1 ; RUN: llc -mtriple=mips -relocation-model=static < %s \
2 ; RUN: | FileCheck --check-prefixes=ALL,SYM32,O32,O32BE %s
3 ; RUN: llc -mtriple=mipsel -relocation-model=static < %s \
4 ; RUN: | FileCheck --check-prefixes=ALL,SYM32,O32,O32LE %s
6 ; RUN-TODO: llc -mtriple=mips64 -relocation-model=static -target-abi o32 < %s \
7 ; RUN-TODO: | FileCheck --check-prefixes=ALL,SYM32,O32 %s
8 ; RUN-TODO: llc -mtriple=mips64el -relocation-model=static -target-abi o32 < %s \
9 ; RUN-TODO: | FileCheck --check-prefixes=ALL,SYM32,O32 %s
11 ; RUN: llc -mtriple=mips64 -relocation-model=static -target-abi n32 < %s \
12 ; RUN: | FileCheck --check-prefixes=ALL,SYM32,N32,NEW,NEWBE %s
13 ; RUN: llc -mtriple=mips64el -relocation-model=static -target-abi n32 < %s \
14 ; RUN: | FileCheck --check-prefixes=ALL,SYM32,N32,NEW,NEWLE %s
16 ; RUN: llc -mtriple=mips64 -relocation-model=static -target-abi n64 < %s \
17 ; RUN: | FileCheck --check-prefixes=ALL,SYM64,N64,NEW,NEWBE %s
18 ; RUN: llc -mtriple=mips64el -relocation-model=static -target-abi n64 < %s \
19 ; RUN: | FileCheck --check-prefixes=ALL,SYM64,N64,NEW,NEWLE %s
21 ; Test the effect of varargs on floating point types in the non-variable part
22 ; of the argument list as specified by section 2 of the MIPSpro N32 Handbook.
24 ; N32/N64 are almost identical in this area so many of their checks have been
25 ; combined into the 'NEW' prefix (the N stands for New).
27 ; On O32, varargs prevents all FPU argument register usage. This contradicts
28 ; the N32 handbook, but agrees with the SYSV ABI and GCC's behaviour.
30 @floats = global [11 x float] zeroinitializer
31 @doubles = global [11 x double] zeroinitializer
33 define void @double_args(double %a, ...)
36 %0 = getelementptr [11 x double], ptr @doubles, i32 0, i32 1
37 store volatile double %a, ptr %0
40 call void @llvm.va_start(ptr %ap)
41 %b = va_arg ptr %ap, double
42 %1 = getelementptr [11 x double], ptr @doubles, i32 0, i32 2
43 store volatile double %b, ptr %1
44 call void @llvm.va_end(ptr %ap)
48 ; ALL-LABEL: double_args:
49 ; We won't test the way the global address is calculated in this test. This is
50 ; just to get the register number for the other checks.
51 ; SYM32-DAG: addiu [[R2:\$[0-9]+]], ${{[0-9]+}}, %lo(doubles)
52 ; SYM64-DAG: daddiu [[R2:\$[0-9]+]], ${{[0-9]+}}, %lo(doubles)
54 ; O32 forbids using floating point registers for the non-variable portion.
56 ; O32BE-DAG: mtc1 $5, [[FTMP1:\$f[0-9]*[02468]+]]
57 ; O32BE-DAG: mtc1 $4, [[FTMP2:\$f[0-9]*[13579]+]]
58 ; O32LE-DAG: mtc1 $4, [[FTMP1:\$f[0-9]*[02468]+]]
59 ; O32LE-DAG: mtc1 $5, [[FTMP2:\$f[0-9]*[13579]+]]
60 ; O32-DAG: sdc1 [[FTMP1]], 8([[R2]])
61 ; NEW-DAG: sdc1 $f12, 8([[R2]])
63 ; The varargs portion is dumped to stack
64 ; O32-DAG: sw $6, 16($sp)
65 ; O32-DAG: sw $7, 20($sp)
66 ; NEW-DAG: sd $5, 8($sp)
67 ; NEW-DAG: sd $6, 16($sp)
68 ; NEW-DAG: sd $7, 24($sp)
69 ; NEW-DAG: sd $8, 32($sp)
70 ; NEW-DAG: sd $9, 40($sp)
71 ; NEW-DAG: sd $10, 48($sp)
72 ; NEW-DAG: sd $11, 56($sp)
74 ; Get the varargs pointer
75 ; O32 has 4 bytes padding, 4 bytes for the varargs pointer, and 8 bytes reserved
76 ; for arguments 1 and 2.
77 ; N32/N64 has 8 bytes for the varargs pointer, and no reserved area.
