llvm-6502/test/Analysis/BasicAA/tailcall-modref.ll

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; RUN: llvm-as < %s | opt -basicaa -load-vn -gcse -instcombine |\
; RUN: llvm-dis | grep {ret i32 0}
declare void @foo(i32*)
declare void @bar()
define i32 @test() {
%A = alloca i32 ; <i32*> [#uses=3]
call void @foo( i32* %A )
%X = load i32* %A ; <i32> [#uses=1]
tail call void @bar( )
%Y = load i32* %A ; <i32> [#uses=1]
%Z = sub i32 %X, %Y ; <i32> [#uses=1]
ret i32 %Z
}