- 03 Feb, 2017 26 commits
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Russ Cox authored
Address review comments from earlier CLs. These are changes I was too scared to try to push down into the original CLs (thanks, Git). Change-Id: I0e428fad73d71bd2a7d08178cf2e856de3cef19f Reviewed-on: https://go-review.googlesource.com/36257Reviewed-by:
David Crawshaw <crawshaw@golang.org>
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: Ib22fc435827d4a05a77a5200ac437ce00e2a4da3 Reviewed-on: https://go-review.googlesource.com/36204Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: I05629567cc33fef41bc74eba4f7ff66e4851343c Reviewed-on: https://go-review.googlesource.com/36203Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: Iec17bf2243de129942ae5fba126ec5f217be7303 Reviewed-on: https://go-review.googlesource.com/36202Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: I2f349150659b6ddf6be4c675abba38dfe57ff652 Reviewed-on: https://go-review.googlesource.com/36201Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: I28b20d53d20dff06eede574eb5c20359db0d3991 Reviewed-on: https://go-review.googlesource.com/36200Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: I8e325d75f553b5d0b6224b56a705d2e2cb895de4 Reviewed-on: https://go-review.googlesource.com/36199Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: I2d0ccdb84814537ab8b8842aa1b5f5bc0a88a0fc Reviewed-on: https://go-review.googlesource.com/36198Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: Icdd181098f9f0e81f68bf201e6867cdd8f820300 Reviewed-on: https://go-review.googlesource.com/36197Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: Ic802483e50598def638f1e2e706d5fdf7822d32d Reviewed-on: https://go-review.googlesource.com/36196Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: I20dbc352c3df3c83a75811dd8e78c580a46b2202 Reviewed-on: https://go-review.googlesource.com/36195Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: I4cf05b076d81b780c87a31378523929b5da8964b Reviewed-on: https://go-review.googlesource.com/36194Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: I7c5dde6e7fe4f390e6607303b4d42535c674eac3 Reviewed-on: https://go-review.googlesource.com/36193Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: I6ee5b053683034ea9462a9a0a4ea4f5ad24fa5a1 Reviewed-on: https://go-review.googlesource.com/36192Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: Icb3f168ade91e7da5fcab89ac75b768daefff359 Reviewed-on: https://go-review.googlesource.com/36191Reviewed-by:
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Russ Cox authored
This is one CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: I63f578f5ac99c707b599ac5659293c46b275567d Reviewed-on: https://go-review.googlesource.com/36190Reviewed-by:
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Russ Cox authored
This CL makes a few naming changes to break dependencies between different parts of the go command, to make it easier to split into different packages. This is the first CL in a long sequence of changes to break up the go command from one package into a plausible group of packages. This sequence is concerned only with moving code, not changing or cleaning up code. There will still be more cleanup after this sequence. The entire sequence will be submitted together: it is not a goal for the tree to build at every step. For #18653. Change-Id: I69a98b9ea48e61b1e1cda95273d29860b525415f Reviewed-on: https://go-review.googlesource.com/36129Reviewed-by:
