[llvm] [llvm-objcopy] Add llvm-objcopy option --set-visibility-sym (PR #80872)

[James Henderson via llvm-commits]

================
@@ -0,0 +1,155 @@
+
+# RUN: yaml2obj %s -o %t.o
+# RUN: echo '.*' > %t.symbols.regex
+
+# Check if the visibility of all symbols is properly set to DEFAULT
+# RUN: llvm-objcopy %t.o %t0.o --set-symbols-visibility=%t.symbols.regex=default --regex
+# RUN: llvm-readelf -s %t0.o | FileCheck %s --check-prefix=DEF
+
+# DEF-DAG: DEFAULT     1 default_local
+# DEF-DAG: DEFAULT     1 internal_local
+# DEF-DAG: DEFAULT     1 hidden_local
+# DEF-DAG: DEFAULT     1 protected_local
+# DEF-DAG: DEFAULT     1 default_global
+# DEF-DAG: DEFAULT     1 default_weak
+# DEF-DAG: DEFAULT     1 internal_global
+# DEF-DAG: DEFAULT     1 internal_weak
+# DEF-DAG: DEFAULT     1 hidden_global
+# DEF-DAG: DEFAULT     1 hidden_weak
+# DEF-DAG: DEFAULT     1 protected_global
+# DEF-DAG: DEFAULT     1 protected_weak
+
+
+# Check if the visibility of all symbols is properly set to HIDDEN
+# RUN: llvm-objcopy %t.o %t1.o --set-symbols-visibility=%t.symbols.regex=hidden --regex
+# RUN: llvm-readelf -s %t1.o | FileCheck %s --check-prefix=HID
+
+# HID-DAG: HIDDEN      1 default_local
+# HID-DAG: HIDDEN      1 internal_local
+# HID-DAG: HIDDEN      1 hidden_local
+# HID-DAG: HIDDEN      1 protected_local
+# HID-DAG: HIDDEN      1 default_global
+# HID-DAG: HIDDEN      1 default_weak
+# HID-DAG: HIDDEN      1 internal_global
+# HID-DAG: HIDDEN      1 internal_weak
+# HID-DAG: HIDDEN      1 hidden_global
+# HID-DAG: HIDDEN      1 hidden_weak
+# HID-DAG: HIDDEN      1 protected_global
+# HID-DAG: HIDDEN      1 protected_weak
+
+
+# Check if the visibility of all symbols is properly set to PROTECTED
+# RUN: llvm-objcopy %t.o %t2.o --set-symbols-visibility=%t.symbols.regex=protected --regex
+# RUN: llvm-readelf -s %t2.o | FileCheck %s --check-prefix=PRO
+
+# PRO-DAG: PROTECTED   1 default_local
+# PRO-DAG: PROTECTED   1 internal_local
+# PRO-DAG: PROTECTED   1 hidden_local
+# PRO-DAG: PROTECTED   1 protected_local
+# PRO-DAG: PROTECTED   1 default_global
+# PRO-DAG: PROTECTED   1 default_weak
+# PRO-DAG: PROTECTED   1 internal_global
+# PRO-DAG: PROTECTED   1 internal_weak
+# PRO-DAG: PROTECTED   1 hidden_global
+# PRO-DAG: PROTECTED   1 hidden_weak
+# PRO-DAG: PROTECTED   1 protected_global
+# PRO-DAG: PROTECTED   1 protected_weak
+
+
+# Check if the visibility of all symbols is properly set to INTERNAL
----------------
jh7370 wrote:

```suggestion
# Check that the visibility of all symbols is properly set to INTERNAL
```

https://github.com/llvm/llvm-project/pull/80872