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Trevor Gross 6fa6a854cd Rollup merge of #144192 - RalfJung:atomicrmw-ptr, r=nikic 
atomicrmw on pointers: move integer-pointer cast hacks into backend

Conceptually, we want to have atomic operations on pointers of the form `fn atomic_add(ptr: *mut T, offset: usize, ...)`. However, LLVM does not directly support such operations (https://github.com/llvm/llvm-project/issues/120837), so we have to cast the `offset` to a pointer somewhere.

This PR moves that hack into the LLVM backend, so that the standard library, intrinsic, and Miri all work with the conceptual operation we actually want. Hopefully, one day LLVM will gain a way to represent these operations without integer-pointer casts, and then the hack will disappear entirely.

Cc ```@nikic``` -- this is the best we can do right now, right?
Fixes https://github.com/rust-lang/rust/issues/134617
2025-08-08 14:22:44 -05:00
..
asm
Rename tests/codegen into tests/codegen-llvm
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autodiff
Rename tests/codegen into tests/codegen-llvm
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autovec
Rename tests/codegen into tests/codegen-llvm
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auxiliary
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avr
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bounds-checking
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
cffi
add codegen test for variadics (also replacing some existing does-this-build tests)
2025-07-23 14:19:14 +02:00
compiletest-self-test
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
cross-crate-inlining
Rename tests/codegen into tests/codegen-llvm
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debug-accessibility
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debuginfo-proc-macro
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dllimports
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enum
[codegen] assume the tag, not the relative discriminant
2025-08-06 09:11:35 -07:00
ergonomic-clones
Rename tests/codegen into tests/codegen-llvm
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float
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gpu_offload
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hint
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instrument-coverage
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instrument-xray
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intrinsics
Auto merge of #143860 - scottmcm:transmute-always-rvalue, r=WaffleLapkin
2025-07-26 22:45:18 +00:00
issues
Rename tests/codegen into tests/codegen-llvm
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lib-optimizations
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loongarch-abi
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macos
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meta-filecheck
Rename tests/codegen into tests/codegen-llvm
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naked-fn
Verify llvm-needs-components are not empty and match the --target value
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non-terminate
Rename tests/codegen into tests/codegen-llvm
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option-niche-unfixed
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patchable-function-entry
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remap_path_prefix
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repr
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riscv-abi
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sanitizer
Prevent name collisions with internal implementation details
2025-08-07 13:41:17 +00:00
simd
Fix tests/codegen-llvm/simd/extract-insert-dyn.rs test failure on riscv64
2025-07-28 11:58:38 +00:00
simd-intrinsic
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src-hash-algorithm
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unwind-abis
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aarch64-softfloat.rs
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aarch64-struct-align-128.rs
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abi-efiapi.rs
Verify llvm-needs-components are not empty and match the --target value
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abi-main-signature-16bit-c-int.rs
Rename tests/codegen into tests/codegen-llvm
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abi-main-signature-32bit-c-int.rs
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abi-repr-ext.rs
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abi-sysv64.rs
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abi-win64-zst.rs
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abi-x86_64_sysv.rs
Rename tests/codegen into tests/codegen-llvm
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abi-x86-interrupt.rs
Rename tests/codegen into tests/codegen-llvm
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abi-x86-sse.rs
Rename tests/codegen into tests/codegen-llvm
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addr-of-mutate.rs
Rename tests/codegen into tests/codegen-llvm
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adjustments.rs
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align-byval-alignment-mismatch.rs
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align-byval-vector.rs
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align-byval.rs
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align-enum.rs
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align-fn.rs
Rename tests/codegen into tests/codegen-llvm
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align-offset.rs
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align-struct.rs
Rename tests/codegen into tests/codegen-llvm
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alloc-optimisation.rs
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amdgpu-addrspacecast.rs
Rename tests/codegen into tests/codegen-llvm
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array-clone.rs
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array-cmp.rs
Rename tests/codegen into tests/codegen-llvm
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array-codegen.rs
Rename tests/codegen into tests/codegen-llvm
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array-equality.rs
Rename tests/codegen into tests/codegen-llvm
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array-from_fn.rs
Rename tests/codegen into tests/codegen-llvm
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array-map.rs
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array-optimized.rs
Rename tests/codegen into tests/codegen-llvm
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array-repeat.rs
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ascii-char.rs
Rename tests/codegen into tests/codegen-llvm
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assign-desugar-debuginfo.rs
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async-closure-debug.rs
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async-fn-debug-awaitee-field.rs
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async-fn-debug-msvc.rs
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async-fn-debug.rs
Rename tests/codegen into tests/codegen-llvm
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atomic-operations.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
atomicptr.rs
atomicrmw on pointers: move integer-pointer cast hacks into backend
2025-07-23 08:32:55 +02:00
autodiffv2.rs
Rename tests/codegen into tests/codegen-llvm
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autovectorize-f32x4.rs
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2025-07-22 14:28:48 +02:00
become-musttail.rs
Implement support for explicit tail calls in the MIR block builders and the LLVM codegen backend.
