src/librustc_codegen_llvm/lib.rs - third_party/rust - Git at Google

 //! The Rust compiler.
 //!
 //! # Note
 //!
 //! This API is completely unstable and subject to change.

 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
 #![feature(bool_to_option)]
 #![feature(const_cstr_unchecked)]
 #![feature(crate_visibility_modifier)]
 #![feature(extern_types)]
 #![feature(in_band_lifetimes)]
 #![feature(nll)]
 #![feature(or_patterns)]
 #![feature(trusted_len)]
 #![recursion_limit = "256"]

 use back::write::{create_informational_target_machine, create_target_machine};

 pub use llvm_util::target_features;
 use rustc_ast::expand::allocator::AllocatorKind;
 use rustc_codegen_ssa::back::lto::{LtoModuleCodegen, SerializedModule, ThinModule};
 use rustc_codegen_ssa::back::write::{CodegenContext, FatLTOInput, ModuleConfig};
 use rustc_codegen_ssa::traits::*;
 use rustc_codegen_ssa::ModuleCodegen;
 use rustc_codegen_ssa::{CodegenResults, CompiledModule};
 use rustc_errors::{ErrorReported, FatalError, Handler};
 use rustc_middle::dep_graph::{DepGraph, WorkProduct};
 use rustc_middle::middle::cstore::{EncodedMetadata, MetadataLoaderDyn};
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_serialize::json;
 use rustc_session::config::{self, OptLevel, OutputFilenames, PrintRequest};
 use rustc_session::Session;
 use rustc_span::symbol::Symbol;

 use std::any::Any;
 use std::ffi::CStr;
 use std::fs;
 use std::sync::Arc;

 mod back {
     pub mod archive;
     pub mod lto;
     mod profiling;
     pub mod write;
 }

 mod abi;
 mod allocator;
 mod asm;
 mod attributes;
 mod base;
 mod builder;
 mod callee;
 mod common;
 mod consts;
 mod context;
 mod coverageinfo;
 mod debuginfo;
 mod declare;
 mod intrinsic;

 // The following is a work around that replaces `pub mod llvm;` and that fixes issue 53912.
 #[path = "llvm/mod.rs"]
 mod llvm_;
 pub mod llvm {
     pub use super::llvm_::*;
 }

 mod llvm_util;
 mod metadata;
 mod mono_item;
 mod type_;
 mod type_of;
 mod va_arg;
 mod value;

 #[derive(Clone)]
 pub struct LlvmCodegenBackend(());

 impl ExtraBackendMethods for LlvmCodegenBackend {
     fn new_metadata(&self, tcx: TyCtxt<'_>, mod_name: &str) -> ModuleLlvm {
         ModuleLlvm::new_metadata(tcx, mod_name)
     }

     fn write_compressed_metadata<'tcx>(
         &self,
         tcx: TyCtxt<'tcx>,
         metadata: &EncodedMetadata,
         llvm_module: &mut ModuleLlvm,
     ) {
         base::write_compressed_metadata(tcx, metadata, llvm_module)
     }
     fn codegen_allocator<'tcx>(
         &self,
         tcx: TyCtxt<'tcx>,
         mods: &mut ModuleLlvm,
         kind: AllocatorKind,
     ) {
         unsafe { allocator::codegen(tcx, mods, kind) }
     }
     fn compile_codegen_unit(
         &self,
         tcx: TyCtxt<'_>,
         cgu_name: Symbol,
     ) -> (ModuleCodegen<ModuleLlvm>, u64) {
         base::compile_codegen_unit(tcx, cgu_name)
     }
     fn target_machine_factory(
         &self,
         sess: &Session,
         optlvl: OptLevel,
     ) -> Arc<dyn Fn() -> Result<&'static mut llvm::TargetMachine, String> + Send + Sync> {
         back::write::target_machine_factory(sess, optlvl)
     }
     fn target_cpu<'b>(&self, sess: &'b Session) -> &'b str {
         llvm_util::target_cpu(sess)
     }
 }

