-use log::info;
use rustc_ast::ast::{AttrVec, BlockCheckMode};
use rustc_ast::mut_visit::{visit_clobber, MutVisitor, *};
use rustc_ast::ptr::P;
use std::sync::{Arc, Mutex, Once};
#[cfg(not(parallel_compiler))]
use std::{panic, thread};
+use tracing::info;
/// Adds `target_feature = "..."` cfgs for a variety of platform
/// specific features (SSE, NEON etc.).