Implementation notes: aarch64, pi4b, crypto_hash/bmw256

Computer: pi4b
Microarchitecture: aarch64; Cortex-A72 (410fd083)
Architecture: aarch64
CPU ID: 410fd083
SUPERCOP version: 20240716
Operation: crypto_hash
Primitive: bmw256
TimeObject sizeTest sizeImplementationCompilerBenchmark dateSUPERCOP version
1155710588 0 022987 872 744T:optbbegcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
115579956 0 021291 856 736T:optbbegcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1155710352 0 022802 880 744T:optc04gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
124466036 0 020097 896 744T:optbgbeclang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1244613920 0 026459 872 744T:sphlibgcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1333511816 0 024355 872 744T:sphlib-smallgcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
142189392 0 023817 896 744T:optabeclang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421810492 0 022891 872 744T:optabegcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421810700 0 024163 872 752T:optabegcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
142189816 0 022114 864 744T:optabegcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
142189844 0 021179 856 736T:optabegcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
142189376 0 023801 896 744T:optbbeclang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421810624 0 024083 872 752T:optbbegcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
142189880 0 022178 864 744T:optbbegcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
142186268 0 018682 880 744T:optbgbegcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
142186208 0 018529 872 744T:optbgbegcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
142185956 0 017330 864 736T:optbgbegcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421815428 0 029529 896 744T:optc02clang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421815496 0 027899 872 744T:optc02gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421815432 0 028899 872 752T:optc02gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421815212 0 027587 872 744T:optc02gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421813356 0 024731 856 736T:optc02gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
142189916 0 024345 896 744T:optc03clang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421810360 0 022794 880 744T:optc03gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
142189964 0 024393 896 744T:optc04clang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421813728 0 028297 896 744T:sphlibclang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421816900 0 030467 872 752T:sphlibgcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421814816 0 027331 872 744T:sphlibgcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421813260 0 024779 856 736T:sphlibgcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421811516 0 026097 896 744T:sphlib-smallclang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421815060 0 028635 872 752T:sphlib-smallgcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421813088 0 025611 872 744T:sphlib-smallgcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
1421811020 0 022547 856 736T:sphlib-smallgcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
275599436 0 023937 896 744T:refclang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
284369104 0 021547 872 744T:refgcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
2843610196 0 023786 880 752T:refgcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
284368916 0 021331 872 744T:refgcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625
284368684 0 020083 856 736T:refgcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall2024062720240625

Checksum failure


d900ae76e9431ed1695891fdf0fbf723719acd8e6963e4441d031f1fa956f502

Number of similar (implementation,compiler) pairs: 1, namely:
ImplementationCompiler
T:optbgbegcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)

Checksum failure


44097438da4f819b238308e26bc250d0833ad8cf531d47cf3d2a73cc6271c268

Number of similar (implementation,compiler) pairs: 1, namely:
ImplementationCompiler
T:optc03gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)

Checksum failure


b3f9911e664a9161675e45de3dcb7ae38235ed84164c62025d531323cf8f48dc

Number of similar (implementation,compiler) pairs: 1, namely:
ImplementationCompiler
T:optc03gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)

Checksum failure


79fe3b764b22321b0d9f1b9f33d6e205b598fc88c5946ece562087d82cc9c57d

Number of similar (implementation,compiler) pairs: 1, namely:
ImplementationCompiler
T:optc04gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)

Checksum failure


970566f053c877ade97546302b48d2417759f496a5a46f65721fdb7ba9aa26c6

Number of similar (implementation,compiler) pairs: 1, namely:
ImplementationCompiler
T:optc04gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)

Test failure


error 111
crypto_hash is nondeterministic

Number of similar (implementation,compiler) pairs: 2, namely:
ImplementationCompiler
T:optc03gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc04gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)

