Rollup merge of #82256 - eddyb:time-passes-stderr, r=varkor

Print -Ztime-passes (and misc stats/logs) on stderr, not stdout.

I've tried not to change anything that looked similar to `rustc --print`, where people might use automation, and/or any "bulk" prints, such as dumping an entire Graphviz (`dot`) graph on stdout.

The reason I want `-Ztime-passes` to be on stderr like debug logging is I can get a complete (and correctly interleaved) view just by looking at stderr, which is merely a convenience when running `rustc`/Cargo directly, but even more important when it's nested in a build script, as Cargo will split the build script output into stdout (named `output`) and `stderr`.

1 files changed, 6 insertions, 6 deletions

diff --git a/compiler/rustc_passes/src/hir_stats.rs b/compiler/rustc_passes/src/hir_stats.rs
index e35ad10968d..8d5a5bdf6b7 100644
--- a/compiler/rustc_passes/src/hir_stats.rs
+++ b/compiler/rustc_passes/src/hir_stats.rs
@@ -66,13 +66,13 @@ impl<'k> StatCollector<'k> {
 
         let mut total_size = 0;
 
-        println!("\n{}\n", title);
+        eprintln!("\n{}\n", title);
 
-        println!("{:<18}{:>18}{:>14}{:>14}", "Name", "Accumulated Size", "Count", "Item Size");
-        println!("----------------------------------------------------------------");
+        eprintln!("{:<18}{:>18}{:>14}{:>14}", "Name", "Accumulated Size", "Count", "Item Size");
+        eprintln!("----------------------------------------------------------------");
 
         for (label, data) in stats {
-            println!(
+            eprintln!(
                 "{:<18}{:>18}{:>14}{:>14}",
                 label,
                 to_readable_str(data.count * data.size),
@@ -82,8 +82,8 @@ impl<'k> StatCollector<'k> {
 
             total_size += data.count * data.size;
         }
-        println!("----------------------------------------------------------------");
-        println!("{:<18}{:>18}\n", "Total", to_readable_str(total_size));
+        eprintln!("----------------------------------------------------------------");
+        eprintln!("{:<18}{:>18}\n", "Total", to_readable_str(total_size));
     }
 }