[llvm-ar][test] Increase llvm-ar test coverage

[gbreynoo]

Summary

A number of tests covering llvm-ar behaviour.

[MaskRay]

test/tools/llvm-ar/create.test

1

Since you've used ## below..

# -> ##

test/tools/llvm-ar/dash-before-letter.test

1

# -> ##

test/tools/llvm-ar/extract.test

1

# -> ##

7

--implicit-check-not {{.}} does not check a regular expression.

Use | count 0 instead

test/tools/llvm-ar/insert-after.test

1

# -> ##

3

Maybe split this into rm %t-back.a/etc below.

[gbreynoo]

After MaskRay's suggestion I have removed all use of rm -f %t-*

test/tools/llvm-ar/create.test

1

The times I've used ## below has been to make comments stand out more in files that require the use of # on each line. Would it be preferred to standardise the use of ## and # on all files regardless of their use as input YAML files?

test/tools/llvm-ar/extract.test

7

I did some experimentation with implicit-check-not and a regular expression and it seemed to work fine, do you have a test case that illustrates the issue?

[MaskRay]

test/tools/llvm-ar/create.test

1

From what I can tell in llvm-objcopy, llvm-objdump, ..., comments in the header are also prefixed with ## nowadays.

9

No strong preference here, but if you like it:

RUN: rm -f %t.warning.ar
RUN: llvm-ar r %t.warning.ar %t1.txt %t2.txt 2>&1 \
RUN:   | FileCheck %s --check-prefix=WARNING -DOUTPUT=%t.warning.ar

WARNING: warning: creating [[OUTPUT]]

13

FileCheck --allow-empty /dev/null --implicit-check-not={{.}}

test/tools/llvm-ar/dash-before-letter.test

2

Can you merge this test with default-add.test ?

test/tools/llvm-ar/extract.test

7

Thanks for clarification. It works.

FileCheck --allow-empty /dev/null --implicit-check-not={{.}}

14

test/tools/llvm-ar/move-after.test

32

It may be interesting to specifies files not in the order:

llvm-ar ma %t1.txt %t-multiple.a %t4.txt %t3.txt

test/tools/llvm-ar/preserve-mod-time.test

8

TZ=UTC

11

--full-time is specific to GNU coreutils.

See llvm-objcopy/ELF/strip-preserve-mtime.test, check just the yyyy part should be ok:

# CHECK-PRESERVE-MTIME:        {{[[:space:]]1997}}

[gbreynoo]

Thanks for the comments MaskRay, I have updated the revision.

[gbreynoo]

test/tools/llvm-ar/dash-before-letter.test

2

I didn't realise that default-add.test already covered this functionality. Unless we want to spin off a new test explicitly for dashes before letters then I think default-add.test should suffice for coverage.

[MaskRay]

test/tools/llvm-ar/dash-before-letter.test

2

The spin-off dash-before-letter.test may be clearer. You can probably delete the multi-dash tests from default-add.test.

[MaskRay]

test/tools/llvm-ar/extract.test

5

##

test/tools/llvm-ar/insert-after.test

19

##

test/tools/llvm-ar/insert-before.test

9

##

test/tools/llvm-ar/move-before.test

9

##

[phosek]

The tools/llvm-ar/extract.test is failing on macOS:

******************** TEST 'LLVM :: tools/llvm-ar/extract.test' FAILED ********************
Script:
--
: 'RUN: at line 2';   rm -rf /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp && mkdir -p /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/extracted/
: 'RUN: at line 5';   /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/bin/llvm-ar cr /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/empty.a
: 'RUN: at line 6';   /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/bin/llvm-ar x /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/empty.a 2>&1    | /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/bin/FileCheck --allow-empty /dev/null --implicit-check-not={{.}}
: 'RUN: at line 9';   echo filea > /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/a.txt
: 'RUN: at line 10';   echo fileb > /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/b.txt
: 'RUN: at line 11';   /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/bin/llvm-ar rc /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/archive.a /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/a.txt /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/b.txt
: 'RUN: at line 14';   cd /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/extracted && /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/bin/llvm-ar x /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/archive.a a.txt
: 'RUN: at line 15';   diff /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/a.txt /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/extracted/a.txt
: 'RUN: at line 18';   rm /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/extracted/a.txt
: 'RUN: at line 19';   cd /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/extracted && /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/bin/llvm-ar x /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/archive.a
: 'RUN: at line 20';   diff /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/a.txt /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/extracted/a.txt
: 'RUN: at line 21';   diff /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/b.txt /b/s/w/ir/k/recipe_cleanup/clanglRrIXg/llvm_build_dir/test/tools/llvm-ar/Output/extract.test.tmp/extracted/b.txt
--
Exit Code: 1

