Rollup of 11 pull requests

compiler/rustc_codegen_ssa/src/mir/operand.rs

@@ -13,7 +13,7 @@ use rustc_session::config::OptLevel;
 use tracing::{debug, instrument};
 
 use super::place::{PlaceRef, PlaceValue};
-use super::rvalue::transmute_immediate;
+use super::rvalue::transmute_scalar;
 use super::{FunctionCx, LocalRef};
 use crate::common::IntPredicate;
 use crate::traits::*;
@@ -346,14 +346,16 @@ impl<'a, 'tcx, V: CodegenObject> OperandRef<'tcx, V> {
 
         let val = if field.is_zst() {
             OperandValue::ZeroSized
+        } else if let BackendRepr::SimdVector { .. } = self.layout.backend_repr {
+            // codegen_transmute_operand doesn't support SIMD, but since the previous
+            // check handled ZSTs, the only possible field access into something SIMD
+            // is to the `non_1zst_field` that's the same SIMD. (Other things, even
+            // just padding, would change the wrapper's representation type.)
+            assert_eq!(field.size, self.layout.size);
+            self.val
         } else if field.size == self.layout.size {
             assert_eq!(offset.bytes(), 0);
-            fx.codegen_transmute_operand(bx, *self, field).unwrap_or_else(|| {
-                bug!(
-                    "Expected `codegen_transmute_operand` to handle equal-size \
-                      field {i:?} projection from {self:?} to {field:?}"
-                )
-            })
+            fx.codegen_transmute_operand(bx, *self, field)
         } else {
             let (in_scalar, imm) = match (self.val, self.layout.backend_repr) {
                 // Extract a scalar component from a pair.
@@ -613,10 +615,8 @@ impl<'a, 'tcx, V: CodegenObject> OperandRef<'tcx, Result<V, abi::Scalar>> {
         };
 
         let mut update = |tgt: &mut Result<V, abi::Scalar>, src, from_scalar| {
-            let from_bty = bx.cx().type_from_scalar(from_scalar);
             let to_scalar = tgt.unwrap_err();
-            let to_bty = bx.cx().type_from_scalar(to_scalar);
-            let imm = transmute_immediate(bx, src, from_scalar, from_bty, to_scalar, to_bty);
+            let imm = transmute_scalar(bx, src, from_scalar, to_scalar);
             *tgt = Ok(imm);
         };
 

library/core/src/ops/arith.rs

@@ -627,7 +627,7 @@ macro_rules! rem_impl_float {
         /// ```
         #[stable(feature = "rust1", since = "1.0.0")]
         #[rustc_const_unstable(feature = "const_ops", issue = "90080")]
-        impl Rem for $t {
+        impl const Rem for $t {
             type Output = $t;
 
             #[inline]

library/std/src/sync/poison.rs

@@ -13,7 +13,7 @@
 //! depend on the primitive. See [#Overview] bellow.
 //!
 //! For the alternative implementations that do not employ poisoning,
-//! see `std::sys::nonpoisoning`.
+//! see `std::sync::nonpoisoning`.
 //!
 //! # Overview
 //!

src/bootstrap/src/core/build_steps/run.rs

@@ -5,6 +5,8 @@
 
 use std::path::PathBuf;
 
+use clap_complete::{Generator, shells};
+
 use crate::core::build_steps::dist::distdir;
 use crate::core::build_steps::test;
 use crate::core::build_steps::tool::{self, SourceType, Tool};
@@ -285,36 +287,35 @@ impl Step for GenerateWindowsSys {
     }
 }
 
+/// Return tuples of (shell, file containing completions).
+pub fn get_completion_paths(builder: &Builder<'_>) -> Vec<(&'static dyn Generator, PathBuf)> {
+    vec![
+        (&shells::Bash as &'static dyn Generator, builder.src.join("src/etc/completions/x.py.sh")),
+        (&shells::Zsh, builder.src.join("src/etc/completions/x.py.zsh")),
+        (&shells::Fish, builder.src.join("src/etc/completions/x.py.fish")),
+        (&shells::PowerShell, builder.src.join("src/etc/completions/x.py.ps1")),
+        (&shells::Bash, builder.src.join("src/etc/completions/x.sh")),
+        (&shells::Zsh, builder.src.join("src/etc/completions/x.zsh")),
+        (&shells::Fish, builder.src.join("src/etc/completions/x.fish")),
+        (&shells::PowerShell, builder.src.join("src/etc/completions/x.ps1")),
+    ]
+}
+
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct GenerateCompletions;
 
