llvm-project/llvm/test/Transforms/FunctionAttrs/2008-09-03-Mutual.ll

; RUN: opt < %s -functionattrs -S | grep readnone

define i32 @a() {
	%tmp = call i32 @b( )		; <i32> [#uses=1]
	ret i32 %tmp
}

define i32 @b() {
	%tmp = call i32 @a( )		; <i32> [#uses=1]
	ret i32 %tmp
}