private void InitGlobalVariable(AstVariableDecl decl, HashSet <AstVariableDecl> visited)
{
if (visited.Contains(decl))
{
return;
}
if (decl.Dependencies != null)
{
foreach (var dep in decl.Dependencies)
{
if (dep is AstVariableDecl v)
{
InitGlobalVariable(v, visited);
}
}
}
visited.Add(decl);
// Don't emit global variables that aren't even used
if (dontEmitUnusedDeclarations && !decl.IsUsed)
{
return;
}
// create vars
var type = CheezTypeToLLVMType(decl.Type);
var name = decl.Name.Name;
if (decl.TryGetDirective("linkname", out var linkname))
{
name = linkname.Arguments[0].Value as string;
}
var varPtr = module.AddGlobal(type, name);
varPtr.SetLinkage(LLVMLinkage.LLVMInternalLinkage);
if (decl.HasDirective("thread_local"))
{
varPtr.SetThreadLocal(true);
}
//varPtr.SetLinkage(LLVMLinkage.LLVMExternalLinkage);// TODO?
if (decl.HasDirective("extern"))
{
varPtr.SetLinkage(LLVMLinkage.LLVMExternalLinkage);
}
else
{
LLVMValueRef initializer = LLVM.ConstNull(CheezTypeToLLVMType(decl.Type));
varPtr.SetInitializer(initializer);
}
valueMap[decl] = varPtr;
// do initialization TODO: other patterns
if (decl.Initializer != null)
{
var x = GenerateExpression(decl.Initializer, true);
builder.CreateStore(x, varPtr);
}
}
