1 files changed, 68 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_ssa/src/traits/write.rs b/compiler/rustc_codegen_ssa/src/traits/write.rs
new file mode 100644
index 000000000..e54ec34f1
--- /dev/null
+++ b/compiler/rustc_codegen_ssa/src/traits/write.rs
@@ -0,0 +1,68 @@
+use crate::back::lto::{LtoModuleCodegen, SerializedModule, ThinModule};
+use crate::back::write::{CodegenContext, FatLTOInput, ModuleConfig};
+use crate::{CompiledModule, ModuleCodegen};
+
+use rustc_errors::{FatalError, Handler};
+use rustc_middle::dep_graph::WorkProduct;
+
+pub trait WriteBackendMethods: 'static + Sized + Clone {
+    type Module: Send + Sync;
+    type TargetMachine;
+    type ModuleBuffer: ModuleBufferMethods;
+    type Context: ?Sized;
+    type ThinData: Send + Sync;
+    type ThinBuffer: ThinBufferMethods;
+
+    /// Merge all modules into main_module and returning it
+    fn run_link(
+        cgcx: &CodegenContext<Self>,
+        diag_handler: &Handler,
+        modules: Vec<ModuleCodegen<Self::Module>>,
+    ) -> Result<ModuleCodegen<Self::Module>, FatalError>;
+    /// Performs fat LTO by merging all modules into a single one and returning it
+    /// for further optimization.
+    fn run_fat_lto(
+        cgcx: &CodegenContext<Self>,
+        modules: Vec<FatLTOInput<Self>>,
+        cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>,
+    ) -> Result<LtoModuleCodegen<Self>, FatalError>;
+    /// Performs thin LTO by performing necessary global analysis and returning two
+    /// lists, one of the modules that need optimization and another for modules that
+    /// can simply be copied over from the incr. comp. cache.
+    fn run_thin_lto(
+        cgcx: &CodegenContext<Self>,
+        modules: Vec<(String, Self::ThinBuffer)>,
+        cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>,
+    ) -> Result<(Vec<LtoModuleCodegen<Self>>, Vec<WorkProduct>), FatalError>;
+    fn print_pass_timings(&self);
+    unsafe fn optimize(
+        cgcx: &CodegenContext<Self>,
+        diag_handler: &Handler,
+        module: &ModuleCodegen<Self::Module>,
+        config: &ModuleConfig,
+    ) -> Result<(), FatalError>;
+    fn optimize_fat(
+        cgcx: &CodegenContext<Self>,
+        llmod: &mut ModuleCodegen<Self::Module>,
+    ) -> Result<(), FatalError>;
+    unsafe fn optimize_thin(
+        cgcx: &CodegenContext<Self>,
+        thin: ThinModule<Self>,
+    ) -> Result<ModuleCodegen<Self::Module>, FatalError>;
+    unsafe fn codegen(
+        cgcx: &CodegenContext<Self>,
+        diag_handler: &Handler,
+        module: ModuleCodegen<Self::Module>,
+        config: &ModuleConfig,
+    ) -> Result<CompiledModule, FatalError>;
+    fn prepare_thin(module: ModuleCodegen<Self::Module>) -> (String, Self::ThinBuffer);
+    fn serialize_module(module: ModuleCodegen<Self::Module>) -> (String, Self::ModuleBuffer);
+}
+
+pub trait ThinBufferMethods: Send + Sync {
+    fn data(&self) -> &[u8];
+}
+
+pub trait ModuleBufferMethods: Send + Sync {
+    fn data(&self) -> &[u8];
+}