Sync from rust bc881e8

Author: bjorn3

src/allocator.rs

@@ -1,7 +1,8 @@
-use gccjit::{FunctionType, ToRValue};
+use gccjit::{FunctionType, GlobalKind, ToRValue};
 use rustc_ast::expand::allocator::{AllocatorKind, AllocatorTy, ALLOCATOR_METHODS};
 use rustc_middle::bug;
 use rustc_middle::ty::TyCtxt;
+use rustc_session::config::OomStrategy;
 use rustc_span::symbol::sym;
 
 use crate::GccContext;
@@ -113,4 +114,10 @@ pub(crate) unsafe fn codegen(tcx: TyCtxt<'_>, mods: &mut GccContext, _module_nam
     let _ret = context.new_call(None, callee, &args);
     //llvm::LLVMSetTailCall(ret, True);
     block.end_with_void_return(None);
+
+    let name = OomStrategy::SYMBOL.to_string();
+    let global = context.new_global(None, GlobalKind::Exported, i8, name);
+    let value = tcx.sess.opts.debugging_opts.oom.should_panic();
+    let value = context.new_rvalue_from_int(i8, value as i32);
+    global.global_set_initializer_rvalue(value);
 }

src/builder.rs

@@ -934,7 +934,7 @@ impl<'a, 'gcc, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'gcc, 'tcx> {
         let val_type = value.get_type();
         match (type_is_pointer(val_type), type_is_pointer(dest_ty)) {
             (false, true) => {
-                // NOTE: Projecting a field of a pointer type will attemp a cast from a signed char to
+                // NOTE: Projecting a field of a pointer type will attempt a cast from a signed char to
                 // a pointer, which is not supported by gccjit.
                 return self.cx.context.new_cast(None, self.inttoptr(value, val_type.make_pointer()), dest_ty);
             },
@@ -1251,8 +1251,8 @@ impl<'a, 'gcc, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'gcc, 'tcx> {
         self.cx
     }
 
-    fn apply_attrs_to_cleanup_callsite(&mut self, _llret: RValue<'gcc>) {
-        // TODO
+    fn do_not_inline(&mut self, _llret: RValue<'gcc>) {
+        unimplemented!();
     }
 
     fn set_span(&mut self, _span: Span) {}

src/common.rs

@@ -11,7 +11,7 @@ use rustc_codegen_ssa::traits::{
 use rustc_middle::mir::Mutability;
 use rustc_middle::ty::ScalarInt;
 use rustc_middle::ty::layout::{TyAndLayout, LayoutOf};
-use rustc_middle::mir::interpret::{Allocation, GlobalAlloc, Scalar};
+use rustc_middle::mir::interpret::{ConstAllocation, GlobalAlloc, Scalar};
 use rustc_span::Symbol;
 use rustc_target::abi::{self, HasDataLayout, Pointer, Size};
 
@@ -24,18 +24,6 @@ impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
         bytes_in_context(self, bytes)
     }
 
-    fn const_cstr(&self, symbol: Symbol, _null_terminated: bool) -> LValue<'gcc> {
-        // TODO(antoyo): handle null_terminated.
-        if let Some(&value) = self.const_cstr_cache.borrow().get(&symbol) {
-            return value;
-        }
-
-        let global = self.global_string(symbol.as_str());
-
-        self.const_cstr_cache.borrow_mut().insert(symbol, global);
-        global
-    }
-
     fn global_string(&self, string: &str) -> LValue<'gcc> {
         // TODO(antoyo): handle non-null-terminated strings.
         let string = self.context.new_string_literal(&*string);
@@ -134,8 +122,12 @@ impl<'gcc, 'tcx> ConstMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
     }
 