2025-07-26 01:02:29 +02:00
bigint-helpers.rs
Rename tests/codegen into tests/codegen-llvm
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binary-heap-peek-mut-pop-no-panic.rs
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binary-search-index-no-bound-check.rs
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bool-cmp.rs
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bounds-check-elision-slice-min.rs
Multiple bounds checking elision failures
2025-08-01 18:38:22 +01:00
box-default-debug-copies.rs
Rename tests/codegen into tests/codegen-llvm
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box-uninit-bytes.rs
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bpf-alu32.rs
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branch-protection.rs
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call-llvm-intrinsics.rs
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call-tmps-lifetime.rs
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cast-optimized.rs
Rename tests/codegen into tests/codegen-llvm
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cast-target-abi.rs
Verify llvm-needs-components are not empty and match the --target value
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catch-unwind.rs
Rename tests/codegen into tests/codegen-llvm
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cdylib-external-inline-fns.rs
Rename tests/codegen into tests/codegen-llvm
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cf-protection.rs
Verify llvm-needs-components are not empty and match the --target value
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cfguard-checks.rs
Rename tests/codegen into tests/codegen-llvm
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cfguard-disabled.rs
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cfguard-nochecks.rs
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cfguard-non-msvc.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
char-ascii-branchless.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
char-escape-debug-no-bounds-check.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
checked_ilog.rs
Rename tests/codegen into tests/codegen-llvm
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checked_math.rs
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clone_as_copy.rs
Rename tests/codegen into tests/codegen-llvm
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clone-shims.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
codemodels.rs
Verify llvm-needs-components are not empty and match the --target value
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coercions.rs
Rename tests/codegen into tests/codegen-llvm
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cold-call-declare-and-call.rs
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common_prim_int_ptr.rs
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comparison-operators-2-struct.rs
Rename tests/codegen into tests/codegen-llvm
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comparison-operators-2-tuple.rs
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comparison-operators-newtype.rs
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const_scalar_pair.rs
Rename tests/codegen into tests/codegen-llvm
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const-array.rs
Rename tests/codegen into tests/codegen-llvm
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const-vector.rs
Fix tests/codegen-llvm/const-vector.rs test failure on riscv64
2025-07-23 11:23:36 +00:00
constant-branch.rs
Rename tests/codegen into tests/codegen-llvm
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consts.rs
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coroutine-debug-msvc.rs
Rename tests/codegen into tests/codegen-llvm
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coroutine-debug.rs
Rename tests/codegen into tests/codegen-llvm
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dealloc-no-unwind.rs
Rename tests/codegen into tests/codegen-llvm
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debug-alignment.rs
Rename tests/codegen into tests/codegen-llvm
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debug-column-msvc.rs
Rename tests/codegen into tests/codegen-llvm
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debug-column.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
debug-compile-unit-path.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
debug-fndef-size.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
debug-limited.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
debug-line-directives-only.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
debug-line-tables-only.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
debug-linkage-name.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
debug-vtable.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
debuginfo-constant-locals.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
debuginfo-cyclic-structure.rs
fix(debuginfo): disable overflow check for
2025-07-27 14:42:07 +03:00
debuginfo-generic-closure-env-names.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
debuginfo-inline-callsite-location.rs
Rename tests/codegen into tests/codegen-llvm
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deduced-param-attrs.rs
Rename tests/codegen into tests/codegen-llvm
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default-requires-uwtable.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
default-visibility.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
direct-access-external-data.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
diverging-function-call-debuginfo.rs
tests: Test line number in debuginfo for diverging function calls
2025-07-29 18:59:09 +02:00
dont_codegen_private_const_fn_only_used_in_const_eval.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
drop-in-place-noalias.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
drop.rs
Rename tests/codegen into tests/codegen-llvm
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dst-offset.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
dst-vtable-align-nonzero.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
dst-vtable-size-range.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
ehcontguard_disabled.rs
Verify llvm-needs-components are not empty and match the --target value
2025-07-29 11:20:23 -07:00
ehcontguard_enabled.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
emscripten-catch-unwind-js-eh.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
emscripten-catch-unwind-wasm-eh.rs
Rename tests/codegen into tests/codegen-llvm
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enable-lto-unit-splitting.rs
Rename tests/codegen into tests/codegen-llvm
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error-provide.rs
Rename tests/codegen into tests/codegen-llvm
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export-no-mangle.rs
Rename tests/codegen into tests/codegen-llvm
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external-no-mangle-fns.rs
Rename tests/codegen into tests/codegen-llvm
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external-no-mangle-statics.rs
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f128-wasm32-callconv.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
fastcall-inreg.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
fatptr.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
fewer-names.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
fixed-x18.rs
Rename tests/codegen into tests/codegen-llvm
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float_math.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
