getParam(i).name = v.identifier.get; |
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162 auto name = v.identifier.get; |
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163 if(!cast(PointerType)llfunc.getParam(i).type) |
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164 { |
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165 auto AI = b.buildAlloca(llfunc.getParam(i).type, name); |
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166 // Value va = b.buildLoad(val, name); |
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167 b.buildStore(llfunc.getParam(i), AI); |
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168 table[name] = AI; |
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169 } |
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170 else |
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171 table[name] = llfunc.getParam(i); |
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172 } |
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173 |
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174 foreach (stmt; funcDecl.statements) |
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175 genStmt(stmt); |
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176 |
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177 // if the function didn't end with a return, we automatically |
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178 // add one (return 0 as default) |
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179 if (b.getInsertBlock().terminated() is false) |
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180 if (ret_t is Type.Void) |
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181 b.buildRetVoid(); |
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182 else |
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183 b.buildRet(ConstantInt.GetS(ret_t, 0)); |
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184 |
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185 table.leaveScope; |
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186 break; |
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187 |
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188 case DeclType.VarDecl: |
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189 auto varDecl = cast(VarDecl)decl; |
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190 auto sym = varDecl.env.find(varDecl.identifier); |
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191 Type t = llvm(sym.type); |
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192 GlobalVariable g = m.addGlobal(t, sym.id.get); |
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193 g.initializer = ConstantInt.GetS(t, 0); |
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194 table[varDecl.identifier.get] = g; |
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195 break; |
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196 |
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197 case DeclType.StructDecl: |
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198 auto structDecl = cast(StructDecl)decl; |
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199 llvm(structDecl.type); |
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200 //m.addTypeName(structDecl.identifier.get, llvm(structDecl.type)); |
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201 break; |
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202 |
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203 default: |
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204 break; |
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205 } |
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206 } |
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207 |
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208 void genDecl(Decl decl) |
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209 { |
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210 switch(decl.declType) |
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211 { |
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212 case DeclType.VarDecl: |
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213 auto varDecl = cast(VarDecl)decl; |
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214 auto name = varDecl.identifier.get; |
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215 auto sym = varDecl.env.find(varDecl.identifier); |
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216 auto AI = b.buildAlloca(llvm(sym.type), name); |
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217 table[name] = AI; |
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218 if (varDecl.init) |
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219 buildAssign(varDecl.identifier, varDecl.init); |
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220 break; |
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221 |
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222 default: |
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223 } |
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224 } |
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225 |
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226 struct PE |
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227 { |
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228 static char[] NoImplicitConversion = |
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229 "Can't find an implicit conversion between %0 and %1"; |
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230 static char[] VoidRetInNonVoidFunc = |
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231 "Only void functions can return without an expression"; |
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232 } |
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233 |
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234 void sextSmallerToLarger(ref Value left, ref Value right) |
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235 { |
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236 if (left.type != right.type) |
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237 { |
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238 // try to find a convertion - only works for iX |
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239 IntegerType l = cast(IntegerType) left.type; |
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240 IntegerType r = cast(IntegerType) right.type; |
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241 if (l is null || r is null) |
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242 throw error(__LINE__, PE.NoImplicitConversion) |
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243 .arg(left.type.toString) |
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244 .arg(right.type.toString); |
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245 |
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246 if (l.numBits() < r.numBits()) |
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247 left = b.buildSExt(left, r, ".cast"); |
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248 else |
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249 right = b.buildSExt(right, l, ".cast"); |
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250 } |
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251 } |
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252 |
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253 Value genExpression(Exp exp) |
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254 { |
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255 switch(exp.expType) |
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256 { |
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257 case ExpType.Binary: |
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258 auto binaryExp = cast(BinaryExp)exp; |
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259 |
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260 auto left = genExpression(binaryExp.left); |
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261 auto right = genExpression(binaryExp.right); |
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262 |
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263 // sextSmallerToLarger(left, right); |
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264 |
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265 OpBuilder op = opToLLVM[binaryExp.op]; |
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266 |
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267 return op(left, right, "."); |
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268 |
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269 case ExpType.IntegerLit: |
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270 auto integetLit = cast(IntegerLit)exp; |
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271 auto val = integetLit.get; |
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272 return ConstantInt.GetS(Type.Int32, Integer.parse(val)); |
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273 case ExpType.Negate: |
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274 auto negateExp = cast(NegateExp)exp; |
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275 auto target = genExpression(negateExp.exp); |
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276 return b.buildNeg(target, "neg"); |
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277 case ExpType.Deref: |
