Auto merge of rust-lang#3069 - rust-lang:rustup-2023-09-21, r=RalfJung

Automatic sync from rustc
RalfJung · Sep 21, 2023 · d2db689 · d2db689
2 parents 70f3d3e + ed8fbcb
commit d2db689
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diff --git a/.gitmodules b/.gitmodules
@@ -33,7 +33,7 @@
 [submodule "src/llvm-project"]
 	path = src/llvm-project
 	url = https://github.com/rust-lang/llvm-project.git
-	branch = rustc/17.0-2023-07-29
+	branch = rustc/17.0-2023-09-19
 	shallow = true
 [submodule "src/doc/embedded-book"]
 	path = src/doc/embedded-book

diff --git a/Cargo.lock b/Cargo.lock
@@ -627,13 +627,13 @@ checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
 
 [[package]]
 name = "colored"
-version = "2.0.0"
+version = "2.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3616f750b84d8f0de8a58bda93e08e2a81ad3f523089b05f1dffecab48c6cbd"
+checksum = "2674ec482fbc38012cf31e6c42ba0177b431a0cb6f15fe40efa5aab1bda516f6"
 dependencies = [
- "atty",
+ "is-terminal",
  "lazy_static",
- "winapi",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -644,9 +644,9 @@ checksum = "55b672471b4e9f9e95499ea597ff64941a309b2cdbffcc46f2cc5e2d971fd335"
 
 [[package]]
 name = "compiler_builtins"
-version = "0.1.100"
+version = "0.1.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d6c0f24437059853f0fa64afc51f338f93647a3de4cf3358ba1bb4171a199775"
+checksum = "01a6d58e9c3408138099a396a98fd0d0e6cfb25d723594d2ae48b5004513fd5b"
 dependencies = [
  "cc",
  "rustc-std-workspace-core",
@@ -1169,19 +1169,6 @@ dependencies = [
  "termcolor",
 ]
 
-[[package]]
-name = "env_logger"
-version = "0.9.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a12e6657c4c97ebab115a42dcee77225f7f482cdd841cf7088c657a42e9e00e7"
-dependencies = [
- "atty",
- "humantime 2.1.0",
- "log",
- "regex",
- "termcolor",
-]
-
 [[package]]
 name = "env_logger"
 version = "0.10.0"
@@ -2142,9 +2129,9 @@ checksum = "db13adb97ab515a3691f56e4dbab09283d0b86cb45abd991d8634a9d6f501760"
 
 [[package]]
 name = "libc"
-version = "0.2.147"
+version = "0.2.148"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"
+checksum = "9cdc71e17332e86d2e1d38c1f99edcb6288ee11b815fb1a4b049eaa2114d369b"
 dependencies = [
  "rustc-std-workspace-core",
 ]
@@ -2454,7 +2441,7 @@ version = "0.1.0"
 dependencies = [
  "colored",
  "ctrlc",
- "env_logger 0.9.3",
+ "env_logger 0.10.0",
  "getrandom",
  "lazy_static",
  "libc",
@@ -5591,11 +5578,11 @@ dependencies = [
 
 [[package]]
 name = "tracing-tree"
-version = "0.2.3"
+version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f9742d8df709837409dbb22aa25dd7769c260406f20ff48a2320b80a4a6aed0"
+checksum = "92d6b63348fad3ae0439b8bebf8d38fb5bda0b115d7a8a7e6f165f12790c58c3"
 dependencies = [
- "atty",
+ "is-terminal",
  "nu-ansi-term",
  "tracing-core",
  "tracing-log",

diff --git a/RELEASES.md b/RELEASES.md
@@ -1,3 +1,13 @@
+Version 1.72.1 (2023-09-19)
+===========================
+
+- [Adjust codegen change to improve LLVM codegen](https://github.com/rust-lang/rust/pull/115236)
+- [rustdoc: Fix self ty params in objects with lifetimes](https://github.com/rust-lang/rust/pull/115276)
+- [Fix regression in compile times](https://github.com/rust-lang/rust/pull/114948)
+- Resolve some ICE regressions in the compiler:
+  - [#115215](https://github.com/rust-lang/rust/pull/115215)
+  - [#115559](https://github.com/rust-lang/rust/pull/115559)
+
 Version 1.72.0 (2023-08-24)
 ==========================
 
@@ -103,6 +113,16 @@ Compatibility Notes
   to a registry.
   [#12291](https://github.com/rust-lang/cargo/pull/12291)
 
