- 13 Apr, 2016 26 commits
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David Crawshaw authored
By replacing the *string used to represent pkgPath with a reflect.name everywhere, the embedded *string for package paths inside the reflect.name can be replaced by an offset, nameOff. This reduces the number of pointers in the type information. This also moves all reflect.name types into the same section, making it possible to use nameOff more widely in later CLs. No significant binary size change for normal binaries, but: linux/amd64 PIE: cmd/go: -440KB (3.7%) jujud: -2.6MB (3.2%) For #6853. Change-Id: I3890b132a784a1090b1b72b32febfe0bea77eaee Reviewed-on: https://go-review.googlesource.com/21395 Run-TryBot: David Crawshaw <crawshaw@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Ian Lance Taylor <iant@golang.org>
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Brad Fitzpatrick authored
Change-Id: If0e0bc5a85101db1e70faaab168fc2d12024eb93 Reviewed-on: https://go-review.googlesource.com/22005Reviewed-by:
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Brad Fitzpatrick authored
Merge them together into os1_darwin.go. A future CL will rename it. Change-Id: Ia4380d3296ebd5ce210908ce3582ff184566f692 Reviewed-on: https://go-review.googlesource.com/22004 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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David Crawshaw authored
Fixes #15104. Change-Id: I9ddfbbf39ef0a873b703ee3e04fbb7d1192f5f39 Reviewed-on: https://go-review.googlesource.com/21581 Run-TryBot: David Crawshaw <crawshaw@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Todd Neal authored
We do two O(n) scans of all values in an eqclass when computing substitutions for CSE. In unfortunate cases, like those found in #15112, we can have a large eqclass composed of values found in blocks none of whom dominate the other. This leads to O(n^2) behavior. The elements are removed one at a time, with O(n) scans each time. This CL removes the linear scan by sorting the eqclass so that dominant values will be sorted first. As long as we also ensure we don't disturb the sort order, then we no longer need to scan for the maximally dominant value. For the code in issue #15112: Before: real 1m26.094s user 1m30.776s sys 0m1.125s Aefter: real 0m52.099s user 0m56.829s sys 0m1.092s Updates #15112 Change-Id: Ic4f8680ed172e716232436d31963209c146ef850 Reviewed-on: https://go-review.googlesource.com/21981Reviewed-by:
Josh Bleecher Snyder <josharian@gmail.com> Run-TryBot: Todd Neal <todd@tneal.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Austin Clements authored
Make it clear that the point of this function stores a pointer *without* a write barrier. sed -i -e 's/Storep1/StorepNoWB/' $(git grep -l Storep1) Updates #15270. Change-Id: Ifad7e17815e51a738070655fe3b178afdadaecf6 Reviewed-on: https://go-review.googlesource.com/21994Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by:
Michael Matloob <matloob@golang.org>
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Dmitry Vyukov authored
Go runtime never emits PCs that are not a return address (except for cpu profiler). Change-Id: I08d9dc5c7c71e23f34f2f0c16f8baeeb4f64fcd6 Reviewed-on: https://go-review.googlesource.com/21735Reviewed-by:
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Robert Griesemer authored
Change-Id: Ic7a1fb0dbbf108052c970a4a830269a5673df7df Reviewed-on: https://go-review.googlesource.com/21963Reviewed-by:
Matthew Dempsky <mdempsky@google.com>
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Robert Griesemer authored
Instead of indicating with each function signature if it has an inlineable body, collect all functions in order and export function bodies with function index in platform-specific section. Moves this compiler specific information out of the platform-independent export data section, and removes an int value for all functions w/o body. Also simplifies the code a bit. Change-Id: I8b2d7299dbe81f2706be49ecfb9d9f7da85fd854 Reviewed-on: https://go-review.googlesource.com/21939Reviewed-by:
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Austin Clements authored
