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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2020-09-07 12:03:04 -0400 |
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| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2020-09-07 12:03:04 -0400 |
| commit | 9c79e646c6f0f8df06d966c536d0c6aa33bf1b06 (patch) | |
| tree | 96209824ad6be794e08afcf840c613a101d92000 /src/backend/utils/adt/network_spgist.c | |
| parent | 87e6ed7c8c6abb6dd62119259d2fd89169a04ac0 (diff) | |
| download | postgresql-9c79e646c6f0f8df06d966c536d0c6aa33bf1b06.tar.gz postgresql-9c79e646c6f0f8df06d966c536d0c6aa33bf1b06.zip | |
Frob numeric.c loop so that clang will auto-vectorize it too.
Experimentation shows that clang will auto-vectorize the critical
multiplication loop if the termination condition is written "i2 < limit"
rather than "i2 <= limit". This seems unbelievably stupid, but I've
reproduced it on both clang 9.0.1 (RHEL8) and 11.0.3 (macOS Catalina).
gcc doesn't care, so tweak the code to do it that way.
Discussion: https://postgr.es/m/CAJ3gD9evtA_vBo+WMYMyT-u=keHX7-r8p2w7OSRfXf42LTwCZQ@mail.gmail.com
Diffstat (limited to 'src/backend/utils/adt/network_spgist.c')
0 files changed, 0 insertions, 0 deletions