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Jacob Pratt 8951c74e2a
Rollup merge of #138285 - beetrees:repr128-stable, r=traviscross,bjorn3 
Stabilize `repr128`

## Stabilisation report

The `repr128` feature ([tracking issue](https://github.com/rust-lang/rust/issues/56071)) allows the use of `#[repr(u128)]` and `#[repr(i128)]` on enums in the same way that other primitive representations such as `#[repr(u64)]` can be used. For example:

```rust
#[repr(u128)]
enum Foo {
    One = 1,
    Two,
    Big = u128::MAX,
}

#[repr(i128)]
enum Bar {
    HasThing(u16) = 42,
    HasSomethingElse(i64) = u64::MAX as i128 + 1,
    HasNothing,
}
```

This is the final part of adding 128-bit integers to Rust ([RFC 1504](https://rust-lang.github.io/rfcs/1504-int128.html)); all other parts of 128-bit integer support were stabilised in #49101 back in 2018.

From a design perspective, `#[repr(u128)]`/`#[repr(i128)]` function like `#[repr(u64)]`/`#[repr(i64)]` but for 128-bit integers instead of 64-bit integers. The only differences are:

- FFI safety: as `u128`/`i128` are not currently considered FFI safe, neither are `#[repr(u128)]`/`#[repr(i128)]` enums (I discovered this wasn't the case while drafting this stabilisation report, so I have submitted #138282 to fix this).
- Debug info: while none of the major debuggers currently support 128-bit integers, as of LLVM 20 `rustc` will emit valid debuginfo for both DWARF and PDB (PDB makes use of the same natvis that is also used for all enums with fields, whereas DWARF has native support).

Tests for `#[repr(u128)]`/`#[repr(i128)]` enums include:
- [ui/enum-discriminant/repr128.rs](385970f0c1/tests/ui/enum-discriminant/repr128.rs): checks that 128-bit enum discriminants have the correct values.
- [debuginfo/msvc-pretty-enums.rs](385970f0c1/tests/debuginfo/msvc-pretty-enums.rs): checks the PDB debuginfo is correct.
- [run-make/repr128-dwarf](385970f0c1/tests/run-make/repr128-dwarf/rmake.rs): checks the DWARF debuginfo is correct.

Stabilising this feature does not require any changes to the Rust Reference as [the documentation on primitive representations](https://doc.rust-lang.org/nightly/reference/type-layout.html#r-layout.repr.primitive.intro) already includes `u128` and `i128`.

Closes #56071
Closes https://github.com/rust-lang/reference/issues/1368

r? lang

```@rustbot``` label +I-lang-nominated +T-lang
2025-05-29 04:50:46 +02:00
..
asm
Use explicit cpu in some asm and codegen tests.
2025-03-19 19:45:46 +01:00
autodiff
Update generic tests
2025-05-21 07:24:43 +00:00
auxiliary
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
avr
update/bless tests
2025-04-06 21:41:47 +02:00
bounds-checking
Simplify the GEP instruction for index
2024-12-15 19:01:45 +08:00
cffi
stabilize naked_functions
2025-04-20 11:18:38 +02:00
compiletest-self-test
tests/codegen: add minicore compiletest self-test
2024-10-31 18:20:11 +08:00
cross-crate-inlining
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
debug-accessibility
Explicitly register MSVC/NONMSVC revisions for some codegen tests
2024-12-19 20:36:51 +08:00
debuginfo-proc-macro
Update the minimum external LLVM to 19
2025-04-05 11:44:38 -07:00
dllimports
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
enum
Stabilise repr128
2025-05-28 15:14:34 +01:00
ergonomic-clones
Add codegen test to be sure we get rid of uneeded clones after monomorphization
2025-04-07 16:53:11 -03:00
float
Expose algebraic floating point intrinsics
2025-04-04 16:13:57 -07:00
hint
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
instrument-coverage
coverage: Adjust a codegen test to ignore the order of covmap/covfun globals
2024-12-11 21:34:48 +11:00
instrument-xray
…
intrinsics
Stabilize select_unpredictable
2025-05-01 13:49:28 +01:00
issues
Describe lifetime of call argument temporaries passed indirectly
2025-05-17 09:49:03 +02:00
lib-optimizations
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
loongarch-abi
tests: use minicore more
2025-02-24 09:26:54 +00:00
macos
tests: use minicore more
2025-02-24 09:26:54 +00:00
meta-filecheck
compiletest: don't register MSVC/NONMSVC FileCheck prefixes
2024-12-19 20:36:51 +08:00
naked-fn
stabilize naked_functions
2025-04-20 11:18:38 +02:00
non-terminate
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
option-niche-unfixed
tests: mark option-niche-eq as fixed on LLVM 21
2025-05-27 11:20:52 -04:00
patchable-function-entry
Updated code for changes to RFC, added additional error handling, added
2024-06-25 19:00:02 +02:00
remap_path_prefix
tests: use //@ ignore-auxiliary with backlinked primary test file
2025-04-17 19:45:28 +08:00
repr
enable msa feature for mips in codegen tests
2025-04-29 10:20:25 +02:00
riscv-abi
tests: use minicore more
2025-02-24 09:26:54 +00:00
sanitizer
KCFI: Add KCFI arity indicator support
2025-04-05 04:05:04 +00:00
simd
Fix test simd/extract-insert-dyn on s390x
2025-05-03 10:15:32 +02:00
simd-intrinsic
simd intrinsics with mask: accept unsigned integer masks
2025-04-20 12:25:27 +02:00
