diff options
Diffstat (limited to 'compiler/rustc_codegen_llvm/src/back/lto.rs')
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/back/lto.rs | 65 |
1 files changed, 28 insertions, 37 deletions
diff --git a/compiler/rustc_codegen_llvm/src/back/lto.rs b/compiler/rustc_codegen_llvm/src/back/lto.rs index 6c0faf37a..d2e01708a 100644 --- a/compiler/rustc_codegen_llvm/src/back/lto.rs +++ b/compiler/rustc_codegen_llvm/src/back/lto.rs @@ -1,5 +1,7 @@ use crate::back::write::{self, save_temp_bitcode, DiagnosticHandlers}; -use crate::errors::DynamicLinkingWithLTO; +use crate::errors::{ + DynamicLinkingWithLTO, LlvmError, LtoBitcodeFromRlib, LtoDisallowed, LtoDylib, +}; use crate::llvm::{self, build_string}; use crate::{LlvmCodegenBackend, ModuleLlvm}; use object::read::archive::ArchiveFile; @@ -77,15 +79,12 @@ fn prepare_lto( // Make sure we actually can run LTO for crate_type in cgcx.crate_types.iter() { if !crate_type_allows_lto(*crate_type) { - let e = diag_handler.fatal( - "lto can only be run for executables, cdylibs and \ - static library outputs", - ); - return Err(e); + diag_handler.emit_err(LtoDisallowed); + return Err(FatalError); } else if *crate_type == CrateType::Dylib { if !cgcx.opts.unstable_opts.dylib_lto { - return Err(diag_handler - .fatal("lto cannot be used for `dylib` crate type without `-Zdylib-lto`")); + diag_handler.emit_err(LtoDylib); + return Err(FatalError); } } } @@ -127,7 +126,10 @@ fn prepare_lto( let module = SerializedModule::FromRlib(data.to_vec()); upstream_modules.push((module, CString::new(name).unwrap())); } - Err(msg) => return Err(diag_handler.fatal(&msg)), + Err(e) => { + diag_handler.emit_err(e); + return Err(FatalError); + } } } } @@ -140,7 +142,7 @@ fn prepare_lto( Ok((symbols_below_threshold, upstream_modules)) } -fn get_bitcode_slice_from_object_data(obj: &[u8]) -> Result<&[u8], String> { +fn get_bitcode_slice_from_object_data(obj: &[u8]) -> Result<&[u8], LtoBitcodeFromRlib> { let mut len = 0; let data = unsafe { llvm::LLVMRustGetBitcodeSliceFromObjectData(obj.as_ptr(), obj.len(), &mut len) }; @@ -155,8 +157,9 @@ fn get_bitcode_slice_from_object_data(obj: &[u8]) -> Result<&[u8], String> { Ok(bc) } else { assert!(len == 0); - let msg = llvm::last_error().unwrap_or_else(|| "unknown LLVM error".to_string()); - Err(format!("failed to get bitcode from object file for LTO ({})", msg)) + Err(LtoBitcodeFromRlib { + llvm_err: llvm::last_error().unwrap_or_else(|| "unknown LLVM error".to_string()), + }) } } @@ -328,10 +331,9 @@ fn fat_lto( }); info!("linking {:?}", name); let data = bc_decoded.data(); - linker.add(data).map_err(|()| { - let msg = format!("failed to load bitcode of module {:?}", name); - write::llvm_err(diag_handler, &msg) - })?; + linker + .add(data) + .map_err(|()| write::llvm_err(diag_handler, LlvmError::LoadBitcode { name }))?; serialized_bitcode.push(bc_decoded); } drop(linker); @@ -489,7 +491,7 @@ fn thin_lto( symbols_below_threshold.as_ptr(), symbols_below_threshold.len() as u32, ) - .ok_or_else(|| write::llvm_err(diag_handler, "failed to prepare thin LTO context"))?; + .ok_or_else(|| write::llvm_err(diag_handler, LlvmError::PrepareThinLtoContext))?; let data = ThinData(data); @@ -562,8 +564,7 @@ fn thin_lto( // session, overwriting the previous serialized data (if any). if let Some(path) = key_map_path { if let Err(err) = curr_key_map.save_to_file(&path) { - let msg = format!