 impl WriteBackendMethods for LlvmCodegenBackend {
     type Module = ModuleLlvm;
     type ModuleBuffer = back::lto::ModuleBuffer;
     type Context = llvm::Context;
     type TargetMachine = &'static mut llvm::TargetMachine;
     type ThinData = back::lto::ThinData;
     type ThinBuffer = back::lto::ThinBuffer;
     fn print_pass_timings(&self) {
         unsafe {
             llvm::LLVMRustPrintPassTimings();
         }
     }
     fn run_fat_lto(
         cgcx: &CodegenContext<Self>,
         modules: Vec<FatLTOInput<Self>>,
         cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>,
     ) -> Result<LtoModuleCodegen<Self>, FatalError> {
         back::lto::run_fat(cgcx, modules, cached_modules)
     }
     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> {
         back::lto::run_thin(cgcx, modules, cached_modules)
     }
     unsafe fn optimize(
         cgcx: &CodegenContext<Self>,
         diag_handler: &Handler,
         module: &ModuleCodegen<Self::Module>,
         config: &ModuleConfig,
     ) -> Result<(), FatalError> {
         back::write::optimize(cgcx, diag_handler, module, config)
     }
     unsafe fn optimize_thin(
         cgcx: &CodegenContext<Self>,
         thin: &mut ThinModule<Self>,
     ) -> Result<ModuleCodegen<Self::Module>, FatalError> {
         back::lto::optimize_thin_module(thin, cgcx)
     }
     unsafe fn codegen(
         cgcx: &CodegenContext<Self>,
         diag_handler: &Handler,
         module: ModuleCodegen<Self::Module>,
         config: &ModuleConfig,
     ) -> Result<CompiledModule, FatalError> {
         back::write::codegen(cgcx, diag_handler, module, config)
     }
     fn prepare_thin(module: ModuleCodegen<Self::Module>) -> (String, Self::ThinBuffer) {
         back::lto::prepare_thin(module)
     }
     fn serialize_module(module: ModuleCodegen<Self::Module>) -> (String, Self::ModuleBuffer) {
         (module.name, back::lto::ModuleBuffer::new(module.module_llvm.llmod()))
     }
     fn run_lto_pass_manager(
         cgcx: &CodegenContext<Self>,
         module: &ModuleCodegen<Self::Module>,
         config: &ModuleConfig,
         thin: bool,
     ) {
         back::lto::run_pass_manager(cgcx, module, config, thin)
     }
 }

 unsafe impl Send for LlvmCodegenBackend {} // Llvm is on a per-thread basis
 unsafe impl Sync for LlvmCodegenBackend {}

 impl LlvmCodegenBackend {
     pub fn new() -> Box<dyn CodegenBackend> {
         Box::new(LlvmCodegenBackend(()))
     }
 }

 impl CodegenBackend for LlvmCodegenBackend {
     fn init(&self, sess: &Session) {
         llvm_util::init(sess); // Make sure llvm is inited
     }

     fn print(&self, req: PrintRequest, sess: &Session) {
         match req {
             PrintRequest::RelocationModels => {
                 println!("Available relocation models:");
                 for name in
                     &["static", "pic", "dynamic-no-pic", "ropi", "rwpi", "ropi-rwpi", "default"]
                 {
                     println!("    {}", name);
                 }
                 println!();
             }
             PrintRequest::CodeModels => {
                 println!("Available code models:");
                 for name in &["tiny", "small", "kernel", "medium", "large"] {
                     println!("    {}", name);
                 }
                 println!();
             }
             PrintRequest::TlsModels => {
                 println!("Available TLS models:");
                 for name in &["global-dynamic", "local-dynamic", "initial-exec", "local-exec"] {
                     println!("    {}", name);
                 }
                 println!();
             }
             req => llvm_util::print(req, sess),
         }
     }

