Implementation notes: amd64, oki, crypto_encrypt/mcnie4q1922

Computer: oki
Architecture: amd64
CPU ID: GenuineIntel-00050654-bfebfbff
SUPERCOP version: 20181123
Operation: crypto_encrypt
Primitive: mcnie4q1922

Time	Object size	Test size	Implementation	Compiler	Benchmark date	SUPERCOP version
11361066	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx2_-O3_-fomit-frame-pointer`	20190122	20181123
11369462	? ? ?	? ? ?	`ref`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv`	20190122	20181123
11404580	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=native_-mtune=native_-O3_-fomit-frame-pointer`	20190122	20181123
11478010	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7-avx_-O3_-fomit-frame-pointer`	20190122	20181123
11480544	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx-i_-O3_-fomit-frame-pointer`	20190122	20181123
11481430	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-O3_-fomit-frame-pointer`	20190122	20181123
11560792	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7_-O3_-fomit-frame-pointer`	20190122	20181123
11569956	? ? ?	? ? ?	`ref`	`gcc_-m64_-O3_-fomit-frame-pointer`	20190122	20181123
11574920	? ? ?	? ? ?	`ref`	`gcc_-O3_-fomit-frame-pointer`	20190122	20181123
11575076	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4.1_-O3_-fomit-frame-pointer`	20190122	20181123
11582658	? ? ?	? ? ?	`ref`	`gcc_-fno-schedule-insns_-O3_-fomit-frame-pointer`	20190122	20181123
11622862	? ? ?	? ? ?	`ref`	`gcc_-march=k8_-O3_-fomit-frame-pointer`	20190122	20181123
11629402	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=k8_-O3_-fomit-frame-pointer`	20190122	20181123
11641512	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4_-O3_-fomit-frame-pointer`	20190122	20181123
11788992	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-fno-schedule-insns_-O3_-fomit-frame-pointer`	20190122	20181123
11789002	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-O3_-fomit-frame-pointer`	20190122	20181123
11794038	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-O3_-fomit-frame-pointer`	20190122	20181123
11808438	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-O2_-fomit-frame-pointer`	20190122	20181123
11809178	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-fno-schedule-insns_-O2_-fomit-frame-pointer`	20190122	20181123
11823456	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-O2_-fomit-frame-pointer`	20190122	20181123
11826712	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=k8_-O2_-fomit-frame-pointer`	20190122	20181123
11839004	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=native_-mtune=native_-O2_-fomit-frame-pointer`	20190122	20181123
11848318	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=k8_-O2_-fomit-frame-pointer`	20190122	20181123
11866524	? ? ?	? ? ?	`ref`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv`	20190122	20181123
11959780	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx2_-O2_-fomit-frame-pointer`	20190122	20181123
11967990	? ? ?	? ? ?	`ref`	`gcc_-O2_-fomit-frame-pointer`	20190122	20181123
11982738	? ? ?	? ? ?	`ref`	`gcc_-fno-schedule-insns_-O2_-fomit-frame-pointer`	20190122	20181123
11987628	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=k8_-O3_-fomit-frame-pointer`	20190122	20181123
11992278	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=k8_-O3_-fomit-frame-pointer`	20190122	20181123
12027620	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx-i_-O2_-fomit-frame-pointer`	20190122	20181123
12030626	? ? ?	? ? ?	`ref`	`gcc_-march=k8_-O2_-fomit-frame-pointer`	20190122	20181123
12032326	? ? ?	? ? ?	`ref`	`gcc_-m64_-O2_-fomit-frame-pointer`	20190122	20181123
12037476	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=k8_-O2_-fomit-frame-pointer`	20190122	20181123
12050908	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4.1_-O2_-fomit-frame-pointer`	20190122	20181123
12054104	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4_-O2_-fomit-frame-pointer`	20190122	20181123
12063120	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7-avx_-O2_-fomit-frame-pointer`	20190122	20181123
12068738	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-O2_-fomit-frame-pointer`	20190122	20181123
12182242	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7_-O2_-fomit-frame-pointer`	20190122	20181123