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278 auto derefExp = cast(DerefExp)exp; |
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279 auto target = genExpression(derefExp.exp); |
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280 return b.buildLoad(target, "deref"); |
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281 case ExpType.AssignExp: |
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282 auto assignExp = cast(AssignExp)exp; |
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283 return buildAssign(assignExp.identifier, assignExp.exp); |
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284 case ExpType.CallExp: |
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285 auto callExp = cast(CallExp)exp; |
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286 auto func_sym = exp.env.find(cast(Identifier)callExp.exp); |
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287 Value[] args; |
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288 foreach (arg; callExp.args) |
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289 { |
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290 Value v = genExpression(arg); |
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291 args ~= v; |
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292 |
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293 } |
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294 // BUG: doesn't do implicit type-conversion |
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295 if(callExp.sret) |
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296 return b.buildCall(m.getNamedFunction(func_sym.id.get), args, ""); |
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297 return b.buildCall(m.getNamedFunction(func_sym.id.get), args, ".call"); |
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298 case ExpType.CastExp: |
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299 auto castExp = cast(CastExp)exp; |
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300 auto value = genExpression(castExp.exp); |
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301 |
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302 if(!castExp.type.hasImplicitConversionTo(castExp.type)) |
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303 assert(0, "Invalid cast"); |
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304 |
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305 Value v; |
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306 if(castExp.exp.type.byteSize <= castExp.type.byteSize) |
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307 v = b.buildZExt(value, llvm(castExp.type), "cast"); |
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308 else |
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309 v = b.buildTrunc(value, llvm(castExp.type), "cast"); |
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310 |
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311 return v; |
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312 |
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313 case ExpType.Identifier: |
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314 auto identifier = cast(Identifier)exp; |
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315 auto sym = exp.env.find(identifier); |
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316 if(sym.type.isStruct) |
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317 return table.find(sym.id.get); |
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318 else |
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319 return b.buildLoad(table.find(sym.id.get), sym.id.get); |
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320 case ExpType.MemberReference: |
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321 auto v = getPointer(exp); |
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322 // return v; |
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323 return b.buildLoad(v, v.name); |
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324 } |
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325 assert(0, "Reached end of switch in genExpression"); |
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326 return null; |
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327 } |
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328 |
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329 void genStmt(Stmt stmt) |
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330 { |
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331 switch(stmt.stmtType) |
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332 { |
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333 case StmtType.Compound: |
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334 auto stmts = cast(CompoundStatement)stmt; |
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335 foreach (s; stmts.statements) |
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336 genStmt(s); |
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337 break; |
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338 case StmtType.Return: |
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339 auto ret = cast(ReturnStmt)stmt; |
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340 DFunction type = stmt.env.parentFunction().type(); |
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341 Type t = llvm(type.returnType); |
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342 if (ret.exp is null) |
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343 if (t is Type.Void) |
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344 { |
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345 b.buildRetVoid(); |
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346 return; |
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347 } |
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348 else |
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349 throw error(__LINE__, PE.VoidRetInNonVoidFunc); |
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350 |
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351 Value v = genExpression(ret.exp); |
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352 /* if (v.type != t) |
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353 { |
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354 IntegerType v_t = cast(IntegerType) v.type; |
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355 IntegerType i_t = cast(IntegerType) t; |
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356 if (v_t is null || i_t is null) |
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357 throw error(__LINE__, PE.NoImplicitConversion) |
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358 .arg(v.type.toString) |
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359 .arg(t.toString); |
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360 |
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361 if (v_t.numBits() < i_t.numBits()) |
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362 v = b.buildSExt(v, t, ".cast"); |
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363 else |
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364 v = b.buildTrunc(v, t, ".cast"); |
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365 }*/ |
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366 b.buildRet(v); |
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367 break; |
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368 case StmtType.Decl: |
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369 auto declStmt = cast(DeclStmt)stmt; |
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370 genDecl(declStmt.decl); |
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371 break; |
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372 case StmtType.Exp: |
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373 auto expStmt = cast(ExpStmt)stmt; |
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374 genExpression(expStmt.exp); |
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375 break; |
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376 case StmtType.If: |
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377 auto ifStmt = cast(IfStmt)stmt; |
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378 Value cond = genExpression(ifStmt.cond); |
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379 if (cond.type !is Type.Int1) |
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380 { |
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381 Value False = ConstantInt.GetS(cond.type, 0); |
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382 cond = b.buildICmp(IntPredicate.NE, cond, False, ".cond"); |
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383 } |
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384 auto func_name = stmt.env.parentFunction().identifier.get; |
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385 Function func = m.getNamedFunction(func_name); |
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386 bool has_else = (ifStmt.else_body !is null); |
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387 |
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388 auto thenBB = func.appendBasicBlock("then"); |
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389 auto elseBB = has_else? func.appendBasicBlock("else") : null; |
