expand: Micro-optimize prelude injection

Use `splice` to avoid shifting the other items twice.
Put `extern crate std;` first so it's already resolved when we resolve `::std::prelude::rust_20XX`.

53 files changed, 105 insertions, 107 deletions

diff --git a/compiler/rustc_builtin_macros/src/standard_library_imports.rs b/compiler/rustc_builtin_macros/src/standard_library_imports.rs
index 682e7c9b17a..2068b5ca54d 100644
--- a/compiler/rustc_builtin_macros/src/standard_library_imports.rs
+++ b/compiler/rustc_builtin_macros/src/standard_library_imports.rs
@@ -47,8 +47,6 @@ pub fn inject(
         ast::ItemKind::ExternCrate(None, Ident::new(name, ident_span)),
     );
 
-    krate.items.insert(0, item);
-
     let root = (edition == Edition2015).then_some(kw::PathRoot);
 
     let import_path = root
@@ -75,6 +73,6 @@ pub fn inject(
         }),
     );
 
-    krate.items.insert(0, use_item);
+    krate.items.splice(0..0, [item, use_item]);
     krate.items.len() - orig_num_items
 }
diff --git a/tests/pretty/asm.pp b/tests/pretty/asm.pp
index e6c9545f51e..dca28f99a37 100644
--- a/tests/pretty/asm.pp
+++ b/tests/pretty/asm.pp
@@ -1,9 +1,9 @@
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-mode:expanded
 //@ pp-exact:asm.pp
 //@ only-x86_64
diff --git a/tests/pretty/cast-lt.pp b/tests/pretty/cast-lt.pp
index f6155c9d827..e82636edca7 100644
--- a/tests/pretty/cast-lt.pp
+++ b/tests/pretty/cast-lt.pp
@@ -1,9 +1,9 @@
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-compare-only
 //@ pretty-mode:expanded
 //@ pp-exact:cast-lt.pp
diff --git a/tests/pretty/dollar-crate.pp b/tests/pretty/dollar-crate.pp
index 561a9500aaa..31a55ec2bda 100644
--- a/tests/pretty/dollar-crate.pp
+++ b/tests/pretty/dollar-crate.pp
@@ -1,9 +1,9 @@
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-compare-only
 //@ pretty-mode:expanded
 //@ pp-exact:dollar-crate.pp
diff --git a/tests/pretty/expanded-and-path-remap-80832.pp b/tests/pretty/expanded-and-path-remap-80832.pp
index 5b3922bb329..6206498e4a2 100644
--- a/tests/pretty/expanded-and-path-remap-80832.pp
+++ b/tests/pretty/expanded-and-path-remap-80832.pp
@@ -1,9 +1,9 @@
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 // Test for issue 80832
 //
 //@ pretty-mode:expanded
diff --git a/tests/pretty/format-args-str-escape.pp b/tests/pretty/format-args-str-escape.pp
index 277b608475c..d0bd7cf0c72 100644
--- a/tests/pretty/format-args-str-escape.pp
+++ b/tests/pretty/format-args-str-escape.pp
@@ -1,9 +1,9 @@
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-compare-only
 //@ pretty-mode:expanded
 //@ pp-exact:format-args-str-escape.pp
diff --git a/tests/pretty/hir-delegation.pp b/tests/pretty/hir-delegation.pp
index c0d724cccb5..f8ad02f2fcc 100644
--- a/tests/pretty/hir-delegation.pp
+++ b/tests/pretty/hir-delegation.pp
@@ -4,10 +4,10 @@
 
 #![allow(incomplete_features)]
 #![feature(fn_delegation)]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 fn b<C>(e: C) { }
 
diff --git a/tests/pretty/hir-fn-params.pp b/tests/pretty/hir-fn-params.pp
index cfb33cc93eb..fb4ea0304e5 100644
--- a/tests/pretty/hir-fn-params.pp
+++ b/tests/pretty/hir-fn-params.pp
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-compare-only
 //@ pretty-mode:hir
 //@ pp-exact:hir-fn-params.pp
diff --git a/tests/pretty/hir-fn-variadic.pp b/tests/pretty/hir-fn-variadic.pp
index 99919e7fc6b..c0f5b7069a2 100644
--- a/tests/pretty/hir-fn-variadic.pp
+++ b/tests/pretty/hir-fn-variadic.pp
@@ -3,10 +3,10 @@
 //@ pp-exact:hir-fn-variadic.pp
 
