Auto merge of #105248 - matthiaskrgr:rollup-d56k6bc, r=matthiaskrgr

Rollup of 4 pull requests

Successful merges:

 - #104856 (Don't suggest associated function call for associated const.)
 - #105123 (Fix passing MACOSX_DEPLOYMENT_TARGET to the linker)
 - #105142 (Make inline const block `ExprWithBlock`)
 - #105237 (Add regression test for #79450)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

compiler/rustc_ast/src/util/classify.rs

@@ -21,6 +21,7 @@ pub fn expr_requires_semi_to_be_stmt(e: &ast::Expr) -> bool {
             | ast::ExprKind::Loop(..)
             | ast::ExprKind::ForLoop(..)
             | ast::ExprKind::TryBlock(..)
+            | ast::ExprKind::ConstBlock(..)
     )
 }
 

compiler/rustc_hir_typeck/src/method/probe.rs

@@ -9,7 +9,6 @@ use rustc_data_structures::fx::FxHashSet;
 use rustc_errors::Applicability;
 use rustc_hir as hir;
 use rustc_hir::def::DefKind;
-use rustc_hir::def::Namespace;
 use rustc_infer::infer::canonical::OriginalQueryValues;
 use rustc_infer::infer::canonical::{Canonical, QueryResponse};
 use rustc_infer::infer::type_variable::{TypeVariableOrigin, TypeVariableOriginKind};
@@ -1876,6 +1875,15 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         self.tcx.erase_late_bound_regions(value)
     }
 
+    /// Determine if the given associated item type is relevant in the current context.
+    fn is_relevant_kind_for_mode(&self, kind: ty::AssocKind) -> bool {
+        match (self.mode, kind) {
+            (Mode::MethodCall, ty::AssocKind::Fn) => true,
+            (Mode::Path, ty::AssocKind::Const | ty::AssocKind::Fn) => true,
+            _ => false,
+        }
+    }
+
     /// Finds the method with the appropriate name (or return type, as the case may be). If
     /// `allow_similar_names` is set, find methods with close-matching names.
     // The length of the returned iterator is nearly always 0 or 1 and this
@@ -1888,7 +1896,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
                     .associated_items(def_id)
                     .in_definition_order()
                     .filter(|x| {
-                        if x.kind.namespace() != Namespace::ValueNS {
+                        if !self.is_relevant_kind_for_mode(x.kind) {
                             return false;
                         }
                         match lev_distance_with_substrings(name.as_str(), x.name.as_str(), max_dist)
@@ -1902,10 +1910,16 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
             } else {
                 self.fcx
                     .associated_value(def_id, name)
+                    .filter(|x| self.is_relevant_kind_for_mode(x.kind))
                     .map_or_else(SmallVec::new, |x| SmallVec::from_buf([x]))
             }
         } else {
-            self.tcx.associated_items(def_id).in_definition_order().copied().collect()
+            self.tcx
+                .associated_items(def_id)
+                .in_definition_order()
+                .filter(|x| self.is_relevant_kind_for_mode(x.kind))
+                .copied()
+                .collect()
         }
     }
 }

compiler/rustc_target/src/spec/aarch64_apple_darwin.rs

@@ -1,4 +1,4 @@
-use super::apple_base::{macos_link_env_remove, macos_llvm_target, opts, Arch};
+use super::apple_base::{macos_llvm_target, opts, Arch};
 use crate::spec::{FramePointer, SanitizerSet, Target, TargetOptions};
 
 pub fn target() -> Target {
@@ -10,8 +10,6 @@ pub fn target() -> Target {
     // FIXME: The leak sanitizer currently fails the tests, see #88132.
     base.supported_sanitizers = SanitizerSet::ADDRESS | SanitizerSet::CFI | SanitizerSet::THREAD;
 
-    base.link_env_remove.to_mut().extend(macos_link_env_remove());
-
     Target {
         // Clang automatically chooses a more specific target based on
         // MACOSX_DEPLOYMENT_TARGET.  To enable cross-language LTO to work

compiler/rustc_target/src/spec/apple/tests.rs

@@ -1,6 +1,6 @@
 use crate::spec::{
-    aarch64_apple_ios_sim, aarch64_apple_watchos_sim, x86_64_apple_ios, x86_64_apple_tvos,
-    x86_64_apple_watchos_sim,
+    aarch64_apple_darwin, aarch64_apple_ios_sim, aarch64_apple_watchos_sim, i686_apple_darwin,
+    x86_64_apple_darwin, x86_64_apple_ios, x86_64_apple_tvos, x86_64_apple_watchos_sim,
 };
 
