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9c79e646c6
postgresql/src/backend
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Tom Lane 9c79e646c6 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
2020-09-07 12:03:04 -04:00
..
access Yet more elimination of dead stores and useless initializations. 2020-09-05 13:17:32 -04:00
bootstrap Improve some ancient, crufty code in bootstrap + initdb. 2020-09-05 16:20:04 -04:00
catalog Fix misleading error message about inconsistent moving-aggregate types. 2020-09-06 12:55:13 -04:00
commands Yet more elimination of dead stores and useless initializations. 2020-09-05 13:17:32 -04:00
executor Be more careful about the shape of hashable subplan clauses. 2020-08-14 22:14:03 -04:00
foreign Update copyrights for 2020 2020-01-01 12:21:45 -05:00
jit Fix a few typos in JIT comments and README 2020-08-21 09:33:56 +12:00
lib Use pg_bitutils for HyperLogLog. 2020-07-30 09:14:23 -07:00
libpq Refactor pg_get_line() to expose an alternative StringInfo-based API. 2020-09-06 14:13:19 -04:00
main Clean up includes of s_lock.h. 2020-06-18 19:41:05 -07:00
nodes Remove variable "concurrent" from ReindexStmt 2020-09-04 10:43:32 +09:00
optimizer Remove some more useless assignments. 2020-09-04 14:32:19 -04:00
parser Remove some more useless assignments. 2020-09-04 14:32:19 -04:00
partitioning Remove some more useless assignments. 2020-09-04 14:32:19 -04:00
po Translation updates 2020-05-18 12:49:30 +02:00
port Add huge_page_size setting for use on Linux. 2020-07-17 14:33:00 +12:00
postmaster Avoid lockup of a parallel worker when reporting a long error message. 2020-09-03 16:52:09 -04:00
regex Dial back -Wimplicit-fallthrough to level 3 2020-05-13 15:31:14 -04:00
replication Fix over-eager ping'ing in logical replication receiver. 2020-09-04 20:33:36 -04:00
rewrite Redefine pg_class.reltuples to be -1 before the first VACUUM or ANALYZE. 2020-08-30 12:21:51 -04:00
snowball code: replace most remaining uses of 'master'. 2020-07-08 13:24:35 -07:00
statistics Remove some more useless assignments. 2020-09-04 14:32:19 -04:00
storage Skip unnecessary stat() calls in walkdir(). 2020-09-07 18:28:06 +12:00
tcop Remove variable "concurrent" from ReindexStmt 2020-09-04 10:43:32 +09:00
tsearch Yet more elimination of dead stores and useless initializations. 2020-09-05 13:17:32 -04:00
utils Frob numeric.c loop so that clang will auto-vectorize it too. 2020-09-07 12:03:04 -04:00
.gitignore Add .gitignore entries for AIX-specific intermediate build artifacts. 2015-07-08 20:44:22 -04:00
common.mk Remove PARTIAL_LINKING build mode. 2018-03-30 17:33:04 -07:00
Makefile Update copyrights for 2020 2020-01-01 12:21:45 -05:00
nls.mk Add missing gettext triggers 2020-04-28 13:35:40 +02:00