     fn const_str(&self, s: Symbol) -> (RValue<'gcc>, RValue<'gcc>) {
-        let len = s.as_str().len();
-        let cs = self.const_ptrcast(self.const_cstr(s, false).get_address(None),
+        let s_str = s.as_str();
+        let str_global = *self.const_str_cache.borrow_mut().entry(s).or_insert_with(|| {
+            self.global_string(s_str)
+        });
+        let len = s_str.len();
+        let cs = self.const_ptrcast(str_global.get_address(None),
             self.type_ptr_to(self.layout_of(self.tcx.types.str_).gcc_type(self, true)),
         );
         (cs, self.const_usize(len as u64))
@@ -190,6 +182,7 @@ impl<'gcc, 'tcx> ConstMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
                     match self.tcx.global_alloc(alloc_id) {
                         GlobalAlloc::Memory(alloc) => {
                             let init = const_alloc_to_gcc(self, alloc);
+                            let alloc = alloc.inner();
                             let value =
                                 match alloc.mutability {
                                     Mutability::Mut => self.static_addr_of_mut(init, alloc.align, None),
@@ -222,21 +215,21 @@ impl<'gcc, 'tcx> ConstMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
         }
     }
 
-    fn const_data_from_alloc(&self, alloc: &Allocation) -> Self::Value {
+    fn const_data_from_alloc(&self, alloc: ConstAllocation<'tcx>) -> Self::Value {
         const_alloc_to_gcc(self, alloc)
     }
 
-    fn from_const_alloc(&self, layout: TyAndLayout<'tcx>, alloc: &Allocation, offset: Size) -> PlaceRef<'tcx, RValue<'gcc>> {
-        assert_eq!(alloc.align, layout.align.abi);
+    fn from_const_alloc(&self, layout: TyAndLayout<'tcx>, alloc: ConstAllocation<'tcx>, offset: Size) -> PlaceRef<'tcx, RValue<'gcc>> {
+        assert_eq!(alloc.inner().align, layout.align.abi);
         let ty = self.type_ptr_to(layout.gcc_type(self, true));
         let value =
             if layout.size == Size::ZERO {
-                let value = self.const_usize(alloc.align.bytes());
+                let value = self.const_usize(alloc.inner().align.bytes());
                 self.context.new_cast(None, value, ty)
             }
             else {
                 let init = const_alloc_to_gcc(self, alloc);
-                let base_addr = self.static_addr_of(init, alloc.align, None);
+                let base_addr = self.static_addr_of(init, alloc.inner().align, None);
 
                 let array = self.const_bitcast(base_addr, self.type_i8p());
                 let value = self.context.new_array_access(None, array, self.const_usize(offset.bytes())).get_address(None);

src/consts.rs

@@ -7,7 +7,7 @@ use rustc_middle::middle::codegen_fn_attrs::{CodegenFnAttrFlags, CodegenFnAttrs}
 use rustc_middle::mir::mono::MonoItem;
 use rustc_middle::ty::{self, Instance, Ty};
 use rustc_middle::ty::layout::LayoutOf;
-use rustc_middle::mir::interpret::{self, Allocation, ErrorHandled, Scalar as InterpScalar, read_target_uint};
+use rustc_middle::mir::interpret::{self, ConstAllocation, ErrorHandled, Scalar as InterpScalar, read_target_uint};
 use rustc_span::Span;
 use rustc_span::def_id::DefId;
 use rustc_target::abi::{self, Align, HasDataLayout, Primitive, Size, WrappingRange};
@@ -293,7 +293,8 @@ impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
     }
 }
 
-pub fn const_alloc_to_gcc<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, alloc: &Allocation) -> RValue<'gcc> {
+pub fn const_alloc_to_gcc<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, alloc: ConstAllocation<'tcx>) -> RValue<'gcc> {
+    let alloc = alloc.inner();
     let mut llvals = Vec::with_capacity(alloc.relocations().len() + 1);
     let dl = cx.data_layout();
     let pointer_size = dl.pointer_size.bytes() as usize;
@@ -347,7 +348,7 @@ pub fn const_alloc_to_gcc<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, alloc: &Alloca
     cx.const_struct(&llvals, true)
 }
 