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390 auto mergeBB = func.appendBasicBlock("merge"); |
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391 |
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392 b.buildCondBr(cond, thenBB, has_else? elseBB : mergeBB); |
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393 b.positionAtEnd(thenBB); |
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394 genStmt(ifStmt.then_body); |
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395 thenBB = b.getInsertBlock(); |
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396 if (b.getInsertBlock().terminated() is false) |
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397 b.buildBr(mergeBB); |
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398 |
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399 if (has_else) |
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400 { |
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401 b.positionAtEnd(elseBB); |
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402 genStmt(ifStmt.else_body); |
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403 elseBB = b.getInsertBlock(); |
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404 if (elseBB.terminated() is false) |
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405 b.buildBr(mergeBB); |
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406 } |
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407 |
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408 b.positionAtEnd(mergeBB); |
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409 break; |
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410 case StmtType.While: |
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411 auto wStmt = cast(WhileStmt)stmt; |
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412 auto func_name = stmt.env.parentFunction().identifier.get; |
51
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413 Function func = m.getNamedFunction(func_name); |
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414 |
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415 auto condBB = func.appendBasicBlock("cond"); |
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416 auto bodyBB = func.appendBasicBlock("body"); |
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417 auto doneBB = func.appendBasicBlock("done"); |
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418 |
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419 b.buildBr(condBB); |
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420 b.positionAtEnd(condBB); |
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421 Value cond = genExpression(wStmt.cond); |
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422 if (cond.type !is Type.Int1) |
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423 { |
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424 Value False = ConstantInt.GetS(cond.type, 0); |
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425 cond = b.buildICmp(IntPredicate.NE, cond, False, ".cond"); |
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426 } |
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427 b.buildCondBr(cond, bodyBB, doneBB); |
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428 |
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429 b.positionAtEnd(bodyBB); |
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430 genStmt(wStmt.whileBody); |
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431 if (b.getInsertBlock().terminated() is false) |
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432 b.buildBr(condBB); |
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433 |
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434 b.positionAtEnd(doneBB); |
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435 break; |
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436 case StmtType.Switch: |
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437 auto sw = cast(SwitchStmt)stmt; |
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438 Value cond = genExpression(sw.cond); |
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439 |
56
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440 auto func_name = stmt.env.parentFunction().identifier.get; |
51
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441 Function func = m.getNamedFunction(func_name); |
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442 |
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443 BasicBlock oldBB = b.getInsertBlock(); |
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444 BasicBlock defBB; |
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445 BasicBlock endBB = func.appendBasicBlock("sw.end"); |
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446 if (sw.defaultBlock) |
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447 { |
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448 defBB = Function.InsertBasicBlock(endBB, "sw.def"); |
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449 b.positionAtEnd(defBB); |
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450 foreach (case_statement; sw.defaultBlock) |
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451 genStmt(case_statement); |
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452 if (!defBB.terminated()) |
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453 b.buildBr(endBB); |
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454 b.positionAtEnd(oldBB); |
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|
455 } |
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456 else |
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457 defBB = endBB; |
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458 auto SI = b.buildSwitch(cond, defBB, sw.cases.length); |
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459 foreach (c; sw.cases) |
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changeset
|
460 { |
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|
461 BasicBlock prevBB; |
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462 foreach (i, val; c.values) |
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Rearranged some stuff, and renamed LLVMGen -> CodeGen
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463 { |
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464 auto BB = Function.InsertBasicBlock(defBB, "sw.bb"); |
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465 SI.addCase(ConstantInt.GetS(cond.type, c.values_converted[i]), BB); |
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466 |
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467 if (i + 1 == c.values.length) |
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468 { |
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469 b.positionAtEnd(BB); |
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470 foreach (case_statement; c.stmts) |
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471 genStmt(case_statement); |
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472 if (!BB.terminated()) |
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473 b.buildBr(c.followedByDefault? defBB : endBB); |
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474 } |
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475 |
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476 if (prevBB !is null && !prevBB.terminated()) |
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Rearranged some stuff, and renamed LLVMGen -> CodeGen
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477 { |
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478 b.positionAtEnd(prevBB); |
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479 b.buildBr(BB); |
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480 } |
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481 prevBB = BB; |
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482 } |
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483 } |
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484 b.positionAtEnd(endBB); |
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485 break; |
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486 } |
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487 } |
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488 |
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489 Value getPointer(Exp exp) |
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490 { |
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491 switch(exp.expType) |
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492 { |
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493 case ExpType.Identifier: |
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494 auto identifier = cast(Identifier)exp; |
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495 auto sym = exp.env.find(identifier); |
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496 return table.find(sym.id.get); |
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497 case ExpType.Deref: |
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498 auto derefExp = cast(DerefExp)exp; |
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499 auto target = getPointer(derefExp.exp); |
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500 return b.buildLoad(target, "deref"); |
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Now structs are somewhat useable to use.
