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bors f45631b10f Auto merge of #116892 - ojeda:rethunk, r=wesleywiser 
Add `-Zfunction-return={keep,thunk-extern}` option

This is intended to be used for Linux kernel RETHUNK builds.

With this commit (optionally backported to Rust 1.73.0), plus a patched Linux kernel to pass the flag, I get a RETHUNK build with Rust enabled that is `objtool`-warning-free and is able to boot in QEMU and load a sample Rust kernel module.

Issue: https://github.com/rust-lang/rust/issues/116853.
2023-11-30 22:10:30 +00:00
..
auxiliary
Also move the auxiliary file
2023-03-20 10:25:29 +00:00
avr
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
cffi
tests/codegen/c-variadic* -> cffi/c-variadic*
2023-07-29 18:34:41 -07:00
cross-crate-inlining
Add -Zcross-crate-inline-threshold=yes
2023-11-07 18:45:11 -05:00
dllimports
Add more codegen tests
2023-01-17 16:23:22 +01:00
enum
tests/codegen/enum-* -> enum/enum-*
2023-07-29 18:34:41 -07:00
instrument-xray
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
intrinsics
Add a new compare_bytes intrinsic instead of calling memcmp directly
2023-08-06 15:47:40 -07:00
issues
Update the minimum external LLVM to 16.
2023-11-21 22:40:16 +01:00
lib-optimizations
restrict test to x86-64
2023-09-02 13:42:58 +02:00
loongarch-abi
tests: Fix tests for LoongArch64
2023-08-18 14:56:53 +08:00
macos
Raise minimum supported macOS to 10.12
2023-09-23 19:14:25 -05:00
naked-fn
tests/codegen/naked-* -> naked-fn/naked-*
2023-07-29 18:34:41 -07:00
non-terminate
…
remap_path_prefix
Give the cross-crate generic some work to do
2023-04-07 15:46:45 -04:00
repr
add support for rustc_abi(assert_eq) and use it to test some repr(transparent) cases
2023-09-07 09:14:29 +02:00
riscv-abi
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
sanitizer
Update the minimum external LLVM to 16.
2023-11-21 22:40:16 +01:00
simd
Emit #[inline] on derive(Debug)
2023-11-09 10:40:55 -05:00
simd-intrinsic
cg_llvm: simplify llvm.masked.gather/scatter naming with opaque pointers
2023-07-29 16:56:27 -04:00
src-hash-algorithm
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
unwind-abis
stabilize abi_thiscall
2023-08-07 14:11:03 +02:00
aarch64-struct-align-128.rs
aarch64-linux: properly handle 128bit aligned aggregates
2023-07-10 19:19:40 -04:00
abi-efiapi.rs
Stabilize abi_efiapi feature
2023-01-11 20:42:13 -05:00
abi-main-signature-16bit-c-int.rs
Replace ignore-everything with only-arch
2023-07-29 15:49:07 -07:00
abi-main-signature-32bit-c-int.rs
Ignore an AVR-inapplicable test
2023-07-29 15:21:49 -07:00
abi-repr-ext.rs
…
abi-sysv64.rs
Add more codegen tests
2023-01-17 16:23:22 +01:00
abi-x86_64_sysv.rs
…
abi-x86-interrupt.rs
Add more codegen tests
2023-01-17 16:23:22 +01:00
addr-of-mutate.rs
Update the minimum external LLVM to 15
2023-07-27 14:07:08 -07:00
adjustments.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
align-byval-vector.rs
implement vector-containing aggregate alignment for x86 darwin
2023-07-10 19:19:36 -04:00
align-byval.rs
i686-windows: make requested alignment > 4 special case apply transitively
2023-07-14 17:48:13 -04:00
align-enum.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
align-fn.rs
Allow all associated functions and add test
2023-04-16 06:31:08 +00:00
align-offset.rs
Update the minimum external LLVM to 15
2023-07-27 14:07:08 -07:00
align-struct.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