 #[test]
@@ -18,3 +18,18 @@ fn simulator_targets_set_abi() {
         assert_eq!(target.abi, "sim")
     }
 }
+
+#[test]
+fn macos_link_environment_unmodified() {
+    let all_macos_targets = [
+        aarch64_apple_darwin::target(),
+        i686_apple_darwin::target(),
+        x86_64_apple_darwin::target(),
+    ];
+
+    for target in all_macos_targets {
+        // macOS targets should only remove information for cross-compiling, but never
+        // for the host.
+        assert_eq!(target.link_env_remove, crate::spec::cvs!["IPHONEOS_DEPLOYMENT_TARGET"]);
+    }
+}

compiler/rustc_target/src/spec/apple_base.rs

@@ -72,16 +72,6 @@ impl Arch {
             Arm64_sim => "apple-a12",
         }
     }
-
-    fn link_env_remove(self) -> StaticCow<[StaticCow<str>]> {
-        match self {
-            Armv7 | Armv7k | Armv7s | Arm64 | Arm64_32 | I386 | I686 | X86_64 | X86_64_sim
-            | Arm64_sim => {
-                cvs!["MACOSX_DEPLOYMENT_TARGET"]
-            }
-            X86_64_macabi | Arm64_macabi => cvs!["IPHONEOS_DEPLOYMENT_TARGET"],
-        }
-    }
 }
 
 fn pre_link_args(os: &'static str, arch: Arch, abi: &'static str) -> LinkArgs {
@@ -140,7 +130,7 @@ pub fn opts(os: &'static str, arch: Arch) -> TargetOptions {
         abi: abi.into(),
         os: os.into(),
         cpu: arch.target_cpu().into(),
-        link_env_remove: arch.link_env_remove(),
+        link_env_remove: link_env_remove(arch, os),
         vendor: "apple".into(),
         linker_flavor: LinkerFlavor::Darwin(Cc::Yes, Lld::No),
         // macOS has -dead_strip, which doesn't rely on function_sections
@@ -211,20 +201,38 @@ pub fn macos_llvm_target(arch: Arch) -> String {
     format!("{}-apple-macosx{}.{}.0", arch.target_name(), major, minor)
 }
 
-pub fn macos_link_env_remove() -> Vec<StaticCow<str>> {
-    let mut env_remove = Vec::with_capacity(2);
-    // Remove the `SDKROOT` environment variable if it's clearly set for the wrong platform, which
-    // may occur when we're linking a custom build script while targeting iOS for example.
-    if let Ok(sdkroot) = env::var("SDKROOT") {
-        if sdkroot.contains("iPhoneOS.platform") || sdkroot.contains("iPhoneSimulator.platform") {
-            env_remove.push("SDKROOT".into())
+fn link_env_remove(arch: Arch, os: &'static str) -> StaticCow<[StaticCow<str>]> {
+    // Apple platforms only officially support macOS as a host for any compilation.
+    //
+    // If building for macOS, we go ahead and remove any erronous environment state
+    // that's only applicable to cross-OS compilation. Always leave anything for the
+    // host OS alone though.
+    if os == "macos" {
+        let mut env_remove = Vec::with_capacity(2);
+        // Remove the `SDKROOT` environment variable if it's clearly set for the wrong platform, which
+        // may occur when we're linking a custom build script while targeting iOS for example.
+        if let Ok(sdkroot) = env::var("SDKROOT") {
+            if sdkroot.contains("iPhoneOS.platform") || sdkroot.contains("iPhoneSimulator.platform")
+            {
+                env_remove.push("SDKROOT".into())
+            }
+        }
+        // Additionally, `IPHONEOS_DEPLOYMENT_TARGET` must not be set when using the Xcode linker at
+        // "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld",
+        // although this is apparently ignored when using the linker at "/usr/bin/ld".
+        env_remove.push("IPHONEOS_DEPLOYMENT_TARGET".into());
+        env_remove.into()
+    } else {
+        // Otherwise if cross-compiling for a different OS/SDK, remove any part
+        // of the linking environment that's wrong and reversed.
+        match arch {
+            Armv7 | Armv7k | Armv7s | Arm64 | Arm64_32 | I386 | I686 | X86_64 | X86_64_sim
+            | Arm64_sim => {
+                cvs!["MACOSX_DEPLOYMENT_TARGET"]
+            }
+            X86_64_macabi | Arm64_macabi => cvs!["IPHONEOS_DEPLOYMENT_TARGET"],
         }
     }
-    // Additionally, `IPHONEOS_DEPLOYMENT_TARGET` must not be set when using the Xcode linker at
-    // "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld",
-    // although this is apparently ignored when using the linker at "/usr/bin/ld".
-    env_remove.push("IPHONEOS_DEPLOYMENT_TARGET".into());
-    env_remove
 }
 
 fn ios_deployment_target() -> (u32, u32) {

compiler/rustc_target/src/spec/i686_apple_darwin.rs

@@ -1,4 +1,4 @@
-use super::apple_base::{macos_link_env_remove, macos_llvm_target, opts, Arch};
+use super::apple_base::{macos_llvm_target, opts, Arch};
 use crate::spec::{Cc, FramePointer, LinkerFlavor, Lld, StackProbeType, Target, TargetOptions};
 
 pub fn target() -> Target {
@@ -7,7 +7,6 @@ pub fn target() -> Target {
     let mut base = opts("macos", arch);
     base.max_atomic_width = Some(64);
     base.add_pre_link_args(LinkerFlavor::Darwin(Cc::Yes, Lld::No), &["-m32"]);
-    base.link_env_remove.to_mut().extend(macos_link_env_remove());
     base.stack_probes = StackProbeType::X86;
     base.frame_pointer = FramePointer::Always;
 

compiler/rustc_target/src/spec/x86_64_apple_darwin.rs

@@ -1,4 +1,4 @@
-use super::apple_base::{macos_link_env_remove, macos_llvm_target, opts, Arch};
+use super::apple_base::{macos_llvm_target, opts, Arch};
 use crate::spec::{Cc, FramePointer, LinkerFlavor, Lld, SanitizerSet};
 use crate::spec::{StackProbeType, Target, TargetOptions};
 