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501 case ExpType.MemberReference: |
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502 auto mem = cast(MemberReference)exp; |
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503 Stdout(mem.target).newline; |
51
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504 switch(mem.target.expType) |
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505 { |
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506 case ExpType.Identifier: |
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507 auto identifier = cast(Identifier)mem.target; |
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508 auto child = mem.child; |
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509 auto sym = exp.env.find(identifier); |
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510 auto symChild = child.env.find(child); |
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511 Value v = table.find(sym.id.get); |
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512 DType t = sym.type; |
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513 auto st = t.asStruct; |
51
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514 |
55
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515 int i = st.indexOf(child.get); |
51
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516 |
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517 Value[] vals; |
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518 vals ~= ConstantInt.Get(IntegerType.Int32, 0, false); |
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519 vals ~= ConstantInt.Get(IntegerType.Int32, i, false); |
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520 |
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521 Value val = b.buildGEP(v, vals, sym.id.get~"."~child.get); |
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522 return val; |
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523 |
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524 case ExpType.MemberReference: |
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525 auto v = getPointer(mem.target); |
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526 auto child = mem.child; |
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527 auto symChild = child.env.find(child); |
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528 DType t = mem.target.type; |
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529 auto st = t.asStruct; |
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530 |
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531 int i = st.indexOf(child.get); |
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532 |
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533 Value[] vals; |
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534 vals ~= ConstantInt.Get(IntegerType.Int32, 0, false); |
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535 vals ~= ConstantInt.Get(IntegerType.Int32, i, false); |
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536 |
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537 Value val = b.buildGEP(v, vals, "."~child.get); |
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538 return val; |
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539 |
51
c96cdcbdb9d6
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540 default: |
c96cdcbdb9d6
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Anders Halager <halager@gmail.com>
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|
541 Value val = genExpression(exp); |
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Rearranged some stuff, and renamed LLVMGen -> CodeGen
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542 auto AI = b.buildAlloca(val.type, ".s"); |
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543 return b.buildStore(val, AI); |
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diff
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|
544 } |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
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545 default: |
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546 Value val = genExpression(exp); |
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547 auto AI = b.buildAlloca(val.type, ".s"); |
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Rearranged some stuff, and renamed LLVMGen -> CodeGen
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parents:
diff
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548 return b.buildStore(val, AI); |
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|
549 } |
c96cdcbdb9d6
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Anders Halager <halager@gmail.com>
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550 assert(0, "Reached end of switch in getPointer"); |
c96cdcbdb9d6
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551 return null; |
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552 } |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
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diff
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|
553 |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
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554 private Value buildAssign(Exp target, Exp exp) |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
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diff
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|
555 { |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
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|
556 Value t = getPointer(target); |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
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557 Value v = genExpression(exp); |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
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diff
changeset
|
558 |
c96cdcbdb9d6
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diff
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|
559 auto a = cast(PointerType)t.type; |
c96cdcbdb9d6
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parents:
diff
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|
560 |
c96cdcbdb9d6
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parents:
diff
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|
561 assert(a, "Assing to type have to be of type PointerType"); |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
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562 |
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Anders Halager <halager@gmail.com>
parents:
diff
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563 Type value_type = v.type; |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
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diff
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564 if (auto value_ptr = cast(PointerType)v.type) |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
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parents:
diff
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|
565 { |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
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parents:
diff
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|
566 value_type = value_ptr.elementType; |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
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parents:
diff
changeset
|
567 |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
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parents:
diff
changeset
|
568 if (a.elementType is value_type && cast(StructType)value_type) |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
changeset
|
569 { |
c96cdcbdb9d6
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Anders Halager <halager@gmail.com>
parents:
diff
changeset
|
570 // bitcast "from" to i8* |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
changeset
|
571 Value from = b.buildBitCast(v, BytePtr, ".copy_from"); |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
changeset
|
572 // bitcast "to" to i8* |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
changeset
|
573 Value to = b.buildBitCast(t, BytePtr, ".copy_to"); |
56
4ae365eff712
Now return types works for structs... Also, simplyfing in AST have been startet - but still messy. This update is a little messy...
