Implementation notes: amd64, hydra2, crypto_stream/cryptmtv3

Computer: hydra2
Architecture: amd64
CPU ID: GenuineIntel-000206c2-bfebfbff
SUPERCOP version: 20141014
Operation: crypto_stream
Primitive: cryptmtv3

Time	Implementation	Compiler	Benchmark date	SUPERCOP version
6068	`e/v3`	`clang -O3 -fomit-frame-pointer`	20140712	20140622
6960	`e/v3`	`clang -O3 -fwrapv -mavx2 -fpolly -funroll-loops -fvectorize -fslp-vectorize -fslp-vectorize-aggressive -fomit-frame-pointer`	20140712	20140622
6984	`e/v3`	`clang -O3 -fwrapv -march=x86-64 -mcpu=core-avx2 -mavx2 -maes -mpclmul -fomit-frame-pointer`	20141014	20141014
6984	`e/v3`	`clang -O3 -fwrapv -march=x86-64 -mcpu=core-avx2 -mavx2 -maes -mpclmul -fpolly -funroll-loops -fvectorize -fslp-vectorize -fslp-vectorize-aggressive -fomit-frame-pointer`	20141014	20141014
6984	`e/v3`	`clang -O3 -fwrapv -mavx2 -fomit-frame-pointer`	20140712	20140622
6988	`e/v3`	`gcc -funroll-loops -march=barcelona -O3 -fomit-frame-pointer`	20140529	20140525
6996	`e/v3`	`clang -O3 -fwrapv -march=native -fpolly -funroll-loops -fvectorize -fslp-vectorize -fslp-vectorize-aggressive -fomit-frame-pointer`	20140712	20140622
6996	`e/v3`	`gcc -funroll-loops -m64 -march=barcelona -O2 -fomit-frame-pointer`	20140529	20140525
7000	`e/v3`	`clang -O3 -fwrapv -march=native -fomit-frame-pointer`	20140712	20140622
7012	`e/v3`	`gcc -m64 -O -fomit-frame-pointer`	20140529	20140525
7016	`e/v3`	`gcc -m64 -march=core2 -O -fomit-frame-pointer`	20140529	20140525
7020	`e/v3`	`gcc -funroll-loops -march=barcelona -O2 -fomit-frame-pointer`	20140529	20140525
7032	`e/v3`	`gcc -funroll-loops -O -fomit-frame-pointer`	20140529	20140525
7032	`e/v3`	`gcc -funroll-loops -fno-schedule-insns -O -fomit-frame-pointer`	20140529	20140525
7032	`e/v3`	`gcc -funroll-loops -m64 -march=barcelona -O3 -fomit-frame-pointer`	20140529	20140525
7040	`e/v3`	`gcc -funroll-loops -march=k8 -O -fomit-frame-pointer`	20140529	20140525
7048	`e/v3`	`gcc -funroll-loops -march=barcelona -O -fomit-frame-pointer`	20140529	20140525
7060	`e/v3`	`gcc -m64 -march=corei7 -O -fomit-frame-pointer`	20140529	20140525
7064	`e/v3`	`gcc -O -fomit-frame-pointer`	20140529	20140525
7064	`e/v3`	`gcc -m64 -march=core2 -msse4.1 -O -fomit-frame-pointer`	20140529	20140525
7064	`e/v3`	`gcc -m64 -march=core2 -msse4 -O -fomit-frame-pointer`	20140529	20140525
7064	`e/v3`	`gcc -m64 -march=native -mtune=native -O -fomit-frame-pointer`	20140529	20140525
7068	`e/v3`	`gcc -march=nocona -O -fomit-frame-pointer`	20140529	20140525
7072	`e/v3`	`gcc -funroll-loops -m64 -O -fomit-frame-pointer`	20140529	20140525
7080	`e/v3`	`gcc -fno-schedule-insns -O -fomit-frame-pointer`	20140529	20140525
7080	`e/v3`	`gcc -m64 -march=core2 -msse4 -O2 -fomit-frame-pointer`	20140529	20140525
7092	`e/v3`	`gcc -funroll-loops -m64 -march=barcelona -O -fomit-frame-pointer`	20140529	20140525
7096	`e/v3`	`gcc -m64 -march=barcelona -O -fomit-frame-pointer`	20140529	20140525