src-hash-algorithm
…
unwind-abis
Remove c_unwind from tests and fix tests
2024-06-19 13:54:55 +01:00
aarch64-softfloat.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
aarch64-struct-align-128.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
abi-efiapi.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
abi-main-signature-16bit-c-int.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
abi-main-signature-32bit-c-int.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
abi-repr-ext.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
abi-sysv64.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
abi-win64-zst.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
abi-x86_64_sysv.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
abi-x86-interrupt.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
abi-x86-sse.rs
x86-sse2 ABI: use SSE registers for floats and SIMD
2025-02-18 16:11:41 +01:00
addr-of-mutate.rs
LLVM changed the nocapture attribute to captures(none)
2025-01-30 11:22:46 +01:00
adjustments.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
align-byval-alignment-mismatch.rs
Describe lifetime of call argument temporaries passed indirectly
2025-05-17 09:49:03 +02:00
align-byval-vector.rs
use add-core-stubs / minicore for a few more tests
2025-02-16 18:37:50 +01:00
align-byval.rs
use add-core-stubs / minicore for a few more tests
2025-02-16 18:37:50 +01:00
align-enum.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
align-fn.rs
fix multiple #[repr(align(N))] on functions
2025-04-16 12:16:40 +02:00
align-offset.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
align-struct.rs
mitigate MSVC unsoundness by not emitting alignment attributes on win32-msvc targets
2025-04-07 23:30:55 +02:00
alloc-optimisation.rs
Remove implicit #[no_mangle] for #[rustc_std_internal_symbol]
2025-03-17 14:08:09 +00:00
amdgpu-addrspacecast.rs
Cast allocas to default address space
2025-02-10 21:38:44 +01:00
array-clone.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
array-cmp.rs
Extend the chaining logic to slices too
2025-04-12 22:10:17 -07:00
array-codegen.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
array-equality.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
array-from_fn.rs
test(std): Add codegen test for array::from_fn optimization
2024-08-10 10:44:24 +08:00
array-map.rs
use [N x i8] for alloca types
2024-04-11 21:42:35 -04:00
array-optimized.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
array-repeat.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
ascii-char.rs
codegen tests: Tolerate nuw nsw on trunc
2024-04-11 17:20:08 +00:00
assign-desugar-debuginfo.rs
Don't produce debug information for compiler-introduced-vars when desugaring assignments.
2025-03-21 17:34:45 -07:00
async-closure-debug.rs
replace //@ compile-flags: --edition with //@ edition
2025-04-10 09:56:37 +02:00
async-fn-debug-awaitee-field.rs
replace //@ compile-flags: --edition with //@ edition
2025-04-10 09:56:37 +02:00
async-fn-debug-msvc.rs
didn't catch this test failure, whoops
2025-04-11 09:57:21 +02:00
async-fn-debug.rs
replace //@ compile-flags: --edition with //@ edition
2025-04-10 09:56:37 +02:00
atomic-operations.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
atomicptr.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
autodiffv2.rs
passing test for dualv
2025-04-16 17:13:50 -04:00
autovectorize-f32x4.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
bigint-helpers.rs
Override disjoint_or in the LLVM backend
2025-01-31 22:29:08 -08:00
binary-heap-peek-mut-pop-no-panic.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
binary-search-index-no-bound-check.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
bool-cmp.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
box-default-debug-copies.rs
reduce Box::default stack copies in debug mode
2025-01-26 03:48:27 -05:00
box-uninit-bytes.rs
Remove implicit #[no_mangle] for #[rustc_std_internal_symbol]
2025-03-17 14:08:09 +00:00
bpf-alu32.rs
…
branch-protection.rs
Update the minimum external LLVM to 19
2025-04-05 11:44:38 -07:00
call-llvm-intrinsics.rs
…
call-tmps-lifetime.rs
Describe lifetime of call argument temporaries passed indirectly
2025-05-17 09:49:03 +02:00
cast-optimized.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
cast-target-abi.rs
Update the minimum external LLVM to 19
2025-04-05 11:44:38 -07:00
catch-unwind.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
cdylib-external-inline-fns.rs
…
cf-protection.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
cfguard-checks.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
cfguard-disabled.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
cfguard-nochecks.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
cfguard-non-msvc.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
char-ascii-branchless.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
char-escape-debug-no-bounds-check.rs
Add test for escape_debug without bounds check.