     fn print_passes(&self) {
         llvm_util::print_passes();
     }

     fn print_version(&self) {
         llvm_util::print_version();
     }

     fn target_features(&self, sess: &Session) -> Vec<Symbol> {
         target_features(sess)
     }

     fn metadata_loader(&self) -> Box<MetadataLoaderDyn> {
         Box::new(metadata::LlvmMetadataLoader)
     }

     fn provide(&self, providers: &mut ty::query::Providers) {
         attributes::provide(providers);
     }

     fn provide_extern(&self, providers: &mut ty::query::Providers) {
         attributes::provide_extern(providers);
     }

     fn codegen_crate<'tcx>(
         &self,
         tcx: TyCtxt<'tcx>,
         metadata: EncodedMetadata,
         need_metadata_module: bool,
     ) -> Box<dyn Any> {
         Box::new(rustc_codegen_ssa::base::codegen_crate(
             LlvmCodegenBackend(()),
             tcx,
             metadata,
             need_metadata_module,
         ))
     }

     fn join_codegen(
         &self,
         ongoing_codegen: Box<dyn Any>,
         sess: &Session,
         dep_graph: &DepGraph,
     ) -> Result<Box<dyn Any>, ErrorReported> {
         let (codegen_results, work_products) = ongoing_codegen
             .downcast::<rustc_codegen_ssa::back::write::OngoingCodegen<LlvmCodegenBackend>>()
             .expect("Expected LlvmCodegenBackend's OngoingCodegen, found Box<Any>")
             .join(sess);
         if sess.opts.debugging_opts.incremental_info {
             rustc_codegen_ssa::back::write::dump_incremental_data(&codegen_results);
         }

         sess.time("serialize_work_products", move || {
             rustc_incremental::save_work_product_index(sess, &dep_graph, work_products)
         });

         sess.compile_status()?;

         Ok(Box::new(codegen_results))
     }

     fn link(
         &self,
         sess: &Session,
         codegen_results: Box<dyn Any>,
         outputs: &OutputFilenames,
     ) -> Result<(), ErrorReported> {
         let codegen_results = codegen_results
             .downcast::<CodegenResults>()
             .expect("Expected CodegenResults, found Box<Any>");

         if sess.opts.debugging_opts.no_link {
             // FIXME: use a binary format to encode the `.rlink` file
             let rlink_data = json::encode(&codegen_results).map_err(|err| {
                 sess.fatal(&format!("failed to encode rlink: {}", err));
             })?;
             let rlink_file = outputs.with_extension(config::RLINK_EXT);
             fs::write(&rlink_file, rlink_data).map_err(|err| {
                 sess.fatal(&format!("failed to write file {}: {}", rlink_file.display(), err));
             })?;
             return Ok(());
         }

         // Run the linker on any artifacts that resulted from the LLVM run.
         // This should produce either a finished executable or library.
         sess.time("link_crate", || {
             use crate::back::archive::LlvmArchiveBuilder;
             use rustc_codegen_ssa::back::link::link_binary;

             let target_cpu = crate::llvm_util::target_cpu(sess);
             link_binary::<LlvmArchiveBuilder<'_>>(
                 sess,
                 &codegen_results,
                 outputs,
                 &codegen_results.crate_name.as_str(),
                 target_cpu,
             );
         });

         // Now that we won't touch anything in the incremental compilation directory
         // any more, we can finalize it (which involves renaming it)
         rustc_incremental::finalize_session_directory(sess, codegen_results.crate_hash);

         sess.time("llvm_dump_timing_file", || {
             if sess.opts.debugging_opts.llvm_time_trace {
                 llvm_util::time_trace_profiler_finish("llvm_timings.json");
             }
         });

