Stop using rustc_layout_scalar_valid_range_* in rustc

[oli-obk]

Another step towards #135996

Required some manual impls, but we already do many manual impls for the newtype_index types, so it's not really a new maintenance burden.

[rustbot]

Some changes occurred to MIR optimizations

cc @rust-lang/wg-mir-opt

Some changes occurred in coverage instrumentation.

cc @Zalathar

[rustbot]

r? @davidtwco

rustbot has assigned @davidtwco.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

Use r? to explicitly pick a reviewer

Why was this reviewer chosen?

The reviewer was selected based on:

• Owners of files modified in this PR: compiler
• compiler expanded to 68 candidates
• Random selection from 18 candidates

[davidtwco]

LGTM with CI failures fixed

View changes since this review

[oli-obk]

@bors r=davidtwco

[rust-bors]

📌 Commit 01df8d6 has been approved by davidtwco

It is now in the queue for this repository.

[oli-obk]

oh wait

@bors r-

@bors try @rust-timer queue

[rust-bors]

☀️ Try build successful (CI)
Build commit: e8d615a (e8d615a27a9044825333881a720535b5c42eb976, parent: 71e00273c0921e1bc850ae8cc4161fbb44cfa848)

[rust-timer]

Finished benchmarking commit (e8d615a): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please do so in sufficient writing along with @rustbot label: +perf-regression-triaged. If not, please fix the regressions and do another perf run. If its results are neutral or positive, the label will be automatically removed.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	0.2%	[0.2%, 0.2%]	2
Regressions ❌ (secondary)	0.4%	[0.3%, 0.5%]	4
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.2%	[-0.3%, -0.1%]	5
All ❌✅ (primary)	0.2%	[0.2%, 0.2%]	2

Max RSS (memory usage)

Results (primary 2.7%, secondary -3.5%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	2.7%	[2.7%, 2.7%]	1
Regressions ❌ (secondary)	4.9%	[4.9%, 4.9%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-6.2%	[-6.9%, -5.4%]	3
All ❌✅ (primary)	2.7%	[2.7%, 2.7%]	1

Cycles

Results (secondary -2.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.3%	[-2.3%, -2.3%]	1
All ❌✅ (primary)	-	-	0

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 485.967s -> 484.264s (-0.35%)
Artifact size: 397.80 MiB -> 397.80 MiB (0.00%)

[oli-obk]

@bors r=davidtwco

The detailed view of the instruction count regression shows measures time improvements. Those look random, too, so I'm guessing it's just noise

[rust-bors]

📌 Commit 01df8d6 has been approved by davidtwco

It is now in the queue for this repository.

[jhpratt]

Given the large number of rollup=never PRs in the queue and the apparent noise here,

@bors rollup=iffy

[jhpratt]

I believe this is the cause of #152781 (comment), either alone or in combination (whether preliminary CI passes in #152782 will tell for sure)

@bors r-

[Zalathar]

Yeah this definitely has a soft conflict with the recently-merged #152703, because the macro mentions rustc_query_system which no longer exists.

[rustbot]

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

[oli-obk]

@bors r=davidtwco

[rust-bors]

📌 Commit e62bc63 has been approved by davidtwco

It is now in the queue for this repository.

[JonathanBrouwer]

@bors try jobs=dist-x86_64-linux-alt

[rust-bors]

💔 Test for 0825e37 failed: CI. Failed job:

• try - dist-x86_64-linux-alt (web logs, enhanced plaintext logs)

[rust-log-analyzer]

The job dist-x86_64-linux-alt failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

 - LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 111)
 - LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 113)
WARNING: This output is designed for human readability. For machine-readable output, please use --format.
IMAGE                                               ID             DISK USAGE   CONTENT SIZE   EXTRA
ghcr.io/dependabot/dependabot-updater-core:latest   9a6a20114926       1.18GB          310MB        
ghcr.io/rust-lang/buildkit:buildx-stable-1          1e110c71d389        345MB          108MB   U    
rust-ci:latest                                      19b7cb1d8af5        6.6GB         1.71GB        
The push refers to repository [ghcr.io/rust-lang/rust-ci]
61e6afbc8c9e: Waiting
ffdfa2405358: Waiting
3c76e94b39c3: Waiting
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---
[RUSTC-TIMING] rustc_proc_macro test:false 6.114
   Compiling object v0.36.7
[RUSTC-TIMING] rand_core test:false 0.540
   Compiling rand_chacha v0.3.1
error: internal compiler error: /rustc-dev/9b1f8ff42d110b0ca138116745be921df5dc97e7/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs:482:14: debuginfo: unexpected type in type_di_node(): pattern_type!(u32 is 0..=4294967040)


thread 'rustc' (61574) panicked at /rustc-dev/9b1f8ff42d110b0ca138116745be921df5dc97e7/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs:482:14:
Box<dyn Any>
stack backtrace:
   0: std::panicking::begin_panic::<rustc_errors::ExplicitBug>
   1: <rustc_errors::diagnostic::BugAbort as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
   2: rustc_middle::util::bug::opt_span_bug_fmt::<rustc_span::span_encoding::Span>::{closure#0}
   3: rustc_middle::ty::context::tls::with_opt::<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>::{closure#0}
   4: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_opt<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
   5: rustc_middle::util::bug::bug_fmt
   6: rustc_codegen_llvm::debuginfo::metadata::spanned_type_di_node
   7: rustc_codegen_llvm::debuginfo::metadata::build_struct_type_di_node
   8: rustc_codegen_llvm::debuginfo::metadata::spanned_type_di_node
   9: rustc_codegen_llvm::debuginfo::metadata::build_pointer_or_reference_di_node
  10: rustc_codegen_llvm::debuginfo::metadata::spanned_type_di_node
  11: <rustc_codegen_llvm::context::GenericCx<rustc_codegen_llvm::context::FullCx> as rustc_codegen_ssa::traits::debuginfo::DebugInfoCodegenMethods>::dbg_scope_fn
  12: rustc_codegen_ssa::mir::codegen_mir::<rustc_codegen_llvm::builder::GenericBuilder<rustc_codegen_llvm::context::FullCx>>
  13: rustc_codegen_llvm::base::compile_codegen_unit::module_codegen
  14: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::ExtraBackendMethods>::compile_codegen_unit
  15: rustc_codegen_ssa::base::codegen_crate::<rustc_codegen_llvm::LlvmCodegenBackend>
  16: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
  17: <rustc_interface::queries::Linker>::codegen_and_build_linker
  18: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
  19: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