2025-03-06 21:38:39 +01:00
checked_ilog.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
checked_math.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
clone_as_copy.rs
Remove unsound-mir-opts for simplify_aggregate_to_copy
2025-04-03 21:59:43 +08:00
clone-shims.rs
Let InstCombine remove Clone shims inside Clone shims
2024-07-25 15:14:42 -04:00
codemodels.rs
…
coercions.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
cold-call-declare-and-call.rs
Disallow setting built-in cfgs via set the command-line
2024-08-07 14:08:34 +02:00
common_prim_int_ptr.rs
llvm: Tolerate captures in tests
2025-02-14 18:55:50 +00:00
comparison-operators-2-struct.rs
Update some comparison tests now that they pass in LLVM20
2025-02-17 16:36:14 -08:00
comparison-operators-2-tuple.rs
Lower BinOp::Cmp to llvm.{s,u}cmp.* intrinsics
2025-03-06 22:29:05 +08:00
comparison-operators-newtype.rs
Set signext or zeroext for integer arguments on RISC-V
2024-10-23 04:42:03 +02:00
const_scalar_pair.rs
Fix tests and bless
2024-04-24 13:12:33 +01:00
const-array.rs
Avoid wrapping constant allocations in packed structs when not necessary
2025-03-28 09:19:57 +00:00
const-vector.rs
Rollup merge of #140457 - fneddy:fix_s390x_codegen_const_vector, r=Mark-Simulacrum
2025-05-04 18:11:48 -04:00
constant-branch.rs
Compute reachable locals as part of non_ssa_locals
2024-09-21 01:07:00 -04:00
consts.rs
Use FileCheck to parameterize codegen tests over hashes
2024-06-04 01:30:51 -07:00
coroutine-debug-msvc.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
coroutine-debug.rs
replace //@ compile-flags: --edition with //@ edition
2025-04-10 09:56:37 +02:00
dealloc-no-unwind.rs
Remove implicit #[no_mangle] for #[rustc_std_internal_symbol]
2025-03-17 14:08:09 +00:00
debug-alignment.rs
…
debug-column-msvc.rs
…
debug-column.rs
Enable more tests on Windows
2025-02-03 10:39:32 -05:00
debug-compile-unit-path.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
debug-fndef-size.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
debug-limited.rs
…
debug-line-directives-only.rs
…
debug-line-tables-only.rs
…
debug-linkage-name.rs
…
debug-vtable.rs
Avoid wrapping constant allocations in packed structs when not necessary
2025-03-28 09:19:57 +00:00
debuginfo-constant-locals.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
debuginfo-generic-closure-env-names.rs
replace //@ compile-flags: --edition with //@ edition
2025-04-10 09:56:37 +02:00
debuginfo-inline-callsite-location.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
deduced-param-attrs.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
default-requires-uwtable.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
default-visibility.rs
Use Default visibility for rustc-generated C symbol declarations
2024-10-11 08:43:27 +11:00
direct-access-external-data.rs
…
dont_codegen_private_const_fn_only_used_in_const_eval.rs
Also support generic constants
2024-06-05 15:40:11 +00:00
dont-shuffle-bswaps.rs
Use -C target-cpu=z13 on s390x vector test
2025-04-07 09:36:56 +02:00
drop-in-place-noalias.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
drop.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
dst-offset.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
dst-vtable-align-nonzero.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
dst-vtable-size-range.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
ehcontguard_disabled.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
ehcontguard_enabled.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
emscripten-catch-unwind-js-eh.rs
update/bless tests
2025-04-06 21:41:47 +02:00
emscripten-catch-unwind-wasm-eh.rs
update/bless tests
2025-04-06 21:41:47 +02:00
enable-lto-unit-splitting.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
error-provide.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
export-no-mangle.rs
…
external-no-mangle-fns.rs
…
external-no-mangle-statics.rs
Avoid wrapping constant allocations in packed structs when not necessary
2025-03-28 09:19:57 +00:00
f128-wasm32-callconv.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
fastcall-inreg.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
fatptr.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
fewer-names.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
fixed-x18.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
float_math.rs
Expose algebraic floating point intrinsics
2025-04-04 16:13:57 -07:00
fn-impl-trait-self.rs
…
force-frame-pointers.rs
test: ignore force-frame-pointers test on some targets
2024-06-23 00:40:43 -07:00
force-no-unwind-tables.rs
Enable more tests on Windows
2025-02-03 10:39:32 -05:00
force-unwind-tables.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
frame-pointer.rs
aarch64-linux: Default to FramePointer::NonLeaf
2025-05-17 06:42:46 +02:00
function-arguments-noopt.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
function-arguments.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
function-return.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
gdb_debug_script_load.rs
remove support for the #[start] attribute