alloc-optimisation.rs
Prevent insta-stable no alloc shim support
2023-05-11 14:35:09 +00:00
array-clone.rs
…
array-codegen.rs
Copy 1-element arrays as scalars, not vectors
2023-10-07 00:10:32 -07:00
array-equality.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
array-map.rs
update array-map test for removed alloca
2023-07-10 19:19:35 -04:00
array-optimized.rs
Copy 1-element arrays as scalars, not vectors
2023-10-07 00:10:32 -07:00
ascii-char.rs
update test for new LLVM 18 codegen
2023-11-28 12:10:59 +00:00
asm-clobber_abi.rs
…
asm-clobbers.rs
…
asm-may_unwind.rs
…
asm-maybe-uninit.rs
Allow MaybeUninit in input and output of inline assembly
2023-08-23 21:57:18 +09:00
asm-multiple-options.rs
…
asm-options.rs
…
asm-powerpc-clobbers.rs
…
asm-sanitize-llvm.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
asm-target-clobbers.rs
…
async-fn-debug-awaitee-field.rs
s/generator/coroutine/
2023-10-20 21:14:01 +00:00
async-fn-debug-msvc.rs
s/generator/coroutine/
2023-10-20 21:14:01 +00:00
async-fn-debug.rs
…
atomic-operations.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
autovectorize-f32x4.rs
Test from_fn autovectorizes
2023-05-30 20:45:40 -07:00
binary-search-index-no-bound-check.rs
Stop checking for the absense of something that doesn't exist
2023-05-12 21:59:26 -07:00
bool-cmp.rs
…
box-uninit-bytes.rs
add regression test for not memcpying padding bytes
2023-08-22 15:10:56 +02:00
bpf-alu32.rs
…
branch-protection.rs
…
call-llvm-intrinsics.rs
tests: Add tests for LoongArch64
2023-04-30 00:06:26 +08:00
call-metadata.rs
codegen: allow extra attributes to functions when panic=abort
2023-05-23 16:54:30 +02:00
catch-unwind.rs
tests: Add tests for LoongArch64
2023-04-30 00:06:26 +08:00
cdylib-external-inline-fns.rs
…
cf-protection.rs
…
cfguard-checks.rs
…
cfguard-disabled.rs
…
cfguard-nochecks.rs
…
cfguard-non-msvc.rs
…
char-ascii-branchless.rs
Refactor some char, u8 ascii functions to be branchless
2023-10-26 21:48:36 -04:00
codemodels.rs
…
coercions.rs
…
cold-call-declare-and-call.rs
Use preserve_mostcc for extern "rust-cold"
2023-08-26 17:42:59 -07:00
comparison-operators-2-tuple.rs
Update the minimum external LLVM to 15
2023-07-27 14:07:08 -07:00
comparison-operators-newtype.rs
Update the minimum external LLVM to 15
2023-07-27 14:07:08 -07:00
const_scalar_pair.rs
Explain the reason for why a test exists
2023-05-31 14:07:16 +00:00
consts.rs
Update the minimum external LLVM to 15
2023-07-27 14:07:08 -07:00
coroutine-debug-msvc.rs
Rename lots of files that had generator in their name
2023-10-20 21:14:02 +00:00
coroutine-debug.rs
Rename lots of files that had generator in their name
2023-10-20 21:14:02 +00:00
dealloc-no-unwind.rs
…
debug-alignment.rs
…
debug-column-msvc.rs
…
debug-column.rs
codegen: allow extra attributes to functions when panic=abort
2023-05-23 16:54:30 +02:00
debug-compile-unit-path.rs
…
debug-fndef-size.rs
Ignore MSVC in test.
2023-10-08 16:45:45 +00:00
debug-limited.rs
More in-depth documentation for the new debuginfo options
2023-03-31 07:28:39 -04:00
debug-line-directives-only.rs
More in-depth documentation for the new debuginfo options
2023-03-31 07:28:39 -04:00
debug-line-tables-only.rs
More in-depth documentation for the new debuginfo options
2023-03-31 07:28:39 -04:00
debug-linkage-name.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
debug-vtable.rs
Fix test
2023-05-11 14:35:10 +00:00
debuginfo-constant-locals.rs
Turn on ConstDebugInfo pass.
