Merge branch 'master' of github.com:rust-lang/rust

Author: TheSamsa

Cargo.lock

@@ -2055,12 +2055,13 @@ dependencies = [
 
 [[package]]
 name = "measureme"
-version = "0.4.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd21b0e6e1af976b269ce062038fe5e1b9ca2f817ab7a3af09ec4210aebf0d30"
+checksum = "c420bbc064623934620b5ab2dc0cf96451b34163329e82f95e7fa1b7b99a6ac8"
 dependencies = [
  "byteorder",
  "memmap",
+ "parking_lot 0.9.0",
  "rustc-hash",
 ]
 
@@ -2072,9 +2073,9 @@ checksum = "2efc7bc57c883d4a4d6e3246905283d8dae951bb3bd32f49d6ef297f546e1c39"
 
 [[package]]
 name = "memmap"
-version = "0.6.2"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2ffa2c986de11a9df78620c01eeaaf27d94d3ff02bf81bfcca953102dd0c6ff"
+checksum = "6585fd95e7bb50d6cc31e20d4cf9afb4e2ba16c5846fc76793f11218da9c475b"
 dependencies = [
  "libc",
  "winapi 0.3.8",
@@ -2213,6 +2214,7 @@ dependencies = [
  "rand 0.7.0",
  "rustc-workspace-hack",
  "rustc_version",
+ "serde",
  "shell-escape",
  "vergen",
 ]

src/libarena/lib.rs

@@ -202,53 +202,18 @@ impl<T> TypedArena<T> {
     #[inline]
     pub fn alloc_from_iter<I: IntoIterator<Item = T>>(&self, iter: I) -> &mut [T] {
         assert!(mem::size_of::<T>() != 0);
-        let mut iter = iter.into_iter();
-        let size_hint = iter.size_hint();
-
-        match size_hint {
-            (min, Some(max)) if min == max => {
-                // We know the exact number of elements the iterator will produce here
-                let len = min;
-
-                if len == 0 {
-                    return &mut [];
-                }
-
-                self.ensure_capacity(len);
-
-                let slice = self.ptr.get();
-
-                unsafe {
-                    let mut ptr = self.ptr.get();
-                    for _ in 0..len {
-                        // Write into uninitialized memory.
-                        ptr::write(ptr, iter.next().unwrap());
-                        // Advance the pointer.
-                        ptr = ptr.offset(1);
-                        // Update the pointer per iteration so if `iter.next()` panics
-                        // we destroy the correct amount
-                        self.ptr.set(ptr);
-                    }
-                    slice::from_raw_parts_mut(slice, len)
-                }
-            }
-            _ => {
-                cold_path(move || -> &mut [T] {
-                    let mut vec: SmallVec<[_; 8]> = iter.collect();
-                    if vec.is_empty() {
-                        return &mut [];
-                    }
-                    // Move the content to the arena by copying it and then forgetting
-                    // the content of the SmallVec
-                    unsafe {
-                        let len = vec.len();
-                        let start_ptr = self.alloc_raw_slice(len);
-                        vec.as_ptr().copy_to_nonoverlapping(start_ptr, len);
-                        vec.set_len(0);
-                        slice::from_raw_parts_mut(start_ptr, len)
-                    }
-                })
-            }
+        let mut vec: SmallVec<[_; 8]> = iter.into_iter().collect();
+        if vec.is_empty() {
+            return &mut [];
+        }
+        // Move the content to the arena by copying it and then forgetting
+        // the content of the SmallVec
+        unsafe {
+            let len = vec.len();
+            let start_ptr = self.alloc_raw_slice(len);
+            vec.as_ptr().copy_to_nonoverlapping(start_ptr, len);
+            vec.set_len(0);
+            slice::from_raw_parts_mut(start_ptr, len)
         }
     }
 

src/librustc/Cargo.toml

@@ -37,6 +37,6 @@ byteorder = { version = "1.3" }
 chalk-engine = { version = "0.9.0", default-features=false }
 rustc_fs_util = { path = "../librustc_fs_util" }
 smallvec = { version = "1.0", features = ["union", "may_dangle"] }
-measureme = "0.4"
+measureme = "0.5"
 rustc_error_codes = { path = "../librustc_error_codes" }
 rustc_session = { path = "../librustc_session" }

