[llvm] [llvm-objcopy] Report unsupported formats before compression (PR #202357)

[James Henderson via llvm-commits]

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@@ -1,5 +1,7 @@
 # UNSUPPORTED: zstd
 # RUN: yaml2obj %p/Inputs/compress-debug-sections.yaml -o %t
-# RUN: not llvm-objcopy --compress-sections '.debug_foo=zstd' %t /dev/null 2>&1 | FileCheck %s -DFILE=%t
+# RUN: not llvm-objcopy --compress-sections '.debug_foo=zstd' %t /dev/null 2>&1 | FileCheck %s -DFILE=%t --check-prefix=CHECK1
+# RUN: not llvm-objcopy --compress-debug-sections=zstd %t /dev/null 2>&1 | FileCheck %s -DFILE=%t --check-prefix=CHECK2
 
-# CHECK: error: '[[FILE]]': failed to compress section '.debug_foo': LLVM was not built with LLVM_ENABLE_ZSTD or did not find zstd at build time
+# CHECK1: error: '[[FILE]]': failed to compress section '.debug_foo': LLVM was not built with LLVM_ENABLE_ZSTD or did not find zstd at build time
+# CHECK2: error: '[[FILE]]': failed to compress section '.debug_foo': LLVM was not built with LLVM_ENABLE_ZSTD or did not find zstd at build time
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jh7370 wrote:

As the messages are the same, you can reuse the same CHECK line. Just change CHECK1 -> CHECK2, delete the CHECK2 line, and drop the `--check-prefix` option from both FileCheck commands.

Same applies in other cases.

https://github.com/llvm/llvm-project/pull/202357