1; RUN: opt -S -scalarrepl-ssa < %s | FileCheck %s
2; rdar://10589171
3
4target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
5target triple = "x86_64-unknown-linux-gnu"
6
7%struct.foo = type { i32, i32 }
8
9@.str = private unnamed_addr constant [6 x i8] c"x=%d\0A\00", align 1
10
11define i32 @main(i32 %argc, i8** nocapture %argv) nounwind uwtable {
12entry:
13  %f = alloca %struct.foo, align 4
14  %x.i = getelementptr inbounds %struct.foo* %f, i64 0, i32 0
15  store i32 1, i32* %x.i, align 4
16  %y.i = getelementptr inbounds %struct.foo* %f, i64 0, i32 1
17  br label %while.cond.i
18
19; CHECK: while.cond.i:
20; CHECK-NEXT: %tmp = phi i32 [ 1, %entry ], [ %tmp2, %while.cond.backedge.i ]
21; CHECK-NEXT: %pos.0.i = phi i32 [ 1, %entry ], [ %xtmp.i, %while.cond.backedge.i ]
22; CHECK-NEXT: %left.0.i = phi i32 [ 1, %entry ], [ %dec.i, %while.cond.backedge.i ]
23; CHECK-NOT: phi
24while.cond.i:                                     ; preds = %while.cond.backedge.i, %entry
25  %tmp = phi i32 [ 1, %entry ], [ %tmp2, %while.cond.backedge.i ]
26  %pos.0.i = phi i32 [ 1, %entry ], [ %xtmp.i, %while.cond.backedge.i ]
27  %left.0.i = phi i32 [ 1, %entry ], [ %dec.i, %while.cond.backedge.i ]
28  %cmp.i = icmp sgt i32 %left.0.i, 0
29  br i1 %cmp.i, label %while.body.i, label %while.cond.i.func.exit_crit_edge
30
31while.cond.i.func.exit_crit_edge:                 ; preds = %while.cond.i
32  br label %func.exit
33
34while.body.i:                                     ; preds = %while.cond.i
35  %dec.i = add nsw i32 %left.0.i, -1
36  switch i32 1, label %while.body.i.func.exit_crit_edge [
37    i32 0, label %while.cond.backedge.i
38    i32 1, label %sw.bb.i
39  ]
40
41while.body.i.func.exit_crit_edge:                 ; preds = %while.body.i
42  br label %func.exit
43
44sw.bb.i:                                          ; preds = %while.body.i
45  %cmp2.i = icmp eq i32 %tmp, 1
46  br i1 %cmp2.i, label %if.then.i, label %if.end.i
47
48if.then.i:                                        ; preds = %sw.bb.i
49  store i32 %pos.0.i, i32* %x.i, align 4
50  br label %if.end.i
51
52; CHECK: if.end.i:
53; CHECK-NEXT: %tmp1 = phi i32 [ %pos.0.i, %if.then.i ], [ %tmp, %sw.bb.i ]
54; CHECK-NOT: phi
55if.end.i:                                         ; preds = %if.then.i, %sw.bb.i
56  %tmp1 = phi i32 [ %pos.0.i, %if.then.i ], [ %tmp, %sw.bb.i ]
57  store i32 %tmp1, i32* %y.i, align 4
58  br label %while.cond.backedge.i
59
60; CHECK: while.cond.backedge.i:
61; CHECK-NEXT: %tmp2 = phi i32 [ %tmp1, %if.end.i ], [ %tmp, %while.body.i ]
62; CHECK-NOT: phi
63while.cond.backedge.i:                            ; preds = %if.end.i, %while.body.i
64  %tmp2 = phi i32 [ %tmp1, %if.end.i ], [ %tmp, %while.body.i ]
65  %xtmp.i = add i32 %pos.0.i, 1
66  br label %while.cond.i
67
68; CHECK: func.exit:
69; CHECK-NOT: load
70; CHECK: %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([6 x i8]* @.str, i64 0, i64 0), i32 %tmp) [[NUW:#[0-9]+]]
71func.exit:                                        ; preds = %while.body.i.func.exit_crit_edge, %while.cond.i.func.exit_crit_edge
72  %tmp3 = load i32* %x.i, align 4
73  %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([6 x i8]* @.str, i64 0, i64 0), i32 %tmp3) nounwind
74  ret i32 0
75}
76
77declare i32 @printf(i8* nocapture, ...) nounwind
78
79; CHECK: attributes #0 = { nounwind uwtable }
80; CHECK: attributes [[NUW]] = { nounwind }
81