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Elias Naur authored
Before this CL, Go programs in c-archive or c-shared buildmodes would not handle SIGPIPE. That leads to surprising behaviour where writes on a closed pipe or socket would raise SIGPIPE and terminate the program. This CL changes the Go runtime to handle SIGPIPE regardless of buildmode. In addition, SIGPIPE from non-Go code is forwarded. This is a refinement of CL 32796 that fixes the case where a non-default handler for SIGPIPE is installed by the host C program. Fixes #17393 Change-Id: Ia41186e52c1ac209d0a594bae9904166ae7df7de Reviewed-on: https://go-review.googlesource.com/35960 Run-TryBot: Elias Naur <elias.naur@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Ian Lance Taylor <iant@golang.org>
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Josh Bleecher Snyder authored
When the number of variables in a function is very large, liveness analysis gets less efficient, since every bit vector is O(number of variables). Improve the situation by returning a sparse representation from progeffects. In all scenarios, progeffects either returns a slice that is shared function-wide, and which is usually small, or a slice that is guaranteed to have at most three values. Reduces compilation time for the code in #8225 Comment 1 by ~10%. Minor effects on regular packages (below). Passes toolstash -cmp. Updates #8225 name old time/op new time/op delta Template 215ms ± 2% 212ms ± 4% -1.31% (p=0.001 n=30+30) Unicode 98.3ms ± 3% 98.4ms ± 5% ~ (p=0.971 n=30+30) GoTypes 657ms ± 3% 651ms ± 2% -0.98% (p=0.001 n=30+27) Compiler 2.78s ± 2% 2.77s ± 2% -0.60% (p=0.006 n=30+30) Flate 130ms ± 4% 130ms ± 4% ~ (p=0.712 n=29+30) GoParser 159ms ± 5% 158ms ± 3% ~ (p=0.331 n=29+30) Reflect 406ms ± 3% 404ms ± 3% -0.69% (p=0.041 n=29+30) Tar 117ms ± 4% 117ms ± 3% ~ (p=0.886 n=30+29) XML 219ms ± 2% 217ms ± 2% ~ (p=0.091 n=29+24) name old user-ns/op new user-ns/op delta Template 272user-ms ± 3% 270user-ms ± 3% -1.03% (p=0.004 n=30+30) Unicode 138user-ms ± 2% 138user-ms ± 3% ~ (p=0.902 n=29+29) GoTypes 891user-ms ± 2% 883user-ms ± 2% -0.95% (p=0.000 n=29+29) Compiler 3.85user-s ± 2% 3.84user-s ± 2% ~ (p=0.236 n=30+30) Flate 167user-ms ± 2% 166user-ms ± 4% ~ (p=0.511 n=28+30) GoParser 211user-ms ± 4% 210user-ms ± 3% ~ (p=0.287 n=29+30) Reflect 539user-ms ± 3% 536user-ms ± 2% -0.59% (p=0.034 n=29+30) Tar 154user-ms ± 3% 155user-ms ± 4% ~ (p=0.786 n=30+30) XML 289user-ms ± 3% 288user-ms ± 4% ~ (p=0.249 n=30+26) name old alloc/op new alloc/op delta Template 40.7MB ± 0% 40.8MB ± 0% +0.09% (p=0.001 n=30+30) Unicode 30.8MB ± 0% 30.8MB ± 0% ~ (p=0.112 n=30+30) GoTypes 123MB ± 0% 124MB ± 0% +0.09% (p=0.000 n=30+30) Compiler 473MB ± 0% 473MB ± 0% +0.05% (p=0.000 n=30+30) Flate 26.5MB ± 0% 26.5MB ± 0% ~ (p=0.186 n=29+30) GoParser 32.3MB ± 0% 32.4MB ± 0% +0.07% (p=0.021 n=28+30) Reflect 84.4MB ± 0% 84.6MB ± 0% +0.21% (p=0.000 n=30+30) Tar 27.3MB ± 0% 27.3MB ± 0% +0.09% (p=0.010 n=30+28) XML 44.7MB ± 0% 44.7MB ± 0% +0.07% (p=0.002 n=30+30) name old allocs/op new allocs/op delta Template 401k ± 1% 400k ± 1% ~ (p=0.321 n=30+30) Unicode 331k ± 1% 331k ± 1% ~ (p=0.357 n=30+28) GoTypes 1.24M ± 0% 1.24M ± 1% -0.19% (p=0.001 n=30+30) Compiler 4.27M ± 0% 4.27M ± 0% -0.13% (p=0.000 n=30+30) Flate 252k ± 1% 251k ± 1% -0.30% (p=0.005 n=30+30) GoParser 325k ± 1% 325k ± 1% ~ (p=0.224 n=28+30) Reflect 1.06M ± 0% 1.05M ± 0% -0.34% (p=0.000 n=30+30) Tar 266k ± 1% 266k ± 1% ~ (p=0.333 n=30+30) XML 416k ± 1% 415k ± 1% ~ (p=0.144 n=30+29) Change-Id: I6ba67a9203516373062a2618122306da73333d98 Reviewed-on: https://go-review.googlesource.com/36211 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Matthew Dempsky <mdempsky@google.com>