-macro_rules! generate_completions {
-    ( $( ( $shell:ident, $filename:expr ) ),* ) => {
-        $(
-            if let Some(comp) = get_completion($shell, &$filename) {
-                std::fs::write(&$filename, comp).expect(&format!("writing {} completion", stringify!($shell)));
-            }
-        )*
-    };
-}
-
 impl Step for GenerateCompletions {
     type Output = ();
 
     /// Uses `clap_complete` to generate shell completions.
     fn run(self, builder: &Builder<'_>) {
-        use clap_complete::shells::{Bash, Fish, PowerShell, Zsh};
-
-        generate_completions!(
-            (Bash, builder.src.join("src/etc/completions/x.py.sh")),
-            (Zsh, builder.src.join("src/etc/completions/x.py.zsh")),
-            (Fish, builder.src.join("src/etc/completions/x.py.fish")),
-            (PowerShell, builder.src.join("src/etc/completions/x.py.ps1")),
-            (Bash, builder.src.join("src/etc/completions/x.sh")),
-            (Zsh, builder.src.join("src/etc/completions/x.zsh")),
-            (Fish, builder.src.join("src/etc/completions/x.fish")),
-            (PowerShell, builder.src.join("src/etc/completions/x.ps1"))
-        );
+        for (shell, path) in get_completion_paths(builder) {
+            if let Some(comp) = get_completion(shell, &path) {
+                std::fs::write(&path, comp).unwrap_or_else(|e| {
+                    panic!("writing completion into {} failed: {e:?}", path.display())
+                });
+            }
+        }
     }
 
     fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {

src/bootstrap/src/core/build_steps/test.rs

@@ -8,12 +8,11 @@ use std::ffi::{OsStr, OsString};
 use std::path::{Path, PathBuf};
 use std::{env, fs, iter};
 
-use clap_complete::shells;
-
 use crate::core::build_steps::compile::{Std, run_cargo};
 use crate::core::build_steps::doc::DocumentationFormat;
 use crate::core::build_steps::gcc::{Gcc, add_cg_gcc_cargo_flags};
 use crate::core::build_steps::llvm::get_llvm_version;
+use crate::core::build_steps::run::get_completion_paths;
 use crate::core::build_steps::synthetic_targets::MirOptPanicAbortSyntheticTarget;
 use crate::core::build_steps::tool::{self, COMPILETEST_ALLOW_FEATURES, SourceType, Tool};
 use crate::core::build_steps::toolstate::ToolState;
@@ -1153,14 +1152,12 @@ HELP: to skip test's attempt to check tidiness, pass `--skip src/tools/tidy` to
         cmd.delay_failure().run(builder);
 
         builder.info("x.py completions check");
-        let [bash, zsh, fish, powershell] = ["x.py.sh", "x.py.zsh", "x.py.fish", "x.py.ps1"]
-            .map(|filename| builder.src.join("src/etc/completions").join(filename));
+        let completion_paths = get_completion_paths(builder);
         if builder.config.cmd.bless() {
             builder.ensure(crate::core::build_steps::run::GenerateCompletions);
-        } else if get_completion(shells::Bash, &bash).is_some()
-            || get_completion(shells::Fish, &fish).is_some()
-            || get_completion(shells::PowerShell, &powershell).is_some()
-            || crate::flags::get_completion(shells::Zsh, &zsh).is_some()
+        } else if completion_paths
+            .into_iter()
+            .any(|(shell, path)| get_completion(shell, &path).is_some())
         {
             eprintln!(
                 "x.py completions were changed; run `x.py run generate-completions` to update them"

src/bootstrap/src/core/config/flags.rs

@@ -6,6 +6,7 @@
 use std::path::{Path, PathBuf};
 
 use clap::{CommandFactory, Parser, ValueEnum};
+use clap_complete::Generator;
 #[cfg(feature = "tracing")]
 use tracing::instrument;
 
