Remove #[macro_use] extern crate tracing from rustc_codegen_ssa.

Author: nnethercote

compiler/rustc_codegen_ssa/src/assert_module_sources.rs

@@ -37,6 +37,7 @@ use rustc_span::{Span, Symbol};
 use std::borrow::Cow;
 use std::fmt;
 use thin_vec::ThinVec;
+use tracing::debug;
 
 #[allow(missing_docs)]
 pub fn assert_module_sources(tcx: TyCtxt<'_>, set_reuse: &dyn Fn(&mut CguReuseTracker)) {

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -52,6 +52,7 @@ use std::ops::Deref;
 use std::path::{Path, PathBuf};
 use std::process::{ExitStatus, Output, Stdio};
 use std::{env, fmt, fs, io, mem, str};
+use tracing::{debug, info, warn};
 
 pub fn ensure_removed(dcx: &DiagCtxt, path: &Path) {
     if let Err(e) = fs::remove_file(path) {

compiler/rustc_codegen_ssa/src/back/linker.rs

@@ -22,6 +22,7 @@ use rustc_session::Session;
 use rustc_target::spec::{Cc, LinkOutputKind, LinkerFlavor, Lld};
 
 use cc::windows_registry;
+use tracing::{debug, warn};
 
 /// Disables non-English messages from localized linkers.
 /// Such messages may cause issues with text encoding on Windows (#35785)

compiler/rustc_codegen_ssa/src/back/rpath.rs

@@ -3,6 +3,7 @@ use rustc_data_structures::fx::FxHashSet;
 use rustc_fs_util::try_canonicalize;
 use std::ffi::OsString;
 use std::path::{Path, PathBuf};
+use tracing::debug;
 
 pub struct RPathConfig<'a> {
     pub libs: &'a [&'a Path],

compiler/rustc_codegen_ssa/src/back/symbol_export.rs

@@ -18,6 +18,7 @@ use rustc_middle::ty::{GenericArgKind, GenericArgsRef};
 use rustc_middle::util::Providers;
 use rustc_session::config::{CrateType, OomStrategy};
 use rustc_target::spec::{SanitizerSet, TlsModel};
+use tracing::debug;
 
 pub fn threshold(tcx: TyCtxt<'_>) -> SymbolExportLevel {
     crates_export_threshold(tcx.crate_types())

compiler/rustc_codegen_ssa/src/back/write.rs

@@ -49,6 +49,7 @@ use std::str;
 use std::sync::mpsc::{channel, Receiver, Sender};
 use std::sync::Arc;
 use std::thread;
+use tracing::debug;
 
 const PRE_LTO_BC_EXT: &str = "pre-lto.bc";
 

compiler/rustc_codegen_ssa/src/base.rs

@@ -45,6 +45,7 @@ use std::collections::BTreeSet;
 use std::time::{Duration, Instant};
 
 use itertools::Itertools;
+use tracing::{debug, info};
 
 pub fn bin_op_to_icmp_predicate(op: BinOp, signed: bool) -> IntPredicate {
     match op {

compiler/rustc_codegen_ssa/src/lib.rs

@@ -15,9 +15,6 @@
 //! The backend-agnostic functions of this crate use functions defined in various traits that
 //! have to be implemented by each backend.
 
-#[macro_use]
-extern crate tracing;
-
 use rustc_ast as ast;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_data_structures::fx::FxIndexMap;

compiler/rustc_codegen_ssa/src/meth.rs

@@ -5,6 +5,7 @@ use rustc_middle::ty::{self, GenericArgKind, Ty};
 use rustc_session::config::Lto;
 use rustc_symbol_mangling::typeid_for_trait_ref;
 use rustc_target::abi::call::FnAbi;
+use tracing::{debug, instrument};
 
 #[derive(Copy, Clone, Debug)]
 pub struct VirtualIndex(u64);

compiler/rustc_codegen_ssa/src/mir/analyze.rs

@@ -11,6 +11,7 @@ use rustc_middle::mir::visit::{MutatingUseContext, NonMutatingUseContext, PlaceC
 use rustc_middle::mir::{self, DefLocation, Location, TerminatorKind};
 use rustc_middle::ty::layout::{HasTyCtxt, LayoutOf};
 use rustc_middle::{bug, span_bug};
+use tracing::debug;
 
 pub fn non_ssa_locals<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
     fx: &FunctionCx<'a, 'tcx, Bx>,