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[LLD, MachO] Default objc_relative_method_lists on MacOS11+/iOS14+ (llvm#101360)
This patch makes `objc_relative_method_lists` default on MacOS 11+ / iOS 14+. Manual override still work if command line argument is provided. To test this change, many explicit arguments are removed from the test files. Some explicit `no_objc_relative...` are also added for tests that don't support this yet. Signed-off-by: Peter Rong <[email protected]>
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6 files changed

+96
-64
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‎lld/MachO/Driver.cpp‎

Lines changed: 55 additions & 43 deletions
Original file line numberDiff line numberDiff line change
@@ -1042,20 +1042,36 @@ static bool shouldAdhocSignByDefault(Architecture arch, PlatformType platform) {
10421042
platform == PLATFORM_XROS_SIMULATOR;
10431043
}
10441044

1045-
static bool dataConstDefault(const InputArgList &args) {
1046-
static const std::array<std::pair<PlatformType, VersionTuple>, 6> minVersion =
1047-
{{{PLATFORM_MACOS, VersionTuple(10, 15)},
1048-
{PLATFORM_IOS, VersionTuple(13, 0)},
1049-
{PLATFORM_TVOS, VersionTuple(13, 0)},
1050-
{PLATFORM_WATCHOS, VersionTuple(6, 0)},
1051-
{PLATFORM_XROS, VersionTuple(1, 0)},
1052-
{PLATFORM_BRIDGEOS, VersionTuple(4, 0)}}};
1053-
PlatformType platform = removeSimulator(config->platformInfo.target.Platform);
1054-
auto it = llvm::find_if(minVersion,
1045+
template <unsigned long N>
1046+
using MinVersions = std::array<std::pair<PlatformType, VersionTuple>, N>;
1047+
1048+
/// Returns true if the platform is greater than the min version.
1049+
/// Returns false if the platform does not exist.
1050+
template <unsigned long N>
1051+
static bool greaterEqMinVersion(const MinVersions<N> &minVersions,
1052+
bool ignoreSimulator) {
1053+
PlatformType platform = config->platformInfo.target.Platform;
1054+
if (ignoreSimulator)
1055+
platform = removeSimulator(platform);
1056+
auto it = llvm::find_if(minVersions,
10551057
[&](const auto &p) { return p.first == platform; });
1056-
if (it != minVersion.end())
1057-
if (config->platformInfo.target.MinDeployment < it->second)
1058-
return false;
1058+
if (it != minVersions.end())
1059+
if (config->platformInfo.target.MinDeployment >= it->second)
1060+
return true;
1061+
return false;
1062+
}
1063+
1064+
static bool dataConstDefault(const InputArgList &args) {
1065+
static const MinVersions<6> minVersion = {{
1066+
{PLATFORM_MACOS, VersionTuple(10, 15)},
1067+
{PLATFORM_IOS, VersionTuple(13, 0)},
1068+
{PLATFORM_TVOS, VersionTuple(13, 0)},
1069+
{PLATFORM_WATCHOS, VersionTuple(6, 0)},
1070+
{PLATFORM_XROS, VersionTuple(1, 0)},
1071+
{PLATFORM_BRIDGEOS, VersionTuple(4, 0)},
1072+
}};
1073+
if (!greaterEqMinVersion(minVersion, true))
1074+
return false;
10591075

10601076
switch (config->outputType) {
10611077
case MH_EXECUTE:
@@ -1106,30 +1122,18 @@ static bool shouldEmitChainedFixups(const InputArgList &args) {
11061122
if (requested)
11071123
return true;
11081124