2025-01-21 06:59:15 -07:00
generic-debug.rs
reenable some windows tests
2024-07-14 13:48:29 +03:00
gep-index.rs
Also use gep inbounds nuw for index projections
2025-02-19 15:15:29 +01:00
gpu-kernel-abi.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
i128-wasm32-callconv.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
i128-x86-align.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
i128-x86-callconv.rs
x86_win64 ABI: do not use xmm0 with softfloat ABI
2025-02-19 08:41:19 +01:00
infallible-unwrap-in-opt-z.rs
replace //@ compile-flags: --edition with //@ edition
2025-04-10 09:56:37 +02:00
inherit_overflow.rs
…
inline-always-works-always.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
inline-debuginfo.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
inline-function-args-debug-info.rs
replace //@ compile-flags: --edition with //@ edition
2025-04-10 09:56:37 +02:00
inline-hint.rs
…
instrument-mcount.rs
…
integer-cmp.rs
Lower BinOp::Cmp to llvm.{s,u}cmp.* intrinsics
2025-03-06 22:29:05 +08:00
integer-overflow.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
internalize-closures.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
intrinsic-no-unnamed-attr.rs
replace some #[rustc_intrinsic] usage with use of the libcore declarations
2025-04-16 14:48:20 +02:00
is_val_statically_known.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
issue-97217.rs
Update the minimum external LLVM to 18
2024-09-18 13:53:31 -07:00
iter-repeat-n-trivial-drop.rs
Remove implicit #[no_mangle] for #[rustc_std_internal_symbol]
2025-03-17 14:08:09 +00:00
layout-size-checks.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
lifetime_start_end.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
link_section.rs
Avoid wrapping constant allocations in packed structs when not necessary
2025-03-28 09:19:57 +00:00
link-dead-code.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
llvm_module_flags.rs
…
llvm-ident.rs
…
loads.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
local-generics-in-exe-internalized.rs
…
lto-removes-invokes.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
mainsubprogram.rs
reenable some windows tests
2024-07-14 13:48:29 +03:00
match-optimized.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
match-optimizes-away.rs
Don't alloca just to look at a discriminant
2025-03-12 00:56:43 -07:00
match-unoptimized.rs
…
maybeuninit-rvo.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
mem-replace-big-type.rs
We don't need NonNull::as_ptr debuginfo
2024-12-10 01:29:43 -08:00
mem-replace-simple-type.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
merge-functions.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
method-declaration.rs
…
min-function-alignment.rs
add -Zmin-function-alignment
2025-01-10 22:53:54 +01:00
mir_zst_stores.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
mir-aggregate-no-alloca.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
mir-inlined-line-numbers.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
move-before-nocapture-ref-arg.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
move-operands.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
naked-asan.rs
stabilize naked_functions
2025-04-20 11:18:38 +02:00
no_builtins-at-crate.rs
…
no-alloca-inside-if-false.rs
Compute reachable locals as part of non_ssa_locals
2024-09-21 01:07:00 -04:00
no-assumes-on-casts.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
no-dllimport-w-cross-lang-lto.rs
…
no-jump-tables.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
no-plt.rs
…
no-redundant-item-monomorphization.rs
Port issue-7349 to a codegen test
2024-04-04 21:59:08 +01:00
noalias-box-off.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
noalias-box.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
noalias-flag.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
noalias-freeze.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
noalias-refcell.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
noalias-rwlockreadguard.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
noalias-unpin.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
noreturn-uninhabited.rs
…
noreturnflag.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
nounwind.rs
reenable some windows tests
2024-07-14 13:48:29 +03:00
nrvo.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
optimize-attr-1.rs
Implement optimize(none) attribute
2025-01-23 17:19:53 +00:00
option-as-slice.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
option-niche-eq.rs
tests: mark option-niche-eq as fixed on LLVM 21
2025-05-27 11:20:52 -04:00
overaligned-constant.rs
The embedded bitcode should always be prepared for LTO/ThinLTO
2025-02-23 21:23:36 +08:00
packed.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
panic-abort-windows.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
panic-in-drop-abort.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
panic-unwind-default-uwtable.rs
…
pattern_type_symbols.rs
Hide the end of ranges in pretty printing if it's also the maximum of the type
2025-03-06 10:50:23 +00:00