Command Output (stdout):
--
1a2,3
> 
> 

--

Is it possible to revert this change?

[jfb]

Reverted in https://reviews.llvm.org/rL365383

[gbreynoo]

Thanks phosek and jfb, I will investigate this macOS issue.

[MaskRay]

I'd say XFAIL: darwin would be cleaner then a revert... This apparently works fine on other OSes except that there is some hidden macOS issue that hasn't been sorted out.

If the archive member is not a regular object, the format will be detected incorrectly?

[gbreynoo]

Simmilarly to D63197, I'm not sure if it's preferable to make this test XFAIL: darwin or explicitly call llvm-ar with --format=gnu. What do you think jfb?

test/tools/llvm-ar/create.test

+# Test the creation warning and supression of that warning.
+
+RUN: rm -f %t.warning.ar %t.supressed.ar
+RUN: touch %t1.txt
+RUN: touch %t2.txt
+
+RUN: llvm-ar r %t.warning.ar %t1.txt %t2.txt 2>&1 \
+RUN:   | FileCheck %s --check-prefix=WARNING
+
+RUN: llvm-ar cr %t.supressed.ar %t1.txt %t2.txt 2>&1 \
+RUN:   | FileCheck --allow-empty %s --check-prefix=SUPRESSED
+
+WARNING: warning: creating {{.*}}warning.ar
+WARNING-NOT: {{.}}
+
+SUPRESSED-NOT: {{.}}

test/tools/llvm-ar/dash-before-letter.test

+# Test the use of dash before key letters.
+
+RUN: rm -f %t.ar
+RUN: touch %t1.txt
+RUN: touch %t2.txt
+
+RUN: llvm-ar -cr %t.ar %t1.txt
+RUN: llvm-ar -r -s %t.ar %t2.txt
+RUN: llvm-ar -t %t.ar | FileCheck %s
+
+CHECK:      1.txt
+CHECK-NEXT: 2.txt

test/tools/llvm-ar/delete.test

+## Test the deletion of members and that symbols are removed from the symbol table.
+
+# RUN: rm -f %t.a
+# RUN: yaml2obj %s -o %t-delete.o --docnum=1
+# RUN: yaml2obj %s -o %t-keep.o --docnum=2
+# RUN: touch %t1.txt
+# RUN: touch %t2.txt
+
+## Add file:
+# RUN: llvm-ar rc %t.a %t1.txt %t-delete.o %t-keep.o %t2.txt
+# RUN: llvm-nm --print-armap %t.a \
+# RUN:   | FileCheck %s --check-prefix=SYMBOL-ADDED
+# RUN: llvm-ar t %t.a | FileCheck %s --check-prefix=FILE-ADDED
+
+# SYMBOL-ADDED:      symbol1
+# SYMBOL-ADDED-NEXT: symbol2
+
+# FILE-ADDED:      1.txt
+# FILE-ADDED-NEXT: delete.o
+# FILE-ADDED-NEXT: keep.o
+# FILE-ADDED-NEXT: 2.txt
+
+## Delete file that is not a member:
+# RUN: cp %t.a %t-archive-copy.a
+# RUN: llvm-ar d %t.a t/missing.o
+# RUN: cmp %t.a %t-archive-copy.a
+
+## Delete file:
+# RUN: llvm-ar d %t.a %t-delete.o
+# RUN: llvm-nm --print-armap %t.a \
+# RUN:   | FileCheck %s --check-prefix=SYMBOL-DELETED --implicit-check-not symbol1
+# RUN: llvm-ar t %t.a \
+# RUN:   | FileCheck %s --check-prefix=FILE-DELETED --implicit-check-not delete.o
+
+# SYMBOL-DELETED: symbol2
+
+# FILE-DELETED:      1.txt
+# FILE-DELETED-NEXT: keep.o
+# FILE-DELETED-NEXT: 2.txt
+
+--- !ELF
+FileHeader:
+  Class:   ELFCLASS64
+  Data:    ELFDATA2LSB
+  Type:    ET_REL
+  Machine: EM_X86_64
+Sections:
+  - Name: .text
+    Type: SHT_PROGBITS
+Symbols:
+  - Name:    symbol1
+    Binding: STB_GLOBAL
+    Section: .text
+
+--- !ELF
+FileHeader:
+  Class:   ELFCLASS64
+  Data:    ELFDATA2LSB
+  Type:    ET_REL
+  Machine: EM_X86_64
+Sections:
+  - Name: .text
+    Type: SHT_PROGBITS
+Symbols:
+  - Name:    symbol2
+    Binding: STB_GLOBAL
+    Section: .text