 #![feature(c_variadic)]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 extern "C" {
     unsafe fn foo(x: i32, va1: ...);
diff --git a/tests/pretty/hir-if-else.pp b/tests/pretty/hir-if-else.pp
index 4bccde663eb..af5d31b07cb 100644
--- a/tests/pretty/hir-if-else.pp
+++ b/tests/pretty/hir-if-else.pp
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-compare-only
 //@ pretty-mode:hir
 //@ pp-exact:hir-if-else.pp
diff --git a/tests/pretty/hir-lifetimes.pp b/tests/pretty/hir-lifetimes.pp
index 1bb2f17cdfb..00c052d3f79 100644
--- a/tests/pretty/hir-lifetimes.pp
+++ b/tests/pretty/hir-lifetimes.pp
@@ -5,10 +5,10 @@
 // This tests the pretty-printing of lifetimes in lots of ways.
 
 #![allow(unused)]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 struct Foo<'a> {
     x: &'a u32,
diff --git a/tests/pretty/hir-pretty-attr.pp b/tests/pretty/hir-pretty-attr.pp
index c780f8e3639..01bfe2c0954 100644
--- a/tests/pretty/hir-pretty-attr.pp
+++ b/tests/pretty/hir-pretty-attr.pp
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-compare-only
 //@ pretty-mode:hir
 //@ pp-exact:hir-pretty-attr.pp
diff --git a/tests/pretty/hir-pretty-loop.pp b/tests/pretty/hir-pretty-loop.pp
index c07120273c9..a0830c5188a 100644
--- a/tests/pretty/hir-pretty-loop.pp
+++ b/tests/pretty/hir-pretty-loop.pp
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-compare-only
 //@ pretty-mode:hir
 //@ pp-exact:hir-pretty-loop.pp
diff --git a/tests/pretty/hir-struct-expr.pp b/tests/pretty/hir-struct-expr.pp
index 177eb5e8631..bb222dc2e5f 100644
--- a/tests/pretty/hir-struct-expr.pp
+++ b/tests/pretty/hir-struct-expr.pp
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-compare-only
 //@ pretty-mode:hir
 //@ pp-exact:hir-struct-expr.pp
diff --git a/tests/pretty/if-else.pp b/tests/pretty/if-else.pp
index d4ff02c5441..f29b693e571 100644
--- a/tests/pretty/if-else.pp
+++ b/tests/pretty/if-else.pp
@@ -1,9 +1,9 @@
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-compare-only
 //@ pretty-mode:expanded
 //@ pp-exact:if-else.pp
diff --git a/tests/pretty/issue-12590-c.pp b/tests/pretty/issue-12590-c.pp
index 691738a89ed..0df095b0ee5 100644
--- a/tests/pretty/issue-12590-c.pp
+++ b/tests/pretty/issue-12590-c.pp
@@ -1,9 +1,9 @@
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-compare-only
 //@ pretty-mode:expanded
 //@ pp-exact:issue-12590-c.pp
diff --git a/tests/pretty/issue-4264.pp b/tests/pretty/issue-4264.pp
index f4b641335d1..1344923f4c4 100644
--- a/tests/pretty/issue-4264.pp
+++ b/tests/pretty/issue-4264.pp
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-compare-only
 //@ pretty-mode:hir,typed
 //@ pp-exact:issue-4264.pp
diff --git a/tests/pretty/issue-85089.pp b/tests/pretty/issue-85089.pp
index 31c0f90bf27..28a85bdf4ad 100644
--- a/tests/pretty/issue-85089.pp
+++ b/tests/pretty/issue-85089.pp
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 // Test to print lifetimes on HIR pretty-printing.
 
