diff --git a/llvm/test/CodeGen/Generic/externally_available.ll b/llvm/test/CodeGen/Generic/externally_available.ll
--- a/llvm/test/CodeGen/Generic/externally_available.ll
+++ b/llvm/test/CodeGen/Generic/externally_available.ll
@@ -1,5 +1,11 @@
 ; RUN: llc -verify-machine-dom-info < %s | not grep test_
 
+; XFAIL: aix
+; AIX system assembler default print error for undefined reference .
+; so AIX chose to emit the available externally symbols into .s,
+; so that users won't run into errors in situations like:
+; clang -target powerpc-ibm-aix -xc -<<<$'extern inline __attribute__((__gnu_inline__)) void foo() {}\nvoid bar() { foo(); }' -O -Xclang -disable-llvm-passes
+
 ; test_function should not be emitted to the .s file.
 define available_externally i32 @test_function() {
   ret i32 4