personality_lifetimes.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
pgo-counter-bias.rs
Use -Zno-profiler-runtime instead of //@ needs-profiler-support
2024-06-14 13:31:46 +10:00
pgo-instrumentation.rs
Use -Zno-profiler-runtime instead of //@ needs-profiler-support
2024-06-14 13:31:46 +10:00
pic-relocation-model.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
pie-relocation-model.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
placement-new.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
powerpc64le-struct-align-128.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
precondition-checks.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
ptr-arithmetic.rs
Emit getelementptr inbounds nuw for pointer::add()
2025-02-19 11:32:32 +01:00
ptr-read-metadata.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
range_to_inclusive.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
range-attribute.rs
Update the minimum external LLVM to 19
2025-04-05 11:44:38 -07:00
range-loop.rs
Allow more top-down inlining for single-BB callees
2025-03-12 22:39:43 -07:00
README.md
…
refs.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
reg-struct-return.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
regparm-inreg.rs
make abi_unsupported_vector_types a hard error
2025-04-20 11:34:56 +02:00
repeat-trusted-len.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
riscv-target-abi.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
rust-abi-arch-specific-adjustment.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
s390x-simd.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
scalar-pair-bool.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
set-discriminant-invalid.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
skip-mono-inside-if-false.rs
…
slice_as_from_ptr_range.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
slice-as_chunks.rs
Stabilize slice_as_chunks library feature
2025-04-10 21:07:09 -07:00
slice-indexing.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
slice-init.rs
Add a test
2025-03-02 18:53:49 +00:00
slice-is-ascii.rs
Use explicit cpu in some asm and codegen tests.
2025-03-19 19:45:46 +01:00
slice-iter-fold.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
slice-iter-len-eq-zero.rs
transmute should also assume non-null pointers
2025-02-12 23:01:27 -08:00
slice-iter-nonnull.rs
Simplify slice::Iter::next enough that it inlines
2025-02-14 22:24:27 -08:00
slice-last-elements-optimization.rs
Add tests for LLVM 20 slice bounds check optimization
2025-03-31 22:38:53 +09:00
slice-pointer-nonnull-unwrap.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
slice-position-bounds-check.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
slice-ref-equality.rs
Set both nuw and nsw in slice size calculation
2025-02-13 21:26:48 -08:00
slice-reverse.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
slice-split-at.rs
slice: Remove some uses of unsafe in first/last chunk methods
2025-03-30 12:45:04 -04:00
slice-windows-no-bounds-check.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
some-abis-do-extend-params-to-32-bits.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
some-global-nonnull.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
sparc-struct-abi.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
split-lto-unit.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
sroa-fragment-debuginfo.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
sse42-implies-crc32.rs
Fix codegen tests
2024-08-07 00:41:48 -04:00
stack-probes-inline.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
stack-protector.rs
…
static-relocation-model-msvc.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
staticlib-external-inline-fns.rs
…
step_by-overflow-checks.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
stores.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
string-push.rs
Speed up String::push and String::insert
2025-04-09 13:06:10 +03:00
swap-large-types.rs
Ensure swap_nonoverlapping is really always untyped
2025-04-09 09:09:37 -07:00
swap-small-types.rs
skip tests/codegen/swap-small-types when debug assertions are on
2025-04-09 10:44:49 -07:00
target-cpu-on-functions.rs
…
target-feature-inline-closure.rs
Fix target-feature inline test to be less flaky
2025-03-06 19:56:21 +00:00
target-feature-overrides.rs
tests: use minicore more
2025-02-24 09:26:54 +00:00
terminating-catchpad.rs
Generate correct terminate block under Wasm EH
2025-02-06 18:21:13 +03:00
thread-local.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
tied-features-strength.rs
Update the minimum external LLVM to 19
2025-04-05 11:44:38 -07:00
to_vec.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
trailing_zeros.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
transmute-optimized.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
transmute-scalar.rs
Emit trunc nuw for unchecked shifts and to_immediate_scalar
2025-02-19 11:36:52 -08:00
try_question_mark_nop.rs
replace //@ compile-flags: --edition with //@ edition
2025-04-10 09:56:37 +02:00
tune-cpu-on-functions.rs
Run rustfmt on tests/codegen/.