+Version 1.71.1 (2023-08-03)
+===========================
+
+- [Fix CVE-2023-38497: Cargo did not respect the umask when extracting dependencies](https://github.com/rust-lang/cargo/security/advisories/GHSA-j3xp-wfr4-hx87)
+- [Fix bash completion for users of Rustup](https://github.com/rust-lang/rust/pull/113579)
+- [Do not show `suspicious_double_ref_op` lint when calling `borrow()`](https://github.com/rust-lang/rust/pull/112517)
+- [Fix ICE: substitute types before checking inlining compatibility](https://github.com/rust-lang/rust/pull/113802)
+- [Fix ICE: don't use `can_eq` in `derive(..)` suggestion for missing method](https://github.com/rust-lang/rust/pull/111516)
+- [Fix building Rust 1.71.0 from the source tarball](https://github.com/rust-lang/rust/issues/113678)
+
 Version 1.71.0 (2023-07-13)
 ==========================
 

diff --git a/compiler/rustc_ast_lowering/src/lib.rs b/compiler/rustc_ast_lowering/src/lib.rs
@@ -1431,12 +1431,6 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                         ),
                     ImplTraitContext::Universal => {
                         let span = t.span;
-                        self.create_def(
-                            self.current_hir_id_owner.def_id,
-                            *def_node_id,
-                            DefPathData::ImplTrait,
-                            span,
-                        );
 
                         // HACK: pprust breaks strings with newlines when the type
                         // gets too long. We don't want these to show up in compiler
@@ -1447,6 +1441,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                             span,
                         );
 
+                        self.create_def(
+                            self.current_hir_id_owner.def_id,
+                            *def_node_id,
+                            DefPathData::TypeNs(ident.name),
+                            span,
+                        );
                         let (param, bounds, path) = self.lower_universal_param_and_bounds(
                             *def_node_id,
                             span,

diff --git a/compiler/rustc_codegen_cranelift/src/constant.rs b/compiler/rustc_codegen_cranelift/src/constant.rs
@@ -2,7 +2,8 @@
 
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
-use rustc_middle::mir::interpret::{read_target_uint, AllocId, ConstValue, GlobalAlloc, Scalar};
+use rustc_middle::mir::interpret::{read_target_uint, AllocId, GlobalAlloc, Scalar};
+use rustc_middle::mir::ConstValue;
 
 use cranelift_module::*;
 
@@ -183,15 +184,11 @@ pub(crate) fn codegen_const_value<'tcx>(
                 .offset_i64(fx, i64::try_from(offset.bytes()).unwrap()),
             layout,
         ),
-        ConstValue::Slice { data, start, end } => {
+        ConstValue::Slice { data, meta } => {
             let alloc_id = fx.tcx.reserve_and_set_memory_alloc(data);
-            let ptr = pointer_for_allocation(fx, alloc_id)
-                .offset_i64(fx, i64::try_from(start).unwrap())
-                .get_addr(fx);
-            let len = fx
-                .bcx
-                .ins()
-                .iconst(fx.pointer_type, i64::try_from(end.checked_sub(start).unwrap()).unwrap());
+            let ptr = pointer_for_allocation(fx, alloc_id).get_addr(fx);
+            // FIXME: the `try_from` here can actually fail, e.g. for very long ZST slices.
+            let len = fx.bcx.ins().iconst(fx.pointer_type, i64::try_from(meta).unwrap());
             CValue::by_val_pair(ptr, len, layout)
         }
     }

diff --git a/compiler/rustc_codegen_ssa/src/common.rs b/compiler/rustc_codegen_ssa/src/common.rs
@@ -1,7 +1,7 @@
 #![allow(non_camel_case_types)]
 
 use rustc_hir::LangItem;
-use rustc_middle::mir::interpret::ConstValue;
+use rustc_middle::mir;
 use rustc_middle::ty::{self, layout::TyAndLayout, Ty, TyCtxt};
 use rustc_span::Span;
 
@@ -194,10 +194,10 @@ pub fn shift_mask_val<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
 pub fn asm_const_to_str<'tcx>(
     tcx: TyCtxt<'tcx>,
     sp: Span,
-    const_value: ConstValue<'tcx>,
+    const_value: mir::ConstValue<'tcx>,
     ty_and_layout: TyAndLayout<'tcx>,
 ) -> String {
-    let ConstValue::Scalar(scalar) = const_value else {
+    let mir::ConstValue::Scalar(scalar) = const_value else {
         span_bug!(sp, "expected Scalar for promoted asm const, but got {:#?}", const_value)
     };
     let value = scalar.assert_bits(ty_and_layout.size);

diff --git a/compiler/rustc_codegen_ssa/src/mir/constant.rs b/compiler/rustc_codegen_ssa/src/mir/constant.rs
@@ -2,7 +2,7 @@ use crate::errors;
 use crate::mir::operand::OperandRef;
 use crate::traits::*;
 use rustc_middle::mir;
-use rustc_middle::mir::interpret::{ConstValue, ErrorHandled};
+use rustc_middle::mir::interpret::ErrorHandled;
 use rustc_middle::ty::layout::HasTyCtxt;
 use rustc_middle::ty::{self, Ty};
 use rustc_target::abi::Abi;
@@ -20,7 +20,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
         OperandRef::from_const(bx, val, ty)
     }
 