12683026	? ? ?	? ? ?	`ref`	`clang_-mcpu=native_-mfpu=neon_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments`	20190122	20181123
12691490	? ? ?	? ? ?	`ref`	`clang_-mcpu=cortex-a8_-mfpu=neon_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments`	20190122	20181123
12713152	? ? ?	? ? ?	`ref`	`clang_-mcpu=cortex-a9_-mfpu=neon_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments`	20190122	20181123
12729376	? ? ?	? ? ?	`ref`	`clang_-O3_-fomit-frame-pointer_-Qunused-arguments`	20190122	20181123
12733484	? ? ?	? ? ?	`ref`	`clang_-O3_-fwrapv_-mavx_-maes_-mpclmul_-fomit-frame-pointer_-Qunused-arguments`	20190122	20181123
12754980	? ? ?	? ? ?	`ref`	`clang_-O3_-fwrapv_-mavx2_-fomit-frame-pointer_-Qunused-arguments`	20190122	20181123
12755518	? ? ?	? ? ?	`ref`	`clang_-O3_-fwrapv_-march=x86-64_-mcpu=core-avx2_-mavx2_-maes_-mpclmul_-fomit-frame-pointer_-Qunused-arguments`	20190122	20181123
12758550	? ? ?	? ? ?	`ref`	`clang_-O3_-fwrapv_-mavx_-fomit-frame-pointer_-Qunused-arguments`	20190122	20181123
16734896	? ? ?	? ? ?	`ref`	`gcc_-m64_-O_-fomit-frame-pointer`	20190122	20181123
16735214	? ? ?	? ? ?	`ref`	`gcc_-O_-fomit-frame-pointer`	20190122	20181123
16761114	? ? ?	? ? ?	`ref`	`gcc_-fno-schedule-insns_-O_-fomit-frame-pointer`	20190122	20181123
17081240	? ? ?	? ? ?	`ref`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv`	20190122	20181123
17320924	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4.1_-O_-fomit-frame-pointer`	20190122	20181123
17327566	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx2_-O_-fomit-frame-pointer`	20190122	20181123
17343688	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-O_-fomit-frame-pointer`	20190122	20181123
17344498	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4_-O_-fomit-frame-pointer`	20190122	20181123
17365324	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7_-O_-fomit-frame-pointer`	20190122	20181123
18308952	? ? ?	? ? ?	`ref`	`gcc_-march=k8_-O_-fomit-frame-pointer`	20190122	20181123
18329070	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=k8_-O_-fomit-frame-pointer`	20190122	20181123
18463048	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7-avx_-O_-fomit-frame-pointer`	20190122	20181123
18484778	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx-i_-O_-fomit-frame-pointer`	20190122	20181123
18628160	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-O_-fomit-frame-pointer`	20190122	20181123
18644082	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-fno-schedule-insns_-O_-fomit-frame-pointer`	20190122	20181123
18676368	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-O_-fomit-frame-pointer`	20190122	20181123
18767592	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=k8_-O_-fomit-frame-pointer`	20190122	20181123
18784468	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=k8_-O_-fomit-frame-pointer`	20190122	20181123
24712384	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=native_-mtune=native_-O_-fomit-frame-pointer`	20190122	20181123
37705206	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=barcelona_-O_-fomit-frame-pointer`	20190122	20181123
37707698	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=barcelona_-O_-fomit-frame-pointer`	20190122	20181123
38657334	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=nocona_-O3_-fomit-frame-pointer`	20190122	20181123
38670124	? ? ?	? ? ?	`ref`	`gcc_-march=nocona_-O3_-fomit-frame-pointer`	20190122	20181123
39027950	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=nocona_-O2_-fomit-frame-pointer`	20190122	20181123
39032652	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=nocona_-O3_-fomit-frame-pointer`	20190122	20181123
39038490	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=nocona_-O3_-fomit-frame-pointer`	20190122	20181123
39039980	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=nocona_-O2_-fomit-frame-pointer`	20190122	20181123
39263786	? ? ?	? ? ?	`ref`	`gcc_-march=nocona_-O2_-fomit-frame-pointer`	20190122	20181123
39273220	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=nocona_-O2_-fomit-frame-pointer`	20190122	20181123
39815744	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=nocona_-O_-fomit-frame-pointer`	20190122	20181123
39864086	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=nocona_-O_-fomit-frame-pointer`	20190122	20181123
39890752	? ? ?	? ? ?	`ref`	`gcc_-march=barcelona_-O3_-fomit-frame-pointer`	20190122	20181123