7100	`e/v3`	`gcc -funroll-loops -m64 -march=k8 -O -fomit-frame-pointer`	20140529	20140525
7100	`e/v3`	`gcc -march=barcelona -O3 -fomit-frame-pointer`	20140529	20140525
7108	`e/v3`	`gcc -m64 -march=corei7 -O2 -fomit-frame-pointer`	20140529	20140525
7116	`e/v3`	`gcc -m64 -march=core2 -O2 -fomit-frame-pointer`	20140529	20140525
7120	`e/v3`	`gcc -funroll-loops -march=nocona -O -fomit-frame-pointer`	20140529	20140525
7124	`e/v3`	`gcc -m64 -march=barcelona -O3 -fomit-frame-pointer`	20140529	20140525
7124	`e/v3`	`gcc -march=barcelona -O2 -fomit-frame-pointer`	20140529	20140525
7128	`e/v3`	`gcc -march=barcelona -O -fomit-frame-pointer`	20140529	20140525
7132	`e/v3`	`gcc -m64 -march=core2 -msse4.1 -O3 -fomit-frame-pointer`	20140529	20140525
7140	`e/v3`	`gcc -funroll-loops -m64 -march=nocona -O -fomit-frame-pointer`	20140529	20140525
7144	`e/v3`	`gcc -m64 -march=barcelona -O2 -fomit-frame-pointer`	20140529	20140525
7148	`e/v3`	`gcc -m64 -march=core2 -msse4 -O3 -fomit-frame-pointer`	20140529	20140525
7148	`e/v3`	`gcc -m64 -march=corei7 -O3 -fomit-frame-pointer`	20140529	20140525
7148	`e/v3`	`gcc -m64 -march=native -mtune=native -O3 -fomit-frame-pointer`	20140529	20140525
7168	`e/v3`	`gcc -m64 -march=core2 -msse4.1 -O2 -fomit-frame-pointer`	20140529	20140525
7172	`e/v3`	`gcc -march=k8 -O -fomit-frame-pointer`	20140529	20140525
7176	`e/v3`	`gcc -funroll-loops -march=nocona -O3 -fomit-frame-pointer`	20140529	20140525
7180	`e/v3`	`gcc -O2 -fomit-frame-pointer`	20140529	20140525
7188	`e/v3`	`gcc -funroll-loops -m64 -march=nocona -O3 -fomit-frame-pointer`	20140529	20140525
7192	`e/v3`	`gcc -m64 -march=k8 -O2 -fomit-frame-pointer`	20140529	20140525
7192	`e/v3`	`gcc -m64 -march=k8 -O -fomit-frame-pointer`	20140529	20140525
7200	`e/v3`	`gcc -funroll-loops -march=nocona -O2 -fomit-frame-pointer`	20140529	20140525
7204	`e/v3`	`gcc -m64 -march=native -mtune=native -O2 -fomit-frame-pointer`	20140529	20140525
7208	`e/v3`	`gcc -m64 -march=nocona -O -fomit-frame-pointer`	20140529	20140525
7216	`e/v3`	`gcc -fno-schedule-insns -O3 -fomit-frame-pointer`	20140529	20140525
7220	`e/v3`	`gcc -funroll-loops -m64 -march=nocona -O2 -fomit-frame-pointer`	20140529	20140525
7228	`e/v3`	`gcc -O3 -fomit-frame-pointer`	20140529	20140525
7228	`e/v3`	`gcc -fno-schedule-insns -O2 -fomit-frame-pointer`	20140529	20140525
7228	`e/v3`	`gcc -march=k8 -O2 -fomit-frame-pointer`	20140529	20140525
7248	`e/v3`	`gcc -m64 -march=core2 -O3 -fomit-frame-pointer`	20140529	20140525
7256	`e/v3`	`gcc -march=k8 -O3 -fomit-frame-pointer`	20140529	20140525
7264	`e/v3`	`gcc -m64 -O3 -fomit-frame-pointer`	20140529	20140525
7264	`e/v3`	`gcc -m64 -march=k8 -O3 -fomit-frame-pointer`	20140529	20140525
7284	`e/v3`	`gcc -march=nocona -O3 -fomit-frame-pointer`	20140529	20140525
7312	`e/v3`	`gcc -m64 -march=nocona -O2 -fomit-frame-pointer`	20140529	20140525
7320	`e/v3`	`gcc -funroll-loops -m64 -march=k8 -O3 -fomit-frame-pointer`	20140529	20140525
7328	`e/v3`	`gcc -m64 -O2 -fomit-frame-pointer`	20140529	20140525
