[llvm-ar][test] Add to llvm-ar test coverage

[gbreynoo]

Summary

This diff is depends on D69665.

• Added handling of thin archives to symtab.test.
• Added handling of newlines to response.test.
• D69665 exposed behaviour regarding the use of -- on the command line. Added double-hyphen.test to cover this.

[MaskRay]

llvm/test/tools/llvm-ar/symtab.test

58

Join the two lines. It will not be too long.

llvm/test/tools/llvm-ar/double-hyphen.test

+## Test the use of "--" on the commandline
+
+# RUN: echo contents > %t.txt
+
+# RUN: rm -f %t.ar
+# RUN: llvm-ar rc -- %t.ar %t.txt 2>&1 | count 0
+
+# RUN: llvm-ar p %t.ar | FileCheck %s
+# CHECK: contents

llvm/test/tools/llvm-ar/response.test

 # RUN: llvm-ar rc @%t.response2.txt
 # RUN: llvm-ar p %t2.a | FileCheck %s --check-prefix=CONTENTS
 
 ## Arguments after the response file.
 # RUN: echo 'rc %t3.a' > %t.response3.txt
 # RUN: llvm-ar @%t.response3.txt %t.txt
 # RUN: llvm-ar p %t3.a | FileCheck %s --check-prefix=CONTENTS
 
+## Newlines
+# RUN: echo contents > %t.txt
+# RUN: echo rc %t4.a > %t.newline.txt
+# RUN: echo %t.txt >> %t.newline.txt
+# RUN: llvm-ar @%t.newline.txt
+# RUN: llvm-ar p %t4.a | FileCheck %s --check-prefix=CONTENTS
+
 # CONTENTS: contents
 
 ## rsp-quoting
 # RUN: not llvm-ar --rsp-quoting=foobar @%t.response1.txt 2>&1 | \
 # RUN:   FileCheck  %s --check-prefix=ERROR
 # ERROR: Invalid response file quoting style foobar
 
 # RUN: echo -e 'rc %/t.a blah\\foo' > %t-rsp.txt
 # RUN: not llvm-ar --rsp-quoting=windows @%t-rsp.txt 2>&1 | \
 # RUN:   FileCheck %s --check-prefix=WIN
 # WIN: error: blah\foo: {{[Nn]}}o such file or directory
 
 # RUN: not llvm-ar -rsp-quoting posix @%t-rsp.txt 2>&1 | \
 # RUN:   FileCheck %s --check-prefix=POSIX
 # POSIX: error: blahfoo: {{[Nn]}}o such file or directory

llvm/test/tools/llvm-ar/symtab.test

 # 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
 
+## Thin Archive:
+# RUN: rm -f %t-thin.a
+# RUN: llvm-ar rcT %t-thin.a %t.o
+# RUN: llvm-nm --print-armap %t-thin.a \
+# RUN:   | FileCheck %s --check-prefix=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