test/tools/llvm-ar/extract.test

+# Test extract operation.
+RUN: rm -rf %t && mkdir -p %t/extracted/
+
+# Extracting from an empty archive should not warn or error:
+RUN: llvm-ar cr %t/empty.a
+RUN: llvm-ar x %t/empty.a 2>&1 \
+RUN:   | FileCheck --allow-empty %s --implicit-check-not {{.}}
+
+RUN: echo filea > %t/a.txt
+RUN: echo fileb > %t/b.txt
+RUN: llvm-ar rc %t/archive.a %t/a.txt %t/b.txt
+
+# Single member:
+RUN: cd %t/extracted && llvm-ar x %t/archive.a a.txt
+RUN: diff %t/a.txt %t/extracted/a.txt 
+
+# All members:
+RUN: rm %t/extracted/a.txt
+RUN: cd %t/extracted && llvm-ar x %t/archive.a
+RUN: diff %t/a.txt %t/extracted/a.txt 
+RUN: diff %t/b.txt %t/extracted/b.txt 

test/tools/llvm-ar/insert-after.test

+# Test inserting files after a file.
+
+RUN: rm -f %t-*
+RUN: touch %t1.txt
+RUN: touch %t2.txt
+RUN: touch %t3.txt
+RUN: touch %t4.txt
+
+# Insert one file:
+RUN: llvm-ar rc %t-one.a %t1.txt %t2.txt
+RUN: llvm-ar ra %t1.txt %t-one.a %t3.txt
+RUN: llvm-ar t %t-one.a | FileCheck %s --check-prefix=ONE
+
+ONE:      1.txt
+ONE-NEXT: 3.txt
+ONE-NEXT: 2.txt
+
+# Insert file at back:
+RUN: llvm-ar rc %t-back.a %t1.txt %t2.txt
+RUN: llvm-ar ra %t2.txt %t-back.a %t3.txt
+RUN: llvm-ar t %t-back.a | FileCheck %s --check-prefix=BACK
+
+BACK:      1.txt
+BACK-NEXT: 2.txt
+BACK-NEXT: 3.txt
+
+# Insert multiple files:
+RUN: llvm-ar rc %t-multiple.a %t1.txt %t2.txt
+RUN: llvm-ar ra %t1.txt %t-multiple.a %t3.txt %t4.txt
+RUN: llvm-ar t %t-multiple.a | FileCheck %s --check-prefix=MULTIPLE
+
+MULTIPLE:      1.txt
+MULTIPLE-NEXT: 3.txt
+MULTIPLE-NEXT: 4.txt
+MULTIPLE-NEXT: 2.txt
+
+# Insert after invalid file:
+RUN: llvm-ar rc %t-invalid.a %t1.txt %t2.txt %t3.txt
+RUN: not llvm-ar ra invalid.txt %t-invalid.a %t2.txt 2>&1 \
+RUN:   | FileCheck %s --check-prefix=ERROR
+RUN: llvm-ar t %t-invalid.a | FileCheck %s --check-prefix=INVALID
+
+ERROR: error: Insertion point not found.
+INVALID:      1.txt
+INVALID-NEXT: 2.txt
+INVALID-NEXT: 3.txt
+
+# Insert file at the same position:
+RUN: llvm-ar rc %t-position.a %t1.txt %t2.txt %t3.txt
+RUN: llvm-ar ra %t1.txt %t-position.a %t2.txt
+RUN: llvm-ar t %t-position.a | FileCheck %s --check-prefix=POSITION
+
+POSITION:      1.txt
+POSITION-NEXT: 2.txt
+POSITION-NEXT: 3.txt