         Ok(())
     }
 }

 pub struct ModuleLlvm {
     llcx: &'static mut llvm::Context,
     llmod_raw: *const llvm::Module,
     tm: &'static mut llvm::TargetMachine,
 }

 unsafe impl Send for ModuleLlvm {}
 unsafe impl Sync for ModuleLlvm {}

 impl ModuleLlvm {
     fn new(tcx: TyCtxt<'_>, mod_name: &str) -> Self {
         unsafe {
             let llcx = llvm::LLVMRustContextCreate(tcx.sess.fewer_names());
             let llmod_raw = context::create_module(tcx, llcx, mod_name) as *const _;
             ModuleLlvm { llmod_raw, llcx, tm: create_target_machine(tcx) }
         }
     }

     fn new_metadata(tcx: TyCtxt<'_>, mod_name: &str) -> Self {
         unsafe {
             let llcx = llvm::LLVMRustContextCreate(tcx.sess.fewer_names());
             let llmod_raw = context::create_module(tcx, llcx, mod_name) as *const _;
             ModuleLlvm { llmod_raw, llcx, tm: create_informational_target_machine(tcx.sess) }
         }
     }

     fn parse(
         cgcx: &CodegenContext<LlvmCodegenBackend>,
         name: &CStr,
         buffer: &[u8],
         handler: &Handler,
     ) -> Result<Self, FatalError> {
         unsafe {
             let llcx = llvm::LLVMRustContextCreate(cgcx.fewer_names);
             let llmod_raw = back::lto::parse_module(llcx, name, buffer, handler)?;
             let tm = match (cgcx.tm_factory.0)() {
                 Ok(m) => m,
                 Err(e) => {
                     handler.struct_err(&e).emit();
                     return Err(FatalError);
                 }
             };

             Ok(ModuleLlvm { llmod_raw, llcx, tm })
         }
     }

     fn llmod(&self) -> &llvm::Module {
         unsafe { &*self.llmod_raw }
     }
 }

 impl Drop for ModuleLlvm {
     fn drop(&mut self) {
         unsafe {
             llvm::LLVMContextDispose(&mut *(self.llcx as *mut _));
             llvm::LLVMRustDisposeTargetMachine(&mut *(self.tm as *mut _));
         }
     }
 }
	//! The Rust compiler.
	//!
	//! # Note
	//!
	//! This API is completely unstable and subject to change.

	#![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
	#![feature(bool_to_option)]
	#![feature(const_cstr_unchecked)]
	#![feature(crate_visibility_modifier)]
	#![feature(extern_types)]
	#![feature(in_band_lifetimes)]
	#![feature(nll)]
	#![feature(or_patterns)]
	#![feature(trusted_len)]
	#![recursion_limit = "256"]

	use back::write::{create_informational_target_machine, create_target_machine};

	pub use llvm_util::target_features;
	use rustc_ast::expand::allocator::AllocatorKind;
	use rustc_codegen_ssa::back::lto::{LtoModuleCodegen, SerializedModule, ThinModule};
	use rustc_codegen_ssa::back::write::{CodegenContext, FatLTOInput, ModuleConfig};
	use rustc_codegen_ssa::traits::*;
	use rustc_codegen_ssa::ModuleCodegen;
	use rustc_codegen_ssa::{CodegenResults, CompiledModule};
	use rustc_errors::{ErrorReported, FatalError, Handler};
	use rustc_middle::dep_graph::{DepGraph, WorkProduct};
	use rustc_middle::middle::cstore::{EncodedMetadata, MetadataLoaderDyn};
	use rustc_middle::ty::{self, TyCtxt};
	use rustc_serialize::json;
	use rustc_session::config::{self, OptLevel, OutputFilenames, PrintRequest};
	use rustc_session::Session;
	use rustc_span::symbol::Symbol;

	use std::any::Any;
	use std::ffi::CStr;
	use std::fs;
	use std::sync::Arc;

	mod back {
	pub mod archive;
	pub mod lto;
	mod profiling;
	pub mod write;
	}

	mod abi;
	mod allocator;
	mod asm;
	mod attributes;
	mod base;
	mod builder;
	mod callee;
	mod common;
	mod consts;
	mod context;
	mod coverageinfo;
	mod debuginfo;
	mod declare;
	mod intrinsic;