7340	`e/v3`	`gcc -march=nocona -O2 -fomit-frame-pointer`	20140529	20140525
7360	`e/v3`	`gcc -m64 -march=nocona -O3 -fomit-frame-pointer`	20140529	20140525
7376	`e/v3`	`gcc -funroll-loops -fno-schedule-insns -O3 -fomit-frame-pointer`	20140529	20140525
7392	`e/v3`	`gcc -funroll-loops -march=k8 -O3 -fomit-frame-pointer`	20140529	20140525
7400	`e/v3`	`gcc -funroll-loops -O2 -fomit-frame-pointer`	20140529	20140525
7408	`e/v3`	`gcc -funroll-loops -m64 -O3 -fomit-frame-pointer`	20140529	20140525
7412	`e/v3`	`gcc -funroll-loops -O3 -fomit-frame-pointer`	20140529	20140525
7420	`e/v3`	`gcc -funroll-loops -march=k8 -O2 -fomit-frame-pointer`	20140529	20140525
7456	`e/v3`	`gcc -funroll-loops -m64 -march=k8 -O2 -fomit-frame-pointer`	20140529	20140525
7504	`e/v3`	`gcc -funroll-loops -fno-schedule-insns -O2 -fomit-frame-pointer`	20140529	20140525
7504	`e/v3`	`gcc -funroll-loops -m64 -O2 -fomit-frame-pointer`	20140529	20140525
8224	`e/v3`	`gcc -funroll-loops -march=nocona -Os -fomit-frame-pointer`	20140529	20140525
8260	`e/v3`	`gcc -funroll-loops -m64 -march=nocona -Os -fomit-frame-pointer`	20140529	20140525
8316	`e/v3`	`gcc -funroll-loops -m64 -march=barcelona -Os -fomit-frame-pointer`	20140529	20140525
8320	`e/v3`	`gcc -funroll-loops -march=barcelona -Os -fomit-frame-pointer`	20140529	20140525
8380	`e/v3`	`gcc -funroll-loops -fno-schedule-insns -Os -fomit-frame-pointer`	20140529	20140525
8400	`e/v3`	`gcc -funroll-loops -Os -fomit-frame-pointer`	20140529	20140525
8412	`e/v3`	`gcc -funroll-loops -m64 -march=k8 -Os -fomit-frame-pointer`	20140529	20140525
8420	`e/v3`	`gcc -funroll-loops -m64 -Os -fomit-frame-pointer`	20140529	20140525
8444	`e/v3`	`gcc -funroll-loops -march=k8 -Os -fomit-frame-pointer`	20140529	20140525
8472	`e/v3`	`gcc -m64 -march=core2 -Os -fomit-frame-pointer`	20140529	20140525
8472	`e/v3`	`gcc -m64 -march=core2 -msse4.1 -Os -fomit-frame-pointer`	20140529	20140525
8472	`e/v3`	`gcc -m64 -march=core2 -msse4 -Os -fomit-frame-pointer`	20140529	20140525
8472	`e/v3`	`gcc -m64 -march=corei7 -Os -fomit-frame-pointer`	20140529	20140525
8472	`e/v3`	`gcc -m64 -march=native -mtune=native -Os -fomit-frame-pointer`	20140529	20140525
8480	`e/v3`	`gcc -m64 -march=barcelona -Os -fomit-frame-pointer`	20140529	20140525
8492	`e/v3`	`gcc -march=barcelona -Os -fomit-frame-pointer`	20140529	20140525
8580	`e/v3`	`gcc -march=nocona -Os -fomit-frame-pointer`	20140529	20140525
8588	`e/v3`	`gcc -m64 -march=nocona -Os -fomit-frame-pointer`	20140529	20140525
8628	`e/v3`	`gcc -fno-schedule-insns -Os -fomit-frame-pointer`	20140529	20140525
8628	`e/v3`	`gcc -march=k8 -Os -fomit-frame-pointer`	20140529	20140525
8648	`e/v3`	`gcc -m64 -Os -fomit-frame-pointer`	20140529	20140525
8652	`e/v3`	`gcc -m64 -march=k8 -Os -fomit-frame-pointer`	20140529	20140525
8664	`e/v3`	`gcc -Os -fomit-frame-pointer`	20140529	20140525
47820	`e/v3`	`gcc -funroll-loops`	20140529	20140525
48064	`e/v3`	`cc`	20140529	20140525
48084	`e/v3`	`gcc`	20140529	20140525