test/tools/llvm-ar/insert-before.test

+# Test inserting files before a file.
+
+RUN: rm -f %t-*
+RUN: touch %t1.txt
+RUN: touch %t2.txt
+RUN: touch %t3.txt
+RUN: touch %t4.txt
+
+# Insert one file:
+RUN: llvm-ar rc %t-one.a %t1.txt %t2.txt
+RUN: llvm-ar rb %t2.txt %t-one.a %t3.txt
+RUN: llvm-ar t %t-one.a | FileCheck %s --check-prefix=ONE
+
+ONE:      1.txt
+ONE-NEXT: 3.txt
+ONE-NEXT: 2.txt
+
+# Insert file at front:
+RUN: llvm-ar rc %t-front.a %t1.txt %t2.txt
+RUN: llvm-ar rb %t1.txt %t-front.a %t3.txt
+RUN: llvm-ar t %t-front.a | FileCheck %s --check-prefix=FRONT
+
+FRONT:      3.txt
+FRONT-NEXT: 1.txt
+FRONT-NEXT: 2.txt
+
+# Insert multiple files:
+RUN: llvm-ar rc %t-multiple.a %t1.txt %t2.txt
+RUN: llvm-ar rb %t2.txt %t-multiple.a %t3.txt %t4.txt
+RUN: llvm-ar t %t-multiple.a | FileCheck %s --check-prefix=MULTIPLE
+
+MULTIPLE:      1.txt
+MULTIPLE-NEXT: 3.txt
+MULTIPLE-NEXT: 4.txt
+MULTIPLE-NEXT: 2.txt
+
+# Insert before an invalid file:
+RUN: llvm-ar rc %t-invalid.a %t1.txt %t2.txt %t3.txt
+RUN: not llvm-ar rb invalid.txt %t-invalid.a %t2.txt 2>&1 \
+RUN:   | FileCheck %s --check-prefix=ERROR
+RUN: llvm-ar t %t-invalid.a | FileCheck %s --check-prefix=INVALID
+
+ERROR: error: Insertion point not found.
+INVALID:      1.txt
+INVALID-NEXT: 2.txt
+INVALID-NEXT: 3.txt
+
+# Insert file at the same position:
+RUN: llvm-ar rc %t-position.a %t1.txt %t2.txt %t3.txt
+RUN: llvm-ar rb %t3.txt %t-position.a %t2.txt
+RUN: llvm-ar t %t-position.a | FileCheck %s --check-prefix=POSITION
+
+POSITION:      1.txt
+POSITION-NEXT: 2.txt
+POSITION-NEXT: 3.txt

