Sync from rust f5559e3

Author: bjorn3

example/alloc_example.rs

@@ -1,4 +1,4 @@
-#![feature(start, core_intrinsics, alloc_error_handler)]
+#![feature(start, core_intrinsics)]
 #![no_std]
 
 extern crate alloc;
@@ -22,11 +22,6 @@ fn panic_handler(_: &core::panic::PanicInfo<'_>) -> ! {
     core::intrinsics::abort();
 }
 
-#[alloc_error_handler]
-fn alloc_error_handler(_: alloc::alloc::Layout) -> ! {
-    core::intrinsics::abort();
-}
-
 #[start]
 fn main(_argc: isize, _argv: *const *const u8) -> isize {
     let world: Box<&str> = Box::new("Hello World!\0");

src/abi/returning.rs

@@ -9,7 +9,7 @@ use smallvec::{smallvec, SmallVec};
 /// this adds an extra parameter pointing to where the return value needs to be stored.
 pub(super) fn codegen_return_param<'tcx>(
     fx: &mut FunctionCx<'_, '_, 'tcx>,
-    ssa_analyzed: &rustc_index::vec::IndexVec<Local, crate::analyze::SsaKind>,
+    ssa_analyzed: &rustc_index::IndexSlice<Local, crate::analyze::SsaKind>,
     block_params_iter: &mut impl Iterator<Item = Value>,
 ) -> CPlace<'tcx> {
     let (ret_place, ret_param): (_, SmallVec<[_; 2]>) = match fx.fn_abi.as_ref().unwrap().ret.mode {

src/allocator.rs

@@ -6,7 +6,6 @@ use crate::prelude::*;
 use rustc_ast::expand::allocator::{AllocatorKind, AllocatorTy, ALLOCATOR_METHODS};
 use rustc_codegen_ssa::base::allocator_kind_for_codegen;
 use rustc_session::config::OomStrategy;
-use rustc_span::symbol::sym;
 
 /// Returns whether an allocator shim was created
 pub(crate) fn codegen(
@@ -15,21 +14,14 @@ pub(crate) fn codegen(
     unwind_context: &mut UnwindContext,
 ) -> bool {
     let Some(kind) = allocator_kind_for_codegen(tcx) else { return false };
-    codegen_inner(
-        module,
-        unwind_context,
-        kind,
-        tcx.alloc_error_handler_kind(()).unwrap(),
-        tcx.sess.opts.unstable_opts.oom,
-    );
+    codegen_inner(module, unwind_context, kind, tcx.sess.opts.unstable_opts.oom);
     true
 }
 
 fn codegen_inner(
     module: &mut impl Module,
     unwind_context: &mut UnwindContext,
     kind: AllocatorKind,
-    alloc_error_handler_kind: AllocatorKind,
     oom_strategy: OomStrategy,
 ) {
     let usize_ty = module.target_config().pointer_type();
@@ -71,19 +63,6 @@ fn codegen_inner(
         );
     }
 
-    let sig = Signature {
-        call_conv: module.target_config().default_call_conv,
-        params: vec![AbiParam::new(usize_ty), AbiParam::new(usize_ty)],
-        returns: vec![],
-    };
-    crate::common::create_wrapper_function(
-        module,
-        unwind_context,
-        sig,
-        "__rust_alloc_error_handler",
-        &alloc_error_handler_kind.fn_name(sym::oom),
-    );
-
     let data_id = module.declare_data(OomStrategy::SYMBOL, Linkage::Export, false, false).unwrap();
     let mut data_ctx = DataContext::new();
     data_ctx.set_align(1);

src/analyze.rs

@@ -2,7 +2,7 @@
 
 use crate::prelude::*;
 
-use rustc_index::vec::IndexVec;
+use rustc_index::IndexVec;
 use rustc_middle::mir::StatementKind::*;
 use rustc_middle::ty::Ty;
 

src/base.rs

@@ -1,7 +1,7 @@
 //! Codegen of a single function
 
 use rustc_ast::InlineAsmOptions;
-use rustc_index::vec::IndexVec;
+use rustc_index::IndexVec;
 use rustc_middle::ty::adjustment::PointerCast;
 use rustc_middle::ty::layout::FnAbiOf;
 use rustc_middle::ty::print::with_no_trimmed_paths;
@@ -772,12 +772,15 @@ fn codegen_stmt<'tcx>(
                     let operand = operand.load_scalar(fx);
                     lval.write_cvalue(fx, CValue::by_val(operand, box_layout));
                 }
-                Rvalue::NullaryOp(null_op, ty) => {
+                Rvalue::NullaryOp(ref null_op, ty) => {
                     assert!(lval.layout().ty.is_sized(fx.tcx, ParamEnv::reveal_all()));
                     let layout = fx.layout_of(fx.monomorphize(ty));
                     let val = match null_op {
                         NullOp::SizeOf => layout.size.bytes(),
                         NullOp::AlignOf => layout.align.abi.bytes(),
+                        NullOp::OffsetOf(fields) => {
+                            layout.offset_of_subfield(fx, fields.iter().map(|f| f.index())).bytes()
+                        }
                     };
                     let val = CValue::by_val(
                         fx.bcx.ins().iconst(fx.pointer_type, i64::try_from(val).unwrap()),

src/common.rs

@@ -2,7 +2,7 @@ use cranelift_codegen::isa::TargetFrontendConfig;
 use gimli::write::FileId;
 
 use rustc_data_structures::sync::Lrc;
-use rustc_index::vec::IndexVec;
+use rustc_index::IndexVec;
 use rustc_middle::ty::layout::{
     FnAbiError, FnAbiOfHelpers, FnAbiRequest, LayoutError, LayoutOfHelpers,
 };

src/constant.rs

@@ -91,7 +91,7 @@ pub(crate) fn eval_mir_constant<'tcx>(
             ),
         },
         ConstantKind::Unevaluated(mir::UnevaluatedConst { def, .. }, _)
-            if fx.tcx.is_static(def.did) =>
+            if fx.tcx.is_static(def) =>
         {
             span_bug!(constant.span, "MIR constant refers to static");
         }

src/lib.rs

@@ -90,7 +90,7 @@ mod prelude {
 
     pub(crate) use rustc_data_structures::fx::FxHashMap;
 
-    pub(crate) use rustc_index::vec::Idx;
+    pub(crate) use rustc_index::Idx;
 
     pub(crate) use cranelift_codegen::ir::condcodes::{FloatCC, IntCC};
     pub(crate) use cranelift_codegen::ir::function::Function;