-pub fn codegen_static_initializer<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, def_id: DefId) -> Result<(RValue<'gcc>, &'tcx Allocation), ErrorHandled> {
+pub fn codegen_static_initializer<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, def_id: DefId) -> Result<(RValue<'gcc>, ConstAllocation<'tcx>), ErrorHandled> {
     let alloc = cx.tcx.eval_static_initializer(def_id)?;
     Ok((const_alloc_to_gcc(cx, alloc), alloc))
 }

src/context.rs

@@ -89,12 +89,13 @@ pub struct CodegenCx<'gcc, 'tcx> {
 
     /// Cache of emitted const globals (value -> global)
     pub const_globals: RefCell<FxHashMap<RValue<'gcc>, RValue<'gcc>>>,
+
     /// Map from the address of a global variable (rvalue) to the global variable itself (lvalue).
     /// TODO(antoyo): remove when the rustc API is fixed.
     pub global_lvalues: RefCell<FxHashMap<RValue<'gcc>, LValue<'gcc>>>,
 
     /// Cache of constant strings,
-    pub const_cstr_cache: RefCell<FxHashMap<Symbol, LValue<'gcc>>>,
+    pub const_str_cache: RefCell<FxHashMap<Symbol, LValue<'gcc>>>,
 
     /// Cache of globals.
     pub globals: RefCell<FxHashMap<String, RValue<'gcc>>>,
@@ -219,7 +220,7 @@ impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
             vtables: Default::default(),
             const_globals: Default::default(),
             global_lvalues: Default::default(),
-            const_cstr_cache: Default::default(),
+            const_str_cache: Default::default(),
             globals: Default::default(),
             scalar_types: Default::default(),
             types: Default::default(),

src/debuginfo.rs

@@ -31,7 +31,7 @@ impl<'a, 'gcc, 'tcx> DebugInfoBuilderMethods for Builder<'a, 'gcc, 'tcx> {
 }
 
 impl<'gcc, 'tcx> DebugInfoMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
-    fn create_vtable_metadata(&self, _ty: Ty<'tcx>, _trait_ref: Option<PolyExistentialTraitRef<'tcx>>, _vtable: Self::Value) {
+    fn create_vtable_debuginfo(&self, _ty: Ty<'tcx>, _trait_ref: Option<PolyExistentialTraitRef<'tcx>>, _vtable: Self::Value) {
         // TODO(antoyo)
     }
 

src/intrinsic/mod.rs

@@ -260,20 +260,20 @@ impl<'a, 'gcc, 'tcx> IntrinsicCallMethods<'tcx> for Builder<'a, 'gcc, 'tcx> {
                     use rustc_target::abi::Abi::*;
                     let tp_ty = substs.type_at(0);
                     let layout = self.layout_of(tp_ty).layout;
-                    let _use_integer_compare = match layout.abi {
+                    let _use_integer_compare = match layout.abi() {
                         Scalar(_) | ScalarPair(_, _) => true,
                         Uninhabited | Vector { .. } => false,
                         Aggregate { .. } => {
                             // For rusty ABIs, small aggregates are actually passed
                             // as `RegKind::Integer` (see `FnAbi::adjust_for_abi`),
                             // so we re-use that same threshold here.
-                            layout.size <= self.data_layout().pointer_size * 2
+                            layout.size() <= self.data_layout().pointer_size * 2
                         }
                     };
 