 //@ pretty-compare-only
diff --git a/tests/pretty/never-pattern.pp b/tests/pretty/never-pattern.pp
index 923ad9b82c7..1ce332ea506 100644
--- a/tests/pretty/never-pattern.pp
+++ b/tests/pretty/never-pattern.pp
@@ -7,10 +7,10 @@
 #![allow(incomplete_features)]
 #![feature(never_patterns)]
 #![feature(never_type)]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 fn f(x: Result<u32, !>) { _ = match x { Ok(x) => x, Err(!) , }; }
 
diff --git a/tests/pretty/pin-ergonomics-hir.pp b/tests/pretty/pin-ergonomics-hir.pp
index 58a1c62f712..beca5988017 100644
--- a/tests/pretty/pin-ergonomics-hir.pp
+++ b/tests/pretty/pin-ergonomics-hir.pp
@@ -4,10 +4,10 @@
 
 #![feature(pin_ergonomics)]
 #![allow(dead_code, incomplete_features)]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 use std::pin::Pin;
 
diff --git a/tests/pretty/postfix-match/precedence.pp b/tests/pretty/postfix-match/precedence.pp
index 2052b445a2b..b6ff45daea1 100644
--- a/tests/pretty/postfix-match/precedence.pp
+++ b/tests/pretty/postfix-match/precedence.pp
@@ -1,10 +1,10 @@
 #![feature(prelude_import)]
 #![no_std]
 #![feature(postfix_match)]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 use std::ops::Add;
 
diff --git a/tests/pretty/shebang-at-top.pp b/tests/pretty/shebang-at-top.pp
index a2797252636..197def4a154 100644
--- a/tests/pretty/shebang-at-top.pp
+++ b/tests/pretty/shebang-at-top.pp
@@ -1,10 +1,10 @@
 #!/usr/bin/env rust
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ pretty-mode:expanded
 //@ pp-exact:shebang-at-top.pp
 //@ pretty-compare-only
diff --git a/tests/pretty/tests-are-sorted.pp b/tests/pretty/tests-are-sorted.pp
index d6a2c0ff979..9e1566b2eff 100644
--- a/tests/pretty/tests-are-sorted.pp
+++ b/tests/pretty/tests-are-sorted.pp
@@ -1,9 +1,9 @@
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ compile-flags: --crate-type=lib --test --remap-path-prefix={{src-base}}/=/the/src/ --remap-path-prefix={{src-base}}\=/the/src/
 //@ pretty-compare-only
 //@ pretty-mode:expanded
diff --git a/tests/ui/asm/unpretty-expanded.stdout b/tests/ui/asm/unpretty-expanded.stdout
index 7ba1702dfed..7678f6bc345 100644
--- a/tests/ui/asm/unpretty-expanded.stdout
+++ b/tests/ui/asm/unpretty-expanded.stdout
@@ -1,9 +1,9 @@
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ needs-asm-support
 //@ check-pass
 //@ compile-flags: -Zunpretty=expanded
diff --git a/tests/ui/associated-type-bounds/return-type-notation/unpretty-parenthesized.stdout b/tests/ui/associated-type-bounds/return-type-notation/unpretty-parenthesized.stdout
index 87667553837..7499df5be5d 100644
--- a/tests/ui/associated-type-bounds/return-type-notation/unpretty-parenthesized.stdout
+++ b/tests/ui/associated-type-bounds/return-type-notation/unpretty-parenthesized.stdout
@@ -1,8 +1,8 @@
 #![feature(prelude_import)]
-#[prelude_import]
-use std::prelude::rust_2021::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use std::prelude::rust_2021::*;
 //@ edition: 2021
 //@ compile-flags: -Zunpretty=expanded
 //@ check-pass
diff --git a/tests/ui/codemap_tests/unicode.expanded.stdout b/tests/ui/codemap_tests/unicode.expanded.stdout
index c88035de044..af375108b47 100644
--- a/tests/ui/codemap_tests/unicode.expanded.stdout
+++ b/tests/ui/codemap_tests/unicode.expanded.stdout
@@ -1,9 +1,9 @@
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ revisions: normal expanded
 //@[expanded] check-pass
 //@[expanded]compile-flags: -Zunpretty=expanded
diff --git a/tests/ui/const-generics/defaults/pretty-printing-ast.stdout b/tests/ui/const-generics/defaults/pretty-printing-ast.stdout
index b6cb7fa09c8..030fcec9cf2 100644
--- a/tests/ui/const-generics/defaults/pretty-printing-ast.stdout
+++ b/tests/ui/const-generics/defaults/pretty-printing-ast.stdout
@@ -6,10 +6,10 @@
 //@ edition: 2015
 
