Sync from rust dd84b7d

Author: bjorn3

src/base.rs

@@ -828,12 +828,6 @@ fn codegen_stmt<'tcx>(
                         fx.bcx.ins().nop();
                     }
                 }
-                Rvalue::Len(place) => {
-                    let place = codegen_place(fx, place);
-                    let usize_layout = fx.layout_of(fx.tcx.types.usize);
-                    let len = codegen_array_len(fx, place);
-                    lval.write_cvalue(fx, CValue::by_val(len, usize_layout));
-                }
                 Rvalue::ShallowInitBox(ref operand, content_ty) => {
                     let content_ty = fx.monomorphize(content_ty);
                     let box_layout = fx.layout_of(Ty::new_box(fx.tcx, content_ty));

src/compiler_builtins.rs

@@ -3,7 +3,7 @@ use std::ffi::c_int;
 #[cfg(feature = "jit")]
 use std::ffi::c_void;
 
-// FIXME replace with core::ffi::c_size_t once stablized
+// FIXME replace with core::ffi::c_size_t once stabilized
 #[allow(non_camel_case_types)]
 #[cfg(feature = "jit")]
 type size_t = usize;

src/discriminant.rs

@@ -18,6 +18,7 @@ pub(crate) fn codegen_set_discriminant<'tcx>(
         return;
     }
     match layout.variants {
+        Variants::Empty => unreachable!("we already handled uninhabited types"),
         Variants::Single { index } => {
             assert_eq!(index, variant_index);
         }
@@ -85,6 +86,7 @@ pub(crate) fn codegen_get_discriminant<'tcx>(
     }
 
     let (tag_scalar, tag_field, tag_encoding) = match &layout.variants {
+        Variants::Empty => unreachable!("we already handled uninhabited types"),
         Variants::Single { index } => {
             let discr_val = layout
                 .ty

src/driver/jit.rs

@@ -294,7 +294,7 @@ fn dep_symbol_lookup_fn(
     // search path.
     for &cnum in crate_info.used_crates.iter().rev() {
         let src = &crate_info.used_crate_source[&cnum];
-        match data[cnum.as_usize() - 1] {
+        match data[cnum] {
             Linkage::NotLinked | Linkage::IncludedFromDylib => {}
             Linkage::Static => {
                 let name = crate_info.crate_name[&cnum];