                     let a = args[0].immediate();
                     let b = args[1].immediate();
-                    if layout.size.bytes() == 0 {
+                    if layout.size().bytes() == 0 {
                         self.const_bool(true)
                     }
                     /*else if use_integer_compare {
@@ -289,7 +289,7 @@ impl<'a, 'gcc, 'tcx> IntrinsicCallMethods<'tcx> for Builder<'a, 'gcc, 'tcx> {
                         let void_ptr_type = self.context.new_type::<*const ()>();
                         let a_ptr = self.bitcast(a, void_ptr_type);
                         let b_ptr = self.bitcast(b, void_ptr_type);
-                        let n = self.context.new_cast(None, self.const_usize(layout.size.bytes()), self.sizet_type);
+                        let n = self.context.new_cast(None, self.const_usize(layout.size().bytes()), self.sizet_type);
                         let builtin = self.context.get_builtin_function("memcmp");
                         let cmp = self.context.new_call(None, builtin, &[a_ptr, b_ptr, n]);
                         self.icmp(IntPredicate::IntEQ, cmp, self.const_i32(0))

src/lib.rs

@@ -60,7 +60,7 @@ use rustc_codegen_ssa::back::lto::{LtoModuleCodegen, SerializedModule, ThinModul
 use rustc_codegen_ssa::target_features::supported_target_features;
 use rustc_codegen_ssa::traits::{CodegenBackend, ExtraBackendMethods, ModuleBufferMethods, ThinBufferMethods, WriteBackendMethods};
 use rustc_data_structures::fx::FxHashMap;
-use rustc_errors::{ErrorReported, Handler};
+use rustc_errors::{ErrorGuaranteed, Handler};
 use rustc_metadata::EncodedMetadata;
 use rustc_middle::dep_graph::{WorkProduct, WorkProductId};
 use rustc_middle::ty::TyCtxt;
@@ -108,7 +108,7 @@ impl CodegenBackend for GccCodegenBackend {
         Box::new(res)
     }
 
-    fn join_codegen(&self, ongoing_codegen: Box<dyn Any>, sess: &Session, _outputs: &OutputFilenames) -> Result<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>), ErrorReported> {
+    fn join_codegen(&self, ongoing_codegen: Box<dyn Any>, sess: &Session, _outputs: &OutputFilenames) -> Result<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>), ErrorGuaranteed> {
         let (codegen_results, work_products) = ongoing_codegen
             .downcast::<rustc_codegen_ssa::back::write::OngoingCodegen<GccCodegenBackend>>()
             .expect("Expected GccCodegenBackend's OngoingCodegen, found Box<Any>")
@@ -117,7 +117,7 @@ impl CodegenBackend for GccCodegenBackend {
         Ok((codegen_results, work_products))
     }
 
-    fn link(&self, sess: &Session, codegen_results: CodegenResults, outputs: &OutputFilenames) -> Result<(), ErrorReported> {
+    fn link(&self, sess: &Session, codegen_results: CodegenResults, outputs: &OutputFilenames) -> Result<(), ErrorGuaranteed> {
         use rustc_codegen_ssa::back::link::link_binary;
 
         link_binary::<crate::archive::ArArchiveBuilder<'_>>(
@@ -147,7 +147,7 @@ impl ExtraBackendMethods for GccCodegenBackend {
         base::compile_codegen_unit(tcx, cgu_name, *self.supports_128bit_integers.lock().expect("lock"))
     }
 
-    fn target_machine_factory(&self, _sess: &Session, _opt_level: OptLevel) -> TargetMachineFactoryFn<Self> {
+    fn target_machine_factory(&self, _sess: &Session, _opt_level: OptLevel, _features: &[String]) -> TargetMachineFactoryFn<Self> {
         // TODO(antoyo): set opt level.
         Arc::new(|_| {
             Ok(())

src/type_of.rs

@@ -56,8 +56,8 @@ pub fn uncached_gcc_type<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, layout: TyAndLa
             if let (&ty::Adt(def, _), &Variants::Single { index }) =
                 (layout.ty.kind(), &layout.variants)
             {
-                if def.is_enum() && !def.variants.is_empty() {
-                    write!(&mut name, "::{}", def.variants[index].name).unwrap();
+                if def.is_enum() && !def.variants().is_empty() {
+                    write!(&mut name, "::{}", def.variant(index).name).unwrap();
                 }
             }
             if let (&ty::Generator(_, _, _), &Variants::Single { index }) =