llvm-6502/test/Analysis/Andersens/external.ll
2008-08-16 00:00:54 +00:00

21 lines
622 B
LLVM

; RUN: llvm-as < %s | opt -anders-aa -gvn -deadargelim | llvm-dis | grep store | not grep null
; Because the 'internal' function is passed to an external function, we don't
; know what the incoming values will alias. As such, we cannot do the
; optimization checked by the 'arg-must-alias.ll' test.
declare void @external(i32(i32*)*)
@G = internal constant i32* null
define internal i32 @internal(i32* %ARG) {
;;; We *DON'T* know that ARG always points to null!
store i32* %ARG, i32** @G
ret i32 0
}
define i32 @foo() {
call void @external(i32(i32*)* @internal)
%V = call i32 @internal(i32* null)
ret i32 %V
}