 #![crate_type = "lib"]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 trait Foo<const KIND : bool = true> {}
 
diff --git a/tests/ui/deriving/built-in-proc-macro-scope.stdout b/tests/ui/deriving/built-in-proc-macro-scope.stdout
index 2697618ab00..4fbce5edb81 100644
--- a/tests/ui/deriving/built-in-proc-macro-scope.stdout
+++ b/tests/ui/deriving/built-in-proc-macro-scope.stdout
@@ -6,10 +6,10 @@
 //@ edition:2015
 
 #![feature(derive_coerce_pointee)]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 #[macro_use]
 extern crate another_proc_macro;
diff --git a/tests/ui/deriving/deriving-all-codegen.stdout b/tests/ui/deriving/deriving-all-codegen.stdout
index fa8f249373d..0e4bfa30257 100644
--- a/tests/ui/deriving/deriving-all-codegen.stdout
+++ b/tests/ui/deriving/deriving-all-codegen.stdout
@@ -17,10 +17,10 @@
 #![crate_type = "lib"]
 #![allow(dead_code)]
 #![allow(deprecated)]
-#[prelude_import]
-use std::prelude::rust_2021::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use std::prelude::rust_2021::*;
 
 // Empty struct.
 struct Empty;
diff --git a/tests/ui/deriving/deriving-coerce-pointee-expanded.stdout b/tests/ui/deriving/deriving-coerce-pointee-expanded.stdout
index 84f8e9a3195..89300a5c6d0 100644
--- a/tests/ui/deriving/deriving-coerce-pointee-expanded.stdout
+++ b/tests/ui/deriving/deriving-coerce-pointee-expanded.stdout
@@ -4,10 +4,10 @@
 //@ compile-flags: -Zunpretty=expanded
 //@ edition: 2015
 #![feature(derive_coerce_pointee)]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 use std::marker::CoercePointee;
 
 pub trait MyTrait<T: ?Sized> {}
diff --git a/tests/ui/deriving/proc-macro-attribute-mixing.stdout b/tests/ui/deriving/proc-macro-attribute-mixing.stdout
index faa9c0218a3..b81110682d6 100644
--- a/tests/ui/deriving/proc-macro-attribute-mixing.stdout
+++ b/tests/ui/deriving/proc-macro-attribute-mixing.stdout
@@ -12,10 +12,10 @@
 //@ edition: 2015
 
 #![feature(derive_coerce_pointee)]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 #[macro_use]
 extern crate another_proc_macro;
diff --git a/tests/ui/lint/rfc-2383-lint-reason/no_ice_for_partial_compiler_runs.stdout b/tests/ui/lint/rfc-2383-lint-reason/no_ice_for_partial_compiler_runs.stdout
index d63abea9230..80abac44ca8 100644
--- a/tests/ui/lint/rfc-2383-lint-reason/no_ice_for_partial_compiler_runs.stdout
+++ b/tests/ui/lint/rfc-2383-lint-reason/no_ice_for_partial_compiler_runs.stdout
@@ -1,9 +1,9 @@
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 // This ensures that ICEs like rust#94953 don't happen
 //@ check-pass
 //@ compile-flags: -Z unpretty=expanded
diff --git a/tests/ui/macros/genercs-in-path-with-prettry-hir.stdout b/tests/ui/macros/genercs-in-path-with-prettry-hir.stdout
index 6b0300132b5..ba93384644d 100644
--- a/tests/ui/macros/genercs-in-path-with-prettry-hir.stdout
+++ b/tests/ui/macros/genercs-in-path-with-prettry-hir.stdout
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ compile-flags: -Zunpretty=hir
 //@ edition: 2015
 
