; RUN: llvm-as < %s | llvm-dis > %t1.ll
; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
; RUN: diff %t1.ll %t2.ll
define i32 @foo() {
br label %"foo`~!@#$%^&*()-_=+{}[]\\\\|;:',<.>/?"
"foo`~!@#$%^&*()-_=+{}[]\\\\|;:',<.>/?": ; preds = %0
ret i32 17
}