1109-
static const std::array<std::pair<PlatformType, VersionTuple>, 9> minVersion =
1110-
{{
1111-
{PLATFORM_IOS, VersionTuple(13, 4)},
1112-
{PLATFORM_IOSSIMULATOR, VersionTuple(16, 0)},
1113-
{PLATFORM_MACOS, VersionTuple(13, 0)},
1114-
{PLATFORM_TVOS, VersionTuple(14, 0)},
1115-
{PLATFORM_TVOSSIMULATOR, VersionTuple(15, 0)},
1116-
{PLATFORM_WATCHOS, VersionTuple(7, 0)},
1117-
{PLATFORM_WATCHOSSIMULATOR, VersionTuple(8, 0)},
1118-
{PLATFORM_XROS, VersionTuple(1, 0)},
1119-
{PLATFORM_XROS_SIMULATOR, VersionTuple(1, 0)},
1120-
}};
1121-
PlatformType platform = config->platformInfo.target.Platform;
1122-
auto it = llvm::find_if(minVersion,
1123-
[&](const auto &p) { return p.first == platform; });
1124-
1125-
// We don't know the versions for other platforms, so default to disabled.
1126-
if (it == minVersion.end())
1127-
return false;
1128-
1129-
if (it->second > config->platformInfo.target.MinDeployment)
1130-
return false;
1131-
1132-
return true;
1125+
static const MinVersions<9> minVersion = {{
1126+
{PLATFORM_IOS, VersionTuple(13, 4)},
1127+
{PLATFORM_IOSSIMULATOR, VersionTuple(16, 0)},
1128+
{PLATFORM_MACOS, VersionTuple(13, 0)},
1129+
{PLATFORM_TVOS, VersionTuple(14, 0)},
1130+
{PLATFORM_TVOSSIMULATOR, VersionTuple(15, 0)},
1131+
{PLATFORM_WATCHOS, VersionTuple(7, 0)},
1132+
{PLATFORM_WATCHOSSIMULATOR, VersionTuple(8, 0)},
1133+
{PLATFORM_XROS, VersionTuple(1, 0)},
1134+
{PLATFORM_XROS_SIMULATOR, VersionTuple(1, 0)},
1135+
}};
1136+
return greaterEqMinVersion(minVersion, false);
11331137
}
11341138

11351139
static bool shouldEmitRelativeMethodLists(const InputArgList &args) {
@@ -1140,12 +1144,20 @@ static bool shouldEmitRelativeMethodLists(const InputArgList &args) {
11401144
if (arg && arg->getOption().getID() == OPT_no_objc_relative_method_lists)
11411145
return false;
11421146

1143-
// TODO: If no flag is specified, don't default to false, but instead:
1144-
// - default false on < ios14
1145-
// - default true on >= ios14
1146-
// For now, until this feature is confirmed stable, default to false if no
1147-
// flag is explicitly specified
1148-
return false;
1147+
// If no flag is specified, enable this on newer versions by default.
1148+
// The min versions is taken from
1149+
// ld64(https://github.com/apple-oss-distributions/ld64/blob/47f477cb721755419018f7530038b272e9d0cdea/src/ld/ld.hpp#L310)
1150+
// to mimic to operation of ld64
1151+
// [here](https://github.com/apple-oss-distributions/ld64/blob/47f477cb721755419018f7530038b272e9d0cdea/src/ld/Options.cpp#L6085-L6101)
1152+
static const MinVersions<6> minVersion = {{
1153+
{PLATFORM_MACOS, VersionTuple(10, 16)},
1154+
{PLATFORM_IOS, VersionTuple(14, 0)},
1155+
{PLATFORM_WATCHOS, VersionTuple(7, 0)},
1156+
{PLATFORM_TVOS, VersionTuple(14, 0)},
1157+
{PLATFORM_BRIDGEOS, VersionTuple(5, 0)},
1158+
{PLATFORM_XROS, VersionTuple(1, 0)},
1159+
}};
1160+
return greaterEqMinVersion(minVersion, true);
11491161
}
11501162

11511163
void SymbolPatterns::clear() {

‎lld/test/MachO/objc-category-conflicts.s‎

Lines changed: 11 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -1,3 +1,6 @@
1+
# `-no_objc_relative_method_lists` needs to be explicitly added to this test to avoid crashing after `-objc_relative_method_lists` was made default.
2+
# TODO: Make this test compatible with default `-objc_relative_method_lists` and remove the `-no_objc_relative_method_lists` flag. Issue #101419
3+
14
# REQUIRES: x86
25
# RUN: rm -rf %t; split-file %s %t
36
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos11.0 -I %t %t/cat1.s -o %t/cat1.o
@@ -10,31 +13,31 @@
1013
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos11.0 -I %t %t/cat2.s --defsym MAKE_LOAD_METHOD=1 -o %t/cat2-with-load.o
1114
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos11.0 -I %t %t/klass.s --defsym MAKE_LOAD_METHOD=1 -o %t/klass-with-load.o
1215
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos11.0 -I %t %t/klass-with-no-rodata.s -o %t/klass-with-no-rodata.o
13-
# RUN: %lld -dylib -lobjc %t/klass.o -o %t/libklass.dylib
16+
# RUN: %lld -no_objc_relative_method_lists -dylib -lobjc %t/klass.o -o %t/libklass.dylib
1417