@@ -644,7 +645,7 @@ impl Subcommand {
 
 /// Returns the shell completion for a given shell, if the result differs from the current
 /// content of `path`. If `path` does not exist, always returns `Some`.
-pub fn get_completion<G: clap_complete::Generator>(shell: G, path: &Path) -> Option<String> {
+pub fn get_completion(shell: &dyn Generator, path: &Path) -> Option<String> {
     let mut cmd = Flags::command();
     let current = if !path.exists() {
         String::new()
@@ -662,7 +663,12 @@ pub fn get_completion<G: clap_complete::Generator>(shell: G, path: &Path) -> Opt
         .expect("file name should be UTF-8")
         .rsplit_once('.')
         .expect("file name should have an extension");
-    clap_complete::generate(shell, &mut cmd, bin_name, &mut buf);
+
+    // We sort of replicate `clap_complete::generate` here, because we want to call it with
+    // `&dyn Generator`, but that function requires `G: Generator` instead.
+    cmd.set_bin_name(bin_name);
+    cmd.build();
+    shell.generate(&cmd, &mut buf);
     if buf == current.as_bytes() {
         return None;
     }

src/etc/completions/x.fish

@@ -293,7 +293,7 @@ complete -c x -n "__fish_x_using_subcommand doc" -l skip-std-check-if-no-downloa
 complete -c x -n "__fish_x_using_subcommand doc" -s h -l help -d 'Print help (see more with \'--help\')'
 complete -c x -n "__fish_x_using_subcommand test" -l test-args -d 'extra arguments to be passed for the test tool being used (e.g. libtest, compiletest or rustdoc)' -r
 complete -c x -n "__fish_x_using_subcommand test" -l compiletest-rustc-args -d 'extra options to pass the compiler when running compiletest tests' -r
-complete -c x -n "__fish_x_using_subcommand test" -l extra-checks -d 'comma-separated list of other files types to check (accepts py, py:lint, py:fmt, shell)' -r
+complete -c x -n "__fish_x_using_subcommand test" -l extra-checks -d 'comma-separated list of other files types to check (accepts py, py:lint, py:fmt, shell, shell:lint, cpp, cpp:fmt, spellcheck, spellcheck:fix)' -r
 complete -c x -n "__fish_x_using_subcommand test" -l compare-mode -d 'mode describing what file the actual ui output will be compared to' -r
 complete -c x -n "__fish_x_using_subcommand test" -l pass -d 'force {check,build,run}-pass tests to this mode' -r
 complete -c x -n "__fish_x_using_subcommand test" -l run -d 'whether to execute run-* tests' -r

src/etc/completions/x.ps1

@@ -339,7 +339,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
         'x;test' {
             [CompletionResult]::new('--test-args', '--test-args', [CompletionResultType]::ParameterName, 'extra arguments to be passed for the test tool being used (e.g. libtest, compiletest or rustdoc)')
             [CompletionResult]::new('--compiletest-rustc-args', '--compiletest-rustc-args', [CompletionResultType]::ParameterName, 'extra options to pass the compiler when running compiletest tests')
-            [CompletionResult]::new('--extra-checks', '--extra-checks', [CompletionResultType]::ParameterName, 'comma-separated list of other files types to check (accepts py, py:lint, py:fmt, shell)')
+            [CompletionResult]::new('--extra-checks', '--extra-checks', [CompletionResultType]::ParameterName, 'comma-separated list of other files types to check (accepts py, py:lint, py:fmt, shell, shell:lint, cpp, cpp:fmt, spellcheck, spellcheck:fix)')
             [CompletionResult]::new('--compare-mode', '--compare-mode', [CompletionResultType]::ParameterName, 'mode describing what file the actual ui output will be compared to')
             [CompletionResult]::new('--pass', '--pass', [CompletionResultType]::ParameterName, 'force {check,build,run}-pass tests to this mode')
             [CompletionResult]::new('--run', '--run', [CompletionResultType]::ParameterName, 'whether to execute run-* tests')

src/etc/completions/x.zsh

@@ -338,7 +338,7 @@ _arguments "${_arguments_options[@]}" : \
 _arguments "${_arguments_options[@]}" : \
 '*--test-args=[extra arguments to be passed for the test tool being used (e.g. libtest, compiletest or rustdoc)]:ARGS:_default' \
 '*--compiletest-rustc-args=[extra options to pass the compiler when running compiletest tests]:ARGS:_default' \
-'--extra-checks=[comma-separated list of other files types to check (accepts py, py\:lint, py\:fmt, shell)]:EXTRA_CHECKS:_default' \
+'--extra-checks=[comma-separated list of other files types to check (accepts py, py\:lint, py\:fmt, shell, shell\:lint, cpp, cpp\:fmt, spellcheck, spellcheck\:fix)]:EXTRA_CHECKS:_default' \
 '--compare-mode=[mode describing what file the actual ui output will be compared to]:COMPARE MODE:_default' \
 '--pass=[force {check,build,run}-pass tests to this mode]:check | build | run:_default' \
 '--run=[whether to execute run-* tests]:auto | always | never:_default' \