test/tools/llvm-ar/move-after.test

+# Test moving files after a file.
+
+RUN: rm -f %t-*
+RUN: touch %t1.txt
+RUN: touch %t2.txt
+RUN: touch %t3.txt
+RUN: touch %t4.txt
+
+# Move one file:
+RUN: llvm-ar rc %t-one.a %t1.txt %t2.txt %t3.txt
+RUN: llvm-ar ma %t1.txt %t-one.a %t3.txt
+RUN: llvm-ar t %t-one.a | FileCheck %s --check-prefix=ONE
+
+ONE:      1.txt
+ONE-NEXT: 3.txt
+ONE-NEXT: 2.txt
+
+# Move file to back:
+RUN: llvm-ar rc %t-back.a %t1.txt %t2.txt %t3.txt
+RUN: llvm-ar ma %t2.txt %t-back.a %t1.txt
+RUN: llvm-ar t %t-back.a | FileCheck %s --check-prefix=BACK
+
+BACK:      2.txt
+BACK-NEXT: 1.txt
+BACK-NEXT: 3.txt
+
+# Move multiple files:
+RUN: llvm-ar rc %t-multiple.a %t1.txt %t2.txt %t3.txt %t4.txt
+RUN: llvm-ar ma %t1.txt %t-multiple.a %t3.txt %t4.txt
+RUN: llvm-ar t %t-multiple.a | FileCheck %s --check-prefix=MULTIPLE
+
+MULTIPLE:      1.txt
+MULTIPLE-NEXT: 3.txt
+MULTIPLE-NEXT: 4.txt
+MULTIPLE-NEXT: 2.txt
+
+# Move after invalid file:
+RUN: llvm-ar rc %t-invalid.a %t1.txt %t2.txt %t3.txt
+RUN: not llvm-ar ma invalid.txt %t-invalid.a %t2.txt 2>&1 \
+RUN:   | FileCheck %s --check-prefix=ERROR
+RUN: llvm-ar t %t-invalid.a | FileCheck %s --check-prefix=INVALID
+
+ERROR: error: Insertion point not found.
+INVALID:      1.txt
+INVALID-NEXT: 2.txt
+INVALID-NEXT: 3.txt
+
+# Move file to the same position:
+RUN: llvm-ar rc %t-position.a %t1.txt %t2.txt %t3.txt
+RUN: llvm-ar ma %t1.txt %t-position.a %t2.txt
+RUN: llvm-ar t %t-position.a | FileCheck %s --check-prefix=POSITION
+
+POSITION:      1.txt
+POSITION-NEXT: 2.txt
+POSITION-NEXT: 3.txt

test/tools/llvm-ar/move-before.test

+# Test moving files after a file.
+
+RUN: rm -f %t-*
+RUN: touch %t1.txt
+RUN: touch %t2.txt
+RUN: touch %t3.txt
+RUN: touch %t4.txt
+
+# Move one file:
+RUN: llvm-ar rc %t-one.a %t1.txt %t2.txt %t3.txt
+RUN: llvm-ar mb %t2.txt %t-one.a %t3.txt
+RUN: llvm-ar t %t-one.a | FileCheck %s --check-prefix=ONE
+
+ONE:      1.txt
+ONE-NEXT: 3.txt
+ONE-NEXT: 2.txt
+
+# Move file to front:
+RUN: llvm-ar rc %t-front.ar %t1.txt %t2.txt %t3.txt
+RUN: llvm-ar mb %t1.txt %t-front.ar %t3.txt
+RUN: llvm-ar t %t-front.ar | FileCheck %s --check-prefix=FRONT
+
+FRONT:      3.txt
+FRONT-NEXT: 1.txt
+FRONT-NEXT: 2.txt
+
+# Move multiple files:
+RUN: llvm-ar rc %t-multiple.a %t1.txt %t2.txt %t3.txt %t4.txt
+RUN: llvm-ar mb %t2.txt %t-multiple.a %t3.txt %t4.txt
+RUN: llvm-ar t %t-multiple.a | FileCheck %s --check-prefix=MULTIPLE
+
+MULTIPLE:      1.txt
+MULTIPLE-NEXT: 3.txt
+MULTIPLE-NEXT: 4.txt
+MULTIPLE-NEXT: 2.txt
+
+# Move before invalid file:
+RUN: llvm-ar rc %t-invalid.a %t1.txt %t2.txt %t3.txt
+RUN: not llvm-ar mb invalid.txt %t-invalid.a %t2.txt 2>&1 \
+RUN:   | FileCheck %s --check-prefix=ERROR
+RUN: llvm-ar t %t-invalid.a | FileCheck %s --check-prefix=INVALID
+
+ERROR: error: Insertion point not found.
+INVALID:      1.txt
+INVALID-NEXT: 2.txt
+INVALID-NEXT: 3.txt
+
+# Move file to the same position:
+RUN: llvm-ar rc %t-position.a %t1.txt %t2.txt %t3.txt
+RUN: llvm-ar mb %t3.txt %t-position.a %t2.txt
+RUN: llvm-ar t %t-position.a | FileCheck %s --check-prefix=POSITION
+
+POSITION:      1.txt
+POSITION-NEXT: 2.txt
+POSITION-NEXT: 3.txt
+
+# Move file after itself:
+RUN: llvm-ar rc %t-same.ar %t1.txt %t2.txt %t3.txt
+RUN: llvm-ar mb %t2.txt %t-same.ar %t2.txt
+RUN: llvm-ar t %t-same.ar | FileCheck %s --check-prefix=SAME
+
+SAME:      1.txt
+SAME-NEXT: 2.txt
+SAME-NEXT: 3.txt