15-
# RUN: %no-fatal-warnings-lld --check-category-conflicts -dylib -lobjc %t/klass.o %t/cat1.o %t/cat2.o -o \
18+
# RUN: %no-fatal-warnings-lld -no_objc_relative_method_lists --check-category-conflicts -dylib -lobjc %t/klass.o %t/cat1.o %t/cat2.o -o \
1619
# RUN: /dev/null 2>&1 | FileCheck %s --check-prefixes=CATCLS,CATCAT
17-
# RUN: %no-fatal-warnings-lld --check-category-conflicts -dylib -lobjc %t/libklass.dylib %t/cat1.o \
20+
# RUN: %no-fatal-warnings-lld -no_objc_relative_method_lists --check-category-conflicts -dylib -lobjc %t/libklass.dylib %t/cat1.o \
1821
# RUN: %t/cat2.o -o /dev/null 2>&1 | FileCheck %s --check-prefix=CATCAT
1922

20-
# RUN: %no-fatal-warnings-lld --check-category-conflicts -dylib -lobjc %t/klass_w_sym.o %t/cat1_w_sym.o %t/cat2_w_sym.o -o \
23+
# RUN: %no-fatal-warnings-lld -no_objc_relative_method_lists --check-category-conflicts -dylib -lobjc %t/klass_w_sym.o %t/cat1_w_sym.o %t/cat2_w_sym.o -o \
2124
# RUN: /dev/null 2>&1 | FileCheck %s --check-prefixes=CATCLS_W_SYM,CATCAT_W_SYM
22-
# RUN: %no-fatal-warnings-lld --check-category-conflicts -dylib -lobjc %t/libklass.dylib %t/cat1_w_sym.o \
25+
# RUN: %no-fatal-warnings-lld -no_objc_relative_method_lists --check-category-conflicts -dylib -lobjc %t/libklass.dylib %t/cat1_w_sym.o \
2326
# RUN: %t/cat2_w_sym.o -o /dev/null 2>&1 | FileCheck %s --check-prefix=CATCAT_W_SYM
2427

2528
## Check that we don't emit spurious warnings around the +load method while
2629
## still emitting the other warnings. Note that we have made separate
2730
## `*-with-load.s` files for ease of comparison with ld64; ld64 will not warn
2831
## at all if multiple +load methods are present.
29-
# RUN: %no-fatal-warnings-lld --check-category-conflicts -dylib -lobjc %t/klass-with-load.o \
32+
# RUN: %no-fatal-warnings-lld -no_objc_relative_method_lists --check-category-conflicts -dylib -lobjc %t/klass-with-load.o \
3033
# RUN: %t/cat1-with-load.o %t/cat2-with-load.o -o /dev/null 2>&1 | \
3134
# RUN: FileCheck %s --check-prefixes=CATCLS,CATCAT --implicit-check-not '+load'
3235

3336
## Regression test: Check that we don't crash.
34-
# RUN: %no-fatal-warnings-lld --check-category-conflicts -dylib -lobjc %t/klass-with-no-rodata.o -o /dev/null
37+
# RUN: %no-fatal-warnings-lld -no_objc_relative_method_lists --check-category-conflicts -dylib -lobjc %t/klass-with-no-rodata.o -o /dev/null
3538

3639
## Check that we don't emit any warnings without --check-category-conflicts.
37-
# RUN: %no-fatal-warnings-lld -dylib -lobjc %t/klass.o %t/cat1.o %t/cat2.o -o \
40+
# RUN: %no-fatal-warnings-lld -no_objc_relative_method_lists -dylib -lobjc %t/klass.o %t/cat1.o %t/cat2.o -o \
3841
# RUN: /dev/null 2>&1 | FileCheck %s --implicit-check-not 'warning' --allow-empty
3942