39901006	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=barcelona_-O3_-fomit-frame-pointer`	20190122	20181123
39993102	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=barcelona_-O_-fomit-frame-pointer`	20190122	20181123
40014626	? ? ?	? ? ?	`ref`	`gcc_-march=barcelona_-O_-fomit-frame-pointer`	20190122	20181123
40226246	? ? ?	? ? ?	`ref`	`gcc_-march=nocona_-O_-fomit-frame-pointer`	20190122	20181123
40229696	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=nocona_-O_-fomit-frame-pointer`	20190122	20181123
40343078	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=barcelona_-O2_-fomit-frame-pointer`	20190122	20181123
40351038	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=barcelona_-O2_-fomit-frame-pointer`	20190122	20181123
40391686	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=barcelona_-O3_-fomit-frame-pointer`	20190122	20181123
40400734	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=barcelona_-O3_-fomit-frame-pointer`	20190122	20181123
40531696	? ? ?	? ? ?	`ref`	`gcc_-march=barcelona_-O2_-fomit-frame-pointer`	20190122	20181123
40551398	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=barcelona_-O2_-fomit-frame-pointer`	20190122	20181123
41012442	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=barcelona_-Os_-fomit-frame-pointer`	20190122	20181123
41043730	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=barcelona_-Os_-fomit-frame-pointer`	20190122	20181123
41126478	? ? ?	? ? ?	`ref`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv`	20190122	20181123
41149838	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=k8_-Os_-fomit-frame-pointer`	20190122	20181123
41153802	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=k8_-Os_-fomit-frame-pointer`	20190122	20181123
41200302	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx-i_-Os_-fomit-frame-pointer`	20190122	20181123
41206218	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7-avx_-Os_-fomit-frame-pointer`	20190122	20181123
41416548	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=corei7_-Os_-fomit-frame-pointer`	20190122	20181123
41454938	? ? ?	? ? ?	`ref`	`gcc_-fno-schedule-insns_-Os_-fomit-frame-pointer`	20190122	20181123
41464522	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-Os_-fomit-frame-pointer`	20190122	20181123
41470798	? ? ?	? ? ?	`ref`	`gcc_-m64_-Os_-fomit-frame-pointer`	20190122	20181123
41473392	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-fno-schedule-insns_-Os_-fomit-frame-pointer`	20190122	20181123
41491070	? ? ?	? ? ?	`ref`	`gcc_-Os_-fomit-frame-pointer`	20190122	20181123
41494318	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-Os_-fomit-frame-pointer`	20190122	20181123
41651420	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=nocona_-Os_-fomit-frame-pointer`	20190122	20181123
41658512	? ? ?	? ? ?	`ref`	`gcc_-march=nocona_-Os_-fomit-frame-pointer`	20190122	20181123
41693772	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-Os_-fomit-frame-pointer`	20190122	20181123
41727938	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4.1_-Os_-fomit-frame-pointer`	20190122	20181123
41732672	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core2_-msse4_-Os_-fomit-frame-pointer`	20190122	20181123
41739122	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=k8_-Os_-fomit-frame-pointer`	20190122	20181123
41744508	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=barcelona_-Os_-fomit-frame-pointer`	20190122	20181123
41746078	? ? ?	? ? ?	`ref`	`gcc_-march=k8_-Os_-fomit-frame-pointer`	20190122	20181123
41779566	? ? ?	? ? ?	`ref`	`gcc_-march=barcelona_-Os_-fomit-frame-pointer`	20190122	20181123
41920638	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=nocona_-Os_-fomit-frame-pointer`	20190122	20181123
41996426	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-m64_-march=nocona_-Os_-fomit-frame-pointer`	20190122	20181123
42002282	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=core-avx2_-Os_-fomit-frame-pointer`	20190122	20181123
42271908	? ? ?	? ? ?	`ref`	`gcc_-m64_-march=native_-mtune=native_-Os_-fomit-frame-pointer`	20190122	20181123
65293420	? ? ?	? ? ?	`ref`	`cc`	20190122	20181123
65309836	? ? ?	? ? ?	`ref`	`gcc`	20190122	20181123
65318614	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops`	20190122	20181123

