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Use new functions appendToGlobalCtors() and appendToGlobalDtors.

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This simplifies the code in module.cpp a bit. But it is also the base to implement a pragma to place an arbitrary function in llvm.global_ctors and llvm.global_dtors.
This commit is contained in:
kai 2012-09-09 20:41:51 +02:00
parent e78ff5a131
commit d57eaa49ae
5 changed files with 144 additions and 91 deletions
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20
gen/module.cpp
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@ -645,23 +645,5 @@ void Module::genmoduleinfo()
// build the modulereference and ctor for registering it
LLFunction* mictor = build_module_reference_and_ctor(moduleInfoSymbol());
// register this ctor in the magic llvm.global_ctors appending array
LLFunctionType* magicfty = LLFunctionType::get(LLType::getVoidTy(gIR->context()), std::vector<LLType*>(), false);
std::vector<LLType*> magictypes;
magictypes.push_back(LLType::getInt32Ty(gIR->context()));
magictypes.push_back(getPtrToType(magicfty));
LLStructType* magicsty = LLStructType::get(gIR->context(), magictypes);
// make the constant element
std::vector<LLConstant*> magicconstants;
magicconstants.push_back(DtoConstUint(65535));
magicconstants.push_back(mictor);
LLConstant* magicinit = LLConstantStruct::get(magicsty, magicconstants);
// declare the appending array
llvm::ArrayType* appendArrTy = llvm::ArrayType::get(magicsty, 1);
std::vector<LLConstant*> appendInits(1, magicinit);
LLConstant* appendInit = LLConstantArray::get(appendArrTy, appendInits);
std::string appendName("llvm.global_ctors");
new llvm::GlobalVariable(*gIR->module, appendArrTy, true, llvm::GlobalValue::AppendingLinkage, appendInit, appendName);
AppendFunctionToLLVMGlobalCtorsDtors(mictor, 65535, true);
}