2024-05-31 15:56:43 +10:00
tuple-layout-opt.rs
Fix test expectations for 32bit x86
2024-10-19 13:09:21 +00:00
ub-checks.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
unchecked_shifts.rs
Update the minimum external LLVM to 19
2025-04-05 11:44:38 -07:00
unchecked-float-casts.rs
…
uninhabited-transparent-return-abi.rs
tests: fix up new test for nocapture -> capture(none) change
2025-02-25 17:46:05 -05:00
uninit-consts.rs
Avoid wrapping constant allocations in packed structs when not necessary
2025-03-28 09:19:57 +00:00
uninit-repeat-in-aggregate.rs
Lower to a memset(undef) when Rvalue::Repeat repeats uninit
2025-03-19 23:57:49 -04:00
union-abi.rs
Emit trunc nuw for unchecked shifts and to_immediate_scalar
2025-02-19 11:36:52 -08:00
unwind-and-panic-abort.rs
Remove c_unwind from tests and fix tests
2024-06-19 13:54:55 +01:00
unwind-extern-exports.rs
Remove c_unwind from tests and fix tests
2024-06-19 13:54:55 +01:00
unwind-extern-imports.rs
Remove c_unwind from tests and fix tests
2024-06-19 13:54:55 +01:00
unwind-landingpad-cold.rs
Update the minimum external LLVM to 18
2024-09-18 13:53:31 -07:00
unwind-landingpad-inline.rs
Update the minimum external LLVM to 18
2024-09-18 13:53:31 -07:00
used_with_arg.rs
…
var-names.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vec_pop_push_noop.rs
Update the minimum external LLVM to 19
2025-04-05 11:44:38 -07:00
vec-as-ptr.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vec-calloc.rs
Remove implicit #[no_mangle] for #[rustc_std_internal_symbol]
2025-03-17 14:08:09 +00:00
vec-in-place.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vec-iter-collect-len.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vec-iter.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vec-len-invariant.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vec-optimizes-away.rs
Remove implicit #[no_mangle] for #[rustc_std_internal_symbol]
2025-03-17 14:08:09 +00:00
vec-reserve-extend.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vec-shrink-panik.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vec-with-capacity.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vecdeque_no_panic.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vecdeque_pop_push.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vecdeque-drain.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vecdeque-nonempty-get-no-panic.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
virtual-call-attrs-issue-137646.rs
Don't infer unwinding of virtual calls based on the function attributes
2025-02-27 12:58:18 +08:00
virtual-function-elimination-32bit.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
virtual-function-elimination.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vtable-loads.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
vtable-upcast.rs
remove feature(trait_upcasting) from tests and bless them
2025-02-06 23:44:23 +01:00
wasm_casts_trapping.rs
…
wasm_exceptions.rs
Fix tests/codegen/wasm_exceptions
2025-01-28 19:10:26 +03:00
zip.rs
tests/codegen: use -Copt-level=3 instead of -O
2025-02-11 13:41:35 -08:00
zst-offset.rs
Ban non-array SIMD
2024-09-09 19:39:43 -07:00

README.md

The files here use the LLVM FileCheck framework, documented at https://llvm.org/docs/CommandGuide/FileCheck.html.

One extension worth noting is the use of revisions as custom prefixes for FileCheck. If your codegen test has different behavior based on the chosen target or different compiler flags that you want to exercise, you can use a revisions annotation, like so:

// revisions: aaa bbb
// [bbb] compile-flags: --flags-for-bbb

After specifying those variations, you can write different expected, or explicitly unexpected output by using <prefix>-SAME: and <prefix>-NOT:, like so:

// CHECK: expected code
// aaa-SAME: emitted-only-for-aaa
// aaa-NOT:                        emitted-only-for-bbb
// bbb-NOT:  emitted-only-for-aaa
// bbb-SAME:                       emitted-only-for-bbb