src/tools/tidy/src/issues.txt

@@ -276,7 +276,6 @@ ui/auto-traits/issue-23080-2.rs
 ui/auto-traits/issue-23080.rs
 ui/auto-traits/issue-83857-ub.rs
 ui/auto-traits/issue-84075.rs
-ui/auxiliary/issue-16822.rs
 ui/bench/issue-32062.rs
 ui/binding/issue-40402-1.rs
 ui/binding/issue-40402-2.rs
@@ -1367,9 +1366,6 @@ ui/infinite/issue-41731-infinite-macro-println.rs
 ui/intrinsics/issue-28575.rs
 ui/intrinsics/issue-84297-reifying-copy.rs
 ui/invalid/issue-114435-layout-type-err.rs
-ui/issue-15924.rs
-ui/issue-16822.rs
-ui/issues-71798.rs
 ui/issues/auxiliary/issue-11224.rs
 ui/issues/auxiliary/issue-11508.rs
 ui/issues/auxiliary/issue-11529.rs

tests/codegen/intrinsics/transmute-x64.rs

@@ -9,17 +9,20 @@ use std::mem::transmute;
 // CHECK-LABEL: @check_sse_pair_to_avx(
 #[no_mangle]
 pub unsafe fn check_sse_pair_to_avx(x: (__m128i, __m128i)) -> __m256i {
+    // CHECK: start:
     // CHECK-NOT: alloca
-    // CHECK: %0 = load <4 x i64>, ptr %x, align 16
-    // CHECK: store <4 x i64> %0, ptr %_0, align 32
+    // CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 32 %_0, ptr align 16 %x, i64 32, i1 false)
+    // CHECK-NEXT: ret void
     transmute(x)
 }
 
 // CHECK-LABEL: @check_sse_pair_from_avx(
 #[no_mangle]
 pub unsafe fn check_sse_pair_from_avx(x: __m256i) -> (__m128i, __m128i) {
+    // CHECK: start:
     // CHECK-NOT: alloca
-    // CHECK: %0 = load <4 x i64>, ptr %x, align 32
-    // CHECK: store <4 x i64> %0, ptr %_0, align 16
+    // CHECK-NEXT: %[[TEMP:.+]] = load <4 x i64>, ptr %x, align 32
+    // CHECK-NEXT: store <4 x i64> %[[TEMP]], ptr %_0, align 16
+    // CHECK-NEXT: ret void
     transmute(x)
 }

tests/codegen/intrinsics/transmute.rs

@@ -29,28 +29,28 @@ pub struct Aggregate8(u8);
 // CHECK-LABEL: @check_bigger_size(
 #[no_mangle]
 pub unsafe fn check_bigger_size(x: u16) -> u32 {
-    // CHECK: call void @llvm.trap
+    // CHECK: call void @llvm.assume(i1 false)
     transmute_unchecked(x)
 }
 
 // CHECK-LABEL: @check_smaller_size(
 #[no_mangle]
 pub unsafe fn check_smaller_size(x: u32) -> u16 {
-    // CHECK: call void @llvm.trap
+    // CHECK: call void @llvm.assume(i1 false)
     transmute_unchecked(x)
 }
 
 // CHECK-LABEL: @check_smaller_array(
 #[no_mangle]
 pub unsafe fn check_smaller_array(x: [u32; 7]) -> [u32; 3] {
-    // CHECK: call void @llvm.trap
+    // CHECK: call void @llvm.assume(i1 false)
     transmute_unchecked(x)
 }
 
 // CHECK-LABEL: @check_bigger_array(
 #[no_mangle]
 pub unsafe fn check_bigger_array(x: [u32; 3]) -> [u32; 7] {
-    // CHECK: call void @llvm.trap
+    // CHECK: call void @llvm.assume(i1 false)
     transmute_unchecked(x)
 }
 
