[llvm] [SystemZ][z/OS] Add z/OS archive writing support (PR #200087)

[James Henderson via llvm-commits]

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@@ -35,20 +37,31 @@
 # LONG-LIST: very_long_member_name.txt
 # LONG-CONTENT: xyz
 
+## Use LLVM bitcode here so the test remains target-independent. The archive
+## writer only needs a symbolic input in order to emit the archive symbol table.
 ## A z/OS archive with real symbols should write a readable symbol table.
-# RUN: printf 'define i32 @mytest() {\nentry:\n  ret i32 87\n}\n' > %t.dir/mytest.ll
 # RUN: llvm-as %t.dir/mytest.ll -o %t.dir/mytest.bc
 # RUN: llvm-ar rcD --format=zos %t.sym.a %t.dir/mytest.bc
 # RUN: llvm-nm --print-armap %t.sym.a | FileCheck %s --check-prefix=SYMTAB
 
 # SYMTAB: Archive map
 # SYMTAB-NEXT: mytest in mytest.bc
+# SYMTAB-NOT: {{^  in mytest.bc$}}
 
 ## A z/OS archive with no real symbols should still write the dummy blank symbol.
-# RUN: printf 'source_filename = "blank.ll"\n' > %t.dir/blank.ll
 # RUN: llvm-as %t.dir/blank.ll -o %t.dir/blank.bc
 # RUN: llvm-ar rcD --format=zos %t.blank-sym.a %t.dir/blank.bc
 # RUN: llvm-nm --print-armap %t.blank-sym.a | FileCheck %s --check-prefix=EMPTY-SYMTAB
 
 # EMPTY-SYMTAB: Archive map
 # EMPTY-SYMTAB-NEXT: {{^  in blank.bc$}}
+# EMPTY-SYMTAB-NOT: {{^.+ in blank.bc$}}
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jh7370 wrote:

Similar comment to above: just checking "in blank.bc" should probably be enough, without the extra regex bits.

https://github.com/llvm/llvm-project/pull/200087