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Prevent two function with same mangled name but different types from being declared.

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Previously, LDC would crash in the backend due to the fact that the IR is typed in such cases (we recently had such an instance with Tango, where an extern( C ) function was declared once with int and once with size_t).
This commit is contained in:
David Nadlinger 2011-07-27 23:01:22 +02:00
parent 882e81ec1c
commit 15c5316e26
3 changed files with 22 additions and 29 deletions
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5
gen/functions.cpp
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@ -474,8 +474,11 @@ void DtoDeclareFunction(FuncDeclaration* fdecl)
// construct function
const llvm::FunctionType* functype = DtoFunctionType(fdecl);
llvm::Function* func = vafunc ? vafunc : gIR->module->getFunction(mangled_name);
if (!func)
if (!func) {
func = llvm::Function::Create(functype, DtoLinkage(fdecl), mangled_name, gIR->module);
} else if (func->getFunctionType() != functype) {
error(fdecl->loc, "Function type does not match previously declared function with the same mangled name: %s", fdecl->mangle());
}
if (Logger::enabled())
Logger::cout() << "func = " << *func << std::endl;