1; RUN: llc -march=mips -relocation-model=static < %s | FileCheck --check-prefix=ALL --check-prefix=SYM32 --check-prefix=O32 --check-prefix=O32BE %s 2; RUN: llc -march=mipsel -relocation-model=static < %s | FileCheck --check-prefix=ALL --check-prefix=SYM32 --check-prefix=O32 --check-prefix=O32LE %s 3 4; RUN-TODO: llc -march=mips64 -relocation-model=static -mattr=-n64,+o32 < %s | FileCheck --check-prefix=ALL --check-prefix=SYM32 --check-prefix=O32 %s 5; RUN-TODO: llc -march=mips64el -relocation-model=static -mattr=-n64,+o32 < %s | FileCheck --check-prefix=ALL --check-prefix=SYM32 --check-prefix=O32 %s 6 7; RUN: llc -march=mips64 -relocation-model=static -mattr=-n64,+n32 < %s | FileCheck --check-prefix=ALL --check-prefix=SYM32 --check-prefix=N32 --check-prefix=NEW %s 8; RUN: llc -march=mips64el -relocation-model=static -mattr=-n64,+n32 < %s | FileCheck --check-prefix=ALL --check-prefix=SYM32 --check-prefix=N32 --check-prefix=NEW %s 9 10; RUN: llc -march=mips64 -relocation-model=static -mattr=-n64,+n64 < %s | FileCheck --check-prefix=ALL --check-prefix=SYM64 --check-prefix=N64 --check-prefix=NEW %s 11; RUN: llc -march=mips64el -relocation-model=static -mattr=-n64,+n64 < %s | FileCheck --check-prefix=ALL --check-prefix=SYM64 --check-prefix=N64 --check-prefix=NEW %s 12 13; Test the effect of varargs on floating point types in the non-variable part 14; of the argument list as specified by section 2 of the MIPSpro N32 Handbook. 15; 16; N32/N64 are almost identical in this area so many of their checks have been 17; combined into the 'NEW' prefix (the N stands for New). 18; 19; On O32, varargs prevents all FPU argument register usage. This contradicts 20; the N32 handbook, but agrees with the SYSV ABI and GCC's behaviour. 21 22@floats = global [11 x float] zeroinitializer 23@doubles = global [11 x double] zeroinitializer 24 25define void @double_args(double %a, ...) 26 nounwind { 27entry: 28 %0 = getelementptr [11 x double]* @doubles, i32 0, i32 1 29 store volatile double %a, double* %0 30 31 %ap = alloca i8* 32 %ap2 = bitcast i8** %ap to i8* 33 call void @llvm.va_start(i8* %ap2) 34 %b = va_arg i8** %ap, double 35 %1 = getelementptr [11 x double]* @doubles, i32 0, i32 2 36 store volatile double %b, double* %1 37 ret void 38} 39 40; ALL-LABEL: double_args: 41; We won't test the way the global address is calculated in this test. This is 42; just to get the register number for the other checks. 43; SYM32-DAG: addiu [[R2:\$[0-9]+]], ${{[0-9]+}}, %lo(doubles) 44; SYM64-DAG: ld [[R2:\$[0-9]]], %got_disp(doubles)( 45 46; O32 forbids using floating point registers for the non-variable portion. 47; N32/N64 allow it. 48; O32BE-DAG: mtc1 $5, [[FTMP1:\$f[0-9]*[02468]+]] 49; O32BE-DAG: mtc1 $4, [[FTMP2:\$f[0-9]*[13579]+]] 50; O32LE-DAG: mtc1 $4, [[FTMP1:\$f[0-9]*[02468]+]] 51; O32LE-DAG: mtc1 $5, [[FTMP2:\$f[0-9]*[13579]+]] 52; O32-DAG: sdc1 [[FTMP1]], 8([[R2]]) 53; NEW-DAG: sdc1 $f12, 8([[R2]]) 54 55; The varargs portion is dumped to stack 56; O32-DAG: sw $6, 16($sp) 57; O32-DAG: sw $7, 20($sp) 58; NEW-DAG: sd $5, 8($sp) 59; NEW-DAG: sd $6, 16($sp) 60; NEW-DAG: sd $7, 24($sp) 61; NEW-DAG: sd $8, 32($sp) 62; NEW-DAG: sd $9, 40($sp) 63; NEW-DAG: sd $10, 48($sp) 64; NEW-DAG: sd $11, 56($sp) 65 66; Get the varargs pointer 67; O32 has 4 bytes padding, 4 bytes for the varargs pointer, and 8 bytes reserved 68; for arguments 1 and 2. 