2023-04-22 23:41:48 +02:00
debuginfo-generic-closure-env-names.rs
…
debuginfo-inline-callsite-location.rs
Deduplicate inlined function debug info, but create a new lexical scope to child subsequent scopes and variables from colliding
2023-09-01 14:27:21 -07:00
deduced-param-attrs.rs
…
default-requires-uwtable.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
drop-in-place-noalias.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
drop.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
dst-vtable-align-nonzero.rs
…
dst-vtable-size-range.rs
…
ehcontguard_disabled.rs
Add support for generating the EHCont section
2023-11-21 13:41:23 -08:00
ehcontguard_enabled.rs
convert ehcont-guard to an unstable option
2023-11-21 14:24:23 -08:00
enable-lto-unit-splitting.rs
Add cross-language LLVM CFI support to the Rust compiler
2023-05-03 22:41:29 +00:00
export-no-mangle.rs
…
external-no-mangle-fns.rs
…
external-no-mangle-statics.rs
codegen: allow the dso_local attribute
2023-05-23 16:54:33 +02:00
fastcall-inreg.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
fatptr.rs
…
fewer-names.rs
Always name the return place.
2023-07-08 15:38:40 +02:00
float_math.rs
…
fn-impl-trait-self.rs
…
foo.s
…
force-frame-pointers.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
force-no-unwind-tables.rs
…
force-unwind-tables.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
frame-pointer.rs
Add more codegen tests
2023-01-17 16:23:22 +01:00
function-arguments-noopt.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
function-arguments.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
function-return.rs
Add -Zfunction-return={keep,thunk-extern} option
2023-11-30 20:21:31 +01:00
gdb_debug_script_load.rs
…
generic-debug.rs
…
global_asm_include.rs
Replace ignore-everything with only-arch
2023-07-29 15:49:07 -07:00
global_asm_x2.rs
Replace ignore-everything with only-arch
2023-07-29 15:49:07 -07:00
global_asm.rs
Replace ignore-everything with only-arch
2023-07-29 15:49:07 -07:00
inherit_overflow.rs
inherit_overflow: adapt pattern to also work with v0 mangling
2023-03-15 14:22:26 -04:00
inline-always-works-always.rs
…
inline-debuginfo.rs
…
inline-function-args-debug-info.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
inline-hint.rs
Permit MIR inlining without #[inline]
2023-04-07 15:46:43 -04:00
instrument-coverage-off.rs
coverage: Add UI tests for values accepted by -Cinstrument-coverage
2023-10-23 17:41:40 +11:00
instrument-coverage.rs
coverage: Add UI tests for values accepted by -Cinstrument-coverage
2023-10-23 17:41:40 +11:00
instrument-mcount.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
integer-cmp.rs
…
integer-overflow.rs
…
internalize-closures.rs
…
intrinsic-no-unnamed-attr.rs
…
issue-97217.rs
Limit to LLVM 17.0.2 to work around WinEH codegen bug
2023-10-02 11:06:38 +02:00
iter-repeat-n-trivial-drop.rs
Get !nonnull metadata consistently in slice iterators, without needing assumes
2023-07-20 11:33:49 -07:00
layout-size-checks.rs
…
lifetime_start_end.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
link_section.rs
codegen: allow the dso_local attribute
2023-05-23 16:54:33 +02:00
link-dead-code.rs
…
llvm_module_flags.rs
Add -Z llvm_module_flag
2023-11-11 19:48:47 -08:00
llvm-ident.rs
Support .comment section like GCC/Clang (!llvm.ident)
2023-07-21 22:01:50 +02:00
loads.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
local-generics-in-exe-internalized.rs
Permit MIR inlining without #[inline]
2023-04-07 15:46:43 -04:00
lto-removes-invokes.rs
…
mainsubprogram.rs
…
mainsubprogramstart.rs
…
match-optimized.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
match-optimizes-away.rs
…
match-unoptimized.rs
…
mem-replace-big-type.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
mem-replace-simple-type.rs
Stop emitting non-power-of-two vectors in basic LLVM codegen
2023-08-25 20:06:57 -07:00
merge-functions.rs
Update the minimum external LLVM to 14
2023-02-10 16:06:25 -08:00
method-declaration.rs
Add test for method debuginfo declaration.