-    pub fn eval_mir_constant(&self, constant: &mir::Constant<'tcx>) -> ConstValue<'tcx> {
+    pub fn eval_mir_constant(&self, constant: &mir::Constant<'tcx>) -> mir::ConstValue<'tcx> {
         self.monomorphize(constant.literal)
             .eval(self.cx.tcx(), ty::ParamEnv::reveal_all(), Some(constant.span))
             .expect("erroneous constant not captured by required_consts")

diff --git a/compiler/rustc_codegen_ssa/src/mir/operand.rs b/compiler/rustc_codegen_ssa/src/mir/operand.rs
@@ -6,8 +6,8 @@ use crate::glue;
 use crate::traits::*;
 use crate::MemFlags;
 
-use rustc_middle::mir;
-use rustc_middle::mir::interpret::{alloc_range, ConstValue, Pointer, Scalar};
+use rustc_middle::mir::interpret::{alloc_range, Pointer, Scalar};
+use rustc_middle::mir::{self, ConstValue};
 use rustc_middle::ty::layout::{LayoutOf, TyAndLayout};
 use rustc_middle::ty::Ty;
 use rustc_target::abi::{self, Abi, Align, Size};
@@ -86,7 +86,7 @@ impl<'a, 'tcx, V: CodegenObject> OperandRef<'tcx, V> {
 
     pub fn from_const<Bx: BuilderMethods<'a, 'tcx, Value = V>>(
         bx: &mut Bx,
-        val: ConstValue<'tcx>,
+        val: mir::ConstValue<'tcx>,
         ty: Ty<'tcx>,
     ) -> Self {
         let layout = bx.layout_of(ty);
@@ -100,23 +100,20 @@ impl<'a, 'tcx, V: CodegenObject> OperandRef<'tcx, V> {
                 OperandValue::Immediate(llval)
             }
             ConstValue::ZeroSized => return OperandRef::zero_sized(layout),
-            ConstValue::Slice { data, start, end } => {
+            ConstValue::Slice { data, meta } => {
                 let Abi::ScalarPair(a_scalar, _) = layout.abi else {
                     bug!("from_const: invalid ScalarPair layout: {:#?}", layout);
                 };
                 let a = Scalar::from_pointer(
-                    Pointer::new(
-                        bx.tcx().reserve_and_set_memory_alloc(data),
-                        Size::from_bytes(start),
-                    ),
+                    Pointer::new(bx.tcx().reserve_and_set_memory_alloc(data), Size::ZERO),
                     &bx.tcx(),
                 );
                 let a_llval = bx.scalar_to_backend(
                     a,
                     a_scalar,
                     bx.scalar_pair_element_backend_type(layout, 0, true),
                 );
-                let b_llval = bx.const_usize((end - start) as u64);
+                let b_llval = bx.const_usize(meta);
                 OperandValue::Pair(a_llval, b_llval)
             }
             ConstValue::Indirect { alloc_id, offset } => {

diff --git a/compiler/rustc_const_eval/src/const_eval/eval_queries.rs b/compiler/rustc_const_eval/src/const_eval/eval_queries.rs
@@ -4,9 +4,9 @@ use crate::errors::ConstEvalError;
 use either::{Left, Right};
 
 use rustc_hir::def::DefKind;
-use rustc_middle::mir;
 use rustc_middle::mir::interpret::{ErrorHandled, InterpErrorInfo};
 use rustc_middle::mir::pretty::write_allocation_bytes;
+use rustc_middle::mir::{self, ConstAlloc, ConstValue};
 use rustc_middle::traits::Reveal;
 use rustc_middle::ty::layout::LayoutOf;
 use rustc_middle::ty::print::with_no_trimmed_paths;
@@ -18,9 +18,8 @@ use super::{CanAccessStatics, CompileTimeEvalContext, CompileTimeInterpreter};
 use crate::errors;
 use crate::interpret::eval_nullary_intrinsic;
 use crate::interpret::{
-    intern_const_alloc_recursive, ConstAlloc, ConstValue, CtfeValidationMode, GlobalId, Immediate,
-    InternKind, InterpCx, InterpError, InterpResult, MPlaceTy, MemoryKind, OpTy, RefTracking,
-    StackPopCleanup,
+    intern_const_alloc_recursive, CtfeValidationMode, GlobalId, Immediate, InternKind, InterpCx,
+    InterpError, InterpResult, MPlaceTy, MemoryKind, OpTy, RefTracking, StackPopCleanup,
 };
 