Compiler output

Implementation: crypto_stream/cryptmtv3/e/v3
Compiler: clang -O3 -fomit-frame-pointer

cryptmt-v3.c: In file included from cryptmt-v3.c:1:
cryptmt-v3.c: ./e/cryptmt-v3.c:189:18: warning: array index of '156' indexes past the end of an array (that contains 156 elements) [-Warray-bounds]
cryptmt-v3.c: do_recursion(ps->gt;sfmt[N], ps->gt;sfmt[POS1], ps->gt;sfmt[N - 1]);
cryptmt-v3.c: ^ ~
cryptmt-v3.c: ./e/cryptmt-v3.c:25:5: note: array 'sfmt' declared here
cryptmt-v3.c: u32 sfmt[N][4];
cryptmt-v3.c: ^
cryptmt-v3.c: ./e/cryptmt-v3.c:403:27: warning: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess]
cryptmt-v3.c: memset(ctx, 0, sizeof(ctx));
cryptmt-v3.c: ~~~ ^~~
cryptmt-v3.c: 2 warnings generated.
try.c: try-anything.c:110:19: warning: if statement has empty body [-Wempty-body]
try.c: ;
try.c: ^
try.c: 1 warning generated.
try.c: try-anything.c:110:19: warning: if statement has empty body [-Wempty-body]
try.c: ;
try.c: ^
try.c: 1 warning generated.

Number of similar (compiler,implementation) pairs: 2, namely:

Compiler	Implementations
clang -O3 -fomit-frame-pointer	e/v3
clang -O3 -fwrapv -march=native -fomit-frame-pointer	e/v3

Compiler output

Implementation: crypto_stream/cryptmtv3/e/v3
Compiler: clang -O3 -fwrapv -march=native -fpolly -funroll-loops -fvectorize -fslp-vectorize -fslp-vectorize-aggressive -fomit-frame-pointer