src/librustc_codegen_ssa/Cargo.toml

@@ -13,7 +13,7 @@ test = false
 bitflags = "1.2.1"
 cc = "1.0.1"
 num_cpus = "1.0"
-memmap = "0.6"
+memmap = "0.7"
 log = "0.4.5"
 libc = "0.2.44"
 jobserver = "0.1.11"

src/librustc_data_structures/Cargo.toml

@@ -26,7 +26,7 @@ rustc-hash = "1.0.1"
 smallvec = { version = "1.0", features = ["union", "may_dangle"] }
 rustc_index = { path = "../librustc_index", package = "rustc_index" }
 bitflags = "1.2.1"
-measureme = "0.4"
+measureme = "0.5"
 
 [dependencies.parking_lot]
 version = "0.9"

src/librustc_data_structures/profiling.rs

@@ -7,7 +7,7 @@ use std::sync::Arc;
 use std::thread::ThreadId;
 use std::u32;
 
-use measureme::{StringId, TimestampKind};
+use measureme::{StringId};
 
 /// MmapSerializatioSink is faster on macOS and Linux
 /// but FileSerializationSink is faster on Windows
@@ -63,8 +63,8 @@ const EVENT_FILTERS_BY_NAME: &[(&str, EventFilter)] = &[
     ("incr-cache-load", EventFilter::INCR_CACHE_LOADS),
 ];
 
-fn thread_id_to_u64(tid: ThreadId) -> u64 {
-    unsafe { mem::transmute::<ThreadId, u64>(tid) }
+fn thread_id_to_u32(tid: ThreadId) -> u32 {
+    unsafe { mem::transmute::<ThreadId, u64>(tid) as u32 }
 }
 
 
@@ -149,11 +149,10 @@ impl SelfProfilerRef {
     /// Record a query in-memory cache hit.
     #[inline(always)]
     pub fn query_cache_hit(&self, query_name: impl QueryName) {
-        self.non_guard_query_event(
+        self.instant_query_event(
             |profiler| profiler.query_cache_hit_event_kind,
             query_name,
             EventFilter::QUERY_CACHE_HITS,
-            TimestampKind::Instant,
         );
     }
 
@@ -184,22 +183,20 @@ impl SelfProfilerRef {
     }
 
     #[inline(always)]
-    fn non_guard_query_event(
+    fn instant_query_event(
         &self,
         event_kind: fn(&SelfProfiler) -> StringId,
         query_name: impl QueryName,
         event_filter: EventFilter,
-        timestamp_kind: TimestampKind
     ) {
         drop(self.exec(event_filter, |profiler| {
             let event_id = SelfProfiler::get_query_name_string_id(query_name);
-            let thread_id = thread_id_to_u64(std::thread::current().id());
+            let thread_id = thread_id_to_u32(std::thread::current().id());
 
-            profiler.profiler.record_event(
+            profiler.profiler.record_instant_event(
                 event_kind(profiler),
                 event_id,
                 thread_id,
-                timestamp_kind,
             );
 
             TimingGuard::none()
@@ -306,7 +303,7 @@ impl<'a> TimingGuard<'a> {
         event_kind: StringId,
         event_id: StringId,
     ) -> TimingGuard<'a> {
-        let thread_id = thread_id_to_u64(std::thread::current().id());
+        let thread_id = thread_id_to_u32(std::thread::current().id());
         let raw_profiler = &profiler.profiler;
         let timing_guard = raw_profiler.start_recording_interval_event(event_kind,
                                                                        event_id,

src/librustc_metadata/Cargo.toml

@@ -12,7 +12,7 @@ doctest = false
 [dependencies]
 flate2 = "1.0"
 log = "0.4"
-memmap = "0.6"
+memmap = "0.7"
 smallvec = { version = "1.0", features = ["union", "may_dangle"] }
 rustc = { path = "../librustc" }
 rustc_data_structures = { path = "../librustc_data_structures" }