@@ -8,7 +8,6 @@ pub fn target() -> Target {
     base.max_atomic_width = Some(128); // core2 supports cmpxchg16b
     base.frame_pointer = FramePointer::Always;
     base.add_pre_link_args(LinkerFlavor::Darwin(Cc::Yes, Lld::No), &["-m64"]);
-    base.link_env_remove.to_mut().extend(macos_link_env_remove());
     base.stack_probes = StackProbeType::X86;
     base.supported_sanitizers =
         SanitizerSet::ADDRESS | SanitizerSet::CFI | SanitizerSet::LEAK | SanitizerSet::THREAD;

src/test/run-make/macos-deployment-target/Makefile

@@ -0,0 +1,21 @@
+# only-macos
+#
+# Check that a set deployment target actually makes it to the linker.
+# This is important since its a compatibility hazard. The linker will
+# generate load commands differently based on what minimum OS it can assume.
+
+include ../../run-make-fulldeps/tools.mk
+
+ifeq ($(strip $(shell uname -m)),arm64)
+	GREP_PATTERN = "minos 11.0"
+else
+ 	GREP_PATTERN = "version 10.9"
+endif
+
+OUT_FILE=$(TMPDIR)/with_deployment_target.dylib
+all:
+	env MACOSX_DEPLOYMENT_TARGET=10.9 $(RUSTC) with_deployment_target.rs -o $(OUT_FILE)
+# XXX: The check is for either the x86_64 minimum OR the aarch64 minimum (M1 starts at macOS 11).
+# They also use different load commands, so we let that change with each too. The aarch64 check
+# isn't as robust as the x86 one, but testing both seems unneeded.
+	vtool -show-build $(OUT_FILE) | $(CGREP) -e $(GREP_PATTERN)

src/test/run-make/macos-deployment-target/with_deployment_target.rs

@@ -0,0 +1,4 @@
+#![crate_type = "cdylib"]
+
+#[allow(dead_code)]
+fn something_and_nothing() {}

src/test/ui/inline-const/expr-with-block-err.rs

@@ -0,0 +1,6 @@
+#![feature(inline_const)]
+
+fn main() {
+    const { 2 } - const { 1 };
+    //~^ ERROR mismatched types
+}

src/test/ui/inline-const/expr-with-block-err.stderr

@@ -0,0 +1,9 @@
+error[E0308]: mismatched types
+  --> $DIR/expr-with-block-err.rs:4:13
+   |
+LL |     const { 2 } - const { 1 };
+   |             ^ expected `()`, found integer
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.

src/test/ui/inline-const/expr-with-block.rs

@@ -0,0 +1,10 @@
+// check-pass
+#![feature(inline_const)]
+fn main() {
+    match true {
+        true => const {}
+        false => ()
+    }
+    const {}
+    ()
+}

src/test/ui/rfc-2632-const-trait-impl/issue-79450.rs

@@ -0,0 +1,20 @@
+#![feature(const_fmt_arguments_new)]
+#![feature(const_trait_impl)]
+
+#[const_trait]
+trait Tr {
+    fn req(&self);
+
+    fn prov(&self) {
+        println!("lul"); //~ ERROR: cannot call non-const fn `_print` in constant functions
+        self.req();
+    }
+}
+
+struct S;
+
+impl const Tr for S {
+    fn req(&self) {}
+}
+
+fn main() {}

src/test/ui/rfc-2632-const-trait-impl/issue-79450.stderr

@@ -0,0 +1,12 @@
+error[E0015]: cannot call non-const fn `_print` in constant functions
+  --> $DIR/issue-79450.rs:9:9
+   |
+LL |         println!("lul");
+   |         ^^^^^^^^^^^^^^^
+   |
+   = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
+   = note: this error originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0015`.

src/test/ui/suggestions/dont-suggest-ufcs-for-const.stderr

@@ -2,13 +2,7 @@ error[E0599]: no method named `MAX` found for type `u32` in the current scope
   --> $DIR/dont-suggest-ufcs-for-const.rs:2:11
    |
 LL |     1_u32.MAX();
-   |     ------^^^--
-   |     |     |
-   |     |     this is an associated function, not a method
-   |     help: use associated function syntax instead: `u32::MAX()`
-   |
-   = note: found the following associated functions; to be used as methods, functions must have a `self` parameter
-   = note: the candidate is defined in an impl for the type `u32`
+   |           ^^^ method not found in `u32`
 
 error: aborting due to previous error