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annotate tools/binding/llvmsample1.d @ 1650:40bd4a0d4870

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Update to work with LLVM 2.7. Removed use of dyn_cast, llvm no compiles without exceptions and rtti by default. We do need exceptions for the libconfig stuff, but rtti isn't necessary (anymore). Debug info needs to be rewritten, as in LLVM 2.7 the format has completely changed. To have something to look at while rewriting, the old code has been wrapped inside #ifndef DISABLE_DEBUG_INFO , this means that you have to define this to compile at the moment. Updated tango 0.99.9 patch to include updated EH runtime code, which is needed for LLVM 2.7 as well.
author Tomas Lindquist Olsen
date Wed, 19 May 2010 12:42:32 +0200
parents 1ba61de8796b
children
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1273
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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 }