Compiler output


BlueMidnightWish.c: BlueMidnightWish.c:1182:29: warning: unused variable 'tdat32' [-Wunused-variable]
BlueMidnightWish.c:         u_int32_t *data32, *p256, *tdat32, *tp256;
BlueMidnightWish.c:                                    ^
BlueMidnightWish.c: BlueMidnightWish.c:1182:38: warning: unused variable 'tp256' [-Wunused-variable]
BlueMidnightWish.c:         u_int32_t *data32, *p256, *tdat32, *tp256;
BlueMidnightWish.c:                                             ^
BlueMidnightWish.c: BlueMidnightWish.c:1189:33: warning: unused variable 't256_26' [-Wunused-variable]
BlueMidnightWish.c:     u_int32_t t256_24, t256_25, t256_26, t256_27, t256_28, t256_29, t256_30, t256_31;
BlueMidnightWish.c:                                 ^
BlueMidnightWish.c: BlueMidnightWish.c:1189:24: warning: unused variable 't256_25' [-Wunused-variable]
BlueMidnightWish.c:     u_int32_t t256_24, t256_25, t256_26, t256_27, t256_28, t256_29, t256_30, t256_31;
BlueMidnightWish.c:                        ^
BlueMidnightWish.c: BlueMidnightWish.c:1189:15: warning: unused variable 't256_24' [-Wunused-variable]
BlueMidnightWish.c:     u_int32_t t256_24, t256_25, t256_26, t256_27, t256_28, t256_29, t256_30, t256_31;
BlueMidnightWish.c:               ^
BlueMidnightWish.c: BlueMidnightWish.c:1200:69: warning: unused variable 't512_30' [-Wunused-variable]
BlueMidnightWish.c:     u_int64_t t512_24, t512_25, t512_26, t512_27, t512_28, t512_29, t512_30, t512_31;
BlueMidnightWish.c:                                                                     ^
BlueMidnightWish.c: BlueMidnightWish.c:1189:78: warning: unused variable 't256_31' [-Wunused-variable]
BlueMidnightWish.c:     u_int32_t t256_24, t256_25, t256_26, t256_27, t256_28, t256_29, t256_30, t256_31;
BlueMidnightWish.c:                                                                              ^
BlueMidnightWish.c: BlueMidnightWish.c:1200:78: warning: unused variable 't512_31' [-Wunused-variable]
BlueMidnightWish.c:     u_int64_t t512_24, t512_25, t512_26, t512_27, t512_28, t512_29, t512_30, t512_31;
BlueMidnightWish.c:                                                                              ^
BlueMidnightWish.c: BlueMidnightWish.c:1189:69: warning: unused variable 't256_30' [-Wunused-variable]
BlueMidnightWish.c: ...

Number of similar (implementation,compiler) pairs: 1, namely:
ImplementationCompiler
T:optc01clang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Ubuntu_Clang_14.0.0)

Compiler output


BlueMidnightWish.c: BlueMidnightWish.c: In function 'Update':
BlueMidnightWish.c: BlueMidnightWish.c:1200:78: warning: unused variable 't512_31' [-Wunused-variable]
BlueMidnightWish.c:  1200 |     u_int64_t t512_24, t512_25, t512_26, t512_27, t512_28, t512_29, t512_30, t512_31;
BlueMidnightWish.c:       |                                                                              ^~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c:1200:69: warning: unused variable 't512_30' [-Wunused-variable]
BlueMidnightWish.c:  1200 |     u_int64_t t512_24, t512_25, t512_26, t512_27, t512_28, t512_29, t512_30, t512_31;
BlueMidnightWish.c:       |                                                                     ^~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c:1200:60: warning: unused variable 't512_29' [-Wunused-variable]
BlueMidnightWish.c:  1200 |     u_int64_t t512_24, t512_25, t512_26, t512_27, t512_28, t512_29, t512_30, t512_31;
BlueMidnightWish.c:       |                                                            ^~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c:1200:51: warning: unused variable 't512_28' [-Wunused-variable]
BlueMidnightWish.c:  1200 |     u_int64_t t512_24, t512_25, t512_26, t512_27, t512_28, t512_29, t512_30, t512_31;
BlueMidnightWish.c:       |                                                   ^~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c:1200:42: warning: unused variable 't512_27' [-Wunused-variable]
BlueMidnightWish.c:  1200 |     u_int64_t t512_24, t512_25, t512_26, t512_27, t512_28, t512_29, t512_30, t512_31;
BlueMidnightWish.c:       |                                          ^~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c:1200:33: warning: unused variable 't512_26' [-Wunused-variable]
BlueMidnightWish.c:  1200 |     u_int64_t t512_24, t512_25, t512_26, t512_27, t512_28, t512_29, t512_30, t512_31;
BlueMidnightWish.c:       |                                 ^~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c:1200:24: warning: unused variable 't512_25' [-Wunused-variable]
BlueMidnightWish.c:  1200 |     u_int64_t t512_24, t512_25, t512_26, t512_27, t512_28, t512_29, t512_30, t512_31;
BlueMidnightWish.c:       |                        ^~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c:1200:15: warning: unused variable 't512_24' [-Wunused-variable]
BlueMidnightWish.c:  1200 |     u_int64_t t512_24, t512_25, t512_26, t512_27, t512_28, t512_29, t512_30, t512_31;
BlueMidnightWish.c:       |               ^~~~~~~
BlueMidnightWish.c: ...

Number of similar (implementation,compiler) pairs: 4, namely:
ImplementationCompiler
T:optc01gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc01gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc01gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc01gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)

Compiler output


BlueMidnightWish.c: BlueMidnightWish.c:878:84: warning: '&' within '^' [-Wbitwise-op-parentheses]
BlueMidnightWish.c:         hashState256(state)->LastPart[LastByte] = hashState256(state)->LastPart[LastByte] & (0xff << (PadOnePosition + 1) )\
BlueMidnightWish.c:                                                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c:878:84: note: place parentheses around the '&' expression to silence this warning
BlueMidnightWish.c:         hashState256(state)->LastPart[LastByte] = hashState256(state)->LastPart[LastByte] & (0xff << (PadOnePosition + 1) )\
BlueMidnightWish.c:                                                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
BlueMidnightWish.c: 1 warning generated.

