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-rw-r--r--test/tools/llvm-ar/default-add.test17
1 files changed, 17 insertions, 0 deletions
diff --git a/test/tools/llvm-ar/default-add.test b/test/tools/llvm-ar/default-add.test
new file mode 100644
index 0000000000000..88719e4efce3c
--- /dev/null
+++ b/test/tools/llvm-ar/default-add.test
@@ -0,0 +1,17 @@
+RUN: yaml2obj %S/Inputs/macho.yaml -o %t-macho.o
+RUN: yaml2obj %S/Inputs/coff.yaml -o %t-coff.o
+
+RUN: rm -f %t.ar
+RUN: llvm-ar crs %t.ar %t-macho.o
+RUN: grep -q __.SYMDEF %t.ar
+RUN: llvm-ar crs %t.ar %t-coff.o
+RUN: grep -q __.SYMDEF %t.ar
+
+RUN: rm -f %t.ar
+RUN: llvm-ar crs %t.ar %t-coff.o
+RUN: not grep -q __.SYMDEF %t.ar
+RUN: llvm-ar crs %t.ar %t-macho.o
+RUN: not grep -q __.SYMDEF %t.ar
+
+Ensure that we select the existing format when updating.
+