diff --git a/tests/ui/macros/rfc-2011-nicer-assert-messages/non-consuming-methods-have-optimized-codegen.stdout b/tests/ui/macros/rfc-2011-nicer-assert-messages/non-consuming-methods-have-optimized-codegen.stdout
index 33193c78334..e29655faabe 100644
--- a/tests/ui/macros/rfc-2011-nicer-assert-messages/non-consuming-methods-have-optimized-codegen.stdout
+++ b/tests/ui/macros/rfc-2011-nicer-assert-messages/non-consuming-methods-have-optimized-codegen.stdout
@@ -5,10 +5,10 @@
 //@ edition: 2015
 
 #![feature(core_intrinsics, generic_assert)]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 fn arbitrary_consuming_method_for_demonstration_purposes() {
     let elem = 1i32;
diff --git a/tests/ui/match/issue-82392.stdout b/tests/ui/match/issue-82392.stdout
index 3efc964e053..d7eef049739 100644
--- a/tests/ui/match/issue-82392.stdout
+++ b/tests/ui/match/issue-82392.stdout
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 // https://github.com/rust-lang/rust/issues/82329
 //@ compile-flags: -Zunpretty=hir,typed
 //@ check-pass
diff --git a/tests/ui/proc-macro/meta-macro-hygiene.stdout b/tests/ui/proc-macro/meta-macro-hygiene.stdout
index 91d16eca1b0..452598c372c 100644
--- a/tests/ui/proc-macro/meta-macro-hygiene.stdout
+++ b/tests/ui/proc-macro/meta-macro-hygiene.stdout
@@ -16,10 +16,10 @@ Respanned: TokenStream [Ident { ident: "$crate", span: $DIR/auxiliary/make-macro
 // in the stdout
 
 #![no_std /* 0#0 */]
-#[prelude_import /* 0#1 */]
-use core /* 0#1 */::prelude /* 0#1 */::rust_2018 /* 0#1 */::*;
 #[macro_use /* 0#1 */]
 extern crate core /* 0#1 */;
+#[prelude_import /* 0#1 */]
+use core /* 0#1 */::prelude /* 0#1 */::rust_2018 /* 0#1 */::*;
 // Don't load unnecessary hygiene information from std
 extern crate std /* 0#0 */;
 
diff --git a/tests/ui/proc-macro/nonterminal-token-hygiene.stdout b/tests/ui/proc-macro/nonterminal-token-hygiene.stdout
index 63741326e34..e10a5199f17 100644
--- a/tests/ui/proc-macro/nonterminal-token-hygiene.stdout
+++ b/tests/ui/proc-macro/nonterminal-token-hygiene.stdout
@@ -36,10 +36,10 @@ PRINT-BANG INPUT (DEBUG): TokenStream [
 
 #![feature /* 0#0 */(decl_macro)]
 #![no_std /* 0#0 */]
-#[prelude_import /* 0#1 */]
-use ::core /* 0#1 */::prelude /* 0#1 */::rust_2015 /* 0#1 */::*;
 #[macro_use /* 0#1 */]
 extern crate core /* 0#2 */;
+#[prelude_import /* 0#1 */]
+use ::core /* 0#1 */::prelude /* 0#1 */::rust_2015 /* 0#1 */::*;
 // Don't load unnecessary hygiene information from std
 extern crate std /* 0#0 */;
 
diff --git a/tests/ui/proc-macro/quote/debug.stdout b/tests/ui/proc-macro/quote/debug.stdout
index 3acb472d9c0..77c52f02a33 100644
--- a/tests/ui/proc-macro/quote/debug.stdout
+++ b/tests/ui/proc-macro/quote/debug.stdout
@@ -12,10 +12,10 @@
 