atomic.Storep1 is not supposed to invoke a write barrier (that's what atomicstorep is for), but currently does on s390x. This causes a panic in runtime.mapzero when it tries to use atomic.Storep1 to store what's actually a scalar. Fix this by eliminating the write barrier from atomic.Storep1 on s390x. Also add some documentation to atomicstorep to explain the difference between these. Fixes #15270. Change-Id: I291846732d82f090a218df3ef6351180aff54e81 Reviewed-on: https://go-review.googlesource.com/21993Reviewed-by:
Michael Munday <munday@ca.ibm.com>
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David Chase authored
For call-free inner loops. Revised statistics: 85 inner loop spills sunk 341 inner loop spills remaining 1162 inner loop spills that were candidates for sinking ended up completely register allocated 119 inner loop spills could have been sunk were used in "shuffling" at the bottom of the loop. 1 inner loop spill not sunk because the register assigned changed between def and exit, Understanding how to make an inner loop definition not be a candidate for from-memory shuffling (to force the shuffle code to choose some other value) should pick up some of the 119 other spills disqualified for this reason. Modified the stats printing based on feedback from Austin. Change-Id: If3fb9b5d5a028f42ccc36c4e3d9e0da39db5ca60 Reviewed-on: https://go-review.googlesource.com/21037Reviewed-by:Keith Randall <khr@golang.org> Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Lynn Boger authored
This change improves the performance of memmove on ppc64 & ppc64le mainly for moves >=32 bytes. In addition, the test to detect backward moves was enhanced to avoid backward moves if source and dest were in different types of storage, since backward moves might not always be efficient. Fixes #14507 The following shows some of the improvements from the test in the runtime package: BenchmarkMemmove32 4229.56 4717.13 1.12x BenchmarkMemmove64 6156.03 7810.42 1.27x BenchmarkMemmove128 7521.69 12468.54 1.66x BenchmarkMemmove256 6729.90 18260.33 2.71x BenchmarkMemmove512 8521.59 18033.81 2.12x BenchmarkMemmove1024 9760.92 25762.61 2.64x BenchmarkMemmove2048 10241.00 29584.94 2.89x BenchmarkMemmove4096 10399.37 31882.31 3.07x BenchmarkMemmoveUnalignedDst16 1943.69 2258.33 1.16x BenchmarkMemmoveUnalignedDst32 3885.08 3965.81 1.02x BenchmarkMemmoveUnalignedDst64 5121.63 6965.54 1.36x BenchmarkMemmoveUnalignedDst128 7212.34 11372.68 1.58x BenchmarkMemmoveUnalignedDst256 6564.52 16913.59 2.58x BenchmarkMemmoveUnalignedDst512 8364.35 17782.57 2.13x BenchmarkMemmoveUnalignedDst1024 9539.87 24914.72 2.61x BenchmarkMemmoveUnalignedDst2048 9199.23 21235.11 2.31x BenchmarkMemmoveUnalignedDst4096 10077.39 25231.99 2.50x BenchmarkMemmoveUnalignedSrc32 3249.83 3742.52 1.15x BenchmarkMemmoveUnalignedSrc64 5562.35 6627.96 1.19x BenchmarkMemmoveUnalignedSrc128 6023.98 10200.84 1.69x BenchmarkMemmoveUnalignedSrc256 6921.83 15258.43 2.20x BenchmarkMemmoveUnalignedSrc512 8593.13 16541.97 1.93x BenchmarkMemmoveUnalignedSrc1024 9730.95 22927.84 2.36x BenchmarkMemmoveUnalignedSrc2048 9793.28 21537.73 2.20x BenchmarkMemmoveUnalignedSrc4096 10132.96 26295.06 2.60x Change-Id: I73af59970d4c97c728deabb9708b31ec7e01bdf2 Reviewed-on: https://go-review.googlesource.com/21990Reviewed-by:
Bill O'Farrell <billotosyr@gmail.com> Reviewed-by:
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David Crawshaw authored
Minor cleanup. Change-Id: I7574f58a7e55c2bb798ebe9c7c98d36b8c258fb8 Reviewed-on: https://go-review.googlesource.com/21982 Run-TryBot: David Crawshaw <crawshaw@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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David Crawshaw authored
This CL introduces the typeOff type and a lookup method of the same name that can turn a typeOff offset into an *rtype. In a typical Go binary (built with buildmode=exe, pie, c-archive, or c-shared), there is one moduledata and all typeOff values are offsets relative to firstmoduledata.types. This makes computing the pointer cheap in typical programs. With buildmode=shared (and one day, buildmode=plugin) there are multiple modules whose relative offset is determined at runtime. We identify a type in the general case by the pair of the original *rtype that references it and its typeOff value. We determine the module from the original pointer, and then use the typeOff from there to compute the final *rtype. To ensure there is only one *rtype representing each type, the runtime initializes a typemap for each module, using any identical type from an earlier module when resolving that offset. This means that types computed from an offset match the type mapped by the pointer dynamic relocations. A series of followup CLs will replace other *rtype values with typeOff (and name/*string with nameOff). For types created at runtime by reflect, type offsets are treated as global IDs and reference into a reflect offset map kept by the runtime. darwin/amd64: cmd/go: -57KB (0.6%) jujud: -557KB (0.8%) linux/amd64 PIE: cmd/go: -361KB (3.0%) jujud: -3.5MB (4.2%) For #6853. Change-Id: Icf096fd884a0a0cb9f280f46f7a26c70a9006c96 Reviewed-on: https://go-review.googlesource.com/21285Reviewed-by:
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Alexandru Moșoi authored
Missed this in the previous CL where the shared dom tree was introduced. Change-Id: If0bd85d4b4567d7e87814ed511603b1303ab3903 Reviewed-on: https://go-review.googlesource.com/21970 Run-TryBot: Alexandru Moșoi <alexandru@mosoi.ro> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
David Chase <drchase@google.com>
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Shahar Kohanim authored
After non pcln fields were added to it in a previous commit. Change-Id: Icf92c0774d157c61399a6fc2a3c4d2cd47a634d2 Reviewed-on: https://go-review.googlesource.com/21921 Run-TryBot: Shahar Kohanim <skohanim@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
David Crawshaw <crawshaw@golang.org>
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Tal Shprecher authored
Map keys are currently validated in multiple locations but share a common validation routine. The problem is that early validations should be lenient enough to allow for forward types while the final validations should not. The final validations should fail on forward types since they've already settled. This change also separates the key type checking from the creation of the map via typMap. Instead of the mapqueue being populated in copytype() by checking the map line number, it's populated in the same block that validates the key type. This isolates key validation logic while type checking. Fixes #14988 Change-Id: Ia47cf6213585d6c63b3a35249104c0439feae658 Reviewed-on: https://go-review.googlesource.com/21830Reviewed-by:
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Matthew Dempsky authored
Fixes #11361. Change-Id: I70b8808f97f0e07de680e7e6ede1322ea0fdbbc0 Reviewed-on: https://go-review.googlesource.com/21936Reviewed-by:
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Tal Shprecher authored
Change-Id: Ica0ec84714d7f01d800d62fa10cdb08321d43cf3 Reviewed-on: https://go-review.googlesource.com/21967Reviewed-by:
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Matthew Dempsky authored
No need to acquire the M just to change G's paniconfault flag, and the original C implementation of SetPanicOnFault did not. The M acquisition logic is an artifact of golang.org/cl/131010044, which was started before golang.org/cl/123640043 (which introduced the current "getg" function) was submitted. Change-Id: I6d1939008660210be46904395cf5f5bbc2c8f754 Reviewed-on: https://go-review.googlesource.com/21935 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Brad Fitzpatrick authored
Automated change. Fixes #15269 Change-Id: I8deb2ac0101d3f7c390467ceb0a1561b72edbb2f Reviewed-on: https://go-review.googlesource.com/21962 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by:
Andrew Gerrand <adg@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Martin Möhrmann authored
Merges explodetests into splittests which already contain some of the tests that cover explode. Adds a test to cover the utf8.RuneError branch in explode. name old time/op new time/op delta Split1-2 14.9ms ± 0% 14.2ms ± 0% -4.06% (p=0.000 n=47+49) Change-Id: I00f796bd2edab70e926ea9e65439d820c6a28254 Reviewed-on: https://go-review.googlesource.com/21609 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Emmanuel Odeke authored
Adds examples showing loading templates from files and executing them. Shows examples: - Using ParseGlob. - Using ParseFiles. - Using helper functions to share and use templates in different contexts by adding them to an existing bundle of templates. - Using a group of driver templates with distinct sets of helper templates. Almost all of the code was directly copied from text/template. Fixes #8500 Change-Id: Ic3d91d5232afc5a1cd2d8cd3d9a5f3b754c64225 Reviewed-on: https://go-review.googlesource.com/21854Reviewed-by:
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Josh Bleecher Snyder authored
runtime.newobject never returns the same thing twice, so the resulting value will never be a common subexpression. This helps when compiling large static data structures that include pointers, such as maps and slices. No clear performance impact on other code. (See below.) For the code in issue #15112: Before: real 1m14.238s user 1m18.985s sys 0m0.787s After: real 0m47.172s user 0m52.248s sys 0m0.767s For the code in issue #15235, size 10k: Before: real 0m44.916s user 0m46.577s sys 0m0.304s After: real 0m7.703s user 0m9.041s sys 0m0.316s Still more work to be done, particularly for #15112. Updates #15112 Updates #15235 name old time/op new time/op delta Template 330ms ±11% 333ms ±13% ~ (p=0.749 n=20+19) Unicode 148ms ± 6% 152ms ± 8% ~ (p=0.072 n=18+20) GoTypes 1.01s ± 7% 1.01s ± 3% ~ (p=0.583 n=20+20) Compiler 5.04s ± 2% 5.06s ± 2% ~ (p=0.314 n=20+20) name old user-ns/op new user-ns/op delta Template 444user-ms ±11% 445user-ms ±10% ~ (p=0.738 n=20+20) Unicode 215user-ms ± 5% 218user-ms ± 5% ~ (p=0.239 n=18+18) GoTypes 1.45user-s ± 3% 1.45user-s ± 4% ~ (p=0.620 n=20+20) Compiler 7.23user-s ± 2% 7.22user-s ± 2% ~ (p=0.901 n=20+19) name old alloc/op new alloc/op delta Template 55.0MB ± 0% 55.0MB ± 0% ~ (p=0.547 n=20+20) Unicode 37.6MB ± 0% 37.6MB ± 0% ~ (p=0.301 n=20+20) GoTypes 177MB ± 0% 177MB ± 0% ~ (p=0.065 n=20+19) Compiler 798MB ± 0% 797MB ± 0% -0.05% (p=0.000 n=19+20) name old allocs/op new allocs/op delta Template 492k ± 0% 493k ± 0% +0.03% (p=0.030 n=20+20) Unicode 377k ± 0% 377k ± 0% ~ (p=0.423 n=20+19) GoTypes 1.40M ± 0% 1.40M ± 0% ~ (p=0.102 n=20+20) Compiler 5.53M ± 0% 5.53M ± 0% ~ (p=0.094 n=17+18) name old text-bytes new text-bytes delta HelloSize 561k ± 0% 561k ± 0% ~ (all samples are equal) CmdGoSize 6.13M ± 0% 6.13M ± 0% ~ (all samples are equal) name old data-bytes new data-bytes delta HelloSize 128k ± 0% 128k ± 0% ~ (all samples are equal) CmdGoSize 306k ± 0% 306k ± 0% ~ (all samples are equal) name old exe-bytes new exe-bytes delta HelloSize 905k ± 0% 905k ± 0% ~ (all samples are equal) CmdGoSize 9.64M ± 0% 9.64M ± 0% ~ (all samples are equal) Change-Id: Id774e2901d7701a3ec7a1c1d1cf1d9327a4107fc Reviewed-on: https://go-review.googlesource.com/21937 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Todd Neal <todd@tneal.org>
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Keith Randall authored
getcallerpc's arg needs to point to the first argument slot. I believe this bug was introduced by Michel's itab changes (specifically https://go-review.googlesource.com/c/20902). Fixes #15145 Change-Id: Ifb2e17f3658e2136c7950dfc789b4d5706320683 Reviewed-on: https://go-review.googlesource.com/21931Reviewed-by:
Michel Lespinasse <walken@google.com>
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Shahar Kohanim authored
name old secs new secs delta LinkCmdGo 0.53 ± 9% 0.53 ±10% -1.30% (p=0.022 n=100+99) name old MaxRSS new MaxRSS delta LinkCmdGo 151k ± 4% 142k ± 6% -5.92% (p=0.000 n=98+100) Change-Id: Ic30e63a948f8e626b3396f458a0163f7234810c1 Reviewed-on: https://go-review.googlesource.com/21920 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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- 12 Apr, 2016 14 commits
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Brad Fitzpatrick authored
Change-Id: Iba40edc9ddad62534b06c5af20bbc3dd3dc14d0a Reviewed-on: https://go-review.googlesource.com/21881Reviewed-by:
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Ian Lance Taylor authored
Gccgo was erroneously marking Call results as addressable, which led to an obscure bug using text/template, as text/template calls CanAddr to check whether to take the address of a value when looking up methods. When a function returned a pointer, and CanAddr was true, the result was a pointer to a pointer that had no methods. Fixed in gccgo by https://golang.org/cl/21908. Adding the test here so that it doesn't regress. Change-Id: I1d25b868e1b8e2348b21cbac6404a636376d1a4a Reviewed-on: https://go-review.googlesource.com/21930 Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by:
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Martin Möhrmann authored