api.c: clang: warning: argument unused during compilation: '-fpolly'
api.c: clang: warning: argument unused during compilation: '-fvectorize'
api.c: clang: warning: argument unused during compilation: '-fslp-vectorize'
api.c: clang: warning: argument unused during compilation: '-fslp-vectorize-aggressive'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-fpolly'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-fvectorize'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-fslp-vectorize'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-fslp-vectorize-aggressive'
cryptmt-v3.c: In file included from cryptmt-v3.c:1:
cryptmt-v3.c: ./e/cryptmt-v3.c:189:18: warning: array index of '156' indexes past the end of an array (that contains 156 elements) [-Warray-bounds]
cryptmt-v3.c: do_recursion(ps->gt;sfmt[N], ps->gt;sfmt[POS1], ps->gt;sfmt[N - 1]);
cryptmt-v3.c: ^ ~
cryptmt-v3.c: ./e/cryptmt-v3.c:25:5: note: array 'sfmt' declared here
cryptmt-v3.c: u32 sfmt[N][4];
cryptmt-v3.c: ^
cryptmt-v3.c: ./e/cryptmt-v3.c:403:27: warning: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess]
cryptmt-v3.c: memset(ctx, 0, sizeof(ctx));
cryptmt-v3.c: ~~~ ^~~
cryptmt-v3.c: 2 warnings generated.
try.c: try-anything.c:110:19: warning: if statement has empty body [-Wempty-body]
try.c: ;
try.c: ^
try.c: 1 warning generated.
try.c: try-anything.c:110:19: warning: if statement has empty body [-Wempty-body]
try.c: ;
try.c: ^
try.c: 1 warning generated.

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

Compiler	Implementations
clang -O3 -fwrapv -march=native -fpolly -funroll-loops -fvectorize -fslp-vectorize -fslp-vectorize-aggressive -fomit-frame-pointer	e/v3

Compiler output

Implementation: crypto_stream/cryptmtv3/e/v3
Compiler: clang -O3 -fwrapv -march=x86-64 -mcpu=core-avx2 -mavx2 -maes -mpclmul -fomit-frame-pointer

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

Compiler	Implementations
clang -O3 -fwrapv -march=x86-64 -mcpu=core-avx2 -mavx2 -maes -mpclmul -fomit-frame-pointer	e/v3

Compiler output

Implementation: crypto_stream/cryptmtv3/e/v3
Compiler: clang -O3 -fwrapv -march=x86-64 -mcpu=core-avx2 -mavx2 -maes -mpclmul -fpolly -funroll-loops -fvectorize -fslp-vectorize -fslp-vectorize-aggressive -fomit-frame-pointer

api.c: clang: warning: argument unused during compilation: '-mcpu=core-avx2'
api.c: clang: warning: argument unused during compilation: '-mavx2'
api.c: clang: warning: argument unused during compilation: '-mpclmul'
api.c: clang: warning: argument unused during compilation: '-fpolly'
api.c: clang: warning: argument unused during compilation: '-fvectorize'
api.c: clang: warning: argument unused during compilation: '-fslp-vectorize'
api.c: clang: warning: argument unused during compilation: '-fslp-vectorize-aggressive'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-mcpu=core-avx2'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-mavx2'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-mpclmul'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-fpolly'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-fvectorize'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-fslp-vectorize'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-fslp-vectorize-aggressive'
cryptmt-v3.c: In file included from cryptmt-v3.c:1:
cryptmt-v3.c: ./e/cryptmt-v3.c:189:18: warning: array index of '156' indexes past the end of an array (that contains 156 elements) [-Warray-bounds]
cryptmt-v3.c: do_recursion(ps->gt;sfmt[N], ps->gt;sfmt[POS1], ps->gt;sfmt[N - 1]);
cryptmt-v3.c: ^ ~
cryptmt-v3.c: ./e/cryptmt-v3.c:25:5: note: array 'sfmt' declared here
cryptmt-v3.c: u32 sfmt[N][4];
cryptmt-v3.c: ^
cryptmt-v3.c: ./e/cryptmt-v3.c:403:27: warning: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess]
cryptmt-v3.c: memset(ctx, 0, sizeof(ctx));
cryptmt-v3.c: ~~~ ^~~
cryptmt-v3.c: 2 warnings generated.
try.c: try-anything.c:110:19: warning: if statement has empty body [-Wempty-body]
try.c: ;
try.c: ^
try.c: 1 warning generated.
try.c: try-anything.c:110:19: warning: if statement has empty body [-Wempty-body]
try.c: ;
try.c: ^
try.c: 1 warning generated.

