llvm-project

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# REQUIRES: x86
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# RUN: rm -rf %t; split-file %s %t
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos -o %t/foo.o %t/foo.s
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos -o %t/main.o %t/main.s
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# RUN: %lld -alias _foo _bar -u _bar -exported_symbol _bar %t/main.o %t/foo.o -o %t/bar.o
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# RUN: llvm-nm %t/bar.o | FileCheck %s --check-prefix=BAR
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# BAR: [[#%x,FOO_ADDR:]] T _bar
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# BAR: [[#FOO_ADDR]]     t _foo
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# RUN: not %lld -alias _missing _bar -alias _missing2 _baz %t/main.o -o %t/missing.o %s 2>&1 | FileCheck %s --check-prefix=MISSING
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# MISSING-DAG: undefined base symbol '_missing' for alias '_bar'
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# MISSING-DAG: undefined base symbol '_missing2' for alias '_baz'
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# RUN: %lld -alias _foo _main %t/foo.o -o %t/main_rename.o
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# RUN: llvm-nm %t/main_rename.o | FileCheck %s --check-prefix=MAIN
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# MAIN: [[#%x,FOO_ADDR:]] T _foo
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# MAIN: [[#FOO_ADDR]]     T _main
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## Verify dead stripping doesn't remove the aliased symbol. This behavior differs
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## from ld64 where it actually does dead strip only the alias, not the original symbol.
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# RUN: %lld -dead_strip -alias _foo _bar -alias _main _fake_main %t/main.o %t/foo.o -o %t/multiple.o
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# RUN: llvm-nm %t/multiple.o | FileCheck %s --check-prefix=MULTIPLE
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# MULTIPLE: [[#%x,FOO_ADDR:]]  T _bar
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# MULTIPLE: [[#%x,MAIN_ADDR:]] T _fake_main
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# MULTIPLE: [[#FOO_ADDR]]      T _foo
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# MULTIPLE: [[#MAIN_ADDR]]     T _main
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#--- foo.s
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.subsections_via_symbols
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.globl _foo
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_foo:
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  ret
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#--- main.s
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.subsections_via_symbols
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.globl _main
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_main:
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  ret
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