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Chris Broadfoot authored
Change-Id: I3b1317f0ab46e03d8c5a0af74c83183710a75055 Reviewed-on: https://go-review.googlesource.com/36214Reviewed-by:
Russ Cox <rsc@golang.org> Reviewed-by:
Rob Pike <r@golang.org>
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Russ Cox authored
See https://golang.org/design/12914-monotonic for details. Fixes #12914. Change-Id: I80edc2e6c012b4ace7161c84cf067d444381a009 Reviewed-on: https://go-review.googlesource.com/36255 Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Caleb Spare <cespare@gmail.com> Reviewed-by:
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Keith Randall authored
If there is a defer, and that defer recovers, then the caller can see all of the output parameters. That means that we must mark all the output parameters live at any point which might panic. If there is no defer then this is not necessary. This is implemented. We could also detect whether there is a recover in any of the defers. If not, we would need to mark only output params that the defer actually references (and the closure mechanism already does that). This is not implemented. Fixes #18860. Change-Id: If984fe6686eddce9408bf25e725dd17fc16b8578 Reviewed-on: https://go-review.googlesource.com/36030Reviewed-by:
Austin Clements <austin@google.com> Reviewed-by:
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Josh Bleecher Snyder authored
These rules trigger 116 times while running make.bash. And at least for the sample code at https://github.com/golang/go/issues/18906#issuecomment-277174241 they are providing optimizations not already present in amd64. Updates #18906 Change-Id: I410a480f566f5ab176fc573fb5ac74f9cffec225 Reviewed-on: https://go-review.googlesource.com/36217 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by:
Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Josh Bleecher Snyder authored
This speeds up compilation of the code in #8225 by 25%-30%. The complexity of the algorithm is unchanged, but this shrinks the constant factor so much that it doesn't matter, even the size of the giant type switch gets scaled up dramatically. name old time/op new time/op delta Template 218ms ± 5% 217ms ±10% ~ (p=0.163 n=27+30) Unicode 98.2ms ± 6% 97.7ms ±10% ~ (p=0.150 n=27+29) GoTypes 654ms ± 5% 650ms ± 5% ~ (p=0.350 n=30+30) Compiler 2.70s ± 4% 2.68s ± 3% ~ (p=0.128 n=30+29) name old user-ns/op new user-ns/op delta Template 276user-ms ± 6% 271user-ms ± 7% -1.83% (p=0.003 n=29+28) Unicode 138user-ms ± 5% 137user-ms ± 4% ~ (p=0.071 n=27+27) GoTypes 881user-ms ± 4% 877user-ms ± 4% ~ (p=0.423 n=30+30) Compiler 3.76user-s ± 4% 3.72user-s ± 2% -0.84% (p=0.028 n=30+29) name old alloc/op new alloc/op delta Template 40.7MB ± 0% 40.7MB ± 0% ~ (p=0.936 n=30+30) Unicode 30.8MB ± 0% 30.8MB ± 0% ~ (p=0.859 n=28+30) GoTypes 123MB ± 0% 123MB ± 0% ~ (p=0.273 n=30+30) Compiler 472MB ± 0% 472MB ± 0% ~ (p=0.432 n=30+30) name old allocs/op new allocs/op delta Template 401k ± 1% 401k ± 1% ~ (p=0.859 n=30+30) Unicode 331k ± 0% 331k ± 1% ~ (p=0.823 n=28+30) GoTypes 1.24M ± 0% 1.24M ± 0% ~ (p=0.286 n=30+30) Compiler 4.26M ± 0% 4.26M ± 0% ~ (p=0.359 n=30+30) Change-Id: Ia850065a9a84c07a5b0b4e23c1758b5679498da7 Reviewed-on: https://go-review.googlesource.com/36112 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Keith Randall authored
