1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=mips-unknown-linux-gnu -mips-tail-calls=1 < %s | FileCheck %s --check-prefix=MIPS32
; RUN: llc -mtriple=mips64-unknown-linux-gnu -mips-tail-calls=1 < %s | FileCheck %s --check-prefix=MIPS64
; Test musttail support for MIPS
define dso_local i32 @callee_args(i32 %a, i32 %b, i32 %c) {
; MIPS32-LABEL: callee_args:
; MIPS32: # %bb.0:
; MIPS32-NEXT: jr $ra
; MIPS32-NEXT: move $2, $4
;
; MIPS64-LABEL: callee_args:
; MIPS64: # %bb.0:
; MIPS64-NEXT: jr $ra
; MIPS64-NEXT: sll $2, $4, 0
ret i32 %a;
}
define i32 @test_musttail_args(i32 %x, i32 %y, i32 %z) {
; MIPS32-LABEL: test_musttail_args:
; MIPS32: # %bb.0:
; MIPS32-NEXT: j callee_args
; MIPS32-NEXT: nop
;
; MIPS64-LABEL: test_musttail_args:
; MIPS64: # %bb.0:
; MIPS64-NEXT: j callee_args
; MIPS64-NEXT: nop
%ret = musttail call i32 @callee_args(i32 %x, i32 %y, i32 %z)
ret i32 %ret
}
; Test musttail with many arguments that spill to stack (involves memory)
; MIPS O32 ABI: first 4 args in $a0-$a3, rest on stack
define hidden i32 @many_args_callee(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h) {
; MIPS32-LABEL: many_args_callee:
; MIPS32: # %bb.0:
; MIPS32-NEXT: jr $ra
; MIPS32-NEXT: move $2, $4
;
; MIPS64-LABEL: many_args_callee:
; MIPS64: # %bb.0:
; MIPS64-NEXT: jr $ra
; MIPS64-NEXT: sll $2, $4, 0
ret i32 %a
}
define i32 @test_musttail_many_args(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h) {
; MIPS32-LABEL: test_musttail_many_args:
; MIPS32: # %bb.0:
; MIPS32-NEXT: lw $1, 24($sp)
; MIPS32-NEXT: lw $2, 20($sp)
; MIPS32-NEXT: lw $3, 16($sp)
; MIPS32-NEXT: sw $3, 16($sp)
; MIPS32-NEXT: sw $2, 20($sp)
; MIPS32-NEXT: sw $1, 24($sp)
; MIPS32-NEXT: lw $1, 28($sp)
; MIPS32-NEXT: j many_args_callee
; MIPS32-NEXT: sw $1, 28($sp)
;
; MIPS64-LABEL: test_musttail_many_args:
; MIPS64: # %bb.0:
; MIPS64-NEXT: j many_args_callee
; MIPS64-NEXT: nop
%ret = musttail call i32 @many_args_callee(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h)
ret i32 %ret
}
; Test musttail with large struct passed by value (involves memory)
%struct.large = type { i32, i32, i32, i32, i32, i32, i32, i32 }
define hidden i32 @callee_with_struct(%struct.large %s, i32 %x) {
; MIPS32-LABEL: callee_with_struct:
; MIPS32: # %bb.0:
; MIPS32-NEXT: lw $2, 32($sp)
; MIPS32-NEXT: jr $ra
; MIPS32-NEXT: nop
;
; MIPS64-LABEL: callee_with_struct:
; MIPS64: # %bb.0:
; MIPS64-NEXT: lw $2, 4($sp)
; MIPS64-NEXT: jr $ra
; MIPS64-NEXT: nop
ret i32 %x
}
define i32 @test_musttail_struct(%struct.large %s, i32 %x) {
; MIPS32-LABEL: test_musttail_struct:
; MIPS32: # %bb.0:
; MIPS32-NEXT: lw $1, 28($sp)
; MIPS32-NEXT: lw $2, 24($sp)
; MIPS32-NEXT: lw $3, 20($sp)
; MIPS32-NEXT: lw $8, 16($sp)
; MIPS32-NEXT: sw $8, 16($sp)
; MIPS32-NEXT: sw $3, 20($sp)
; MIPS32-NEXT: sw $2, 24($sp)
; MIPS32-NEXT: sw $1, 28($sp)
; MIPS32-NEXT: lw $1, 32($sp)
; MIPS32-NEXT: j callee_with_struct
; MIPS32-NEXT: sw $1, 32($sp)
;
; MIPS64-LABEL: test_musttail_struct:
; MIPS64: # %bb.0:
; MIPS64-NEXT: ld $1, 0($sp)
; MIPS64-NEXT: j callee_with_struct
; MIPS64-NEXT: sd $1, 0($sp)
%ret = musttail call i32 @callee_with_struct(%struct.large %s, i32 %x)
ret i32 %ret
}
; Test musttail with mixed int and float arguments that use stack
define hidden float @mixed_args_callee(i32 %a, float %b, i32 %c, float %d, i32 %e, float %f) {
; MIPS32-LABEL: mixed_args_callee:
; MIPS32: # %bb.0:
; MIPS32-NEXT: jr $ra
; MIPS32-NEXT: mtc1 $5, $f0
;
; MIPS64-LABEL: mixed_args_callee:
; MIPS64: # %bb.0:
; MIPS64-NEXT: jr $ra
; MIPS64-NEXT: mov.s $f0, $f13
ret float %b
}
define float @test_musttail_mixed_args(i32 %a, float %b, i32 %c, float %d, i32 %e, float %f) {
; MIPS32-LABEL: test_musttail_mixed_args:
; MIPS32: # %bb.0:
; MIPS32-NEXT: lw $1, 16($sp)
; MIPS32-NEXT: sw $1, 16($sp)
; MIPS32-NEXT: lwc1 $f0, 20($sp)
; MIPS32-NEXT: j mixed_args_callee
; MIPS32-NEXT: swc1 $f0, 20($sp)
;
; MIPS64-LABEL: test_musttail_mixed_args:
; MIPS64: # %bb.0:
; MIPS64-NEXT: j mixed_args_callee
; MIPS64-NEXT: nop
%ret = musttail call float @mixed_args_callee(i32 %a, float %b, i32 %c, float %d, i32 %e, float %f)
ret float %ret
}
; Test musttail with indirect call
define i32 @test_musttail_fptr(ptr %fptr, i32 %x) {
; MIPS32-LABEL: test_musttail_fptr:
; MIPS32: # %bb.0:
; MIPS32-NEXT: move $25, $4
; MIPS32-NEXT: jr $25
; MIPS32-NEXT: nop
;
; MIPS64-LABEL: test_musttail_fptr:
; MIPS64: # %bb.0:
; MIPS64-NEXT: move $25, $4
; MIPS64-NEXT: jr $25
; MIPS64-NEXT: nop
%ret = musttail call i32 %fptr(ptr %fptr, i32 %x)
ret i32 %ret
}
|