 #![feature(proc_macro_quote)]
 #![crate_type = "proc-macro"]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 extern crate proc_macro;
 
diff --git a/tests/ui/rfcs/rfc-2497-if-let-chains/ast-pretty-check.stdout b/tests/ui/rfcs/rfc-2497-if-let-chains/ast-pretty-check.stdout
index e2e45ae94ea..66ba726fb9a 100644
--- a/tests/ui/rfcs/rfc-2497-if-let-chains/ast-pretty-check.stdout
+++ b/tests/ui/rfcs/rfc-2497-if-let-chains/ast-pretty-check.stdout
@@ -1,9 +1,9 @@
 #![feature(prelude_import)]
 #![no_std]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ check-pass
 //@ compile-flags: -Z unpretty=expanded
 //@ edition: 2015
diff --git a/tests/ui/type-alias-impl-trait/issue-60662.stdout b/tests/ui/type-alias-impl-trait/issue-60662.stdout
index 52152a73aff..7ad29c88bcf 100644
--- a/tests/ui/type-alias-impl-trait/issue-60662.stdout
+++ b/tests/ui/type-alias-impl-trait/issue-60662.stdout
@@ -3,10 +3,10 @@
 //@ edition: 2015
 
 #![feature(type_alias_impl_trait)]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 trait Animal { }
 
diff --git a/tests/ui/unpretty/bad-literal.stdout b/tests/ui/unpretty/bad-literal.stdout
index ba8467359cd..1f697aff27c 100644
--- a/tests/ui/unpretty/bad-literal.stdout
+++ b/tests/ui/unpretty/bad-literal.stdout
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ compile-flags: -Zunpretty=hir
 //@ check-fail
 //@ edition: 2015
diff --git a/tests/ui/unpretty/debug-fmt-hir.stdout b/tests/ui/unpretty/debug-fmt-hir.stdout
index 1d224c9e91f..9c79421e32a 100644
--- a/tests/ui/unpretty/debug-fmt-hir.stdout
+++ b/tests/ui/unpretty/debug-fmt-hir.stdout
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ compile-flags: -Zunpretty=hir
 //@ check-pass
 //@ edition: 2015
diff --git a/tests/ui/unpretty/deprecated-attr.stdout b/tests/ui/unpretty/deprecated-attr.stdout
index 0abeef6f61e..26cc74c1160 100644
--- a/tests/ui/unpretty/deprecated-attr.stdout
+++ b/tests/ui/unpretty/deprecated-attr.stdout
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ compile-flags: -Zunpretty=hir
 //@ check-pass
 //@ edition: 2015
diff --git a/tests/ui/unpretty/diagnostic-attr.stdout b/tests/ui/unpretty/diagnostic-attr.stdout
index a1325c61ca7..4822cf4700b 100644
--- a/tests/ui/unpretty/diagnostic-attr.stdout
+++ b/tests/ui/unpretty/diagnostic-attr.stdout
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ compile-flags: -Zunpretty=hir
 //@ check-pass
 //@ edition: 2015
diff --git a/tests/ui/unpretty/exhaustive-asm.expanded.stdout b/tests/ui/unpretty/exhaustive-asm.expanded.stdout
index 92829b0ab15..9a58e4c2877 100644
--- a/tests/ui/unpretty/exhaustive-asm.expanded.stdout
+++ b/tests/ui/unpretty/exhaustive-asm.expanded.stdout
@@ -1,8 +1,8 @@
 #![feature(prelude_import)]
-#[prelude_import]
-use std::prelude::rust_2024::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use std::prelude::rust_2024::*;
 //@ revisions: expanded hir
 //@[expanded]compile-flags: -Zunpretty=expanded
 //@[expanded]check-pass
diff --git a/tests/ui/unpretty/exhaustive-asm.hir.stdout b/tests/ui/unpretty/exhaustive-asm.hir.stdout
index bbd846a8845..b33b38c2cab 100644
--- a/tests/ui/unpretty/exhaustive-asm.hir.stdout
+++ b/tests/ui/unpretty/exhaustive-asm.hir.stdout
@@ -1,7 +1,7 @@
-#[prelude_import]
-use std::prelude::rust_2024::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use std::prelude::rust_2024::*;
 //@ revisions: expanded hir
 //@[expanded]compile-flags: -Zunpretty=expanded
 //@[expanded]check-pass
diff --git a/tests/ui/unpretty/exhaustive.expanded.stdout b/tests/ui/unpretty/exhaustive.expanded.stdout
index 53ca3c8e391..6b08f3e1cd7 100644
--- a/tests/ui/unpretty/exhaustive.expanded.stdout
+++ b/tests/ui/unpretty/exhaustive.expanded.stdout
@@ -29,10 +29,10 @@
 #![feature(try_blocks)]
 #![feature(yeet_expr)]
 #![allow(incomplete_features)]
-#[prelude_import]
-use std::prelude::rust_2024::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use std::prelude::rust_2024::*;
 