note: using internal features is not supported and expected to cause internal compiler errors when used incorrectly

warning: the ICE couldn't be written to `/checkout/rustc-ice-2026-02-18T21_18_55-61567.txt`: Read-only file system (os error 30)

note: rustc 1.94.0-beta.1 (9b1f8ff42 2026-01-19) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type rlib -C opt-level=3 -C embed-bitcode=no -C codegen-units=1 -C debuginfo=2 -C debug-assertions=on -C overflow-checks=off -C linker=clang -C symbol-mangling-version=v0 -Z unstable-options -Z macro-backtrace -C split-debuginfo=off -C link-args=-Wl,-z,origin -C link-args=-Wl,-rpath,$ORIGIN/../lib -C linker-features=+lld -C link-self-contained=-linker -Z unstable-options -Z on-broken-pipe=kill -Z default-visibility=protected -C link-args=-Wl,--icf=all -Z binary-dep-depinfo -Z tls-model=initial-exec -Z force-unstable-if-unmarked

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
[RUSTC-TIMING] rustc_data_structures test:false 2.131
error: could not compile `rustc_data_structures` (lib)

Caused by:
  process didn't exit successfully: `sccache /checkout/obj/build/bootstrap/debug/rustc --crate-name rustc_data_structures --edition=2024 compiler/rustc_data_structures/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no -C codegen-units=1 -C debuginfo=2 -C debug-assertions=on -C overflow-checks=off --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=10f3b50391127aa3 -C extra-filename=-80c870154202757a --out-dir /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -C linker=clang -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/release/deps --extern arrayvec=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libarrayvec-d6190e28aa097e96.rmeta --extern bitflags=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libbitflags-15ef7b03bb4450ef.rmeta --extern either=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libeither-c0ebec80944733f7.rmeta --extern elsa=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libelsa-157660b6d3adea58.rmeta --extern ena=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libena-400969a822bd86c7.rmeta --extern hashbrown=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libhashbrown-68c494cca00134c9.rmeta --extern indexmap=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libindexmap-95d4f5f27f099448.rmeta --extern jobserver_crate=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libjobserver-f1452bc86d9d4024.rmeta --extern libc=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/liblibc-fc45d3f0694d8299.rmeta --extern measureme=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libmeasureme-dbe80c743c6784ca.rmeta --extern memmap2=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libmemmap2-a434137ff35b5466.rmeta --extern parking_lot=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libparking_lot-a370a180016e7643.rmeta --extern rustc_hash=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_hash-34438c06218e8acb.rmeta --extern rustc_stable_hash=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_stable_hash-7a58dc26412cc347.rmeta --extern rustc_arena=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_arena-fd03212626980329.rmeta --extern rustc_graphviz=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_graphviz-163b437f94dfc211.rmeta --extern rustc_hashes=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_hashes-d9561b151a3ca5d2.rmeta --extern rustc_index=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_index-47ab9c16bab24d3d.rmeta --extern rustc_macros=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/release/deps/librustc_macros-230eca65edf60c7a.so --extern rustc_serialize=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_serialize-fbfc8fecd35db103.rmeta --extern rustc_thread_pool=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_thread_pool-4a0dc2276bca46bf.rmeta --extern smallvec=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libsmallvec-86e9f7c23084a1f4.rmeta --extern stacker=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libstacker-89caf9c6073cf805.rmeta --extern tempfile=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libtempfile-35de4b883378682e.rmeta --extern thin_vec=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libthin_vec-7e5bfa9bda548462.rmeta --extern tracing=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libtracing-a46c1ec47956bef3.rmeta --cfg=windows_raw_dylib -Csymbol-mangling-version=v0 -Zunstable-options '--check-cfg=cfg(bootstrap)' -Zmacro-backtrace -Csplit-debuginfo=off -Clink-args=-Wl,-z,origin '-Clink-args=-Wl,-rpath,$ORIGIN/../lib' -Clinker-features=+lld -Clink-self-contained=-linker -Zunstable-options -Zon-broken-pipe=kill -Zdefault-visibility=protected -Clink-args=-Wl,--icf=all --cfg=bootstrap -Z binary-dep-depinfo -L native=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/build/psm-1aead79f3927df2a/out` (exit status: 101)
warning: build failed, waiting for other jobs to finish...
[RUSTC-TIMING] unicode_normalization test:false 1.077
[RUSTC-TIMING] regex test:false 2.853
[RUSTC-TIMING] serde test:false 1.772
[RUSTC-TIMING] build_script_build test:false 0.142

[JonathanBrouwer]

@bors r-

[rust-bors]

Commit e62bc63 has been unapproved.

This PR was contained in a rollup (#152810), which was also unapproved.