Replace NullOp::SizeOf and NullOp::AlignOf by lang items.

[cjgillot]

r? @ghost

[cjgillot]

@bors try @rust-timer queue

[rust-bors]

☀️ Try build successful (CI)
Build commit: 2cefd8f (2cefd8ff4961f18771f6f840878942cbfbc03afe, parent: 53a741fc4b8cf2d8e7b1b2336ed8edf889db84f4)

[rust-timer]

Finished benchmarking commit (2cefd8f): 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)	0.5%	[0.4%, 0.6%]	3
Regressions ❌ (secondary)	0.7%	[0.5%, 0.7%]	4
Improvements ✅ (primary)	-0.2%	[-0.2%, -0.1%]	2
Improvements ✅ (secondary)	-0.2%	[-0.7%, -0.1%]	14
All ❌✅ (primary)	0.2%	[-0.2%, 0.6%]	5

Max RSS (memory usage)

Results (primary -0.3%, secondary -1.4%)

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

	mean	range	count
Regressions ❌ (primary)	1.5%	[0.4%, 3.0%]	8
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-3.4%	[-7.6%, -1.1%]	5
Improvements ✅ (secondary)	-1.4%	[-2.2%, -0.8%]	3
All ❌✅ (primary)	-0.3%	[-7.6%, 3.0%]	13

Cycles

Results (primary -2.9%, secondary 6.8%)

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)	6.8%	[6.8%, 6.8%]	1
Improvements ✅ (primary)	-2.9%	[-2.9%, -2.9%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-2.9%	[-2.9%, -2.9%]	1

Binary size

Results (primary -0.0%, secondary -0.3%)

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

	mean	range	count
Regressions ❌ (primary)	0.1%	[0.0%, 0.5%]	22
Regressions ❌ (secondary)	0.0%	[0.0%, 0.1%]	11
Improvements ✅ (primary)	-0.2%	[-0.8%, -0.0%]	18
Improvements ✅ (secondary)	-1.2%	[-3.2%, -0.3%]	4
All ❌✅ (primary)	-0.0%	[-0.8%, 0.5%]	40

Bootstrap: 475.105s -> 474.369s (-0.15%)
Artifact size: 390.35 MiB -> 390.39 MiB (0.01%)

[rust-log-analyzer]

The job x86_64-gnu-llvm-20 failed! Check out the build log: (web) (plain enhanced) (plain)

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

---- [ui] tests/ui/limits/issue-17913.rs stdout ---- Saved the actual stderr to `/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/limits/issue-17913/issue-17913.stderr` diff of stderr: 9 = note: evaluation of `<[&usize; usize::MAX] as std::mem::SizedTypeProperties>::ALIGN` failed here 10 11 note: the above error was encountered while instantiating `fn Box::<[&usize; usize::MAX]>::new` - --> $DIR/issue-17913.rs:8:21 + --> $DIR/issue-17913.rs:15:21 13 | 14 LL | let a: Box<_> = Box::new([&n; SIZE]); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 16 17 error: aborting due to 2 previous errors 18 --- To only update this specific test, also pass `--test-args limits/issue-17913.rs` error: 1 errors occurred comparing output. status: exit status: 1 command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/limits/issue-17913.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2" "--target=i686-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/limits/issue-17913" "-A" "unused" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/i686-unknown-linux-gnu/native/rust-test-helpers" "-Clinker=x86_64-linux-gnu-gcc" stdout: none --- stderr ------------------------------- error[E0080]: values of the type `[&usize; usize::MAX]` are too big for the target architecture ##[error] --> /rustc/FAKE_PREFIX/library/core/src/mem/mod.rs:1242:25 | = note: evaluation of `<[&usize; usize::MAX] as std::mem::SizedTypeProperties>::SIZE` failed here error[E0080]: values of the type `[&usize; usize::MAX]` are too big for the target architecture ##[error] --> /rustc/FAKE_PREFIX/library/core/src/mem/mod.rs:1247:26 | = note: evaluation of `<[&usize; usize::MAX] as std::mem::SizedTypeProperties>::ALIGN` failed here note: the above error was encountered while instantiating `fn Box::<[&usize; usize::MAX]>::new` --> /checkout/tests/ui/limits/issue-17913.rs:15:21 | LL | let a: Box<_> = Box::new([&n; 0xFFFFFFFF_usize]); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0080`.