 // Returns a pointer to where the result lives
@@ -152,19 +151,26 @@ pub(super) fn op_to_const<'tcx>(
             Immediate::Scalar(x) => ConstValue::Scalar(x),
             Immediate::ScalarPair(a, b) => {
                 debug!("ScalarPair(a: {:?}, b: {:?})", a, b);
-                // FIXME: assert that this has an appropriate type.
-                // Currently we actually get here for non-[u8] slices during valtree construction!
-                let msg = "`op_to_const` on an immediate scalar pair must only be used on slice references to actually allocated memory";
+                // This codepath solely exists for `valtree_to_const_value` to not need to generate
+                // a `ConstValue::Indirect` for wide references, so it is tightly restricted to just
+                // that case.
+                let pointee_ty = imm.layout.ty.builtin_deref(false).unwrap().ty; // `false` = no raw ptrs
+                debug_assert!(
+                    matches!(
+                        ecx.tcx.struct_tail_without_normalization(pointee_ty).kind(),
+                        ty::Str | ty::Slice(..),
+                    ),
+                    "`ConstValue::Slice` is for slice-tailed types only, but got {}",
+                    imm.layout.ty,
+                );
+                let msg = "`op_to_const` on an immediate scalar pair must only be used on slice references to the beginning of an actual allocation";
                 // We know `offset` is relative to the allocation, so we can use `into_parts`.
-                // We use `ConstValue::Slice` so that we don't have to generate an allocation for
-                // `ConstValue::Indirect` here.
                 let (alloc_id, offset) = a.to_pointer(ecx).expect(msg).into_parts();
                 let alloc_id = alloc_id.expect(msg);
                 let data = ecx.tcx.global_alloc(alloc_id).unwrap_memory();
-                let start = offset.bytes_usize();
-                let len = b.to_target_usize(ecx).expect(msg);
-                let len: usize = len.try_into().unwrap();
-                ConstValue::Slice { data, start, end: start + len }
+                assert!(offset == abi::Size::ZERO, "{}", msg);
+                let meta = b.to_target_usize(ecx).expect(msg);
+                ConstValue::Slice { data, meta }
             }
             Immediate::Uninit => bug!("`Uninit` is not a valid value for {}", op.layout.ty),
         },

diff --git a/compiler/rustc_const_eval/src/const_eval/mod.rs b/compiler/rustc_const_eval/src/const_eval/mod.rs
@@ -1,7 +1,7 @@
 // Not in interpret to make sure we do not use private implementation details
 
 use crate::errors::MaxNumNodesInConstErr;
-use crate::interpret::{intern_const_alloc_recursive, ConstValue, InternKind, InterpCx, Scalar};
+use crate::interpret::{intern_const_alloc_recursive, InternKind, InterpCx, Scalar};
 use rustc_middle::mir;
 use rustc_middle::mir::interpret::{EvalToValTreeResult, GlobalId};
 use rustc_middle::ty::{self, Ty, TyCtxt};
@@ -22,15 +22,15 @@ pub(crate) use valtrees::{const_to_valtree_inner, valtree_to_const_value};
 pub(crate) fn const_caller_location(
     tcx: TyCtxt<'_>,
     (file, line, col): (Symbol, u32, u32),
-) -> ConstValue<'_> {
+) -> mir::ConstValue<'_> {
     trace!("const_caller_location: {}:{}:{}", file, line, col);
     let mut ecx = mk_eval_cx(tcx, DUMMY_SP, ty::ParamEnv::reveal_all(), CanAccessStatics::No);
 
     let loc_place = ecx.alloc_caller_location(file, line, col);
     if intern_const_alloc_recursive(&mut ecx, InternKind::Constant, &loc_place).is_err() {
         bug!("intern_const_alloc_recursive should not error in this case")
     }
-    ConstValue::Scalar(Scalar::from_maybe_pointer(loc_place.ptr(), &tcx))
+    mir::ConstValue::Scalar(Scalar::from_maybe_pointer(loc_place.ptr(), &tcx))
 }
 
 // We forbid type-level constants that contain more than `VALTREE_MAX_NODES` nodes.
@@ -87,7 +87,7 @@ pub(crate) fn eval_to_valtree<'tcx>(
 #[instrument(skip(tcx), level = "debug")]
 pub(crate) fn try_destructure_mir_constant_for_diagnostics<'tcx>(
     tcx: TyCtxt<'tcx>,
-    val: ConstValue<'tcx>,
+    val: mir::ConstValue<'tcx>,
     ty: Ty<'tcx>,
 ) -> Option<mir::DestructuredConstant<'tcx>> {
     let param_env = ty::ParamEnv::reveal_all();