use super::write::CodegenContext;
use crate::traits::*;
use crate::ModuleCodegen;
use rustc_data_structures::memmap::Mmap;
use rustc_errors::FatalError;
use std::ffi::CString;
use std::sync::Arc;
pub struct ThinModule<B: WriteBackendMethods> {
pub shared: Arc<ThinShared<B>>,
pub idx: usize,
}
impl<B: WriteBackendMethods> ThinModule<B> {
pub fn name(&self) -> &str {
self.shared.module_names[self.idx].to_str().unwrap()
}
pub fn cost(&self) -> u64 {
self.data().len() as u64
}
pub fn data(&self) -> &[u8] {
let a = self.shared.thin_buffers.get(self.idx).map(|b| b.data());
a.unwrap_or_else(|| {
let len = self.shared.thin_buffers.len();
self.shared.serialized_modules[self.idx - len].data()
})
}
}
pub struct ThinShared<B: WriteBackendMethods> {
pub data: B::ThinData,
pub thin_buffers: Vec<B::ThinBuffer>,
pub serialized_modules: Vec<SerializedModule<B::ModuleBuffer>>,
pub module_names: Vec<CString>,
}
pub enum LtoModuleCodegen<B: WriteBackendMethods> {
Fat {
module: ModuleCodegen<B::Module>,
_serialized_bitcode: Vec<SerializedModule<B::ModuleBuffer>>,
},
Thin(ThinModule<B>),
}
impl<B: WriteBackendMethods> LtoModuleCodegen<B> {
pub fn name(&self) -> &str {
match *self {
LtoModuleCodegen::Fat { .. } => "everything",
LtoModuleCodegen::Thin(ref m) => m.name(),
}
}
pub unsafe fn optimize(
self,
cgcx: &CodegenContext<B>,
) -> Result<ModuleCodegen<B::Module>, FatalError> {
match self {
LtoModuleCodegen::Fat { mut module, .. } => {
B::optimize_fat(cgcx, &mut module)?;
Ok(module)
}
LtoModuleCodegen::Thin(thin) => B::optimize_thin(cgcx, thin),
}
}
pub fn cost(&self) -> u64 {
match *self {
LtoModuleCodegen::Fat { .. } => 0,
LtoModuleCodegen::Thin(ref m) => m.cost(),
}
}
}
pub enum SerializedModule<M: ModuleBufferMethods> {
Local(M),
FromRlib(Vec<u8>),
FromUncompressedFile(Mmap),
}
impl<M: ModuleBufferMethods> SerializedModule<M> {
pub fn data(&self) -> &[u8] {
match *self {
SerializedModule::Local(ref m) => m.data(),
SerializedModule::FromRlib(ref m) => m,
SerializedModule::FromUncompressedFile(ref m) => m,
}
}
}