fn-impl-trait-self.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
fn-parameters-on-different-lines-debuginfo.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
force-frame-pointers.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
force-no-unwind-tables.rs
Rename tests/codegen into tests/codegen-llvm
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force-unwind-tables.rs
Rename tests/codegen into tests/codegen-llvm
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frame-pointer-cli-control.rs
Rename tests/codegen into tests/codegen-llvm
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frame-pointer.rs
Rename tests/codegen into tests/codegen-llvm
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function-arguments-noopt.rs
Rename tests/codegen into tests/codegen-llvm
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function-arguments.rs
Rename tests/codegen into tests/codegen-llvm
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function-return.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
gdb_debug_script_load.rs
Revert "Preserve the .debug_gdb_scripts section"
2025-08-06 18:01:07 +00:00
generic-debug.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
gep-index.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
gpu-kernel-abi.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
i128-wasm32-callconv.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
i128-x86-align.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
i128-x86-callconv.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
infallible-unwrap-in-opt-z.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
inherit_overflow.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
inline-always-works-always.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
inline-debuginfo.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
inline-function-args-debug-info.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
inline-hint.rs
Rename tests/codegen into tests/codegen-llvm
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instrument-mcount.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
integer-cmp.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
integer-overflow.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
internalize-closures.rs
Rename tests/codegen into tests/codegen-llvm
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intrinsic-no-unnamed-attr.rs
Rename tests/codegen into tests/codegen-llvm
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is_val_statically_known.rs
Rename tests/codegen into tests/codegen-llvm
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issue-97217.rs
Rename tests/codegen into tests/codegen-llvm
2025-07-22 14:28:48 +02:00
iter-repeat-n-trivial-drop.rs
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2025-07-22 14:28:48 +02:00
layout-size-checks.rs
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2025-07-22 14:28:48 +02:00
lifetime_start_end.rs
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2025-07-22 14:28:48 +02:00
link_section.rs
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link-dead-code.rs
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2025-07-22 14:28:48 +02:00
llvm_module_flags.rs
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2025-07-22 14:28:48 +02:00
llvm-ident.rs
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2025-07-22 14:28:48 +02:00
loads.rs
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local-generics-in-exe-internalized.rs
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2025-07-22 14:28:48 +02:00
lto-removes-invokes.rs
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mainsubprogram.rs
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match-optimized.rs
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match-optimizes-away.rs
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match-unoptimized.rs
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maybeuninit-rvo.rs
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mem-replace-big-type.rs
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mem-replace-simple-type.rs
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merge-functions.rs
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method-declaration.rs
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min-function-alignment.rs
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mir_zst_stores.rs
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mir-aggregate-no-alloca.rs
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mir-inlined-line-numbers.rs
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move-before-nocapture-ref-arg.rs
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move-operands.rs
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naked-asan.rs
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no_builtins-at-crate.rs
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no-alloca-inside-if-false.rs
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no-assumes-on-casts.rs
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no-dllimport-w-cross-lang-lto.rs
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no-jump-tables.rs
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no-plt.rs
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no-redundant-item-monomorphization.rs
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noalias-box-off.rs
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noalias-box.rs
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noalias-flag.rs
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noalias-freeze.rs
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noalias-refcell.rs
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noalias-rwlockreadguard.rs
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noalias-unpin.rs
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noreturn-uninhabited.rs
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noreturnflag.rs
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nounwind.rs
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nrvo.rs
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optimize-attr-1.rs
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option-as-slice.rs
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option-niche-eq.rs
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overaligned-constant.rs
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packed.rs
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panic-abort-windows.rs
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panic-in-drop-abort.rs
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panic-unwind-default-uwtable.rs
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pattern_type_symbols.rs
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personality_lifetimes.rs
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pgo-counter-bias.rs
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pgo-instrumentation.rs
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pic-relocation-model.rs
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pie-relocation-model.rs
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placement-new.rs
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powerpc64le-struct-align-128.rs
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precondition-checks.rs
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ptr-arithmetic.rs
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ptr-read-metadata.rs
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range_to_inclusive.rs