Use one comparison to detect underflow and overflow simultaneously. Use a shift, bitwise complement and uint8 type conversion to handle clamping to upper and lower bound without additional branching. Overall the new code is faster for a mix of common case, underflow and overflow. name old time/op new time/op delta YCbCr-2 1.12ms ± 0% 0.64ms ± 0% -43.01% (p=0.000 n=48+47) name old time/op new time/op delta YCbCrToRGB/0-2 5.52ns ± 0% 5.77ns ± 0% +4.48% (p=0.000 n=50+49) YCbCrToRGB/128-2 6.05ns ± 0% 5.52ns ± 0% -8.69% (p=0.000 n=39+50) YCbCrToRGB/255-2 5.80ns ± 0% 5.77ns ± 0% -0.58% (p=0.000 n=50+49) Found in collaboration with Josh Bleecher Snyder and Ralph Corderoy. Change-Id: Ic5020320f704966f545fdc1ae6bc24ddb5d3d09a Reviewed-on: https://go-review.googlesource.com/21910Reviewed-by:
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Brad Fitzpatrick authored
Updates #15262 Change-Id: I3eb1f6f71d6285d039f11ba6a34b8a599a33bf49 Reviewed-on: https://go-review.googlesource.com/21909 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by:
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Brad Fitzpatrick authored
Fixes the darwin/arm builder, which has a special test runner which makes the assumption that tests never use testdata from another package. This looks large, but it's no more space in git. Change-Id: I81921b516443d12d21b77617d323ddebedbe40f8 Reviewed-on: https://go-review.googlesource.com/21907Reviewed-by:
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Matthew Dempsky authored
Change-Id: Ie8323cfcd1193f390729d0d3dd67863aedf47d13 Reviewed-on: https://go-review.googlesource.com/21906 Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by:
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Josh Bleecher Snyder authored
Running stress -p 1 go test -short std on a heavily loaded machine causes net timeouts every 15 or 20 runs. Making these tests not run in parallel helps. With this change, I haven’t seen a single failure in over 100 runs. Fixes #14986 Change-Id: Ibaa14869ce8d95b00266aee94d62d195927ede68 Reviewed-on: https://go-review.googlesource.com/21905 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by:
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Dan Peterson authored
Standardize on space between "RFC" and number. Additionally change the couple "a RFC" instances to "an RFC." Fixes #15258 Change-Id: I2b17ecd06be07dfbb4207c690f52a59ea9b04808 Reviewed-on: https://go-review.googlesource.com/21902Reviewed-by:
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Shahar Kohanim authored
Only splits into separate files, no other changes. Change-Id: Icc0da2c5f18e03e9ed7c0043bd7c790f741900f2 Reviewed-on: https://go-review.googlesource.com/21804Reviewed-by:
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David Crawshaw authored
This is the first in a series of CLs to replace the use of pointers in binary read-only data with offsets. In standard Go binaries these CLs have a small effect, shrinking 8-byte pointers to 4-bytes. In position-independent code, it also saves the dynamic relocation for the pointer. This has a significant effect on the binary size when building as PIE, c-archive, or c-shared. darwin/amd64: cmd/go: -12KB (0.1%) jujud: -82KB (0.1%) linux/amd64 PIE: cmd/go: -86KB (0.7%) jujud: -569KB (0.7%) For #6853. Change-Id: Iad5625bbeba58dabfd4d334dbee3fcbfe04b2dcf Reviewed-on: https://go-review.googlesource.com/21284Reviewed-by:
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Brad Fitzpatrick authored
These builders (on Linaro) have a different network configuration which is incompatible with this test. Or so it seems. Updates #15191 Change-Id: Ibfeacddc98dac1da316e704b5c8491617a13e3bf Reviewed-on: https://go-review.googlesource.com/21901Reviewed-by:
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Alberto Donizetti authored
Fixes #15225 Change-Id: I1f85590b2c3293463c6476beebcd3256adc1bf23 Reviewed-on: https://go-review.googlesource.com/21802Reviewed-by:
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Dan Peterson authored
Fixes #14776 Change-Id: I55423ac643f18542b9fd1386ed98dec47fb678aa Reviewed-on: https://go-review.googlesource.com/21890Reviewed-by:
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Matthew Dempsky authored
Passes toolstash -cmp. Change-Id: Id504e71ed1f23900e24a9aed25143c94f4d7d50c Reviewed-on: https://go-review.googlesource.com/21899 Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by:
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