("Error while writing ThinLTO key data: {}", err); - return Err(write::llvm_err(diag_handler, &msg)); + return Err(write::llvm_err(diag_handler, LlvmError::WriteThinLtoKey { err })); } } @@ -689,8 +690,7 @@ pub unsafe fn optimize_thin_module( let module_name = &thin_module.shared.module_names[thin_module.idx]; let tm_factory_config = TargetMachineFactoryConfig::new(cgcx, module_name.to_str().unwrap()); - let tm = - (cgcx.tm_factory)(tm_factory_config).map_err(|e| write::llvm_err(&diag_handler, &e))?; + let tm = (cgcx.tm_factory)(tm_factory_config).map_err(|e| write::llvm_err(&diag_handler, e))?; // Right now the implementation we've got only works over serialized // modules, so we create a fresh new LLVM context and parse the module @@ -717,8 +717,7 @@ pub unsafe fn optimize_thin_module( let mut cu2 = ptr::null_mut(); llvm::LLVMRustThinLTOGetDICompileUnit(llmod, &mut cu1, &mut cu2); if !cu2.is_null() { - let msg = "multiple source DICompileUnits found"; - return Err(write::llvm_err(&diag_handler, msg)); + return Err(write::llvm_err(&diag_handler, LlvmError::MultipleSourceDiCompileUnit)); } // Up next comes the per-module local analyses that we do for Thin LTO. @@ -733,8 +732,7 @@ pub unsafe fn optimize_thin_module( let _timer = cgcx.prof.generic_activity_with_arg("LLVM_thin_lto_rename", thin_module.name()); if !llvm::LLVMRustPrepareThinLTORename(thin_module.shared.data.0, llmod, target) { - let msg = "failed to prepare thin LTO module"; - return Err(write::llvm_err(&diag_handler, msg)); + return Err(write::llvm_err(&diag_handler, LlvmError::PrepareThinLtoModule)); } save_temp_bitcode(cgcx, &module, "thin-lto-after-rename"); } @@ -744,8 +742,7 @@ pub unsafe fn optimize_thin_module( .prof .generic_activity_with_arg("LLVM_thin_lto_resolve_weak", thin_module.name()); if !llvm::LLVMRustPrepareThinLTOResolveWeak(thin_module.shared.data.0, llmod) { - let msg = "failed to prepare thin LTO module"; - return Err(write::llvm_err(&diag_handler, msg)); + return Err(write::llvm_err(&diag_handler, LlvmError::PrepareThinLtoModule)); } save_temp_bitcode(cgcx, &module, "thin-lto-after-resolve"); } @@ -755,8 +752,7 @@ pub unsafe fn optimize_thin_module( .prof .generic_activity_with_arg("LLVM_thin_lto_internalize", thin_module.name()); if !llvm::LLVMRustPrepareThinLTOInternalize(thin_module.shared.data.0, llmod) { - let msg = "failed to prepare thin LTO module"; - return Err(write::llvm_err(&diag_handler, msg)); + return Err(write::llvm_err(&diag_handler, LlvmError::PrepareThinLtoModule)); } save_temp_bitcode(cgcx, &module, "thin-lto-after-internalize"); } @@ -765,8 +761,7 @@ pub unsafe fn optimize_thin_module( let _timer = cgcx.prof.generic_activity_with_arg("LLVM_thin_lto_import", thin_module.name()); if !llvm::LLVMRustPrepareThinLTOImport(thin_module.shared.data.0, llmod, target) { - let msg = "failed to prepare thin LTO module"; - return Err(write::llvm_err(&diag_handler, msg)); + return Err(write::llvm_err(&diag_handler, LlvmError::PrepareThinLtoModule)); } save_temp_bitcode(cgcx, &module, "thin-lto-after-import"); } @@ -886,11 +881,7 @@ pub fn parse_module<'a>( diag_handler: &Handler, ) -> Result<&'a llvm::Module, FatalError> { unsafe { - llvm::LLVMRustParseBitcodeForLTO(cx, data.as_ptr(), data.len(), name.as_ptr()).ok_or_else( - || { - let msg = "failed to parse bitcode for LTO module"; - write::llvm_err(diag_handler, msg) - }, - ) + llvm::LLVMRustParseBitcodeForLTO(cx, data.as_ptr(), data.len(), name.as_ptr()) + .ok_or_else(|| write::llvm_err(diag_handler, LlvmError::ParseBitcode)) } } |