2023-08-12 21:27:46 +08:00
mir_zst_stores.rs
…
mir-inlined-line-numbers.rs
codegen: allow extra attributes to functions when panic=abort
2023-05-23 16:54:30 +02:00
move-before-nocapture-ref-arg.rs
add codegen test for #107436
2023-08-26 18:14:47 +09:00
move-operands.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
no_builtins-at-crate.rs
Add the no-builtins attribute to functions when no_builtins is applied at the crate level.
2023-07-18 22:15:47 +08:00
no-assumes-on-casts.rs
…
no-dllimport-w-cross-lang-lto.rs
…
no-jump-tables.rs
…
no-plt.rs
…
noalias-box-off.rs
make noalias-box-off filecheck more precise
2023-05-20 19:41:28 -04:00
noalias-box.rs
…
noalias-flag.rs
…
noalias-refcell.rs
…
noalias-rwlockreadguard.rs
…
noalias-unpin.rs
…
noreturn-uninhabited.rs
…
noreturnflag.rs
…
nounwind.rs
…
nrvo.rs
Disable nrvo mir opt
2023-05-08 03:55:41 -07:00
optimize-attr-1.rs
typos
2023-04-17 09:16:07 +02:00
option-as-slice.rs
ci: add a runner for vanilla LLVM 16
2023-04-16 11:50:20 -07:00
option-nonzero-eq.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
packed.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
panic-abort-windows.rs
…
panic-in-drop-abort.rs
…
panic-unwind-default-uwtable.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
personality_lifetimes.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
pgo-counter-bias.rs
…
pgo-instrumentation.rs
…
pic-relocation-model.rs
Add more codegen tests
2023-01-17 16:23:22 +01:00
pie-relocation-model.rs
Add more codegen tests
2023-01-17 16:23:22 +01:00
ptr-arithmetic.rs
Tell LLVM that the negation in <*const T>::sub cannot overflow
2023-08-10 23:00:39 -07:00
ptr-read-metadata.rs
codegen: allow the dso_local attribute
2023-05-23 16:54:33 +02:00
README.md
…
refs.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
repeat-trusted-len.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
scalar-pair-bool.rs
Put noundef on all scalars that don't allow uninit
2023-01-17 08:14:35 +01:00
set-discriminant-invalid.rs
…
slice_as_from_ptr_range.rs
Update the minimum external LLVM to 15
2023-07-27 14:07:08 -07:00
slice-as_chunks.rs
update tests that are ignored by debug
2023-09-01 04:01:54 +08:00
slice-indexing.rs
Use nuw when calculating slice lengths from Ranges
2023-03-05 15:15:22 -08:00
slice-init.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
slice-iter-fold.rs
Update the minimum external LLVM to 16.
2023-11-21 22:40:16 +01:00
slice-iter-len-eq-zero.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
slice-iter-nonnull.rs
update tests that are ignored by debug
2023-09-01 04:01:54 +08:00
slice-position-bounds-check.rs
…
slice-ref-equality.rs
Bless codegen tests.
2023-08-17 18:28:33 +00:00
slice-reverse.rs
…
slice-windows-no-bounds-check.rs
…
some-abis-do-extend-params-to-32-bits.rs
Add more codegen tests
2023-01-17 16:23:22 +01:00
some-global-nonnull.rs
…
sparc-struct-abi.rs
…
split-lto-unit.rs
Add cross-language LLVM CFI support to the Rust compiler
2023-05-03 22:41:29 +00:00
sroa-fragment-debuginfo.rs
Restrict test to x86_64.
2023-08-26 22:55:52 +00:00
sse42-implies-crc32.rs
Update the minimum external LLVM to 14
2023-02-10 16:06:25 -08:00
stack-probes-inline.rs
Update the minimum external LLVM to 16.