	// The following is a work around that replaces `pub mod llvm;` and that fixes issue 53912.
	#[path = "llvm/mod.rs"]
	mod llvm_;
	pub mod llvm {
	pub use super::llvm_::*;
	}

	mod llvm_util;
	mod metadata;
	mod mono_item;
	mod type_;
	mod type_of;
	mod va_arg;
	mod value;

	#[derive(Clone)]
	pub struct LlvmCodegenBackend(());

	impl ExtraBackendMethods for LlvmCodegenBackend {
	fn new_metadata(&self, tcx: TyCtxt<'_>, mod_name: &str) -> ModuleLlvm {
	ModuleLlvm::new_metadata(tcx, mod_name)
	}

	fn write_compressed_metadata<'tcx>(
	&self,
	tcx: TyCtxt<'tcx>,
	metadata: &EncodedMetadata,
	llvm_module: &mut ModuleLlvm,
	) {
	base::write_compressed_metadata(tcx, metadata, llvm_module)
	}
	fn codegen_allocator<'tcx>(
	&self,
	tcx: TyCtxt<'tcx>,
	mods: &mut ModuleLlvm,
	kind: AllocatorKind,
	) {
	unsafe { allocator::codegen(tcx, mods, kind) }
	}
	fn compile_codegen_unit(
	&self,
	tcx: TyCtxt<'_>,
	cgu_name: Symbol,
	) -> (ModuleCodegen<ModuleLlvm>, u64) {
	base::compile_codegen_unit(tcx, cgu_name)
	}
	fn target_machine_factory(
	&self,
	sess: &Session,
	optlvl: OptLevel,
	) -> Arc<dyn Fn() -> Result<&'static mut llvm::TargetMachine, String> + Send + Sync> {
	back::write::target_machine_factory(sess, optlvl)
	}
	fn target_cpu<'b>(&self, sess: &'b Session) -> &'b str {
	llvm_util::target_cpu(sess)
	}
	}

	impl WriteBackendMethods for LlvmCodegenBackend {
	type Module = ModuleLlvm;
	type ModuleBuffer = back::lto::ModuleBuffer;
	type Context = llvm::Context;
	type TargetMachine = &'static mut llvm::TargetMachine;
	type ThinData = back::lto::ThinData;
	type ThinBuffer = back::lto::ThinBuffer;
	fn print_pass_timings(&self) {
	unsafe {
	llvm::LLVMRustPrintPassTimings();
	}
	}
	fn run_fat_lto(
	cgcx: &CodegenContext<Self>,
	modules: Vec<FatLTOInput<Self>>,
	cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>,
	) -> Result<LtoModuleCodegen<Self>, FatalError> {
	back::lto::run_fat(cgcx, modules, cached_modules)
	}
	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> {
	back::lto::run_thin(cgcx, modules, cached_modules)
	}
	unsafe fn optimize(
	cgcx: &CodegenContext<Self>,
	diag_handler: &Handler,
	module: &ModuleCodegen<Self::Module>,
	config: &ModuleConfig,
	) -> Result<(), FatalError> {
	back::write::optimize(cgcx, diag_handler, module, config)
	}
	unsafe fn optimize_thin(
	cgcx: &CodegenContext<Self>,
	thin: &mut ThinModule<Self>,
	) -> Result<ModuleCodegen<Self::Module>, FatalError> {
	back::lto::optimize_thin_module(thin, cgcx)
	}
	unsafe fn codegen(
	cgcx: &CodegenContext<Self>,
	diag_handler: &Handler,
	module: ModuleCodegen<Self::Module>,
	config: &ModuleConfig,
	) -> Result<CompiledModule, FatalError> {
	back::write::codegen(cgcx, diag_handler, module, config)
	}
	fn prepare_thin(module: ModuleCodegen<Self::Module>) -> (String, Self::ThinBuffer) {
	back::lto::prepare_thin(module)
	}
	fn serialize_module(module: ModuleCodegen<Self::Module>) -> (String, Self::ModuleBuffer) {
	(module.name, back::lto::ModuleBuffer::new(module.module_llvm.llmod()))
	}
	fn run_lto_pass_manager(
	cgcx: &CodegenContext<Self>,
	module: &ModuleCodegen<Self::Module>,
	config: &ModuleConfig,
	thin: bool,
	) {
	back::lto::run_pass_manager(cgcx, module, config, thin)
	}
	}