sigtramp was calling sigtrampgo and depending on the fact that the 3rd argument slot will not be modified on return. Our calling convention doesn't guarantee that. Avoid that assumption. There's no actual bug here, as sigtrampgo does not in fact modify its argument slots. But I found this while working on the dead stack slot clobbering tool. https://go-review.googlesource.com/c/23924/ Change-Id: Ia7e791a2b4c1c74fff24cba8169e7840b4b06ffc Reviewed-on: https://go-review.googlesource.com/36216 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Russ Cox authored
The name lookups are unrooted; the test should be unrooted too. Correctly skips the tests if the DNS config specifies a domain suffix that has a wildcard entry causing all unrooted names to resolve. Change-Id: I80470326a5d332f3b8d64663f765fd304c5e0811 Reviewed-on: https://go-review.googlesource.com/36253 Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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- 02 Feb, 2017 14 commits
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Josh Bleecher Snyder authored
name old time/op new time/op delta Template 218ms ± 3% 214ms ± 3% -1.70% (p=0.000 n=30+30) Unicode 100ms ± 3% 100ms ± 4% ~ (p=0.614 n=29+30) GoTypes 657ms ± 1% 660ms ± 3% +0.46% (p=0.046 n=29+30) Compiler 2.80s ± 2% 2.80s ± 1% ~ (p=0.451 n=28+29) Flate 131ms ± 2% 132ms ± 4% ~ (p=1.000 n=29+29) GoParser 159ms ± 3% 160ms ± 5% ~ (p=0.341 n=28+30) Reflect 406ms ± 3% 408ms ± 4% ~ (p=0.511 n=28+30) Tar 118ms ± 4% 118ms ± 4% ~ (p=0.827 n=29+30) XML 222ms ± 6% 222ms ± 3% ~ (p=0.532 n=30+30) name old user-ns/op new user-ns/op delta Template 274user-ms ± 3% 272user-ms ± 3% -0.87% (p=0.015 n=29+30) Unicode 140user-ms ± 4% 140user-ms ± 3% ~ (p=0.735 n=29+30) GoTypes 890user-ms ± 1% 897user-ms ± 2% +0.88% (p=0.002 n=29+30) Compiler 3.88user-s ± 2% 3.89user-s ± 1% ~ (p=0.132 n=30+29) Flate 168user-ms ± 2% 157user-ms ± 4% -6.21% (p=0.000 n=25+28) GoParser 211user-ms ± 2% 213user-ms ± 5% ~ (p=0.086 n=28+30) Reflect 539user-ms ± 2% 541user-ms ± 3% ~ (p=0.267 n=27+29) Tar 156user-ms ± 7% 155user-ms ± 5% ~ (p=0.708 n=30+30) XML 291user-ms ± 5% 294user-ms ± 3% +0.83% (p=0.029 n=29+30) name old alloc/op new alloc/op delta Template 40.7MB ± 0% 39.4MB ± 0% -3.26% (p=0.000 n=29+26) Unicode 30.8MB ± 0% 30.7MB ± 0% -0.40% (p=0.000 n=28+30) GoTypes 123MB ± 0% 119MB ± 0% -3.47% (p=0.000 n=30+29) Compiler 472MB ± 0% 455MB ± 0% -3.60% (p=0.000 n=30+30) Flate 26.5MB ± 0% 25.6MB ± 0% -3.21% (p=0.000 n=28+30) GoParser 32.3MB ± 0% 31.4MB ± 0% -2.98% (p=0.000 n=29+30) Reflect 84.4MB ± 0% 82.1MB ± 0% -2.83% (p=0.000 n=30+30) Tar 27.3MB ± 0% 26.5MB ± 0% -2.70% (p=0.000 n=29+29) XML 44.6MB ± 0% 43.1MB ± 0% -3.49% (p=0.000 n=30+30) name old allocs/op new allocs/op delta Template 401k ± 1% 399k ± 0% -0.35% (p=0.000 n=30+28) Unicode 331k ± 0% 331k ± 1% ~ (p=0.907 n=28+30) GoTypes 1.24M ± 0% 1.23M ± 0% -0.43% (p=0.000 n=30+30) Compiler 4.26M ± 0% 4.25M ± 0% -0.34% (p=0.000 n=29+30) Flate 252k ± 1% 251k ± 1% -0.41% (p=0.000 n=30+30) GoParser 325k ± 1% 324k ± 1% -0.31% (p=0.000 n=27+30) Reflect 1.06M ± 0% 1.05M ± 0% -0.69% (p=0.000 n=30+30) Tar 266k ± 1% 265k ± 1% -0.51% (p=0.000 n=29+30) XML 416k ± 1% 415k ± 1% -0.36% (p=0.002 n=30+30) Change-Id: I8f784001324df83b2764c44f0e83a540e5beab34 Reviewed-on: https://go-review.googlesource.com/36212 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by:
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Cherry Zhang authored
It seems the problem is on gdb and the dynamic linker. Skip the test for now until we figure out what's going on with the system. Updates #18784. Change-Id: Ic9320ffd463f6c231b2c4192652263b1cf7f4231 Reviewed-on: https://go-review.googlesource.com/36250 Run-TryBot: Cherry Zhang <cherryyz@google.com> Reviewed-by:
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Jaana Burcu Dogan authored
Change-Id: I4fdd81aa7c9b180cb72ec4af3e7d9d803c99ecac Reviewed-on: https://go-review.googlesource.com/36033Reviewed-by:
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Cherry Zhang authored
Change-Id: I9ed5a2065cef06708e319b16c801da2eff42004e Reviewed-on: https://go-review.googlesource.com/35497 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Cherry Zhang authored
Fixes #18003. Change-Id: Iadcc5c424c64badecfb5fdbd4dbd9197df56182c Reviewed-on: https://go-review.googlesource.com/33421 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Robert Griesemer authored
Also: Remove double "go:" prefix in related error message. Fixes #18882. Change-Id: Ifbbd8e2f7529b43f035d3dbf7ca4a91f212bc6b6 Reviewed-on: https://go-review.googlesource.com/36121 Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Lars Wiegman authored
The existing darwin/amd64 implementation of runtime.nanotime returns the wallclock time, which results in timers not functioning properly when system time runs backwards. By implementing the algorithm used by the darwin syscall mach_absolute_time, timers will function as expected. The algorithm is described at https://opensource.apple.com/source/xnu/xnu-3248.60.10/libsyscall/wrappers/mach_absolute_time.s Fixes #17610 Change-Id: I9c8d35240d48249a6837dca1111b1406e2686f67 Reviewed-on: https://go-review.googlesource.com/35292Reviewed-by:
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Josh Bleecher Snyder authored
Fixes #18402 Change-Id: I5af800857fb2e365ce4224eece9171277106ec7d Reviewed-on: https://go-review.googlesource.com/35562 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Keith Randall authored
Use (-x)>>63 instead of ((x-1)>>63)^-1 to get a mask that is 0 when x is 0 and all ones when x is positive. Saves one instruction when slicing. Change-Id: Ib46d53d3aac6530ac481fa2f265a6eadf3df0567 Reviewed-on: https://go-review.googlesource.com/35641 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Cherry Zhang <cherryyz@google.com>
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Josh Bleecher Snyder authored
Based in part on khr's CL 2500. Updates #17725 Updates #18121 Change-Id: I744e1f92fc2104e6c5bd883a898c30b2eea8cc31 Reviewed-on: https://go-review.googlesource.com/35555 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Josh Bleecher Snyder authored