4043
# CATCLS: warning: method '+s1' has conflicting definitions:

‎lld/test/MachO/objc-category-merging-complete-test.s‎

Lines changed: 8 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -1,3 +1,6 @@
1+
# `-no_objc_relative_method_lists` needs to be explicitly added to this test to avoid crashing after `-objc_relative_method_lists` was made default.
2+
# TODO: Make this test compatible with default `-objc_relative_method_lists` and remove the `-no_objc_relative_method_lists` flag. Issue #101419
3+
14
# REQUIRES: aarch64
25
# RUN: rm -rf %t; split-file %s %t && cd %t
36

@@ -7,18 +10,18 @@
710
# RUN: %lld -arch arm64 a64_file1.o -o a64_file1.dylib -dylib
811

912
# RUN: llvm-mc -filetype=obj -triple=arm64-apple-macos -o a64_file2.o a64_file2.s
10-
# RUN: %lld -arch arm64 -o a64_file2_no_merge.exe a64_file1.dylib a64_file2.o
11-
# RUN: %lld -arch arm64 -o a64_file2_no_merge_v2.exe a64_file1.dylib a64_file2.o -no_objc_category_merging
12-
# RUN: %lld -arch arm64 -o a64_file2_no_merge_v3.exe a64_file1.dylib a64_file2.o -objc_category_merging -no_objc_category_merging
13-
# RUN: %lld -arch arm64 -o a64_file2_merge.exe -objc_category_merging a64_file1.dylib a64_file2.o
13+
# RUN: %lld -no_objc_relative_method_lists -arch arm64 -o a64_file2_no_merge.exe a64_file1.dylib a64_file2.o
14+
# RUN: %lld -no_objc_relative_method_lists -arch arm64 -o a64_file2_no_merge_v2.exe a64_file1.dylib a64_file2.o -no_objc_category_merging
15+
# RUN: %lld -no_objc_relative_method_lists -arch arm64 -o a64_file2_no_merge_v3.exe a64_file1.dylib a64_file2.o -objc_category_merging -no_objc_category_merging
16+
# RUN: %lld -no_objc_relative_method_lists -arch arm64 -o a64_file2_merge.exe -objc_category_merging a64_file1.dylib a64_file2.o
1417

1518
# RUN: llvm-objdump --objc-meta-data --macho a64_file2_no_merge.exe | FileCheck %s --check-prefixes=NO_MERGE_CATS
1619
# RUN: llvm-objdump --objc-meta-data --macho a64_file2_no_merge_v2.exe | FileCheck %s --check-prefixes=NO_MERGE_CATS
1720
# RUN: llvm-objdump --objc-meta-data --macho a64_file2_no_merge_v3.exe | FileCheck %s --check-prefixes=NO_MERGE_CATS
1821
# RUN: llvm-objdump --objc-meta-data --macho a64_file2_merge.exe | FileCheck %s --check-prefixes=MERGE_CATS
1922

2023
############ Test merging multiple categories into the base class ############
21-
# RUN: %lld -arch arm64 -o a64_file2_merge_into_class.exe -objc_category_merging a64_file1.o a64_file2.o
24+
# RUN: %lld -no_objc_relative_method_lists -arch arm64 -o a64_file2_merge_into_class.exe -objc_category_merging a64_file1.o a64_file2.o
2225
# RUN: llvm-objdump --objc-meta-data --macho a64_file2_merge_into_class.exe | FileCheck %s --check-prefixes=MERGE_CATS_CLS
2326

2427

‎lld/test/MachO/objc-category-merging-erase-objc-name-test.s‎

Lines changed: 4 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,11 +1,14 @@
1+
# `-no_objc_relative_method_lists` needs to be explicitly added to this test to avoid crashing after `-objc_relative_method_lists` was made default.
2+
# TODO: Make this test compatible with default `-objc_relative_method_lists` and remove the `-no_objc_relative_method_lists` flag. Issue #101419
3+
14
; REQUIRES: aarch64
25

