Extend attribute deduction to determine whether parameters using indirect pass mode might have their address captured. Similarly to the deduction of `readonly` attribute this information facilitates memcpy optimizations.
#[derive(TryFromU32)]
LLVMDIBuilderCreateGlobalVariableExpression
llvm::Type
llvm::Value
LLVMRustInsertPrivateGlobal
define_private_global
llvm::Bool