The order pass is responsible for ensuring that values passed to runtime functions, including convT2E/convT2I, are addressable. Prior to this CL, this was always accomplished by creating a temp, which frequently escaped to the heap, causing allocations, perhaps most notably in code like: fmt.Println(1, 2, 3) // allocates three times None of the runtime routines modify the contents of the pointers they receive, so in the case of constants, instead of creating a temp value, we can create a static value. (Marking the static value as read-only provides protection against accidental attempts by the runtime to modify the constant data.) This improves code generation for code like: panic("abc") c <- 2 // c is a chan int which can now simply refer to "abc" and 2, rather than going by way of a temporary. It also allows us to optimize convT2E/convT2I, by recognizing static readonly values and directly constructing the interface. This CL adds ~0.5% to binary size, despite decreasing the size of many functions, because it also adds many static symbols. This binary size regression could be recovered in future (but currently unplanned) work. There is a lot of content-duplication in these symbols; this statement generates six new symbols, three containing an int 1 and three containing a pointer to the string "a": fmt.Println(1, 1, 1, "a", "a", "a") These symbols could be made content-addressable. Furthermore, these symbols are small, so the alignment and naming overhead is large. As with the go.strings section, these symbols could be hidden and have their alignment reduced. The changes to test/live.go make it impossible (at least with current optimization techniques) to place the values being passed to the runtime in static symbols, preserving autotmp creation. Fixes #18704 Benchmarks from fmt and go-kit's logging package: github.com/go-kit/kit/log name old time/op new time/op delta JSONLoggerSimple-8 1.91µs ± 2% 2.11µs ±22% ~ (p=1.000 n=9+10) JSONLoggerContextual-8 2.60µs ± 6% 2.43µs ± 2% -6.29% (p=0.000 n=9+10) Discard-8 101ns ± 2% 34ns ±14% -66.33% (p=0.000 n=10+9) OneWith-8 161ns ± 1% 102ns ±16% -36.78% (p=0.000 n=10+10) TwoWith-8 175ns ± 3% 106ns ± 7% -39.36% (p=0.000 n=10+9) TenWith-8 293ns ± 3% 227ns ±15% -22.44% (p=0.000 n=9+10) LogfmtLoggerSimple-8 704ns ± 2% 608ns ± 2% -13.65% (p=0.000 n=10+9) LogfmtLoggerContextual-8 962ns ± 1% 860ns ±17% -10.57% (p=0.003 n=9+10) NopLoggerSimple-8 188ns ± 1% 120ns ± 1% -36.39% (p=0.000 n=9+10) NopLoggerContextual-8 379ns ± 1% 243ns ± 0% -35.77% (p=0.000 n=9+10) ValueBindingTimestamp-8 577ns ± 1% 499ns ± 1% -13.51% (p=0.000 n=10+10) ValueBindingCaller-8 898ns ± 2% 844ns ± 2% -6.00% (p=0.000 n=10+10) name old alloc/op new alloc/op delta JSONLoggerSimple-8 904B ± 0% 872B ± 0% -3.54% (p=0.000 n=10+10) JSONLoggerContextual-8 1.20kB ± 0% 1.14kB ± 0% -5.33% (p=0.000 n=10+10) Discard-8 64.0B ± 0% 32.0B ± 0% -50.00% (p=0.000 n=10+10) OneWith-8 96.0B ± 0% 64.0B ± 0% -33.33% (p=0.000 n=10+10) TwoWith-8 160B ± 0% 128B ± 0% -20.00% (p=0.000 n=10+10) TenWith-8 672B ± 0% 640B ± 0% -4.76% (p=0.000 n=10+10) LogfmtLoggerSimple-8 128B ± 0% 96B ± 0% -25.00% (p=0.000 n=10+10) LogfmtLoggerContextual-8 304B ± 0% 240B ± 0% -21.05% (p=0.000 n=10+10) NopLoggerSimple-8 128B ± 0% 96B ± 0% -25.00% (p=0.000 n=10+10) NopLoggerContextual-8 304B ± 0% 240B ± 0% -21.05% (p=0.000 n=10+10) ValueBindingTimestamp-8 159B ± 0% 127B ± 0% -20.13% (p=0.000 n=10+10) ValueBindingCaller-8 112B ± 0% 80B ± 0% -28.57% (p=0.000 n=10+10) name old allocs/op new allocs/op delta JSONLoggerSimple-8 19.0 ± 0% 