Rollup of 16 pull requests

src/libcore/intrinsics.rs

@@ -1465,6 +1465,20 @@ extern "rust-intrinsic" {
     /// y < 0 or y >= N, where N is the width of T in bits.
     pub fn unchecked_shr<T>(x: T, y: T) -> T;
 
+    /// Performs rotate left.
+    /// The stabilized versions of this intrinsic are available on the integer
+    /// primitives via the `rotate_left` method. For example,
+    /// [`std::u32::rotate_left`](../../std/primitive.u32.html#method.rotate_left)
+    #[cfg(not(stage0))]
+    pub fn rotate_left<T>(x: T, y: T) -> T;
+
+    /// Performs rotate right.
+    /// The stabilized versions of this intrinsic are available on the integer
+    /// primitives via the `rotate_right` method. For example,
+    /// [`std::u32::rotate_right`](../../std/primitive.u32.html#method.rotate_right)
+    #[cfg(not(stage0))]
+    pub fn rotate_right<T>(x: T, y: T) -> T;
+
     /// Returns (a + b) mod 2<sup>N</sup>, where N is the width of T in bits.
     /// The stabilized versions of this intrinsic are available on the integer
     /// primitives via the `wrapping_add` method. For example,

src/libcore/num/mod.rs

@@ -2301,7 +2301,12 @@ assert_eq!(n.rotate_left(", $rot, "), m);
             #[rustc_const_unstable(feature = "const_int_rotate")]
             #[inline]
             pub const fn rotate_left(self, n: u32) -> Self {
-                (self << (n % $BITS)) | (self >> (($BITS - (n % $BITS)) % $BITS))
+                #[cfg(not(stage0))] {
+                    unsafe { intrinsics::rotate_left(self, n as $SelfT) }
+                }
+                #[cfg(stage0)] {
+                    (self << (n % $BITS)) | (self >> (($BITS - (n % $BITS)) % $BITS))
+                }
             }
         }
 
@@ -2326,7 +2331,12 @@ assert_eq!(n.rotate_right(", $rot, "), m);
             #[rustc_const_unstable(feature = "const_int_rotate")]
             #[inline]
             pub const fn rotate_right(self, n: u32) -> Self {
-                (self >> (n % $BITS)) | (self << (($BITS - (n % $BITS)) % $BITS))
+                #[cfg(not(stage0))] {
+                    unsafe { intrinsics::rotate_right(self, n as $SelfT) }
+                }
+                #[cfg(stage0)] {
+                    (self >> (n % $BITS)) | (self << (($BITS - (n % $BITS)) % $BITS))
+                }
             }
         }
 

src/libpanic_abort/lib.rs

@@ -97,7 +97,10 @@ pub unsafe extern fn __rust_start_panic(_payload: usize) -> u32 {
 pub mod personalities {
     #[no_mangle]
     #[cfg(not(any(
-        target_arch = "wasm32",
+        all(
+            target_arch = "wasm32",
+            not(target_os = "emscripten"),
+        ),
         all(
             target_os = "windows",
             target_env = "gnu",

src/librustc/ich/impls_mir.rs

@@ -37,68 +37,31 @@ impl_stable_hash_for!(struct mir::BasicBlockData<'tcx> { statements, terminator,
 impl_stable_hash_for!(struct mir::UnsafetyViolation { source_info, description, details, kind });
 impl_stable_hash_for!(struct mir::UnsafetyCheckResult { violations, unsafe_blocks });
 
-impl<'a> HashStable<StableHashingContext<'a>>
-for mir::BorrowKind {
-    #[inline]
-    fn hash_stable<W: StableHasherResult>(&self,
-                                          hcx: &mut StableHashingContext<'a>,
-                                          hasher: &mut StableHasher<W>) {
-        mem::discriminant(self).hash_stable(hcx, hasher);
-
-        match *self {
-            mir::BorrowKind::Shared |
-            mir::BorrowKind::Shallow |
-            mir::BorrowKind::Unique => {}
-            mir::BorrowKind::Mut { allow_two_phase_borrow } => {
-                allow_two_phase_borrow.hash_stable(hcx, hasher);
-            }
-        }
-    }
-}
-
-
-impl<'a> HashStable<StableHashingContext<'a>>
-for mir::UnsafetyViolationKind {
-    #[inline]
-    fn hash_stable<W: StableHasherResult>(&self,
-                                          hcx: &mut StableHashingContext<'a>,
-                                          hasher: &mut StableHasher<W>) {
-
-        mem::discriminant(self).hash_stable(hcx, hasher);
-
-        match *self {
-            mir::UnsafetyViolationKind::General => {}
-            mir::UnsafetyViolationKind::MinConstFn => {}
-            mir::UnsafetyViolationKind::ExternStatic(lint_node_id) |
-            mir::UnsafetyViolationKind::BorrowPacked(lint_node_id) => {
-                lint_node_id.hash_stable(hcx, hasher);
-            }
+impl_stable_hash_for!(enum mir::BorrowKind {
+    Shared,
+    Shallow,
+    Unique,
+    Mut { allow_two_phase_borrow },
+});
 
-        }
-    }
-}
+impl_stable_hash_for!(enum mir::UnsafetyViolationKind {
+    General,
+    MinConstFn,
+    ExternStatic(lint_node_id),
+    BorrowPacked(lint_node_id),
+});
 
 impl_stable_hash_for!(struct mir::Terminator<'tcx> {
     kind,
     source_info
 });
 
-impl<'a, 'gcx, T> HashStable<StableHashingContext<'a>> for mir::ClearCrossCrate<T>
-    where T: HashStable<StableHashingContext<'a>>
-{
-    #[inline]
-    fn hash_stable<W: StableHasherResult>(&self,
-                                          hcx: &mut StableHashingContext<'a>,
-                                          hasher: &mut StableHasher<W>) {
-        mem::discriminant(self).hash_stable(hcx, hasher);
-        match *self {
-            mir::ClearCrossCrate::Clear => {}
-            mir::ClearCrossCrate::Set(ref value) => {
-                value.hash_stable(hcx, hasher);
-            }
-        }
+impl_stable_hash_for!(
+    impl<T> for enum mir::ClearCrossCrate<T> [ mir::ClearCrossCrate ] {
+        Clear,
+        Set(value),
     }
-}
+);
 
 impl<'a> HashStable<StableHashingContext<'a>> for mir::Local {
     #[inline]