 #[prelude_import]
 use self::prelude::*;
diff --git a/tests/ui/unpretty/exhaustive.hir.stdout b/tests/ui/unpretty/exhaustive.hir.stdout
index 77807728c9d..9cfa65f5801 100644
--- a/tests/ui/unpretty/exhaustive.hir.stdout
+++ b/tests/ui/unpretty/exhaustive.hir.stdout
@@ -28,10 +28,10 @@
 #![feature(try_blocks)]
 #![feature(yeet_expr)]
 #![allow(incomplete_features)]
-#[prelude_import]
-use std::prelude::rust_2024::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use std::prelude::rust_2024::*;
 
 #[prelude_import]
 use self::prelude::*;
diff --git a/tests/ui/unpretty/flattened-format-args.stdout b/tests/ui/unpretty/flattened-format-args.stdout
index 3cd02734665..0792dc10e94 100644
--- a/tests/ui/unpretty/flattened-format-args.stdout
+++ b/tests/ui/unpretty/flattened-format-args.stdout
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ compile-flags: -Zunpretty=hir -Zflatten-format-args=yes
 //@ check-pass
 //@ edition: 2015
diff --git a/tests/ui/unpretty/interpolation-expanded.stdout b/tests/ui/unpretty/interpolation-expanded.stdout
index d46b46b67f4..7284a89e7a9 100644
--- a/tests/ui/unpretty/interpolation-expanded.stdout
+++ b/tests/ui/unpretty/interpolation-expanded.stdout
@@ -10,10 +10,10 @@
 // synthesizing parentheses indiscriminately; only where necessary.
 
 #![feature(if_let_guard)]
-#[prelude_import]
-use std::prelude::rust_2024::*;
 #[macro_use]
 extern crate std;
+#[prelude_import]
+use std::prelude::rust_2024::*;
 
 macro_rules! expr { ($expr:expr) => { $expr }; }
 
diff --git a/tests/ui/unpretty/let-else-hir.stdout b/tests/ui/unpretty/let-else-hir.stdout
index a83790d8bee..14270a57202 100644
--- a/tests/ui/unpretty/let-else-hir.stdout
+++ b/tests/ui/unpretty/let-else-hir.stdout
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ compile-flags: -Zunpretty=hir
 //@ check-pass
 //@ edition: 2015
diff --git a/tests/ui/unpretty/self-hir.stdout b/tests/ui/unpretty/self-hir.stdout
index 1eafc3c8b46..b190565dcc4 100644
--- a/tests/ui/unpretty/self-hir.stdout
+++ b/tests/ui/unpretty/self-hir.stdout
@@ -1,7 +1,7 @@
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 //@ compile-flags: -Zunpretty=hir
 //@ check-pass
 //@ edition: 2015
diff --git a/tests/ui/unpretty/unpretty-expr-fn-arg.stdout b/tests/ui/unpretty/unpretty-expr-fn-arg.stdout
index e9fd2222a8d..c04909a7361 100644
--- a/tests/ui/unpretty/unpretty-expr-fn-arg.stdout
+++ b/tests/ui/unpretty/unpretty-expr-fn-arg.stdout
@@ -8,10 +8,10 @@
 //@ compile-flags: -Zunpretty=hir,typed
 //@ edition: 2015
 #![allow(dead_code)]
-#[prelude_import]
-use ::std::prelude::rust_2015::*;
 #[attr = MacroUse {arguments: UseAll}]
 extern crate std;
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
 
 fn main() ({ } as ())