Rollup merge of #61297 - eddyb:forsaken-stats, r=nagisa

Remove LLVM instruction stats and other (obsolete) codegen stats.

Both `-Z count_llvm_insns` and `-Z codegen-stats` are removed, as (AFAIK) they have been of little use in the last few years, especially after the transition to MIR->LLVM codegen.

Other than for the LLVM instruction counts, `-Z codegen-stats` has long been obsoleted anyway.

r? @nagisa cc @rust-lang/compiler

2 files changed, 1 insertions, 5 deletions

diff --git a/src/librustc_codegen_ssa/traits/backend.rs b/src/librustc_codegen_ssa/traits/backend.rs
index 530eba516a6..0466b47cf14 100644
--- a/src/librustc_codegen_ssa/traits/backend.rs
+++ b/src/librustc_codegen_ssa/traits/backend.rs
@@ -5,7 +5,6 @@ use super::write::WriteBackendMethods;
 use super::CodegenObject;
 use rustc::middle::allocator::AllocatorKind;
 use rustc::middle::cstore::EncodedMetadata;
-use rustc::mir::mono::Stats;
 use rustc::session::{Session, config};
 use rustc::ty::TyCtxt;
 use rustc_codegen_utils::codegen_backend::CodegenBackend;
@@ -49,7 +48,7 @@ pub trait ExtraBackendMethods: CodegenBackend + WriteBackendMethods + Sized + Se
         &self,
         tcx: TyCtxt<'a, 'tcx, 'tcx>,
         cgu_name: InternedString,
-    ) -> Stats;
+    );
     // If find_features is true this won't access `sess.crate_types` by assuming
     // that `is_pie_binary` is false. When we discover LLVM target features
     // `sess.crate_types` is uninitialized so we cannot access it.
diff --git a/src/librustc_codegen_ssa/traits/misc.rs b/src/librustc_codegen_ssa/traits/misc.rs
index 2797dd89f5b..5ea86df6e94 100644
--- a/src/librustc_codegen_ssa/traits/misc.rs
+++ b/src/librustc_codegen_ssa/traits/misc.rs
@@ -1,5 +1,4 @@
 use super::BackendTypes;
-use rustc::mir::mono::Stats;
 use rustc::session::Session;
 use rustc::ty::{self, Instance, Ty};
 use rustc::util::nodemap::FxHashMap;
@@ -17,8 +16,6 @@ pub trait MiscMethods<'tcx>: BackendTypes {
     fn eh_personality(&self) -> Self::Value;
     fn eh_unwind_resume(&self) -> Self::Value;
     fn sess(&self) -> &Session;
-    fn stats(&self) -> &RefCell<Stats>;
-    fn consume_stats(self) -> RefCell<Stats>;
     fn codegen_unit(&self) -> &Arc<CodegenUnit<'tcx>>;
     fn used_statics(&self) -> &RefCell<Vec<Self::Value>>;
     fn set_frame_pointer_elimination(&self, llfn: Self::Value);