1; RUN: opt < %s -callsite-splitting -verify-dom-info -S | FileCheck %s
2
3;CHECK-LABEL: @caller
4;CHECK-LABEL: Top.split:
5;CHECK: %ca1 = musttail call i8* @callee(i8* null, i8* %b)
6;CHECK: %cb2 = bitcast i8* %ca1 to i8*
7;CHECK: ret i8* %cb2
8;CHECK-LABEL: TBB.split
9;CHECK: %ca3 = musttail call i8* @callee(i8* nonnull %a, i8* null)
10;CHECK: %cb4 = bitcast i8* %ca3 to i8*
11;CHECK: ret i8* %cb4
12define i8* @caller(i8* %a, i8* %b) {
13Top:
14  %c = icmp eq i8* %a, null
15  br i1 %c, label %Tail, label %TBB
16TBB:
17  %c2 = icmp eq i8* %b, null
18  br i1 %c2, label %Tail, label %End
19Tail:
20  %ca = musttail call i8* @callee(i8* %a, i8* %b)
21  %cb = bitcast i8* %ca to i8*
22  ret i8* %cb
23End:
24  ret i8* null
25}
26
27define i8* @callee(i8* %a, i8* %b) noinline {
28  ret i8* %a
29}
30
31;CHECK-LABEL: @no_cast_caller
32;CHECK-LABEL: Top.split:
33;CHECK: %ca1 = musttail call i8* @callee(i8* null, i8* %b)
34;CHECK: ret i8* %ca1
35;CHECK-LABEL: TBB.split
36;CHECK: %ca2 = musttail call i8* @callee(i8* nonnull %a, i8* null)
37;CHECK: ret i8* %ca2
38define i8* @no_cast_caller(i8* %a, i8* %b) {
39Top:
40  %c = icmp eq i8* %a, null
41  br i1 %c, label %Tail, label %TBB
42TBB:
43  %c2 = icmp eq i8* %b, null
44  br i1 %c2, label %Tail, label %End
45Tail:
46  %ca = musttail call i8* @callee(i8* %a, i8* %b)
47  ret i8* %ca
48End:
49  ret i8* null
50}
51
52;CHECK-LABEL: @void_caller
53;CHECK-LABEL: Top.split:
54;CHECK: musttail call void @void_callee(i8* null, i8* %b)
55;CHECK: ret void
56;CHECK-LABEL: TBB.split
57;CHECK: musttail call void @void_callee(i8* nonnull %a, i8* null)
58;CHECK: ret void
59define void @void_caller(i8* %a, i8* %b) {
60Top:
61  %c = icmp eq i8* %a, null
62  br i1 %c, label %Tail, label %TBB
63TBB:
64  %c2 = icmp eq i8* %b, null
65  br i1 %c2, label %Tail, label %End
66Tail:
67  musttail call void @void_callee(i8* %a, i8* %b)
68  ret void
69End:
70  ret void
71}
72
73define void @void_callee(i8* %a, i8* %b) noinline {
74  ret void
75}
76
77;   Include a test with a larger CFG that exercises the DomTreeUpdater
78;   machinery a bit more.
79;CHECK-LABEL: @larger_cfg_caller
80;CHECK-LABEL: Top.split:
81;CHECK: %r1 = musttail call i8* @callee(i8* null, i8* %b)
82;CHECK: ret i8* %r1
83;CHECK-LABEL: TBB.split
84;CHECK: %r2 = musttail call i8* @callee(i8* nonnull %a, i8* null)
85;CHECK: ret i8* %r2
86define i8* @larger_cfg_caller(i8* %a, i8* %b) {
87Top:
88  %cond1 = icmp eq i8* %a, null
89  br i1 %cond1, label %Tail, label %ExtraTest
90ExtraTest:
91  %a0 = load i8, i8* %a
92  %cond2 = icmp eq i8 %a0, 0
93  br i1 %cond2, label %TBB_pred, label %End
94TBB_pred:
95  br label %TBB
96TBB:
97  %cond3 = icmp eq i8* %b, null
98  br i1 %cond3, label %Tail, label %End
99Tail:
100  %r = musttail call i8* @callee(i8* %a, i8* %b)
101  ret i8* %r
102End:
103  ret i8* null
104}
105