test/tools/llvm-ar/preserve-mod-time.test

+# Test the "o" modifier, preserving the original modification
+# times of extracted files.
+
+RUN: rm -rf %t && mkdir -p %t/extracted/
+RUN: touch %t/a.txt
+
+RUN: env TZ=GMT touch -t 200001020304 %t/a.txt
+RUN: llvm-ar rcU %t/timestamp.a %t/a.txt
+RUN: cd %t/extracted && llvm-ar xo %t/timestamp.a
+RUN: env TZ=GMT ls %t/extracted --full-time | FileCheck %s
+
+CHECK: 2000-01-02 03:04

test/tools/llvm-ar/symtab.test

+## Test the s and S modifiers. Build and do not build a symbol table.
+
+# RUN: rm -f %t-*
+# RUN: yaml2obj %s -o %t.o
+# RUN: touch %t-other.txt
+
+## Default:
+# RUN: llvm-ar rc %t-default.a %t.o
+# RUN: llvm-nm --print-armap %t-default.a \
+# RUN:   | FileCheck %s --check-prefix=SYMTAB
+
+## Use a modifer:
+# RUN: llvm-ar rcs %t-symtab.a %t.o
+# RUN: llvm-nm --print-armap %t-symtab.a \
+# RUN:   | FileCheck %s --check-prefix=SYMTAB
+
+# RUN: llvm-ar rcS %t-no-symtab.a %t.o
+# RUN: llvm-nm --print-armap %t-no-symtab.a \
+# RUN:   | FileCheck %s --check-prefix=NO-SYMTAB
+
+## Use both modifers:
+# RUN: llvm-ar rcSs %t-symtab-last.a %t.o
+# RUN: llvm-nm --print-armap %t-symtab-last.a \
+# RUN:   | FileCheck %s --check-prefix=SYMTAB
+
+# RUN: llvm-ar rcsS %t-no-symtab-last.a %t.o
+# RUN: llvm-nm --print-armap %t-no-symtab-last.a \
+# RUN:   | FileCheck %s --check-prefix=NO-SYMTAB
+
+## Use an existing archive:
+# RUN: llvm-ar rcS %t-to-symtab.a %t.o
+# RUN: llvm-ar rs %t-to-symtab.a %t-other.txt
+# RUN: llvm-nm --print-armap %t-to-symtab.a \
+# RUN:   | FileCheck %s --check-prefix=SYMTAB
+
+# RUN: llvm-ar rs %t-to-symtab.a %t-other.txt
+# RUN: llvm-nm --print-armap %t-to-symtab.a \
+# RUN:   | FileCheck %s --check-prefix=SYMTAB
+
+# RUN: llvm-ar rcs %t-to-no-symtab.a %t.o
+# RUN: llvm-ar rS %t-to-no-symtab.a %t-other.txt
+# RUN: llvm-nm --print-armap %t-to-no-symtab.a \
+# RUN:   | FileCheck %s --check-prefix=NO-SYMTAB
+
+# RUN: llvm-ar rS %t-to-no-symtab.a %t-other.txt
+# RUN: llvm-nm --print-armap %t-to-no-symtab.a \
+# RUN:   | FileCheck %s --check-prefix=NO-SYMTAB
+
+# SYMTAB:        symbol in
+# NO-SYMTAB-NOT: symbol in
+
+--- !ELF
+FileHeader:
+  Class:   ELFCLASS64
+  Data:    ELFDATA2LSB
+  Type:    ET_REL
+  Machine: EM_X86_64
+Sections:
+  - Name: .text
+    Type: SHT_PROGBITS
+Symbols:
+  - Name:    symbol
+    Binding: STB_GLOBAL
+    Section: .text