- 30 Apr, 2018 12 commits
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Brad Fitzpatrick authored
It's also fewer system calls. Fall back to longer read only if it seems like the Uname result is truncated. Fixes #24701 Change-Id: Ib6550acede8dddaf184e8fa9de36377e17bbddab Reviewed-on: https://go-review.googlesource.com/110295Reviewed-by:
Ian Lance Taylor <iant@golang.org>
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Andrew Bonventre authored
Change-Id: I84334dfd02ad9a27b3fb6d46a6b1c015a3f03511 Reviewed-on: https://go-review.googlesource.com/110335Reviewed-by:
Filippo Valsorda <filippo@golang.org>
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Andrew Bonventre authored
Change-Id: I9699b22d3a308cda685aa684b32dcde99333df46 Reviewed-on: https://go-review.googlesource.com/110315Reviewed-by:
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Kevin Burke authored
I was confused about how to start an HTTP server if the server cert/key are in memory, not on disk. I thought it would be good to show an example of how to use these two functions to accomplish that. example-cert.pem and example-key.pem were generated using crypto/tls/generate_cert.go. Change-Id: I850e1282fb1c38aff8bd9aeb51988d21fe307584 Reviewed-on: https://go-review.googlesource.com/72252Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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Tobias Klauser authored
Even though GOARCH=riscv64 is not supported by gc yet, it is easy to make cmd/cgo already support it. Together with the changes in debug/elf in CL 107339 this e.g. allows to generate Go type definitions for linux/riscv64 in the golang.org/x/sys/unix package without using gccgo. Change-Id: I6b849df2ddac56c8c483eb03d56009669ca36973 Reviewed-on: https://go-review.googlesource.com/110066 Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Elias Naur authored
The iOS exec wrapper uses ios-deploy to set up a device, install the wrapped app, and start a lldb session to run it. ios-deploy is not built to be scripted, as can be seen from the brittle way it is driven by the Go wrapper. There are many timeouts and comments such as " // lldb tries to be clever with terminals. // So we wrap it in script(1) and be clever // right back at it. " This CL replaces the use of ios-deploy with a lldb driver script in Python. lldb is designed to be scripted, so apart from getting rid of the ios-deploy dependency, we gain: - No timouts and scripting ios-deploy through stdin and parsing stdout for responses. - Accurate exit codes. - Prompt exits when the wrapped binary fails for some reason. Before, the go test timeout would kick in to fail the test. - Support for environment variables. - No noise in the test output. Only the test binary output is output from the wrapper. We have to do more work with the lldb driver: mounting the developer image on the device, running idevicedebugserverproxy and installing the app. Even so, the CL removes almost as many lines as it adds. Furthermore, having the steps split up helps to tell setup errors from runtime errors. Change-Id: I48cccc32f475d17987283b2c93aacc3da18fe339 Reviewed-on: https://go-review.googlesource.com/107337 TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Keith Randall authored
Missed conversion of newosproc for the parts of darwin that weren't affected by my previous change. Update #25181 Change-Id: I81a2935e192b6d0df358c59b7e785eb03c504c23 Reviewed-on: https://go-review.googlesource.com/110123Reviewed-by:
Josh Bleecher Snyder <josharian@gmail.com>
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Alberto Donizetti authored
In the binary sizes FAQ, the approximate size of a Go hello world binary was said to be 1.5MB (it was about 1.6MB on go1.7 on linux/amd64). Sadly, this is no longer true. A Go1.10 hello world is 2.0MB, and in 1.11 it'll be about 2.5MB. Just say "a couple megabytes" to stop this dance. Change-Id: Ib4dc13a47ccd51327c1a9d90d4116f79597513a4 Reviewed-on: https://go-review.googlesource.com/110069Reviewed-by:
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Martin Möhrmann authored
Some of the comments relative paths do not exist and reflect does not define its own hmap structure. Correct paths and consistently reference paths starting from the go src directory. Change-Id: I5204a3a98f77d65f17dcde98b847378cea05ad8a Reviewed-on: https://go-review.googlesource.com/94758 Run-TryBot: Martin Möhrmann <moehrmann@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Wei Xiao authored
Add a compiler intrinsic for getcallerpc on arm64 for better code generation. Change-Id: I897e670a2b8ffa1a8c2fdc638f5b2c44bda26318 Reviewed-on: https://go-review.googlesource.com/109276Reviewed-by:
Cherry Zhang <cherryyz@google.com> Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Keith Randall authored
Replace thread creation with calls to the pthread library in libc. Update #17490 Change-Id: I1e19965c45255deb849b059231252fc6a7861d6c Reviewed-on: https://go-review.googlesource.com/108679 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Josh Bleecher Snyder authored
Fixes ssacheck build. Change-Id: Idf1d2ea9a971a1f17f2fca568099e870bb5d913f Reviewed-on: https://go-review.googlesource.com/110122 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Austin Clements <austin@google.com>
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- 29 Apr, 2018 14 commits