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

Compiler	Implementations
clang -O3 -fwrapv -march=x86-64 -mcpu=core-avx2 -mavx2 -maes -mpclmul -fpolly -funroll-loops -fvectorize -fslp-vectorize -fslp-vectorize-aggressive -fomit-frame-pointer	e/v3

Compiler output

Implementation: crypto_stream/cryptmtv3/e/v3
Compiler: clang -O3 -fwrapv -mavx2 -fomit-frame-pointer

api.c: clang: warning: argument unused during compilation: '-mavx2'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-mavx2'
cryptmt-v3.c: In file included from cryptmt-v3.c:1:
cryptmt-v3.c: ./e/cryptmt-v3.c:189:18: warning: array index of '156' indexes past the end of an array (that contains 156 elements) [-Warray-bounds]
cryptmt-v3.c: do_recursion(ps->gt;sfmt[N], ps->gt;sfmt[POS1], ps->gt;sfmt[N - 1]);
cryptmt-v3.c: ^ ~
cryptmt-v3.c: ./e/cryptmt-v3.c:25:5: note: array 'sfmt' declared here
cryptmt-v3.c: u32 sfmt[N][4];
cryptmt-v3.c: ^
cryptmt-v3.c: ./e/cryptmt-v3.c:403:27: warning: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess]
cryptmt-v3.c: memset(ctx, 0, sizeof(ctx));
cryptmt-v3.c: ~~~ ^~~
cryptmt-v3.c: 2 warnings generated.
try.c: try-anything.c:110:19: warning: if statement has empty body [-Wempty-body]
try.c: ;
try.c: ^
try.c: 1 warning generated.
try.c: try-anything.c:110:19: warning: if statement has empty body [-Wempty-body]
try.c: ;
try.c: ^
try.c: 1 warning generated.

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

Compiler	Implementations
clang -O3 -fwrapv -mavx2 -fomit-frame-pointer	e/v3

Compiler output

Implementation: crypto_stream/cryptmtv3/e/v3
Compiler: clang -O3 -fwrapv -mavx2 -fpolly -funroll-loops -fvectorize -fslp-vectorize -fslp-vectorize-aggressive -fomit-frame-pointer

api.c: clang: warning: argument unused during compilation: '-mavx2'
api.c: clang: warning: argument unused during compilation: '-fpolly'
api.c: clang: warning: argument unused during compilation: '-fvectorize'
api.c: clang: warning: argument unused during compilation: '-fslp-vectorize'
api.c: clang: warning: argument unused during compilation: '-fslp-vectorize-aggressive'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-mavx2'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-fpolly'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-fvectorize'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-fslp-vectorize'
cryptmt-v3.c: clang: warning: argument unused during compilation: '-fslp-vectorize-aggressive'
cryptmt-v3.c: In file included from cryptmt-v3.c:1:
cryptmt-v3.c: ./e/cryptmt-v3.c:189:18: warning: array index of '156' indexes past the end of an array (that contains 156 elements) [-Warray-bounds]
cryptmt-v3.c: do_recursion(ps->gt;sfmt[N], ps->gt;sfmt[POS1], ps->gt;sfmt[N - 1]);
cryptmt-v3.c: ^ ~
cryptmt-v3.c: ./e/cryptmt-v3.c:25:5: note: array 'sfmt' declared here
cryptmt-v3.c: u32 sfmt[N][4];
cryptmt-v3.c: ^
cryptmt-v3.c: ./e/cryptmt-v3.c:403:27: warning: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess]
cryptmt-v3.c: memset(ctx, 0, sizeof(ctx));
cryptmt-v3.c: ~~~ ^~~
cryptmt-v3.c: 2 warnings generated.
try.c: try-anything.c:110:19: warning: if statement has empty body [-Wempty-body]
try.c: ;
try.c: ^
try.c: 1 warning generated.
try.c: try-anything.c:110:19: warning: if statement has empty body [-Wempty-body]
try.c: ;
try.c: ^
try.c: 1 warning generated.

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

Compiler	Implementations
clang -O3 -fwrapv -mavx2 -fpolly -funroll-loops -fvectorize -fslp-vectorize -fslp-vectorize-aggressive -fomit-frame-pointer	e/v3