69; N32/N64 has 8 bytes for the varargs pointer, and no reserved area. 70; O32-DAG: addiu [[VAPTR:\$[0-9]+]], $sp, 16 71; O32-DAG: sw [[VAPTR]], 4($sp) 72; N32-DAG: addiu [[VAPTR:\$[0-9]+]], $sp, 8 73; N32-DAG: sw [[VAPTR]], 4($sp) 74; N64-DAG: daddiu [[VAPTR:\$[0-9]+]], $sp, 8 75; N64-DAG: sd [[VAPTR]], 0($sp) 76 77; Increment the pointer then get the varargs arg 78; LLVM will rebind the load to the stack pointer instead of the varargs pointer 79; during lowering. This is fine and doesn't change the behaviour. 80; O32-DAG: addiu [[VAPTR]], [[VAPTR]], 8 81; O32-DAG: sw [[VAPTR]], 4($sp) 82; N32-DAG: addiu [[VAPTR]], [[VAPTR]], 8 83; N32-DAG: sw [[VAPTR]], 4($sp) 84; N64-DAG: daddiu [[VAPTR]], [[VAPTR]], 8 85; N64-DAG: sd [[VAPTR]], 0($sp) 86; O32-DAG: ldc1 [[FTMP1:\$f[0-9]+]], 16($sp) 87; NEW-DAG: ldc1 [[FTMP1:\$f[0-9]+]], 8($sp) 88; ALL-DAG: sdc1 [[FTMP1]], 16([[R2]]) 89 90define void @float_args(float %a, ...) nounwind { 91entry: 92 %0 = getelementptr [11 x float]* @floats, i32 0, i32 1 93 store volatile float %a, float* %0 94 95 %ap = alloca i8* 96 %ap2 = bitcast i8** %ap to i8* 97 call void @llvm.va_start(i8* %ap2) 98 %b = va_arg i8** %ap, float 99 %1 = getelementptr [11 x float]* @floats, i32 0, i32 2 100 store volatile float %b, float* %1 101 ret void 102} 103 104; ALL-LABEL: float_args: 105; We won't test the way the global address is calculated in this test. This is 106; just to get the register number for the other checks. 107; SYM32-DAG: addiu [[R2:\$[0-9]+]], ${{[0-9]+}}, %lo(floats) 108; SYM64-DAG: ld [[R2:\$[0-9]]], %got_disp(floats)( 109 110; The first four arguments are the same in O32/N32/N64. 111; The non-variable portion should be unaffected. 112; O32-DAG: sw $4, 4([[R2]]) 113; NEW-DAG: swc1 $f12, 4([[R2]]) 114 115; The varargs portion is dumped to stack 116; O32-DAG: sw $5, 12($sp) 117; O32-DAG: sw $6, 16($sp) 118; O32-DAG: sw $7, 20($sp) 119; NEW-DAG: sd $5, 8($sp) 120; NEW-DAG: sd $6, 16($sp) 121; NEW-DAG: sd $7, 24($sp) 122; NEW-DAG: sd $8, 32($sp) 123; NEW-DAG: sd $9, 40($sp) 124; NEW-DAG: sd $10, 48($sp) 125; NEW-DAG: sd $11, 56($sp) 126 127; Get the varargs pointer 128; O32 has 4 bytes padding, 4 bytes for the varargs pointer, and should have 8 129; bytes reserved for arguments 1 and 2 (the first float arg) but as discussed in 130; arguments-float.ll, GCC doesn't agree with MD00305 and treats floats as 4 131; bytes so we only have 12 bytes total. 132; N32/N64 has 8 bytes for the varargs pointer, and no reserved area. 133; O32-DAG: addiu [[VAPTR:\$[0-9]+]], $sp, 12 134; O32-DAG: sw [[VAPTR]], 4($sp) 135; N32-DAG: addiu [[VAPTR:\$[0-9]+]], $sp, 8 136; N32-DAG: sw [[VAPTR]], 4($sp) 137; N64-DAG: daddiu [[VAPTR:\$[0-9]+]], $sp, 8 138; N64-DAG: sd [[VAPTR]], 0($sp) 139 140; Increment the pointer then get the varargs arg 141; LLVM will rebind the load to the stack pointer instead of the varargs pointer 142; during lowering. This is fine and doesn't change the behaviour. 143; N32/N64 is using ori instead of addiu/daddiu but (although odd) this is fine 144; since the stack is always aligned. 145; O32-DAG: addiu [[VAPTR]], [[VAPTR]], 4 146; O32-DAG: sw [[VAPTR]], 4($sp) 147; N32-DAG: ori [[VAPTR]], [[VAPTR]], 4 148; N32-DAG: sw [[VAPTR]], 4($sp) 149; N64-DAG: ori [[VAPTR]], [[VAPTR]], 4 150; N64-DAG: sd [[VAPTR]], 0($sp) 151; O32-DAG: lwc1 [[FTMP1:\$f[0-9]+]], 12($sp) 152; NEW-DAG: lwc1 [[FTMP1:\$f[0-9]+]], 8($sp) 153; ALL-DAG: swc1 [[FTMP1]], 8([[R2]]) 154 155declare void @llvm.va_start(i8*) 156declare void @llvm.va_copy(i8*, i8*) 157declare void @llvm.va_end(i8*) 158