	unsafe impl Send for LlvmCodegenBackend {} // Llvm is on a per-thread basis
	unsafe impl Sync for LlvmCodegenBackend {}

	impl LlvmCodegenBackend {
	pub fn new() -> Box<dyn CodegenBackend> {
	Box::new(LlvmCodegenBackend(()))
	}
	}

	impl CodegenBackend for LlvmCodegenBackend {
	fn init(&self, sess: &Session) {
	llvm_util::init(sess); // Make sure llvm is inited
	}

	fn print(&self, req: PrintRequest, sess: &Session) {
	match req {
	PrintRequest::RelocationModels => {
	println!("Available relocation models:");
	for name in
	&["static", "pic", "dynamic-no-pic", "ropi", "rwpi", "ropi-rwpi", "default"]
	{
	println!(" {}", name);
	}
	println!();
	}
	PrintRequest::CodeModels => {
	println!("Available code models:");
	for name in &["tiny", "small", "kernel", "medium", "large"] {
	println!(" {}", name);
	}
	println!();
	}
	PrintRequest::TlsModels => {
	println!("Available TLS models:");
	for name in &["global-dynamic", "local-dynamic", "initial-exec", "local-exec"] {
	println!(" {}", name);
	}
	println!();
	}
	req => llvm_util::print(req, sess),
	}
	}

	fn print_passes(&self) {
	llvm_util::print_passes();
	}

	fn print_version(&self) {
	llvm_util::print_version();
	}

	fn target_features(&self, sess: &Session) -> Vec<Symbol> {
	target_features(sess)
	}

	fn metadata_loader(&self) -> Box<MetadataLoaderDyn> {
	Box::new(metadata::LlvmMetadataLoader)
	}

	fn provide(&self, providers: &mut ty::query::Providers) {
	attributes::provide(providers);
	}

	fn provide_extern(&self, providers: &mut ty::query::Providers) {
	attributes::provide_extern(providers);
	}

	fn codegen_crate<'tcx>(
	&self,
	tcx: TyCtxt<'tcx>,
	metadata: EncodedMetadata,
	need_metadata_module: bool,
	) -> Box<dyn Any> {
	Box::new(rustc_codegen_ssa::base::codegen_crate(
	LlvmCodegenBackend(()),
	tcx,
	metadata,
	need_metadata_module,
	))
	}

	fn join_codegen(
	&self,
	ongoing_codegen: Box<dyn Any>,
	sess: &Session,
	dep_graph: &DepGraph,
	) -> Result<Box<dyn Any>, ErrorReported> {
	let (codegen_results, work_products) = ongoing_codegen
	.downcast::<rustc_codegen_ssa::back::write::OngoingCodegen<LlvmCodegenBackend>>()
	.expect("Expected LlvmCodegenBackend's OngoingCodegen, found Box<Any>")
	.join(sess);
	if sess.opts.debugging_opts.incremental_info {
	rustc_codegen_ssa::back::write::dump_incremental_data(&codegen_results);
	}

	sess.time("serialize_work_products", move \|\| {
	rustc_incremental::save_work_product_index(sess, &dep_graph, work_products)
	});

	sess.compile_status()?;