36
; Here we test that if we defined a protocol MyTestProtocol and also a category MyTestProtocol
47
; then when merging the category into the base class (and deleting the category), we don't
58
; delete the 'MyTestProtocol' name
69

710
; RUN: llvm-mc -filetype=obj -triple=arm64-apple-macos -o %T/erase-objc-name.o %s
8-
; RUN: %lld -arch arm64 -dylib -o %T/erase-objc-name.dylib %T/erase-objc-name.o -objc_category_merging
11+
; RUN: %lld -no_objc_relative_method_lists -arch arm64 -dylib -o %T/erase-objc-name.dylib %T/erase-objc-name.o -objc_category_merging
912
; RUN: llvm-objdump --objc-meta-data --macho %T/erase-objc-name.dylib | FileCheck %s --check-prefixes=MERGE_CATS
1013

1114
; === Check merge categories enabled ===

‎lld/test/MachO/objc-category-merging-minimal.s‎

Lines changed: 6 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -1,3 +1,6 @@
1+
# `-no_objc_relative_method_lists` needs to be explicitly added to this test to avoid crashing after `-objc_relative_method_lists` was made default.
2+
# TODO: Make this test compatible with default `-objc_relative_method_lists` and remove the `-no_objc_relative_method_lists` flag. Issue #101419
3+
14
# REQUIRES: aarch64
25
# RUN: rm -rf %t; split-file %s %t && cd %t
36

@@ -9,23 +12,23 @@
912
## Create our main testing dylib - linking against the fake dylib above
1013
# RUN: llvm-mc -filetype=obj -triple=arm64-apple-macos -o merge_cat_minimal.o merge_cat_minimal.s
1114
# RUN: %lld -arch arm64 -dylib -o merge_cat_minimal_no_merge.dylib a64_fakedylib.dylib merge_cat_minimal.o
12-
# RUN: %lld -arch arm64 -dylib -o merge_cat_minimal_merge.dylib -objc_category_merging a64_fakedylib.dylib merge_cat_minimal.o
15+
# RUN: %lld -no_objc_relative_method_lists -arch arm64 -dylib -o merge_cat_minimal_merge.dylib -objc_category_merging a64_fakedylib.dylib merge_cat_minimal.o
1316

1417
## Now verify that the flag caused category merging to happen appropriatelly
1518
# RUN: llvm-objdump --objc-meta-data --macho merge_cat_minimal_no_merge.dylib | FileCheck %s --check-prefixes=NO_MERGE_CATS
1619
# RUN: llvm-objdump --objc-meta-data --macho merge_cat_minimal_merge.dylib | FileCheck %s --check-prefixes=MERGE_CATS
1720

1821
############ Test merging multiple categories into the base class ############
1922
# RUN: llvm-mc -filetype=obj -triple=arm64-apple-macos -o merge_base_class_minimal.o merge_base_class_minimal.s
20-
# RUN: %lld -arch arm64 -dylib -o merge_base_class_minimal_yes_merge.dylib -objc_category_merging merge_base_class_minimal.o merge_cat_minimal.o
23+
# RUN: %lld -no_objc_relative_method_lists -arch arm64 -dylib -o merge_base_class_minimal_yes_merge.dylib -objc_category_merging merge_base_class_minimal.o merge_cat_minimal.o
2124
# RUN: %lld -arch arm64 -dylib -o merge_base_class_minimal_no_merge.dylib merge_base_class_minimal.o merge_cat_minimal.o
2225

2326
# RUN: llvm-objdump --objc-meta-data --macho merge_base_class_minimal_no_merge.dylib | FileCheck %s --check-prefixes=NO_MERGE_INTO_BASE
2427
# RUN: llvm-objdump --objc-meta-data --macho merge_base_class_minimal_yes_merge.dylib | FileCheck %s --check-prefixes=YES_MERGE_INTO_BASE
2528

