1; RUN: llc < %s -march=x86 > %t
2; RUN: not grep neg %t
3; RUN: not grep sub.*esp %t
4; RUN: not grep esi %t
5; RUN: not grep push %t
6
7; This corresponds to:
8;int t(int a, int b) {
9;  while (a != b) {
10;    if (a > b)
11;      a -= b;
12;    else
13;      b -= a;
14;  }
15;  return a;
16;}
17
18
19define i32 @t(i32 %a, i32 %b) nounwind {
20entry:
21	%tmp1434 = icmp eq i32 %a, %b		; <i1> [#uses=1]
22	br i1 %tmp1434, label %bb17, label %bb.outer
23
24bb.outer:		; preds = %cond_false, %entry
25	%b_addr.021.0.ph = phi i32 [ %b, %entry ], [ %tmp10, %cond_false ]		; <i32> [#uses=5]
26	%a_addr.026.0.ph = phi i32 [ %a, %entry ], [ %a_addr.026.0, %cond_false ]		; <i32> [#uses=1]
27	br label %bb
28
29bb:		; preds = %cond_true, %bb.outer
30	%indvar = phi i32 [ 0, %bb.outer ], [ %indvar.next, %cond_true ]		; <i32> [#uses=2]
31	%tmp. = sub i32 0, %b_addr.021.0.ph		; <i32> [#uses=1]
32	%tmp.40 = mul i32 %indvar, %tmp.		; <i32> [#uses=1]
33	%a_addr.026.0 = add i32 %tmp.40, %a_addr.026.0.ph		; <i32> [#uses=6]
34	%tmp3 = icmp sgt i32 %a_addr.026.0, %b_addr.021.0.ph		; <i1> [#uses=1]
35	br i1 %tmp3, label %cond_true, label %cond_false
36
37cond_true:		; preds = %bb
38	%tmp7 = sub i32 %a_addr.026.0, %b_addr.021.0.ph		; <i32> [#uses=2]
39	%tmp1437 = icmp eq i32 %tmp7, %b_addr.021.0.ph		; <i1> [#uses=1]
40	%indvar.next = add i32 %indvar, 1		; <i32> [#uses=1]
41	br i1 %tmp1437, label %bb17, label %bb
42
43cond_false:		; preds = %bb
44	%tmp10 = sub i32 %b_addr.021.0.ph, %a_addr.026.0		; <i32> [#uses=2]
45	%tmp14 = icmp eq i32 %a_addr.026.0, %tmp10		; <i1> [#uses=1]
46	br i1 %tmp14, label %bb17, label %bb.outer
47
48bb17:		; preds = %cond_false, %cond_true, %entry
49	%a_addr.026.1 = phi i32 [ %a, %entry ], [ %tmp7, %cond_true ], [ %a_addr.026.0, %cond_false ]		; <i32> [#uses=1]
50	ret i32 %a_addr.026.1
51}
52