1; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -tailcallopt | FileCheck %s --check-prefixes=SDAG,COMMON
2; RUN: llc -global-isel -global-isel-abort=1 -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -tailcallopt | FileCheck %s --check-prefixes=GISEL,COMMON
3
4declare fastcc void @callee_stack0()
5declare fastcc void @callee_stack8([8 x i64], i64)
6declare fastcc void @callee_stack16([8 x i64], i64, i64)
7declare extern_weak fastcc void @callee_weak()
8
9define fastcc void @caller_to0_from0() nounwind {
10; COMMON-LABEL: caller_to0_from0:
11; COMMON-NEXT: // %bb.
12
13  tail call fastcc void @callee_stack0()
14  ret void
15
16; COMMON-NEXT: b callee_stack0
17}
18
19define fastcc void @caller_to0_from8([8 x i64], i64) {
20; COMMON-LABEL: caller_to0_from8:
21
22  tail call fastcc void @callee_stack0()
23  ret void
24
25; COMMON: add sp, sp, #16
26; COMMON-NEXT: b callee_stack0
27}
28
29define fastcc void @caller_to8_from0() {
30; COMMON-LABEL: caller_to8_from0:
31; COMMON: sub sp, sp, #32
32
33; Key point is that the "42" should go #16 below incoming stack
34; pointer (we didn't have arg space to reuse).
35  tail call fastcc void @callee_stack8([8 x i64] undef, i64 42)
36  ret void
37
38; COMMON: str {{x[0-9]+}}, [sp, #16]!
39; COMMON-NEXT: b callee_stack8
40}
41
42define fastcc void @caller_to8_from8([8 x i64], i64 %a) {
43; COMMON-LABEL: caller_to8_from8:
44; COMMON: sub sp, sp, #16
45
46; Key point is that the "%a" should go where at SP on entry.
47  tail call fastcc void @callee_stack8([8 x i64] undef, i64 42)
48  ret void
49
50; COMMON: str {{x[0-9]+}}, [sp, #16]!
51; COMMON-NEXT: b callee_stack8
52}
53
54define fastcc void @caller_to16_from8([8 x i64], i64 %a) {
55; COMMON-LABEL: caller_to16_from8:
56; COMMON: sub sp, sp, #16
57
58; Important point is that the call reuses the "dead" argument space
59; above %a on the stack. If it tries to go below incoming-SP then the
60; callee will not deallocate the space, even in fastcc.
61  tail call fastcc void @callee_stack16([8 x i64] undef, i64 42, i64 2)
62
63; COMMON: stp {{x[0-9]+}}, {{x[0-9]+}}, [sp, #16]!
64; COMMON-NEXT: b callee_stack16
65  ret void
66}
67
68
69define fastcc void @caller_to8_from24([8 x i64], i64 %a, i64 %b, i64 %c) {
70; COMMON-LABEL: caller_to8_from24:
71; COMMON: sub sp, sp, #16
72
73; Key point is that the "%a" should go where at #16 above SP on entry.
74  tail call fastcc void @callee_stack8([8 x i64] undef, i64 42)
75  ret void
76
77; COMMON: str {{x[0-9]+}}, [sp, #32]!
78; COMMON-NEXT: b callee_stack8
79}
80
81
82define fastcc void @caller_to16_from16([8 x i64], i64 %a, i64 %b) {
83; COMMON-LABEL: caller_to16_from16:
84; COMMON: sub sp, sp, #16
85
86; Here we want to make sure that both loads happen before the stores:
87; otherwise either %a or %b will be wrongly clobbered.
88  tail call fastcc void @callee_stack16([8 x i64] undef, i64 %b, i64 %a)
89  ret void
90
91; COMMON: ldp {{x[0-9]+}}, {{x[0-9]+}}, [sp, #16]
92; COMMON: stp {{x[0-9]+}}, {{x[0-9]+}}, [sp, #16]!
93; COMMON-NEXT: b callee_stack16
94}
95
96define fastcc void @disable_tail_calls() nounwind "disable-tail-calls"="true" {
97; COMMON-LABEL: disable_tail_calls:
98; COMMON-NEXT: // %bb.
99
100  tail call fastcc void @callee_stack0()
101  ret void
102
103; COMMON: bl callee_stack0
104; COMMON: ret
105}
106
107; Weakly-referenced extern functions cannot be tail-called, as AAELF does
108; not define the behaviour of branch instructions to undefined weak symbols.
109define fastcc void @caller_weak() {
110; COMMON-LABEL: caller_weak:
111; COMMON: bl callee_weak
112  tail call void @callee_weak()
113  ret void
114}
115
116declare { [2 x float] } @get_vec2()
117
118define { [3 x float] } @test_add_elem() {
119; SDAG-LABEL: test_add_elem:
120; SDAG: bl get_vec2
121; SDAG: fmov s2, #1.0
122; SDAG: ret
123; GISEL-LABEL: test_add_elem:
124; GISEL: str	x30, [sp, #-16]!
125; GISEL: bl get_vec2
126; GISEL: fmov	s2, #1.0
127; GISEL: ldr	x30, [sp], #16
128; GISEL: ret
129
130  %call = tail call { [2 x float] } @get_vec2()
131  %arr = extractvalue { [2 x float] } %call, 0
132  %arr.0 = extractvalue [2 x float] %arr, 0
133  %arr.1 = extractvalue [2 x float] %arr, 1
134
135  %res.0 = insertvalue { [3 x float] } undef, float %arr.0, 0, 0
136  %res.01 = insertvalue { [3 x float] } %res.0, float %arr.1, 0, 1
137  %res.012 = insertvalue { [3 x float] } %res.01, float 1.000000e+00, 0, 2
138  ret { [3 x float] } %res.012
139}
140
141declare double @get_double()
142define { double, [2 x double] } @test_mismatched_insert() {
143; COMMON-LABEL: test_mismatched_insert:
144; COMMON: bl get_double
145; COMMON: bl get_double
146; COMMON: bl get_double
147; COMMON: ret
148
149  %val0 = call double @get_double()
150  %val1 = call double @get_double()
151  %val2 = tail call double @get_double()
152
153  %res.0 = insertvalue { double, [2 x double] } undef, double %val0, 0
154  %res.01 = insertvalue { double, [2 x double] } %res.0, double %val1, 1, 0
155  %res.012 = insertvalue { double, [2 x double] } %res.01, double %val2, 1, 1
156
157  ret { double, [2 x double] } %res.012
158}
159