2629
############ Test merging swift category into the base class ############
2730
# RUN: llvm-mc -filetype=obj -triple=arm64-apple-macos -o MyBaseClassSwiftExtension.o MyBaseClassSwiftExtension.s
28-
# RUN: %lld -arch arm64 -dylib -o merge_base_class_swift_minimal_yes_merge.dylib -objc_category_merging MyBaseClassSwiftExtension.o merge_base_class_minimal.o
31+
# RUN: %lld -no_objc_relative_method_lists -arch arm64 -dylib -o merge_base_class_swift_minimal_yes_merge.dylib -objc_category_merging MyBaseClassSwiftExtension.o merge_base_class_minimal.o
2932
# RUN: llvm-objdump --objc-meta-data --macho merge_base_class_swift_minimal_yes_merge.dylib | FileCheck %s --check-prefixes=YES_MERGE_INTO_BASE_SWIFT
3033

3134
#### Check merge categories enabled ###

‎lld/test/MachO/objc-relative-method-lists-simple.s‎

Lines changed: 12 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -3,20 +3,28 @@
33
# RUN: rm -rf %t; split-file %s %t && cd %t
44

55
## Compile a64_rel_dylib.o
6-
# RUN: llvm-mc -filetype=obj -triple=arm64-apple-macos -o a64_rel_dylib.o a64_simple_class.s
6+
# RUN: llvm-mc -filetype=obj -triple=arm64-apple-macos10.15 -o a64_rel_dylib.o a64_simple_class.s
77

88
## Test arm64 + relative method lists
9-
# RUN: %no-lsystem-lld a64_rel_dylib.o -o a64_rel_dylib.dylib -map a64_rel_dylib.map -dylib -arch arm64 -objc_relative_method_lists
9+
# RUN: %no-lsystem-lld a64_rel_dylib.o -o a64_rel_dylib.dylib -map a64_rel_dylib.map -dylib -arch arm64
1010
# RUN: llvm-objdump --macho --objc-meta-data a64_rel_dylib.dylib | FileCheck %s --check-prefix=CHK_REL
1111

1212
## Test arm64 + relative method lists + dead-strip
13-
# RUN: %no-lsystem-lld a64_rel_dylib.o -o a64_rel_dylib.dylib -map a64_rel_dylib.map -dylib -arch arm64 -objc_relative_method_lists -dead_strip
13+
# RUN: %no-lsystem-lld a64_rel_dylib.o -o a64_rel_dylib.dylib -map a64_rel_dylib.map -dylib -arch arm64 -dead_strip
1414
# RUN: llvm-objdump --macho --objc-meta-data a64_rel_dylib.dylib | FileCheck %s --check-prefix=CHK_REL
1515

1616
## Test arm64 + traditional method lists (no relative offsets)
1717
# RUN: %no-lsystem-lld a64_rel_dylib.o -o a64_rel_dylib.dylib -map a64_rel_dylib.map -dylib -arch arm64 -no_objc_relative_method_lists
1818
# RUN: llvm-objdump --macho --objc-meta-data a64_rel_dylib.dylib | FileCheck %s --check-prefix=CHK_NO_REL
1919

20+
## Test arm64 + relative method lists by explicitly adding `-objc_relative_method_lists`.
21+
# RUN: %lld a64_rel_dylib.o -o a64_rel_dylib.dylib -map a64_rel_dylib.map -dylib -arch arm64 -platform_version macOS 10.15 10.15 -objc_relative_method_lists
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# RUN: llvm-objdump --macho --objc-meta-data a64_rel_dylib.dylib | FileCheck %s --check-prefix=CHK_REL
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## Test arm64 + no relative method lists by default.
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# RUN: %lld a64_rel_dylib.o -o a64_rel_dylib.dylib -map a64_rel_dylib.map -dylib -arch arm64 -platform_version macOS 10.15 10.15
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# RUN: llvm-objdump --macho --objc-meta-data a64_rel_dylib.dylib | FileCheck %s --check-prefix=CHK_NO_REL
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CHK_REL: Contents of (__DATA_CONST,__objc_classlist) section
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CHK_REL-NEXT: _OBJC_CLASS_$_MyClass
@@ -125,7 +133,7 @@ CHK_NO_REL-NEXT: imp +[MyClass class_method_02]
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.include "objc-macros.s"
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.section __TEXT,__text,regular,pure_instructions
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.build_version macos, 11, 0
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.build_version macos, 10, 15
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.objc_selector_def "-[MyClass instance_method_00]"
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.objc_selector_def "-[MyClass instance_method_01]"

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