17.0 ± 0% -10.53% (p=0.000 n=10+10) JSONLoggerContextual-8 25.0 ± 0% 21.0 ± 0% -16.00% (p=0.000 n=10+10) Discard-8 3.00 ± 0% 1.00 ± 0% -66.67% (p=0.000 n=10+10) OneWith-8 3.00 ± 0% 1.00 ± 0% -66.67% (p=0.000 n=10+10) TwoWith-8 3.00 ± 0% 1.00 ± 0% -66.67% (p=0.000 n=10+10) TenWith-8 3.00 ± 0% 1.00 ± 0% -66.67% (p=0.000 n=10+10) LogfmtLoggerSimple-8 4.00 ± 0% 2.00 ± 0% -50.00% (p=0.000 n=10+10) LogfmtLoggerContextual-8 7.00 ± 0% 3.00 ± 0% -57.14% (p=0.000 n=10+10) NopLoggerSimple-8 4.00 ± 0% 2.00 ± 0% -50.00% (p=0.000 n=10+10) NopLoggerContextual-8 7.00 ± 0% 3.00 ± 0% -57.14% (p=0.000 n=10+10) ValueBindingTimestamp-8 5.00 ± 0% 3.00 ± 0% -40.00% (p=0.000 n=10+10) ValueBindingCaller-8 4.00 ± 0% 2.00 ± 0% -50.00% (p=0.000 n=10+10) fmt name old time/op new time/op delta SprintfPadding-8 88.9ns ± 3% 79.1ns ± 1% -11.09% (p=0.000 n=10+7) SprintfEmpty-8 12.6ns ± 3% 12.8ns ± 3% ~ (p=0.136 n=10+10) SprintfString-8 38.7ns ± 5% 26.9ns ± 6% -30.65% (p=0.000 n=10+10) SprintfTruncateString-8 56.7ns ± 2% 47.0ns ± 3% -17.05% (p=0.000 n=10+10) SprintfQuoteString-8 164ns ± 2% 153ns ± 2% -7.01% (p=0.000 n=10+10) SprintfInt-8 38.9ns ±15% 26.5ns ± 2% -31.93% (p=0.000 n=10+9) SprintfIntInt-8 60.3ns ± 9% 38.2ns ± 1% -36.67% (p=0.000 n=10+8) SprintfPrefixedInt-8 58.6ns ±13% 51.2ns ±11% -12.66% (p=0.001 n=10+10) SprintfFloat-8 71.4ns ± 3% 64.2ns ± 3% -10.08% (p=0.000 n=8+10) SprintfComplex-8 175ns ± 3% 159ns ± 2% -9.03% (p=0.000 n=10+10) SprintfBoolean-8 33.5ns ± 4% 25.7ns ± 5% -23.28% (p=0.000 n=10+10) SprintfHexString-8 65.3ns ± 3% 51.7ns ± 5% -20.86% (p=0.000 n=10+9) SprintfHexBytes-8 67.2ns ± 5% 67.9ns ± 4% ~ (p=0.383 n=10+10) SprintfBytes-8 129ns ± 7% 124ns ± 7% ~ (p=0.074 n=9+10) SprintfStringer-8 127ns ± 4% 126ns ± 8% ~ (p=0.506 n=9+10) SprintfStructure-8 357ns ± 3% 359ns ± 3% ~ (p=0.469 n=10+10) ManyArgs-8 203ns ± 6% 126ns ± 3% -37.94% (p=0.000 n=10+10) FprintInt-8 119ns ±10% 74ns ± 3% -37.54% (p=0.000 n=10+10) FprintfBytes-8 122ns ± 4% 120ns ± 3% ~ (p=0.124 n=10+10) FprintIntNoAlloc-8 78.2ns ± 5% 74.1ns ± 3% -5.28% (p=0.000 n=10+10) ScanInts-8 349µs ± 1% 349µs ± 0% ~ (p=0.606 n=9+8) ScanRecursiveInt-8 43.8ms ± 7% 40.1ms ± 2% -8.42% (p=0.000 n=10+10) ScanRecursiveIntReaderWrapper-8 43.5ms ± 4% 40.4ms ± 2% -7.16% (p=0.000 n=10+9) name old alloc/op new alloc/op delta SprintfPadding-8 24.0B ± 0% 16.0B ± 0% -33.33% (p=0.000 n=10+10) SprintfEmpty-8 0.00B 0.00B ~ (all equal) SprintfString-8 21.0B ± 0% 5.0B ± 0% -76.19% (p=0.000 n=10+10) SprintfTruncateString-8 32.0B ± 0% 16.0B ± 0% -50.00% (p=0.000 n=10+10) SprintfQuoteString-8 48.0B ± 0% 32.0B ± 0% -33.33% (p=0.000 n=10+10) SprintfInt-8 16.0B ± 0% 1.0B ± 0% -93.75% (p=0.000 n=10+10) SprintfIntInt-8 24.0B ± 0% 3.0B ± 0% -87.50% (p=0.000 n=10+10) SprintfPrefixedInt-8 72.0B ± 0% 64.0B ± 0% -11.11% (p=0.000 n=10+10) SprintfFloat-8 16.0B ± 0% 8.0B ± 0% -50.00% (p=0.000 n=10+10) SprintfComplex-8 48.0B ± 0% 32.0B ± 0% -33.33% (p=0.000 n=10+10) SprintfBoolean-8 8.00B ± 0% 4.00B ± 0% -50.00% (p=0.000 n=10+10) SprintfHexString-8 96.0B ± 0% 80.0B ± 0% -16.67% (p=0.000 n=10+10) SprintfHexBytes-8 112B ± 0% 112B ± 0% ~ (all equal) SprintfBytes-8 96.0B ± 0% 96.0B ± 0% ~ (all equal) SprintfStringer-8 32.0B ± 0% 32.0B ± 0% ~ (all equal) SprintfStructure-8 256B ± 0% 256B ± 0% ~ (all equal) ManyArgs-8 80.0B ± 0% 0.0B -100.00% (p=0.000 n=10+10) FprintInt-8 8.00B ± 0% 0.00B -100.00% (p=0.000 n=10+10) FprintfBytes-8 