Anders Johnsen <skabet@gmail.com>
parents:
55
diff
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|
574 // call llvm.memcpy.i32( "to", "from", type_size, alignment (32 in clang) ); |
4ae365eff712
Now return types works for structs... Also, simplyfing in AST have been startet - but still messy. This update is a little messy...
Anders Johnsen <skabet@gmail.com>
parents:
55
diff
changeset
|
575 b.buildCall(llvm_memcpy, [to, from, ConstantInt.GetS(Type.Int32, 4), ConstantInt.GetS(Type.Int32, 32)], null); |
51
c96cdcbdb9d6
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parents:
diff
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|
576 // return "to" |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
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parents:
diff
changeset
|
577 return t; |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
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parents:
diff
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|
578 } |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
changeset
|
579 } |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
changeset
|
580 |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
changeset
|
581 if (value_type != a.elementType) |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
changeset
|
582 { |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
changeset
|
583 IntegerType v_t = cast(IntegerType) value_type; |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
changeset
|
584 IntegerType i_t = cast(IntegerType) a.elementType; |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
changeset
|
585 if (v_t is null || i_t is null) |
c96cdcbdb9d6
Rearranged some stuff, and renamed LLVMGen -> CodeGen
Anders Halager <halager@gmail.com>
parents:
diff
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586 throw error(__LINE__, PE.NoImplicitConversion) |
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587 .arg(a.elementType.toString) |
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588 .arg(v.type.toString); |
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589 |
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590 if (v_t.numBits() < i_t.numBits()) |
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591 v = b.buildSExt(v, a.elementType, ".cast"); |
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592 else |
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593 v = b.buildTrunc(v, a.elementType, ".cast"); |
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594 } |
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595 return b.buildStore(v, t); |
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596 } |
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597 |
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598 Error error(uint line, char[] msg) |
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599 { |
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600 return new Error(msg); |
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601 } |
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602 |
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603 /** |
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604 Get the LLVM Type corresponding to a DType. |
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605 |
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606 Currently using the built-in associative array - not sure if it works |
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607 well when the hashes are so uniform. |
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608 |
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609 Other possibilities would be to find a hash-function that works on |
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610 something as small as 4 bytes or to create a sparse array perhaps. |
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611 */ |
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612 Type llvm(DType t) |
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613 { |
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614 if (auto llvm_t = t in type_map) |
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615 return *llvm_t; |
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616 return llvmCreateNew(t); |
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617 } |
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618 |
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619 // Create an LLVM type and insert it into the type map, and return the |
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620 // result |
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621 Type llvmCreateNew(DType t) |
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622 { |
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623 if (auto i = cast(DInteger)t) |
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624 { |
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625 Type res = IntegerType.Get(i.byteSize() * 8); |
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626 type_map[t] = res; |
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627 return res; |
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628 } |
64
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629 else if (auto s = t.asStruct) |
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630 { |
58 | 631 SmallArray!(Type, 8) members; |
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632 DType[] array; |
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633 array.length = s.members.length; |
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634 |
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635 foreach(m; s.members) |
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636 array[m.index] = m.type; |
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637 |
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638 foreach(m; array) |
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639 members ~= llvm(m); |
53
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640 |
58 | 641 Type res = StructType.Get(members.unsafe()); |
53
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642 type_map[t] = res; |
64
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643 m.addTypeName(s.name, res); |
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644 return res; |
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645 } |
64
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646 else if (auto f = t.asFunction) |
59
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647 { |
64
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648 // We should never have a function returning structs, because of |
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649 // the simplify step |
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650 assert(f.returnType.isStruct() == false, "Can't return structs"); |
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651 Type ret_t = llvm(f.returnType); |
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652 |
59
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653 SmallArray!(Type, 8) params; |
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654 foreach(param; f.params) |
64
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655 if (param.isStruct) |
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656 params ~= PointerType.Get(llvm(param)); |
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657 else |
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658 params ~= llvm(param); |
59
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659 |
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660 Type res = FunctionType.Get(ret_t, params.unsafe()); |
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661 type_map[t] = res; |
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662 /* auto llfunc = m.addFunction(res, f.name); |
64
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663 |
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664 foreach (i, param; f.params) |
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665 if (param.isStruct) |
