errors: generate typed identifiers in each crate

Instead of loading the Fluent resources for every crate in
`rustc_error_messages`, each crate generates typed identifiers for its
own diagnostics and creates a static which are pulled together in the
`rustc_driver` crate and provided to the diagnostic emitter.

Signed-off-by: David Wood <david.wood@huawei.com>

compiler/rustc_codegen_llvm/locales/en-US.ftl

@@ -0,0 +1,89 @@
+codegen_llvm_unknown_ctarget_feature =
+    unknown feature specified for `-Ctarget-feature`: `{$feature}`
+    .note = it is still passed through to the codegen backend
+    .possible_feature = you might have meant: `{$rust_feature}`
+    .consider_filing_feature_request = consider filing a feature request
+
+codegen_llvm_unknown_ctarget_feature_prefix =
+    unknown feature specified for `-Ctarget-feature`: `{$feature}`
+    .note = features must begin with a `+` to enable or `-` to disable it
+
+codegen_llvm_error_creating_import_library =
+    Error creating import library for {$lib_name}: {$error}
+
+codegen_llvm_symbol_already_defined =
+    symbol `{$symbol_name}` is already defined
+
+codegen_llvm_invalid_minimum_alignment =
+    invalid minimum global alignment: {$err}
+
+codegen_llvm_sanitizer_memtag_requires_mte =
+    `-Zsanitizer=memtag` requires `-Ctarget-feature=+mte`
+
+codegen_llvm_error_writing_def_file =
+    Error writing .DEF file: {$error}
+
+codegen_llvm_error_calling_dlltool =
+    Error calling dlltool: {$error}
+
+codegen_llvm_dlltool_fail_import_library =
+    Dlltool could not create import library: {$stdout}\n{$stderr}
+
+codegen_llvm_target_feature_disable_or_enable =
+    the target features {$features} must all be either enabled or disabled together
+
+codegen_llvm_missing_features =
+    add the missing features in a `target_feature` attribute
+
+codegen_llvm_dynamic_linking_with_lto =
+    cannot prefer dynamic linking when performing LTO
+    .note = only 'staticlib', 'bin', and 'cdylib' outputs are supported with LTO
+
+codegen_llvm_parse_target_machine_config =
+    failed to parse target machine config to target machine: {$error}
+
+codegen_llvm_lto_disallowed = lto can only be run for executables, cdylibs and static library outputs
+
+codegen_llvm_lto_dylib = lto cannot be used for `dylib` crate type without `-Zdylib-lto`
+
+codegen_llvm_lto_bitcode_from_rlib = failed to get bitcode from object file for LTO ({$llvm_err})
+
+codegen_llvm_write_output = could not write output to {$path}
+codegen_llvm_write_output_with_llvm_err = could not write output to {$path}: {$llvm_err}
+
+codegen_llvm_target_machine = could not create LLVM TargetMachine for triple: {$triple}
+codegen_llvm_target_machine_with_llvm_err = could not create LLVM TargetMachine for triple: {$triple}: {$llvm_err}
+
+codegen_llvm_run_passes = failed to run LLVM passes
+codegen_llvm_run_passes_with_llvm_err = failed to run LLVM passes: {$llvm_err}
+
+codegen_llvm_serialize_module = failed to serialize module {$name}
+codegen_llvm_serialize_module_with_llvm_err = failed to serialize module {$name}: {$llvm_err}
+
+codegen_llvm_write_ir = failed to write LLVM IR to {$path}
+codegen_llvm_write_ir_with_llvm_err = failed to write LLVM IR to {$path}: {$llvm_err}
+
+codegen_llvm_prepare_thin_lto_context = failed to prepare thin LTO context
+codegen_llvm_prepare_thin_lto_context_with_llvm_err = failed to prepare thin LTO context: {$llvm_err}
+
+codegen_llvm_load_bitcode = failed to load bitcode of module "{$name}"
+codegen_llvm_load_bitcode_with_llvm_err = failed to load bitcode of module "{$name}": {$llvm_err}
+
+codegen_llvm_write_thinlto_key = error while writing ThinLTO key data: {$err}
+codegen_llvm_write_thinlto_key_with_llvm_err = error while writing ThinLTO key data: {$err}: {$llvm_err}
+
+codegen_llvm_multiple_source_dicompileunit = multiple source DICompileUnits found
+codegen_llvm_multiple_source_dicompileunit_with_llvm_err = multiple source DICompileUnits found: {$llvm_err}
+
+codegen_llvm_prepare_thin_lto_module = failed to prepare thin LTO module
+codegen_llvm_prepare_thin_lto_module_with_llvm_err = failed to prepare thin LTO module: {$llvm_err}
+
+codegen_llvm_parse_bitcode = failed to parse bitcode for LTO module
+codegen_llvm_parse_bitcode_with_llvm_err = failed to parse bitcode for LTO module: {$llvm_err}
+
+codegen_llvm_from_llvm_optimization_diag = {$filename}:{$line}:{$column} {$pass_name}: {$message}
+codegen_llvm_from_llvm_diag = {$message}
+
+codegen_llvm_write_bytecode = failed to write bytecode to {$path}: {$err}
+
+codegen_llvm_copy_bitcode = failed to copy bitcode to object file: {$err}

compiler/rustc_codegen_llvm/src/errors.rs

@@ -2,9 +2,10 @@ use std::borrow::Cow;
 use std::ffi::CString;
 use std::path::Path;
 
+use crate::fluent_generated as fluent;
 use rustc_data_structures::small_c_str::SmallCStr;
 use rustc_errors::{
-    fluent, DiagnosticBuilder, EmissionGuarantee, ErrorGuaranteed, Handler, IntoDiagnostic,
+    DiagnosticBuilder, EmissionGuarantee, ErrorGuaranteed, Handler, IntoDiagnostic,
 };
 use rustc_macros::{Diagnostic, Subdiagnostic};
 use rustc_span::Span;
@@ -27,9 +28,9 @@ pub(crate) struct UnknownCTargetFeature<'a> {
 
 #[derive(Subdiagnostic)]
 pub(crate) enum PossibleFeature<'a> {
-    #[help(possible_feature)]
+    #[help(codegen_llvm_possible_feature)]
     Some { rust_feature: &'a str },
-    #[help(consider_filing_feature_request)]
+    #[help(codegen_llvm_consider_filing_feature_request)]
     None,
 }
 

compiler/rustc_codegen_llvm/src/lib.rs

@@ -34,7 +34,8 @@ use rustc_codegen_ssa::traits::*;
 use rustc_codegen_ssa::ModuleCodegen;
 use rustc_codegen_ssa::{CodegenResults, CompiledModule};
 use rustc_data_structures::fx::FxHashMap;
-use rustc_errors::{ErrorGuaranteed, FatalError, Handler};
+use rustc_errors::{DiagnosticMessage, ErrorGuaranteed, FatalError, Handler, SubdiagnosticMessage};
+use rustc_macros::fluent_messages;
 use rustc_metadata::EncodedMetadata;
 use rustc_middle::dep_graph::{WorkProduct, WorkProductId};
 use rustc_middle::ty::query::Providers;
@@ -83,6 +84,8 @@ mod type_of;
 mod va_arg;
 mod value;
 
+fluent_messages! { "../locales/en-US.ftl" }
+
 #[derive(Clone)]
 pub struct LlvmCodegenBackend(());