2023-11-21 22:40:16 +01:00
stack-protector.rs
tests: be even more permissive on attributes in one test
2023-06-23 09:48:00 -04:00
static-relocation-model-msvc.rs
Add more codegen tests
2023-01-17 16:23:22 +01:00
staticlib-external-inline-fns.rs
…
stores.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
swap-large-types.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
swap-small-types.rs
Stop emitting non-power-of-two vectors in basic LLVM codegen
2023-08-25 20:06:57 -07:00
target-cpu-on-functions.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
target-feature-inline-closure.rs
Don't accidentally detect the commit hash as an fadd instruction
2023-10-10 16:59:49 +11:00
target-feature-overrides.rs
…
thin-lto.rs
Add thinlto support to codegen, assembly and coverage tests
2023-11-30 18:48:03 +08:00
thread-local.rs
tests: adapt for LLVM change 5b386b864c7619897c51a1da97d78f1cf6f3eff6
2023-04-17 10:53:18 -04:00
tied-features-strength.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
to_vec.rs
…
trailing_zeros.rs
add codegen test for issue 107554
2023-08-16 14:04:05 +09:00
transmute-optimized.rs
Update the minimum external LLVM to 15
2023-07-27 14:07:08 -07:00
transmute-scalar.rs
Update the minimum external LLVM to 15
2023-07-27 14:07:08 -07:00
try_identity.rs
…
try_question_mark_nop.rs
Update the minimum external LLVM to 15
2023-07-27 14:07:08 -07:00
tune-cpu-on-functions.rs
Automatically enable cross-crate inlining for small functions
2023-10-17 19:53:51 -04:00
tuple-layout-opt.rs
Remove some wasm/emscripten ignores
2023-08-25 19:48:20 -04:00
unchecked_shifts.rs
tests: update check for inferred nneg on zext
2023-11-13 10:43:33 -05:00
unchecked-float-casts.rs
…
uninit-consts.rs
Update the minimum external LLVM to 15
2023-07-27 14:07:08 -07:00
union-abi.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
unwind-and-panic-abort.rs
…
unwind-extern-exports.rs
codegen: add needs-unwind to tests that require it
2023-05-23 16:54:35 +02:00
unwind-extern-imports.rs
codegen: add needs-unwind to tests that require it
2023-05-23 16:54:35 +02:00
unwind-landingpad-cold.rs
Limit to LLVM 17.0.2 to work around WinEH codegen bug
2023-10-02 11:06:38 +02:00
unwind-landingpad-inline.rs
Limit to LLVM 17.0.2 to work around WinEH codegen bug
2023-10-02 11:06:38 +02:00
used_with_arg.rs
…
var-names.rs
Always name the return place.
2023-07-08 15:38:40 +02:00
vec_pop_push_noop.rs
Add invariant to Vec::pop that len < cap if pop successful
2023-10-16 18:49:25 +02:00
vec-as-ptr.rs
CHECK only for opaque ptr
2023-07-27 14:44:13 -07:00
vec-calloc.rs
Update the minimum external LLVM to 15
2023-07-27 14:07:08 -07:00
vec-in-place.rs
Update the minimum external LLVM to 16.
2023-11-21 22:40:16 +01:00
vec-iter-collect-len.rs
…
vec-optimizes-away.rs
Prevent insta-stable no alloc shim support
2023-05-11 14:35:09 +00:00
vec-reserve-extend.rs
Hint optimizer about reserved capacity
2023-11-02 00:52:06 +00:00
vec-shrink-panik.rs
use indexed loop instead of ptr bumping
2023-06-14 22:22:41 +02:00
vecdeque_no_panic.rs
…
vecdeque-nonempty-get-no-panic.rs
Add test to guard against VecDeque optimization regression
2023-09-21 20:42:21 -07:00
virtual-function-elimination-32bit.rs
…
virtual-function-elimination.rs
Fix a codegen test with some hard-coded hashes
2023-04-05 15:59:29 +00:00
wasm_casts_trapping.rs
…
wasm_exceptions.rs
add codegen-test: wasm-exceptions
2023-07-01 20:24:15 +02:00
zip.rs
…
zst-offset.rs
Add more codegen tests
2023-01-17 16:23:22 +01:00

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