1; RUN: llc < %s -mtriple=x86_64-pc-win32 | FileCheck %s
2
3%struct.A = type { i8 }
4%struct.B = type { i32 }
5%struct.C = type { %struct.B }
6%struct.D = type { %struct.B }
7%struct.E = type { %struct.B }
8
9declare %struct.A* @A_ctor(%struct.A* returned)
10declare %struct.B* @B_ctor(%struct.B* returned, i32)
11
12declare %struct.A* @A_ctor_nothisret(%struct.A*)
13declare %struct.B* @B_ctor_nothisret(%struct.B*, i32)
14
15define %struct.C* @C_ctor(%struct.C* %this, i32 %y) {
16entry:
17; CHECK-LABEL: C_ctor:
18; CHECK: jmp     B_ctor                  # TAILCALL
19  %0 = getelementptr inbounds %struct.C* %this, i64 0, i32 0
20  %call = tail call %struct.B* @B_ctor(%struct.B* %0, i32 %y)
21  ret %struct.C* %this
22}
23
24define %struct.C* @C_ctor_nothisret(%struct.C* %this, i32 %y) {
25entry:
26; CHECK-LABEL: C_ctor_nothisret:
27; CHECK-NOT: jmp     B_ctor_nothisret
28  %0 = getelementptr inbounds %struct.C* %this, i64 0, i32 0
29  %call = tail call %struct.B* @B_ctor_nothisret(%struct.B* %0, i32 %y)
30  ret %struct.C* %this
31}
32
33define %struct.D* @D_ctor(%struct.D* %this, i32 %y) {
34entry:
35; CHECK-LABEL: D_ctor:
36; CHECK: movq    %rcx, [[SAVETHIS:%r[0-9a-z]+]]
37; CHECK: callq   A_ctor
38; CHECK: movq    [[SAVETHIS]], %rcx
39; CHECK: jmp     B_ctor                  # TAILCALL
40  %0 = bitcast %struct.D* %this to %struct.A*
41  %call = tail call %struct.A* @A_ctor(%struct.A* %0)
42  %1 = getelementptr inbounds %struct.D* %this, i64 0, i32 0
43  %call2 = tail call %struct.B* @B_ctor(%struct.B* %1, i32 %y)
44; (this next line would never be generated by Clang, actually)
45  %2 = bitcast %struct.A* %call to %struct.D*
46  ret %struct.D* %2
47}
48
49define %struct.D* @D_ctor_nothisret(%struct.D* %this, i32 %y) {
50entry:
51; CHECK-LABEL: D_ctor_nothisret:
52; CHECK: movq    %rcx, [[SAVETHIS:%r[0-9a-z]+]]
53; CHECK: callq   A_ctor_nothisret
54; CHECK: movq    [[SAVETHIS]], %rcx
55; CHECK-NOT: jmp     B_ctor_nothisret
56  %0 = bitcast %struct.D* %this to %struct.A*
57  %call = tail call %struct.A* @A_ctor_nothisret(%struct.A* %0)
58  %1 = getelementptr inbounds %struct.D* %this, i64 0, i32 0
59  %call2 = tail call %struct.B* @B_ctor_nothisret(%struct.B* %1, i32 %y)
60; (this next line would never be generated by Clang, actually)
61  %2 = bitcast %struct.A* %call to %struct.D*
62  ret %struct.D* %2
63}
64
65define %struct.E* @E_ctor(%struct.E* %this, i32 %x) {
66entry:
67; CHECK-LABEL: E_ctor:
68; CHECK: movq    %rcx, [[SAVETHIS:%r[0-9a-z]+]]
69; CHECK: callq   B_ctor
70; CHECK: movq    [[SAVETHIS]], %rcx
71; CHECK: jmp     B_ctor                  # TAILCALL
72  %b = getelementptr inbounds %struct.E* %this, i64 0, i32 0
73  %call = tail call %struct.B* @B_ctor(%struct.B* %b, i32 %x)
74  %call4 = tail call %struct.B* @B_ctor(%struct.B* %b, i32 %x)
75  ret %struct.E* %this
76}
77
78define %struct.E* @E_ctor_nothisret(%struct.E* %this, i32 %x) {
79entry:
80; CHECK-LABEL: E_ctor_nothisret:
81; CHECK: movq    %rcx, [[SAVETHIS:%r[0-9a-z]+]]
82; CHECK: callq   B_ctor_nothisret
83; CHECK: movq    [[SAVETHIS]], %rcx
84; CHECK-NOT: jmp     B_ctor_nothisret
85  %b = getelementptr inbounds %struct.E* %this, i64 0, i32 0
86  %call = tail call %struct.B* @B_ctor_nothisret(%struct.B* %b, i32 %x)
87  %call4 = tail call %struct.B* @B_ctor_nothisret(%struct.B* %b, i32 %x)
88  ret %struct.E* %this
89}
90