1; Loop Simplify should turn phi nodes like X = phi [X, Y]  into just Y, eliminating them.
2; RUN: llvm-upgrade < %s | llvm-as | opt -loopsimplify | llvm-dis | grep phi | count 6
3
4%A = weak global [3000000 x int] zeroinitializer		; <[3000000 x int]*> [#uses=1]
5%B = weak global [20000 x int] zeroinitializer		; <[20000 x int]*> [#uses=1]
6%C = weak global [100 x int] zeroinitializer		; <[100 x int]*> [#uses=1]
7%Z = weak global int 0		; <int*> [#uses=2]
8
9implementation   ; Functions:
10
11int %main() {
12entry:
13	tail call void %__main( )
14	br label %loopentry.1
15
16loopentry.1:		; preds = %loopexit.1, %entry
17	%indvar20 = phi uint [ 0, %entry ], [ %indvar.next21, %loopexit.1 ]		; <uint> [#uses=1]
18	%a.1 = phi int* [ getelementptr ([3000000 x int]* %A, int 0, int 0), %entry ], [ %inc.0, %loopexit.1 ]		; <int*> [#uses=1]
19	br label %no_exit.2
20
21no_exit.2:		; preds = %loopexit.2, %no_exit.2, %loopentry.1
22	%a.0.4.ph = phi int* [ %a.1, %loopentry.1 ], [ %inc.0, %loopexit.2 ], [ %a.0.4.ph, %no_exit.2 ]		; <int*> [#uses=3]
23	%b.1.4.ph = phi int* [ getelementptr ([20000 x int]* %B, int 0, int 0), %loopentry.1 ], [ %inc.1, %loopexit.2 ], [ %b.1.4.ph, %no_exit.2 ]		; <int*> [#uses=3]
24	%indvar17 = phi uint [ 0, %loopentry.1 ], [ %indvar.next18, %loopexit.2 ], [ %indvar17, %no_exit.2 ]		; <uint> [#uses=2]
25	%indvar = phi uint [ %indvar.next, %no_exit.2 ], [ 0, %loopexit.2 ], [ 0, %loopentry.1 ]		; <uint> [#uses=5]
26	%b.1.4.rec = cast uint %indvar to int		; <int> [#uses=1]
27	%c.2.4 = getelementptr [100 x int]* %C, int 0, uint %indvar		; <int*> [#uses=1]
28	%a.0.4 = getelementptr int* %a.0.4.ph, uint %indvar		; <int*> [#uses=1]
29	%b.1.4 = getelementptr int* %b.1.4.ph, uint %indvar		; <int*> [#uses=1]
30	%inc.0.rec = add int %b.1.4.rec, 1		; <int> [#uses=2]
31	%inc.0 = getelementptr int* %a.0.4.ph, int %inc.0.rec		; <int*> [#uses=2]
32	%tmp.13 = load int* %a.0.4		; <int> [#uses=1]
33	%inc.1 = getelementptr int* %b.1.4.ph, int %inc.0.rec		; <int*> [#uses=1]
34	%tmp.15 = load int* %b.1.4		; <int> [#uses=1]
35	%tmp.18 = load int* %c.2.4		; <int> [#uses=1]
36	%tmp.16 = mul int %tmp.15, %tmp.13		; <int> [#uses=1]
37	%tmp.19 = mul int %tmp.16, %tmp.18		; <int> [#uses=1]
38	%tmp.20 = load int* %Z		; <int> [#uses=1]
39	%tmp.21 = add int %tmp.19, %tmp.20		; <int> [#uses=1]
40	store int %tmp.21, int* %Z
41	%indvar.next = add uint %indvar, 1		; <uint> [#uses=2]
42	%exitcond = seteq uint %indvar.next, 100		; <bool> [#uses=1]
43	br bool %exitcond, label %loopexit.2, label %no_exit.2
44
45loopexit.2:		; preds = %no_exit.2
46	%indvar.next18 = add uint %indvar17, 1		; <uint> [#uses=2]
47	%exitcond19 = seteq uint %indvar.next18, 200		; <bool> [#uses=1]
48	br bool %exitcond19, label %loopexit.1, label %no_exit.2
49
50loopexit.1:		; preds = %loopexit.2
51	%indvar.next21 = add uint %indvar20, 1		; <uint> [#uses=2]
52	%exitcond22 = seteq uint %indvar.next21, 300		; <bool> [#uses=1]
53	br bool %exitcond22, label %return, label %loopentry.1
54
55return:		; preds = %loopexit.1
56	ret int undef
57}
58
59declare void %__main()
60