Merge commit 'ef07e8e60f994ec014d049a95591426fb92ebb79' into sync_cg_clif-2023-04-29

compiler/rustc_codegen_cranelift/src/driver/mod.rs

@@ -4,6 +4,7 @@
 //! [`codegen_fn`]: crate::base::codegen_fn
 //! [`codegen_static`]: crate::constant::codegen_static
 
+use rustc_data_structures::profiling::SelfProfilerRef;
 use rustc_middle::mir::mono::{Linkage as RLinkage, MonoItem, Visibility};
 
 use crate::prelude::*;
@@ -39,3 +40,31 @@ fn predefine_mono_items<'tcx>(
         }
     });
 }
+
+struct MeasuremeProfiler(SelfProfilerRef);
+
+struct TimingGuard {
+    profiler: std::mem::ManuallyDrop<SelfProfilerRef>,
+    inner: Option<rustc_data_structures::profiling::TimingGuard<'static>>,
+}
+
+impl Drop for TimingGuard {
+    fn drop(&mut self) {
+        self.inner.take();
+        unsafe {
+            std::mem::ManuallyDrop::drop(&mut self.profiler);
+        }
+    }
+}
+
+impl cranelift_codegen::timing::Profiler for MeasuremeProfiler {
+    fn start_pass(&self, pass: cranelift_codegen::timing::Pass) -> Box<dyn std::any::Any> {
+        let mut timing_guard =
+            TimingGuard { profiler: std::mem::ManuallyDrop::new(self.0.clone()), inner: None };
+        timing_guard.inner = Some(
+            unsafe { &*(&*timing_guard.profiler as &SelfProfilerRef as *const SelfProfilerRef) }
+                .generic_activity(pass.description()),
+        );
+        Box::new(timing_guard)
+    }
+}