78 ; O32-DAG: addiu [[VAPTR:\$[0-9]+]], $sp, 16
79 ; O32-DAG: sw [[VAPTR]], 4($sp)
80 ; N32-DAG: addiu [[VAPTR:\$[0-9]+]], $sp, 8
81 ; N32-DAG: sw [[VAPTR]], 4($sp)
82 ; N64-DAG: daddiu [[VAPTR:\$[0-9]+]], $sp, 8
83 ; N64-DAG: sd [[VAPTR]], 0($sp)
85 ; Increment the pointer then get the varargs arg
86 ; LLVM will rebind the load to the stack pointer instead of the varargs pointer
87 ; during lowering. This is fine and doesn't change the behaviour.
88 ; O32-DAG: addiu [[VAPTR]], [[VAPTR]], 8
89 ; N32-DAG: addiu [[VAPTR]], [[VAPTR]], 8
90 ; N64-DAG: daddiu [[VAPTR]], [[VAPTR]], 8
91 ; O32-DAG: ldc1 [[FTMP1:\$f[0-9]+]], 16($sp)
92 ; NEW-DAG: ldc1 [[FTMP1:\$f[0-9]+]], 8($sp)
93 ; ALL-DAG: sdc1 [[FTMP1]], 16([[R2]])
95 define void @float_args(float %a, ...) nounwind {
97 %0 = getelementptr [11 x float], ptr @floats, i32 0, i32 1
98 store volatile float %a, ptr %0
101 call void @llvm.va_start(ptr %ap)
102 %b = va_arg ptr %ap, float
103 %1 = getelementptr [11 x float], ptr @floats, i32 0, i32 2
104 store volatile float %b, ptr %1
105 call void @llvm.va_end(ptr %ap)
109 ; ALL-LABEL: float_args:
110 ; We won't test the way the global address is calculated in this test. This is
111 ; just to get the register number for the other checks.
112 ; SYM32-DAG: addiu [[R2:\$[0-9]+]], ${{[0-9]+}}, %lo(floats)
113 ; SYM64-DAG: daddiu [[R2:\$[0-9]+]], ${{[0-9]+}}, %lo(floats)
115 ; The first four arguments are the same in O32/N32/N64.
116 ; The non-variable portion should be unaffected.
117 ; O32-DAG: mtc1 $4, $f0
118 ; O32-DAG: swc1 $f0, 4([[R2]])
119 ; NEW-DAG: swc1 $f12, 4([[R2]])
121 ; The varargs portion is dumped to stack
122 ; O32-DAG: sw $5, 12($sp)
123 ; O32-DAG: sw $6, 16($sp)
124 ; O32-DAG: sw $7, 20($sp)
125 ; NEW-DAG: sd $5, 8($sp)
126 ; NEW-DAG: sd $6, 16($sp)
127 ; NEW-DAG: sd $7, 24($sp)
128 ; NEW-DAG: sd $8, 32($sp)
129 ; NEW-DAG: sd $9, 40($sp)
130 ; NEW-DAG: sd $10, 48($sp)
131 ; NEW-DAG: sd $11, 56($sp)
133 ; Get the varargs pointer
134 ; O32 has 4 bytes padding, 4 bytes for the varargs pointer, and should have 8
135 ; bytes reserved for arguments 1 and 2 (the first float arg) but as discussed in
136 ; arguments-float.ll, GCC doesn't agree with MD00305 and treats floats as 4
137 ; bytes so we only have 12 bytes total.
138 ; N32/N64 has 8 bytes for the varargs pointer, and no reserved area.
139 ; O32-DAG: addiu [[VAPTR:\$[0-9]+]], $sp, 12
140 ; O32-DAG: sw [[VAPTR]], 4($sp)
141 ; N32-DAG: addiu [[VAPTR:\$[0-9]+]], $sp, 8
142 ; N32-DAG: sw [[VAPTR]], 4($sp)
143 ; N64-DAG: daddiu [[VAPTR:\$[0-9]+]], $sp, 8
144 ; N64-DAG: sd [[VAPTR]], 0($sp)
146 ; Increment the pointer then get the varargs arg
147 ; LLVM will rebind the load to the stack pointer instead of the varargs pointer
148 ; during lowering. This is fine and doesn't change the behaviour.
149 ; Also, in big-endian mode the offset must be increased by 4 to retrieve the
150 ; correct half of the argument slot.
152 ; O32-DAG: addiu [[VAPTR]], [[VAPTR]], 4
153 ; N32-DAG: addiu [[VAPTR]], [[VAPTR]], 8
154 ; N64-DAG: daddiu [[VAPTR]], [[VAPTR]], 8
155 ; O32-DAG: lwc1 [[FTMP1:\$f[0-9]+]], 12($sp)
156 ; NEWLE-DAG: lwc1 [[FTMP1:\$f[0-9]+]], 8($sp)
157 ; NEWBE-DAG: lwc1 [[FTMP1:\$f[0-9]+]], 12($sp)
158 ; ALL-DAG: swc1 [[FTMP1]], 8([[R2]])
160 declare void @llvm.va_start(ptr)
161 declare void @llvm.va_copy(ptr, ptr)
162 declare void @llvm.va_end(ptr)