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range-attribute.rs
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range-loop.rs
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README.md
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refs.rs
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reg-struct-return.rs
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regparm-inreg.rs
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repeat-operand-zero-len.rs
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repeat-operand-zst-elem.rs
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repeat-trusted-len.rs
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retpoline.rs
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riscv-target-abi.rs
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rust-abi-arch-specific-adjustment.rs
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s390x-simd.rs
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scalar-pair-bool.rs
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set-discriminant-invalid.rs
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skip-mono-inside-if-false.rs
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slice_as_from_ptr_range.rs
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slice-as_chunks.rs
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slice-indexing.rs
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slice-init.rs
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slice-is-ascii.rs
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slice-iter-fold.rs
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slice-iter-len-eq-zero.rs
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slice-iter-nonnull.rs
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slice-last-elements-optimization.rs
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slice-pointer-nonnull-unwrap.rs
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slice-position-bounds-check.rs
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slice-ref-equality.rs
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slice-reverse.rs
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slice-split-at.rs
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slice-windows-no-bounds-check.rs
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some-abis-do-extend-params-to-32-bits.rs
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some-global-nonnull.rs
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sparc-struct-abi.rs
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split-lto-unit.rs
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sroa-fragment-debuginfo.rs
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sse42-implies-crc32.rs
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stack-probes-inline.rs
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stack-protector.rs
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static-relocation-model-msvc.rs
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staticlib-external-inline-fns.rs
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step_by-overflow-checks.rs
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stores.rs
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string-push.rs
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swap-large-types.rs
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swap-small-types.rs
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target-cpu-on-functions.rs
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target-feature-inline-closure.rs
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target-feature-negative-implication.rs
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target-feature-overrides.rs
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terminating-catchpad.rs
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thread-local.rs
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tied-features-strength.rs
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to_vec.rs
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trailing_zeros.rs
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transmute-optimized.rs
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transmute-scalar.rs
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try_question_mark_nop.rs
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tune-cpu-on-functions.rs
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tuple-layout-opt.rs
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ub-checks.rs
Verify llvm-needs-components are not empty and match the --target value
2025-07-29 11:20:23 -07:00
unchecked_shifts.rs
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unchecked-float-casts.rs
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uninhabited-transparent-return-abi.rs
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uninit-consts.rs
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uninit-repeat-in-aggregate.rs
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union-abi.rs
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union-aggregate.rs
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unwind-and-panic-abort.rs
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unwind-extern-exports.rs
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unwind-extern-imports.rs
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unwind-landingpad-cold.rs
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unwind-landingpad-inline.rs
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used_with_arg.rs
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var-names.rs
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vec_pop_push_noop.rs
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vec-as-ptr.rs
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vec-calloc.rs
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vec-in-place.rs
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vec-iter-collect-len.rs
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vec-iter.rs
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vec-len-invariant.rs
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vec-optimizes-away.rs
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vec-reserve-extend.rs
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vec-shrink-panik.rs
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vec-with-capacity.rs
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vecdeque_no_panic.rs
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vecdeque_pop_push.rs
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vecdeque-drain.rs
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vecdeque-nonempty-get-no-panic.rs
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virtual-call-attrs-issue-137646.rs
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virtual-function-elimination-32bit.rs
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virtual-function-elimination.rs
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vtable-loads.rs
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vtable-upcast.rs
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wasm_casts_trapping.rs
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wasm_exceptions.rs
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2025-07-23 02:17:54 +03:00
zip.rs
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zst-offset.rs
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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
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