Number of similar (implementation,compiler) pairs: 1, namely:
ImplementationCompiler
T:optc02clang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Ubuntu_Clang_14.0.0)

Compiler output


BlueMidnightWish.c: BlueMidnightWish.c: In function 'Final':
BlueMidnightWish.c: BlueMidnightWish.c:878:91: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
BlueMidnightWish.c:   878 |         hashState256(state)->LastPart[LastByte] = hashState256(state)->LastPart[LastByte] & (0xff << (PadOnePosition + 1) )\
BlueMidnightWish.c:       |                                                                                           ^

Number of similar (implementation,compiler) pairs: 4, namely:
ImplementationCompiler
T:optc02gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc02gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc02gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc02gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)

Compiler output


BlueMidnightWish.c: BlueMidnightWish.c:108:12: warning: unused variable 'rotate_t1' [-Wunused-variable]
BlueMidnightWish.c:         u_int32_t rotate_t1;
BlueMidnightWish.c:                   ^
BlueMidnightWish.c: BlueMidnightWish.c:429:12: warning: unused variable 'rotate_t1' [-Wunused-variable]
BlueMidnightWish.c:         u_int32_t rotate_t1;
BlueMidnightWish.c:                   ^
BlueMidnightWish.c: BlueMidnightWish.c:735:84: warning: '&' within '^' [-Wbitwise-op-parentheses]
BlueMidnightWish.c:         hashState256_(state).LastPart[LastByte] = hashState256_(state).LastPart[LastByte] & (0xff << (PadOnePosition + 1) )\
BlueMidnightWish.c:                                                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c:735:84: note: place parentheses around the '&' expression to silence this warning
BlueMidnightWish.c:         hashState256_(state).LastPart[LastByte] = hashState256_(state).LastPart[LastByte] & (0xff << (PadOnePosition + 1) )\
BlueMidnightWish.c:                                                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
BlueMidnightWish.c: 3 warnings generated.

Number of similar (implementation,compiler) pairs: 1, namely:
ImplementationCompiler
T:optc03clang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Ubuntu_Clang_14.0.0)

Compiler output


BlueMidnightWish.c: BlueMidnightWish.c: In function 'Compress256':
BlueMidnightWish.c: BlueMidnightWish.c:108:19: warning: unused variable 'rotate_t1' [-Wunused-variable]
BlueMidnightWish.c:   108 |         u_int32_t rotate_t1;
BlueMidnightWish.c:       |                   ^~~~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c: In function 'FinalCompress256':
BlueMidnightWish.c: BlueMidnightWish.c:429:19: warning: unused variable 'rotate_t1' [-Wunused-variable]
BlueMidnightWish.c:   429 |         u_int32_t rotate_t1;
BlueMidnightWish.c:       |                   ^~~~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c: In function 'Hash':
BlueMidnightWish.c: BlueMidnightWish.c:735:91: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
BlueMidnightWish.c:   735 |         hashState256_(state).LastPart[LastByte] = hashState256_(state).LastPart[LastByte] & (0xff << (PadOnePosition + 1) )\
BlueMidnightWish.c:       |                                                                                           ^

Number of similar (implementation,compiler) pairs: 4, namely:
ImplementationCompiler
T:optc03gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc03gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc03gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc03gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)

Compiler output


BlueMidnightWish.c: BlueMidnightWish.c:559:12: warning: unused variable 'rotate_t1' [-Wunused-variable]
BlueMidnightWish.c:         u_int32_t rotate_t1;
BlueMidnightWish.c:                   ^
BlueMidnightWish.c: BlueMidnightWish.c:865:84: warning: '&' within '^' [-Wbitwise-op-parentheses]
BlueMidnightWish.c:         hashState256_(state).LastPart[LastByte] = hashState256_(state).LastPart[LastByte] & (0xff << (PadOnePosition + 1) )\
BlueMidnightWish.c:                                                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c:865:84: note: place parentheses around the '&' expression to silence this warning
BlueMidnightWish.c:         hashState256_(state).LastPart[LastByte] = hashState256_(state).LastPart[LastByte] & (0xff << (PadOnePosition + 1) )\
BlueMidnightWish.c:                                                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
BlueMidnightWish.c: 2 warnings generated.

Number of similar (implementation,compiler) pairs: 1, namely:
ImplementationCompiler
T:optc04clang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Ubuntu_Clang_14.0.0)

Compiler output


BlueMidnightWish.c: BlueMidnightWish.c: In function 'FinalCompress256':
BlueMidnightWish.c: BlueMidnightWish.c:559:19: warning: unused variable 'rotate_t1' [-Wunused-variable]
BlueMidnightWish.c:   559 |         u_int32_t rotate_t1;
BlueMidnightWish.c:       |                   ^~~~~~~~~
BlueMidnightWish.c: BlueMidnightWish.c: In function 'Hash':
BlueMidnightWish.c: BlueMidnightWish.c:865:91: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
BlueMidnightWish.c:   865 |         hashState256_(state).LastPart[LastByte] = hashState256_(state).LastPart[LastByte] & (0xff << (PadOnePosition + 1) )\
BlueMidnightWish.c:       |                                                                                           ^

Number of similar (implementation,compiler) pairs: 4, namely:
ImplementationCompiler
T:optc04gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc04gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc04gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)
T:optc04gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (11.4.0)