32.0B ± 0% 32.0B ± 0% ~ (all equal) FprintIntNoAlloc-8 0.00B 0.00B ~ (all equal) ScanInts-8 15.2kB ± 0% 15.2kB ± 0% ~ (p=0.248 n=9+10) ScanRecursiveInt-8 21.6kB ± 0% 21.6kB ± 0% ~ (all equal) ScanRecursiveIntReaderWrapper-8 21.7kB ± 0% 21.7kB ± 0% ~ (all equal) name old allocs/op new allocs/op delta SprintfPadding-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) SprintfEmpty-8 0.00 0.00 ~ (all equal) SprintfString-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) SprintfTruncateString-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) SprintfQuoteString-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) SprintfInt-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) SprintfIntInt-8 3.00 ± 0% 1.00 ± 0% -66.67% (p=0.000 n=10+10) SprintfPrefixedInt-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) SprintfFloat-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) SprintfComplex-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) SprintfBoolean-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) SprintfHexString-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) SprintfHexBytes-8 2.00 ± 0% 2.00 ± 0% ~ (all equal) SprintfBytes-8 2.00 ± 0% 2.00 ± 0% ~ (all equal) SprintfStringer-8 4.00 ± 0% 4.00 ± 0% ~ (all equal) SprintfStructure-8 7.00 ± 0% 7.00 ± 0% ~ (all equal) ManyArgs-8 8.00 ± 0% 0.00 -100.00% (p=0.000 n=10+10) FprintInt-8 1.00 ± 0% 0.00 -100.00% (p=0.000 n=10+10) FprintfBytes-8 1.00 ± 0% 1.00 ± 0% ~ (all equal) FprintIntNoAlloc-8 0.00 0.00 ~ (all equal) ScanInts-8 1.60k ± 0% 1.60k ± 0% ~ (all equal) ScanRecursiveInt-8 1.71k ± 0% 1.71k ± 0% ~ (all equal) ScanRecursiveIntReaderWrapper-8 1.71k ± 0% 1.71k ± 0% ~ (all equal) Change-Id: I7ba72a25fea4140a0ba40a9f443103ed87cc69b5 Reviewed-on: https://go-review.googlesource.com/35554 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: -
David Lazar authored
This ensures there isn't a live reference to buf1 on our stack when MultiReader is inlined. Fixes #18819. Change-Id: I96a8cdc1ffad8f8a10c0ddcbf0299005f3176b61 Reviewed-on: https://go-review.googlesource.com/35931 Run-TryBot: David Lazar <lazard@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Josh Bleecher Snyder authored
Instead of always appending to c.Values, choose whichever slice is larger; b.Values will be set to nil anyway. Appending once instead of in a loop also limits slice growth to once per function call and is more efficient. Reduces max rss for the program in #18602 by 6.5%, and eliminates fuseBlockPlain from the alloc_space pprof output. fuseBlockPlain previously accounted for 16.74% of allocated memory. Updates #18602. Change-Id: I417b03722d011a59a679157da43dc91f4425210e Reviewed-on: https://go-review.googlesource.com/35114 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by:
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Keith Randall authored
Remove rotate generation from walk. Remove OLROT and ssa.Lrot* opcodes. Generate rotates during SSA lowering for architectures that have them. This CL will allow rotates to be generated in more situations, like when the shift values are determined to be constant only after some analysis. Fixes #18254 Change-Id: I8d6d684ff5ce2511aceaddfda98b908007851079 Reviewed-on: https://go-review.googlesource.com/34232 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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