Failure seen if you configure ARM target but not AArch64, as here:
http://lab.llvm.org:8011/#/builders/59/builds/271
; Check that we accept functions with '$' in the name.
;
+; RUN: llc -mtriple=arm64-unknown-linux < %s | FileCheck --prefi=LINUX %s
; RUN: llc -mtriple=aarch64-unknown-linux < %s | FileCheck --check-prefix=LINUX %s
; RUN: llc -mtriple=aarch64-apple-darwin < %s | FileCheck --check-prefix=DARWIN %s
;
; Check that we accept functions with '$' in the name.
;
-; RUN: llc -mtriple=arm64-unknown-linux < %s | FileCheck --prefi=LINUX %s
; RUN: llc -mtriple=armv7-apple-darwin < %s | FileCheck --prefix=DARWIN %s
; RUN: llc -mtriple=armv7-apple-ios < %s | FileCheck --prefix=IOS %s
;