@@ -73,9 +73,9 @@ pub unsafe fn check_to_empty_array(x: [u32; 5]) -> [u32; 0] {
 #[no_mangle]
 #[custom_mir(dialect = "runtime", phase = "optimized")]
 pub unsafe fn check_from_empty_array(x: [u32; 0]) -> [u32; 5] {
-    // CHECK-NOT: trap
-    // CHECK: call void @llvm.trap
-    // CHECK-NOT: trap
+    // CHECK-NOT: call
+    // CHECK: call void @llvm.assume(i1 false)
+    // CHECK-NOT: call
     mir! {
         {
             RET = CastTransmute(x);

tests/codegen/simd-intrinsic/simd-intrinsic-transmute-array.rs

@@ -40,8 +40,7 @@ pub fn build_array_s(x: [f32; 4]) -> S<4> {
 // CHECK-LABEL: @build_array_transmute_s
 #[no_mangle]
 pub fn build_array_transmute_s(x: [f32; 4]) -> S<4> {
-    // CHECK: %[[VAL:.+]] = load <4 x float>, ptr %x, align [[ARRAY_ALIGN]]
-    // CHECK: store <4 x float> %[[VAL:.+]], ptr %_0, align [[VECTOR_ALIGN]]
+    // CHECK: call void @llvm.memcpy.{{.+}}({{.*}} align [[VECTOR_ALIGN]] {{.*}} align [[ARRAY_ALIGN]] {{.*}}, [[USIZE]] 16, i1 false)
     unsafe { std::mem::transmute(x) }
 }
 
@@ -55,7 +54,6 @@ pub fn build_array_t(x: [f32; 4]) -> T {
 // CHECK-LABEL: @build_array_transmute_t
 #[no_mangle]
 pub fn build_array_transmute_t(x: [f32; 4]) -> T {
-    // CHECK: %[[VAL:.+]] = load <4 x float>, ptr %x, align [[ARRAY_ALIGN]]
-    // CHECK: store <4 x float> %[[VAL:.+]], ptr %_0, align [[VECTOR_ALIGN]]
+    // CHECK: call void @llvm.memcpy.{{.+}}({{.*}} align [[VECTOR_ALIGN]] {{.*}} align [[ARRAY_ALIGN]] {{.*}}, [[USIZE]] 16, i1 false)
     unsafe { std::mem::transmute(x) }
 }

tests/codegen/transmute-scalar.rs

@@ -111,8 +111,11 @@ pub fn fake_bool_unsigned_to_bool(b: FakeBoolUnsigned) -> bool {
 struct S([i64; 1]);
 
 // CHECK-LABEL: define{{.*}}i64 @single_element_simd_to_scalar(<1 x i64> %b)
-// CHECK: bitcast <1 x i64> %b to i64
-// CHECK: ret i64
+// CHECK-NEXT: start:
+// CHECK-NEXT: %[[RET:.+]] = alloca [8 x i8]
+// CHECK-NEXT: store <1 x i64> %b, ptr %[[RET]]
+// CHECK-NEXT: %[[TEMP:.+]] = load i64, ptr %[[RET]]
+// CHECK-NEXT: ret i64 %[[TEMP]]
 #[no_mangle]
 #[cfg_attr(target_family = "wasm", target_feature(enable = "simd128"))]
 #[cfg_attr(target_arch = "arm", target_feature(enable = "neon"))]
@@ -124,8 +127,11 @@ pub extern "C" fn single_element_simd_to_scalar(b: S) -> i64 {
 }
 
 // CHECK-LABEL: define{{.*}}<1 x i64> @scalar_to_single_element_simd(i64 %b)
-// CHECK: bitcast i64 %b to <1 x i64>
-// CHECK: ret <1 x i64>
+// CHECK-NEXT: start:
+// CHECK-NEXT: %[[RET:.+]] = alloca [8 x i8]
+// CHECK-NEXT: store i64 %b, ptr %[[RET]]
+// CHECK-NEXT: %[[TEMP:.+]] = load <1 x i64>, ptr %[[RET]]
+// CHECK-NEXT: ret <1 x i64> %[[TEMP]]
 #[no_mangle]
 #[cfg_attr(target_family = "wasm", target_feature(enable = "simd128"))]
 #[cfg_attr(target_arch = "arm", target_feature(enable = "neon"))]