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
159
160
161
|
; RUN: llc -march=mips -relocation-model=static < %s | FileCheck --check-prefix=ALL --check-prefix=SYM32 --check-prefix=O32 --check-prefix=O32BE %s
; RUN: llc -march=mipsel -relocation-model=static < %s | FileCheck --check-prefix=ALL --check-prefix=SYM32 --check-prefix=O32 --check-prefix=O32LE %s
; RUN-TODO: llc -march=mips64 -relocation-model=static -target-abi o32 < %s | FileCheck --check-prefix=ALL --check-prefix=SYM32 --check-prefix=O32 %s
; RUN-TODO: llc -march=mips64el -relocation-model=static -target-abi o32 < %s | FileCheck --check-prefix=ALL --check-prefix=SYM32 --check-prefix=O32 %s
; RUN: llc -march=mips64 -relocation-model=static -target-abi n32 < %s | FileCheck --check-prefix=ALL --check-prefix=SYM32 --check-prefix=N32 --check-prefix=NEW --check-prefix=NEWBE %s
; RUN: llc -march=mips64el -relocation-model=static -target-abi n32 < %s | FileCheck --check-prefix=ALL --check-prefix=SYM32 --check-prefix=N32 --check-prefix=NEW --check-prefix=NEWLE %s
; RUN: llc -march=mips64 -relocation-model=static -target-abi n64 < %s | FileCheck --check-prefix=ALL --check-prefix=SYM64 --check-prefix=N64 --check-prefix=NEW --check-prefix=NEWBE %s
; RUN: llc -march=mips64el -relocation-model=static -target-abi n64 < %s | FileCheck --check-prefix=ALL --check-prefix=SYM64 --check-prefix=N64 --check-prefix=NEW --check-prefix=NEWLE %s
; Test the effect of varargs on floating point types in the non-variable part
; of the argument list as specified by section 2 of the MIPSpro N32 Handbook.
;
; N32/N64 are almost identical in this area so many of their checks have been
; combined into the 'NEW' prefix (the N stands for New).
;
; On O32, varargs prevents all FPU argument register usage. This contradicts
; the N32 handbook, but agrees with the SYSV ABI and GCC's behaviour.
@floats = global [11 x float] zeroinitializer
@doubles = global [11 x double] zeroinitializer
define void @double_args(double %a, ...)
nounwind {
entry:
%0 = getelementptr [11 x double]* @doubles, i32 0, i32 1
store volatile double %a, double* %0
%ap = alloca i8*
%ap2 = bitcast i8** %ap to i8*
call void @llvm.va_start(i8* %ap2)
%b = va_arg i8** %ap, double
%1 = getelementptr [11 x double]* @doubles, i32 0, i32 2
store volatile double %b, double* %1
call void @llvm.va_end(i8* %ap2)
ret void
}
; ALL-LABEL: double_args:
; We won't test the way the global address is calculated in this test. This is
; just to get the register number for the other checks.
; SYM32-DAG: addiu [[R2:\$[0-9]+]], ${{[0-9]+}}, %lo(doubles)
; SYM64-DAG: ld [[R2:\$[0-9]]], %got_disp(doubles)(
; O32 forbids using floating point registers for the non-variable portion.
; N32/N64 allow it.
; O32BE-DAG: mtc1 $5, [[FTMP1:\$f[0-9]*[02468]+]]
; O32BE-DAG: mtc1 $4, [[FTMP2:\$f[0-9]*[13579]+]]
; O32LE-DAG: mtc1 $4, [[FTMP1:\$f[0-9]*[02468]+]]
; O32LE-DAG: mtc1 $5, [[FTMP2:\$f[0-9]*[13579]+]]
; O32-DAG: sdc1 [[FTMP1]], 8([[R2]])
; NEW-DAG: sdc1 $f12, 8([[R2]])
; The varargs portion is dumped to stack
; O32-DAG: sw $6, 16($sp)
; O32-DAG: sw $7, 20($sp)
; NEW-DAG: sd $5, 8($sp)
; NEW-DAG: sd $6, 16($sp)
; NEW-DAG: sd $7, 24($sp)
; NEW-DAG: sd $8, 32($sp)
; NEW-DAG: sd $9, 40($sp)
; NEW-DAG: sd $10, 48($sp)
; NEW-DAG: sd $11, 56($sp)
; Get the varargs pointer
; O32 has 4 bytes padding, 4 bytes for the varargs pointer, and 8 bytes reserved
; for arguments 1 and 2.
; N32/N64 has 8 bytes for the varargs pointer, and no reserved area.