Compiler output

Implementation: ref
Security model: unknown
Compiler: clang -O3 -fwrapv -march=native -fomit-frame-pointer -Qunused-arguments

try.c: fatal error: error in backend: Cannot select: 0x1bcb1c0: v4i64 = X86ISD::VTRUNC 0x1bcaff0
try.c: 0x1bcaff0: v16i32 = vselect 0x1ba8d20, 0x1b4d190, 0x1bcaec0
try.c: 0x1ba8d20: v4i1 = X86ISD::PCMPGTM 0x1bb4ab0, 0x1b4df40
try.c: 0x1bb4ab0: v4i64 = X86ISD::VBROADCAST 0x1b4e2d0
try.c: 0x1b4e2d0: i64,ch = load<LD8[%uglygep72]> 0x1aaedd0, 0x1b948e0, undef:i64
try.c: 0x1b948e0: i64 = add 0x1bb5990, 0x1b601d0
try.c: 0x1bb5990: i64 = X86ISD::Wrapper TargetGlobalAddress:i64<[64 x i64]* @cycles> 0
try.c: 0x1b5eeb0: i64 = TargetGlobalAddress<[64 x i64]* @cycles> 0
try.c: 0x1b601d0: i64 = shl 0x1b5e660, Constant:i8<3>
try.c: 0x1b5e660: i64,ch = CopyFromReg 0x1aaedd0, Register:i64 %vreg50
try.c: 0x1bb5e50: i64 = Register %vreg50
try.c: 0x1b31220: i8 = Constant<3>
try.c: 0x1bb3120: i64 = undef
try.c: 0x1b4df40: v4i64,ch = CopyFromReg 0x1aaedd0, Register:v4i64 %vreg13
try.c: 0x1b59420: v4i64 = Register %vreg13
try.c: 0x1b4d190: v16i32 = X86ISD::VBROADCAST 0x1b5e8c0
try.c: 0x1b5e8c0: i32,ch = load<LD4[ConstantPool]> 0x1aaedd0, 0x1bcab30, undef:i64
try.c: 0x1bcab30: i64 = X86ISD::Wrapper TargetConstantPool:i64<i32 1> 0
try.c: 0x1b49080: i64 = TargetConstantPool<i32 1> 0
try.c: 0x1bb3120: i64 = undef
try.c: 0x1bcaec0: v16i32 = BUILD_VECTOR Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>
try.c: 0x1bcad90: i32 = Constant<0>
try.c: 0x1bcad90: i32 = Constant<0>
try.c: 0x1bcad90: i32 = Constant<0>
try.c: 0x1bcad90: i32 = Constant<0>
try.c: ...

Number of similar (compiler,implementation) pairs: 1, namely:

Compiler	Implementations
clang -O3 -fwrapv -march=native -fomit-frame-pointer -Qunused-arguments	ref

Compiler output

Implementation: ref
Security model: unknown
Compiler: clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments

try.c: fatal error: error in backend: Cannot select: 0x1229ef0: v4i64 = X86ISD::VTRUNC 0x1229d20
try.c: 0x1229d20: v16i32 = vselect 0x1245af0, 0x11bca90, 0x1229bf0
try.c: 0x1245af0: v4i1 = X86ISD::PCMPGTM 0x121d8a0, 0x11bd840
try.c: 0x121d8a0: v4i64 = X86ISD::VBROADCAST 0x11bdbd0
try.c: 0x11bdbd0: i64,ch = load<LD8[%uglygep72]> 0x1120dd0, 0x12241c0, undef:i64
try.c: 0x12241c0: i64 = add 0x1226830, 0x11c5a80
try.c: 0x1226830: i64 = X86ISD::Wrapper TargetGlobalAddress:i64<[64 x i64]* @cycles> 0
try.c: 0x1220f70: i64 = TargetGlobalAddress<[64 x i64]* @cycles> 0
try.c: 0x11c5a80: i64 = shl 0x1220720, Constant:i8<3>
try.c: 0x1220720: i64,ch = CopyFromReg 0x1120dd0, Register:i64 %vreg50
try.c: 0x1226cf0: i64 = Register %vreg50
try.c: 0x11cd0c0: i8 = Constant<3>
try.c: 0x1224fd0: i64 = undef
try.c: 0x11bd840: v4i64,ch = CopyFromReg 0x1120dd0, Register:v4i64 %vreg13
try.c: 0x11e76a0: v4i64 = Register %vreg13
try.c: 0x11bca90: v16i32 = X86ISD::VBROADCAST 0x1220980
try.c: 0x1220980: i32,ch = load<LD4[ConstantPool]> 0x1120dd0, 0x1229860, undef:i64
try.c: 0x1229860: i64 = X86ISD::Wrapper TargetConstantPool:i64<i32 1> 0
try.c: 0x11e02e0: i64 = TargetConstantPool<i32 1> 0
try.c: 0x1224fd0: i64 = undef
try.c: 0x1229bf0: v16i32 = BUILD_VECTOR Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>, Constant:i32<0>
try.c: 0x1229ac0: i32 = Constant<0>
try.c: 0x1229ac0: i32 = Constant<0>
try.c: 0x1229ac0: i32 = Constant<0>
try.c: 0x1229ac0: i32 = Constant<0>
try.c: ...

Number of similar (compiler,implementation) pairs: 1, namely:

Compiler	Implementations
clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments	ref