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666 llfunc.addParamAttr(i, ParamAttr.ByVal); |
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667 |
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668 if (f.firstParamIsReturnValue) |
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669 { |
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670 llfunc.removeParamAttr(0, ParamAttr.ByVal); |
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671 llfunc.addParamAttr(0, ParamAttr.StructRet); |
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672 } |
68
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673 */ |
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674 return res; |
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675 } |
77
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676 else if (auto f = t.asPointer) |
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677 { |
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678 Type res = PointerType.Get(llvm(f.pointerOf)); |
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679 type_map[t] = res; |
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680 return res; |
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681 } |
81 | 682 else if (auto f = t.asArray) |
683 { | |
684 Type res = ArrayType.Get(llvm(f.arrayOf), f.size); | |
685 type_map[t] = res; | |
686 return res; | |
687 } | |
59
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688 assert(0, "Only integers, structs and functions are supported"); |
51
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689 } |
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690 |
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691 // Might as well insert all the basic types from the start |
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692 void createBasicTypes() |
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693 { |
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694 type_map[DType.Void] = Type.Void; |
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695 |
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696 type_map[DType.Bool] = Type.Int1; |
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697 type_map[DType.Byte] = Type.Int8; |
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698 type_map[DType.UByte] = Type.Int8; |
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699 type_map[DType.Short] = Type.Int16; |
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700 type_map[DType.UShort] = Type.Int16; |
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701 type_map[DType.Int] = Type.Int32; |
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702 type_map[DType.UInt] = Type.Int32; |
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703 type_map[DType.Long] = Type.Int64; |
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704 type_map[DType.ULong] = Type.Int64; |
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705 } |
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|
706 |
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Rearranged some stuff, and renamed LLVMGen -> CodeGen
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707 private: |
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708 |
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709 // llvm stuff |
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710 Module m; |
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711 Builder b; |
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712 Function llvm_memcpy; |
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713 Type BytePtr; |
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714 Type[DType] type_map; |
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715 |
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716 FuncDecl[char[]] functions; |
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717 |
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718 SimpleSymbolTable table; |
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719 alias Value delegate(Value, Value, char[]) OpBuilder; |
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720 static OpBuilder[BinaryExp.Operator] opToLLVM; |
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721 } |
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722 |
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723 private class VisitFuncDecls : Visitor!(void) |
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724 { |
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725 void delegate(FuncDecl) dg; |
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726 this(void delegate(FuncDecl funcDecl) dg) |
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727 { |
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728 this.dg = dg; |
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729 } |
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Anders Halager <halager@gmail.com>
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730 |
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731 override void visit(Decl[] decls) |
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732 { |
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733 foreach (decl; decls) |
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734 if (auto f = cast(FuncDecl)decl) |
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735 dg(f); |
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Anders Halager <halager@gmail.com>
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736 } |
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737 } |
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738 |
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739 private class SimpleSymbolTable |
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740 { |
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741 Value[char[]][] namedValues; |
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742 |
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743 void enterScope() |
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744 { |
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745 namedValues ~= cast(Value[char[]])["__dollar":null]; |
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746 } |
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747 |
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748 void leaveScope() |
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749 { |
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750 namedValues.length = namedValues.length - 1; |
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Anders Halager <halager@gmail.com>
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751 } |
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752 |
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753 Value put(Value val, char[] key) |
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754 { |
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755 namedValues[$ - 1][key] = val; |
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756 return val; |
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757 } |
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758 |
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759 Value find(char[] key) |
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760 { |
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761 foreach_reverse (map; namedValues) |
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762 if(auto val_ptr = key in map) |
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763 return *val_ptr; |
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764 return null; |
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765 } |
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766 |
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767 alias find opIndex; |
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768 alias put opIndexAssign; |
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769 } |
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770 |