; O32-DAG: addiu [[VAPTR:\$[0-9]+]], $sp, 16
; O32-DAG: sw [[VAPTR]], 4($sp)
; N32-DAG: addiu [[VAPTR:\$[0-9]+]], $sp, 8
; N32-DAG: sw [[VAPTR]], 4($sp)
; N64-DAG: daddiu [[VAPTR:\$[0-9]+]], $sp, 8
; N64-DAG: sd [[VAPTR]], 0($sp)
; Increment the pointer then get the varargs arg
; LLVM will rebind the load to the stack pointer instead of the varargs pointer
; during lowering. This is fine and doesn't change the behaviour.
; O32-DAG: addiu [[VAPTR]], [[VAPTR]], 8
; O32-DAG: sw [[VAPTR]], 4($sp)
; N32-DAG: addiu [[VAPTR]], [[VAPTR]], 8
; N32-DAG: sw [[VAPTR]], 4($sp)
; N64-DAG: daddiu [[VAPTR]], [[VAPTR]], 8
; N64-DAG: sd [[VAPTR]], 0($sp)
; O32-DAG: ldc1 [[FTMP1:\$f[0-9]+]], 16($sp)
; NEW-DAG: ldc1 [[FTMP1:\$f[0-9]+]], 8($sp)
; ALL-DAG: sdc1 [[FTMP1]], 16([[R2]])
define void @float_args(float %a, ...) nounwind {
entry:
%0 = getelementptr [11 x float]* @floats, i32 0, i32 1
store volatile float %a, float* %0
%ap = alloca i8*
%ap2 = bitcast i8** %ap to i8*
call void @llvm.va_start(i8* %ap2)
%b = va_arg i8** %ap, float
%1 = getelementptr [11 x float]* @floats, i32 0, i32 2
store volatile float %b, float* %1
call void @llvm.va_end(i8* %ap2)
ret void
}
; ALL-LABEL: float_args:
; We won't test the way the global address is calculated in this test. This is
; just to get the register number for the other checks.
; SYM32-DAG: addiu [[R2:\$[0-9]+]], ${{[0-9]+}}, %lo(floats)
; SYM64-DAG: ld [[R2:\$[0-9]]], %got_disp(floats)(
; The first four arguments are the same in O32/N32/N64.
; The non-variable portion should be unaffected.
; O32-DAG: sw $4, 4([[R2]])
; NEW-DAG: swc1 $f12, 4([[R2]])
; The varargs portion is dumped to stack
; O32-DAG: sw $5, 12($sp)
; O32-DAG: sw $6, 16($sp)
; O32-DAG: sw $7, 20($sp)
; NEW-DAG: sd $5, 8($sp)
; NEW-DAG: sd $6, 16($sp)
; NEW-DAG: sd $7, 24($sp)
; NEW-DAG: sd $8, 32($sp)
; NEW-DAG: sd $9, 40($sp)
; NEW-DAG: sd $10, 48($sp)
; NEW-DAG: sd $11, 56($sp)
; Get the varargs pointer
; O32 has 4 bytes padding, 4 bytes for the varargs pointer, and should have 8
; bytes reserved for arguments 1 and 2 (the first float arg) but as discussed in
; arguments-float.ll, GCC doesn't agree with MD00305 and treats floats as 4
; bytes so we only have 12 bytes total.
; N32/N64 has 8 bytes for the varargs pointer, and no reserved area.
; O32-DAG: addiu [[VAPTR:\$[0-9]+]], $sp, 12
; O32-DAG: sw [[VAPTR]], 4($sp)
; N32-DAG: addiu [[VAPTR:\$[0-9]+]], $sp, 8
; N32-DAG: sw [[VAPTR]], 4($sp)
; N64-DAG: daddiu [[VAPTR:\$[0-9]+]], $sp, 8
; N64-DAG: sd [[VAPTR]], 0($sp)
; Increment the pointer then get the varargs arg
; LLVM will rebind the load to the stack pointer instead of the varargs pointer
; during lowering. This is fine and doesn't change the behaviour.
; Also, in big-endian mode the offset must be increased by 4 to retrieve the
; correct half of the argument slot.
;
; O32-DAG: addiu [[VAPTR]], [[VAPTR]], 4
; O32-DAG: sw [[VAPTR]], 4($sp)
; N32-DAG: addiu [[VAPTR]], [[VAPTR]], 8
; N32-DAG: sw [[VAPTR]], 4($sp)
; N64-DAG: daddiu [[VAPTR]], [[VAPTR]], 8
; N64-DAG: sd [[VAPTR]], 0($sp)
; O32-DAG: lwc1 [[FTMP1:\$f[0-9]+]], 12($sp)
; NEWLE-DAG: lwc1 [[FTMP1:\$f[0-9]+]], 8($sp)
; NEWBE-DAG: lwc1 [[FTMP1:\$f[0-9]+]], 12($sp)
; ALL-DAG: swc1 [[FTMP1]], 8([[R2]])
declare void @llvm.va_start(i8*)
declare void @llvm.va_copy(i8*, i8*)
declare void @llvm.va_end(i8*)
|
