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Martin Möhrmann b40db51438 cmd/compile: split slow 3 operand LEA instructions into two LEAs 
go tool objdump ../bin/go | grep "\.go\:" | grep -c "LEA.*0x.*[(].*[(].*"
Before: 1012
After: 20

Updates #21735

Benchmarks thanks to drchase@google.com
Intel(R) Xeon(R) CPU E5-1650 v3 @ 3.50GHz
benchstat -geomean *.stdout | grep -v pkg:
name                                       old time/op    new time/op    delta
FastTest2KB-12                              131.0ns ± 0%   131.0ns ± 0%    ~     (all equal)
BaseTest2KB-12                              601.3ns ± 0%   601.3ns ± 0%    ~     (p=0.942 n=45+41)
Encoding4KBVerySparse-12                    15.38µs ± 1%   15.41µs ± 0%  +0.24%  (p=0.000 n=44+43)
Join_8-12                                    2.117s ± 2%    2.128s ± 2%  +0.51%  (p=0.007 n=48+48)
HashimotoLight-12                           1.663ms ± 1%   1.668ms ± 1%  +0.35%  (p=0.006 n=49+49)
Sha3_224_MTU-12                             4.843µs ± 0%   4.836µs ± 0%  -0.14%  (p=0.000 n=45+42)
GenSharedKeyP256-12                         73.74µs ± 0%   70.92µs ± 0%  -3.82%  (p=0.000 n=48+47)
Run/10k/1-12                                 24.81s ± 0%    24.88s ± 0%  +0.30%  (p=0.000 n=48+47)
Run/10k/16-12                                4.621s ± 2%    4.625s ± 3%    ~     (p=0.776 n=50+50)
Dnrm2MediumPosInc-12                        4.018µs ± 0%   4.019µs ± 0%    ~     (p=0.060 n=50+48)
DasumMediumUnitaryInc-12                    855.3ns ± 0%   855.0ns ± 0%  -0.03%  (p=0.000 n=47+42)
Dgeev/Circulant10-12                        40.45µs ± 1%   41.11µs ± 1%  +1.62%  (p=0.000 n=45+49)
Dgeev/Circulant100-12                       10.42ms ± 2%   10.61ms ± 1%  +1.83%  (p=0.000 n=49+48)
MulWorkspaceDense1000Hundredth-12           64.69ms ± 1%   64.63ms ± 1%    ~     (p=0.718 n=48+48)
ScaleVec10000Inc20-12                       22.31µs ± 1%   22.29µs ± 1%    ~     (p=0.424 n=50+50)
ValidateVersionTildeFail-12                 737.6ns ± 1%   736.0ns ± 1%  -0.22%  (p=0.000 n=49+49)
StripHTML-12                                2.846µs ± 0%   2.806µs ± 1%  -1.40%  (p=0.000 n=43+50)
ReaderContains-12                           6.073µs ± 0%   5.999µs ± 0%  -1.22%  (p=0.000 n=48+48)
EncodeCodecFromInternalProtobuf-12          5.817µs ± 2%   5.555µs ± 2%  -4.51%  (p=0.000 n=47+47)
TarjanSCCGnp_10_tenth-12                    7.091µs ± 5%   7.132µs ± 7%    ~     (p=0.361 n=50+50)
TarjanSCCGnp_1000_half-12                   82.25ms ± 3%   81.29ms ± 2%  -1.16%  (p=0.000 n=50+43)
AStarUndirectedmallWorld_10_2_2_2_Heur-12   15.18µs ± 8%   15.11µs ± 7%    ~     (p=0.511 n=50+49)
LouvainDirectedMultiplex-12                 20.92ms ± 1%   21.00ms ± 1%  +0.36%  (p=0.000 n=48+49)
WalkAllBreadthFirstGnp_10_tenth-12          2.974µs ± 4%   2.964µs ± 5%    ~     (p=0.504 n=50+50)
WalkAllBreadthFirstGnp_1000_tenth-12        9.733ms ± 4%   9.741ms ± 4%    ~     (p=0.774 n=48+50)
TextMovementBetweenSegments-12              432.8µs ± 0%   433.2µs ± 1%    ~     (p=0.128 n=50+50)
Growth_MultiSegment-12                      13.11ms ± 0%   13.19ms ± 1%  +0.58%  (p=0.000 n=44+46)
AddingFields/Zap.Sugar-12                   1.296µs ± 1%   1.310µs ± 2%  +1.09%  (p=0.000 n=43+43)
AddingFields/apex/log-12                    34.19µs ± 1%   34.31µs ± 1%  +0.35%  (p=0.000 n=45+45)
AddingFields/inconshreveable/log15-12       30.08µs ± 2%   30.07µs ± 2%    ~     (p=0.803 n=48+47)
AddingFields/sirupsen/logrus-12             6.683µs ± 3%   6.735µs ± 3%  +0.78%  (p=0.000 n=43+42)

[Geo mean]                                  143.5µs        143.3µs       -0.16%

Change-Id: I637203c75c837737f1febced75d5985703e51044
Reviewed-on: https://go-review.googlesource.com/114655
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Ilya Tocar <ilya.tocar@intel.com>
2018-08-20 14:17:20 +00:00
.github .github: use HTTPS for Stack Overflow link in SUPPORT.md 2018-06-12 11:08:14 +00:00
api api: add ErrorHandler function to httputil.ReverseProxy 2018-07-19 20:39:19 +00:00
doc doc/go1.11: Delve 1.1.0 added support for method calls 2018-08-20 02:42:36 +00:00
lib/time lib/time: update vendored tzdata to release 2018e 2018-06-11 14:47:06 +00:00
misc misc/cgo/testcshared: force descriptor 30 to be closed when execing test 2018-08-01 23:10:11 +00:00
src cmd/compile: split slow 3 operand LEA instructions into two LEAs 2018-08-20 14:17:20 +00:00
test cmd/compile/internal/gc: add nil check for closure call on wasm 2018-08-14 09:19:38 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: second and final round of updates for Go 1.11 2018-08-12 19:56:28 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: second and final round of updates for Go 1.11 2018-08-12 19:56:28 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS
README.md README: linkify some paths 2018-06-06 18:07:01 +00:00
robots.txt

README.md

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