	Ok(Box::new(codegen_results))
	}

	fn link(
	&self,
	sess: &Session,
	codegen_results: Box<dyn Any>,
	outputs: &OutputFilenames,
	) -> Result<(), ErrorReported> {
	let codegen_results = codegen_results
	.downcast::<CodegenResults>()
	.expect("Expected CodegenResults, found Box<Any>");

	if sess.opts.debugging_opts.no_link {
	// FIXME: use a binary format to encode the `.rlink` file
	let rlink_data = json::encode(&codegen_results).map_err(\|err\| {
	sess.fatal(&format!("failed to encode rlink: {}", err));
	})?;
	let rlink_file = outputs.with_extension(config::RLINK_EXT);
	fs::write(&rlink_file, rlink_data).map_err(\|err\| {
	sess.fatal(&format!("failed to write file {}: {}", rlink_file.display(), err));
	})?;
	return Ok(());
	}

	// Run the linker on any artifacts that resulted from the LLVM run.
	// This should produce either a finished executable or library.
	sess.time("link_crate", \|\| {
	use crate::back::archive::LlvmArchiveBuilder;
	use rustc_codegen_ssa::back::link::link_binary;

	let target_cpu = crate::llvm_util::target_cpu(sess);
	link_binary::<LlvmArchiveBuilder<'_>>(
	sess,
	&codegen_results,
	outputs,
	&codegen_results.crate_name.as_str(),
	target_cpu,
	);
	});

	// Now that we won't touch anything in the incremental compilation directory
	// any more, we can finalize it (which involves renaming it)
	rustc_incremental::finalize_session_directory(sess, codegen_results.crate_hash);

	sess.time("llvm_dump_timing_file", \|\| {
	if sess.opts.debugging_opts.llvm_time_trace {
	llvm_util::time_trace_profiler_finish("llvm_timings.json");
	}
	});

	Ok(())
	}
	}

	pub struct ModuleLlvm {
	llcx: &'static mut llvm::Context,
	llmod_raw: *const llvm::Module,
	tm: &'static mut llvm::TargetMachine,
	}

	unsafe impl Send for ModuleLlvm {}
	unsafe impl Sync for ModuleLlvm {}

	impl ModuleLlvm {
	fn new(tcx: TyCtxt<'_>, mod_name: &str) -> Self {
	unsafe {
	let llcx = llvm::LLVMRustContextCreate(tcx.sess.fewer_names());
	let llmod_raw = context::create_module(tcx, llcx, mod_name) as *const _;
	ModuleLlvm { llmod_raw, llcx, tm: create_target_machine(tcx) }
	}
	}

	fn new_metadata(tcx: TyCtxt<'_>, mod_name: &str) -> Self {
	unsafe {
	let llcx = llvm::LLVMRustContextCreate(tcx.sess.fewer_names());
	let llmod_raw = context::create_module(tcx, llcx, mod_name) as *const _;
	ModuleLlvm { llmod_raw, llcx, tm: create_informational_target_machine(tcx.sess) }
	}
	}

	fn parse(
	cgcx: &CodegenContext<LlvmCodegenBackend>,
	name: &CStr,
	buffer: &[u8],
	handler: &Handler,
	) -> Result<Self, FatalError> {
	unsafe {
	let llcx = llvm::LLVMRustContextCreate(cgcx.fewer_names);
	let llmod_raw = back::lto::parse_module(llcx, name, buffer, handler)?;
	let tm = match (cgcx.tm_factory.0)() {
	Ok(m) => m,
	Err(e) => {
	handler.struct_err(&e).emit();
	return Err(FatalError);
	}
	};

	Ok(ModuleLlvm { llmod_raw, llcx, tm })
	}
	}

	fn llmod(&self) -> &llvm::Module {
	unsafe { &*self.llmod_raw }
	}
	}

	impl Drop for ModuleLlvm {
	fn drop(&mut self) {
	unsafe {
	llvm::LLVMContextDispose(&mut (self.llcx as mut _));
	llvm::LLVMRustDisposeTargetMachine(&mut (self.tm as mut _));
	}
	}
	}