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annotate tools/binding/llvmsample1.d @ 1638:0de4525a9ed6

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Apply workaround for #395 by klickverbot.
author Christian Kamm <kamm incasoftware de>
date Mon, 08 Mar 2010 20:06:08 +0100
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1ba61de8796b Committing LLVM binding for D as it currently exists in the SVN repository.
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1 // simple hello world sample of D LLVM
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2 module llvmsample1;
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3
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4 import llvm.llvm;
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5
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6 void main()
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7 {
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8 // create module
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9 auto m = new Module("sample1");
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10 scope(exit) m.dispose();
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11
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12 // declare string
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13 auto chello = ConstantArray.GetString("Hello World!\n", true);
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14 auto hello = m.addGlobal(chello.type, "hellostring");
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15 hello.initializer = chello;
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16 hello.linkage = Linkage.Internal;
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17 hello.globalConstant = true;
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18
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19 // declare printf
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20 auto printfType = FunctionType.Get(Type.Int32, [ PointerType.Get(Type.Int8) ], true);
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21 auto llprintf = m.addFunction(printfType, "printf");
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22
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23 // declare main
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24 auto mainType = FunctionType.Get(Type.Int32, null);
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25 auto llmain = m.addFunction(mainType, "main");
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26
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27 // create builder
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28 auto b = new Builder;
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29 scope(exit) b.dispose();
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30
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31 // create main body block
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32 auto bb = llmain.appendBasicBlock("entry");
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33 b.positionAtEnd(bb);
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34
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35 // call printf
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36 auto zero = ConstantInt.GetU(Type.Int32, 0);
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37 auto helloptr = b.buildGEP(hello, [ zero, zero ], "str");
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38 helloptr.dump();
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39 auto args = [ helloptr ];
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40 auto call = b.buildCall(llprintf, args, "");
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41
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42 // return 0
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43 b.buildRet(ConstantInt.GetS(Type.Int32, 0));
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44
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45 // write bitcode
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46 m.writeBitcodeToFile("sample1.bc");
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47 }