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Hana Kim authored
and assign the same colors for spans belong to the tasks (sadly, the trace viewer will change the saturation/ligthness for asynchronous slices so exact color mapping is impossible. But I hope they are not too far from each other) Change-Id: Idaaf0828a1e0dac8012d336dcefa1c6572ddca2e Reviewed-on: https://go-review.googlesource.com/109338 Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Heschi Kreinick <heschi@google.com>
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Alberto Donizetti authored
Change the help doc of go tool compile -d=ssa/help from this: compile: GcFlag -d=ssa/<phase>/<flag>[=<value>|<function_name>] <phase> is one of: check, all, build, intrinsics, early_phielim, early_copyelim early_deadcode, short_circuit, decompose_user, opt, zero_arg_cse opt_deadcode, generic_cse, phiopt, nilcheckelim, prove, loopbce decompose_builtin, softfloat, late_opt, generic_deadcode, check_bce fuse, dse, writebarrier, insert_resched_checks, tighten, lower lowered_cse, elim_unread_autos, lowered_deadcode, checkLower late_phielim, late_copyelim, phi_tighten, late_deadcode, critical likelyadjust, layout, schedule, late_nilcheck, flagalloc, regalloc loop_rotate, stackframe, trim <flag> is one of on, off, debug, mem, time, test, stats, dump <value> defaults to 1 <function_name> is required for "dump", specifies name of function to dump after <phase> Except for dump, output is directed to standard out; dump appears in a file. Phase "all" supports flags "time", "mem", and "dump". Phases "intrinsics" supports flags "on", "off", and "debug". Interpretation of the "debug" value depends on the phase. Dump files are named <phase>__<function_name>_<seq>.dump. To this: compile: PhaseOptions usage: go tool compile -d=ssa/<phase>/<flag>[=<value>|<function_name>] where: - <phase> is one of: check, all, build, intrinsics, early_phielim, early_copyelim early_deadcode, short_circuit, decompose_user, opt, zero_arg_cse opt_deadcode, generic_cse, phiopt, nilcheckelim, prove decompose_builtin, softfloat, late_opt, generic_deadcode, check_bce branchelim, fuse, dse, writebarrier, insert_resched_checks, lower lowered_cse, elim_unread_autos, lowered_deadcode, checkLower late_phielim, late_copyelim, tighten, phi_tighten, late_deadcode critical, likelyadjust, layout, schedule, late_nilcheck, flagalloc regalloc, loop_rotate, stackframe, trim - <flag> is one of: on, off, debug, mem, time, test, stats, dump - <value> defaults to 1 - <function_name> is required for the "dump" flag, and specifies the name of function to dump after <phase> Phase "all" supports flags "time", "mem", and "dump". Phase "intrinsics" supports flags "on", "off", and "debug". If the "dump" flag is specified, the output is written on a file named <phase>__<function_name>_<seq>.dump; otherwise it is directed to stdout. Also add a few examples at the bottom. Fixes #20349 Change-Id: I334799e951e7b27855b3ace5d2d966c4d6ec4cff Reviewed-on: https://go-review.googlesource.com/110062Reviewed-by: -
Josh Bleecher Snyder authored
The prove pass sometimes has bounds information that later rewrite passes do not. Use this information to mark shifts as bounded, and then use that information to generate better code on amd64. It may prove to be helpful on other architectures, too. While here, coalesce the existing shift lowering rules. This triggers 35 times building std+cmd. The full list is below. Here's an example from runtime.heapBitsSetType: if nb < 8 { b |= uintptr(*p) << nb p = add1(p) } else { nb -= 8 } We now generate better code on amd64 for that left shift. Updates #25087 vendor/golang_org/x/crypto/curve25519/mont25519_amd64.go:48:20: Proved Rsh8Ux64 bounded runtime/mbitmap.go:1252:22: Proved Lsh64x64 bounded runtime/mbitmap.go:1265:16: Proved Lsh64x64 bounded runtime/mbitmap.go:1275:28: Proved Lsh64x64 bounded runtime/mbitmap.go:1645:25: Proved Lsh64x64 bounded runtime/mbitmap.go:1663:25: Proved Lsh64x64 bounded runtime/mbitmap.go:1808:41: Proved Lsh64x64 bounded runtime/mbitmap.go:1831:49: Proved Lsh64x64 bounded syscall/route_bsd.go:227:23: Proved Lsh32x64 bounded syscall/route_bsd.go:295:23: Proved Lsh32x64 bounded syscall/route_darwin.go:40:23: Proved Lsh32x64 bounded compress/bzip2/bzip2.go:384:26: Proved Lsh64x16 bounded vendor/golang_org/x/net/route/address.go:370:14: Proved Lsh64x64 bounded compress/flate/inflate.go:201:54: Proved Lsh64x64 bounded math/big/prime.go:50:25: Proved Lsh64x64 bounded vendor/golang_org/x/crypto/cryptobyte/asn1.go:464:43: Proved Lsh8x8 bounded net/ip.go:87:21: Proved Rsh8Ux64 bounded cmd/internal/goobj/read.go:267:23: Proved Lsh64x64 bounded cmd/vendor/golang.org/x/arch/arm64/arm64asm/decode.go:534:27: Proved Lsh32x32 bounded cmd/vendor/golang.org/x/arch/arm64/arm64asm/decode.go:544:27: Proved Lsh32x32 bounded cmd/internal/obj/arm/asm5.go:1044:16: Proved Lsh32x64 bounded cmd/internal/obj/arm/asm5.go:1065:10: Proved Lsh32x32 bounded cmd/internal/obj/mips/obj0.go:1311:21: Proved Lsh32x64 bounded cmd/compile/internal/syntax/scanner.go:352:23: Proved Lsh64x64 bounded go/types/expr.go:222:36: Proved Lsh64x64 bounded crypto/x509/x509.go:1626:9: Proved Rsh8Ux64 bounded cmd/link/internal/loadelf/ldelf.go:823:22: Proved Lsh8x64 bounded net/http/h2_bundle.go:1470:17: Proved Lsh8x8 bounded net/http/h2_bundle.go:1477:46: Proved Lsh8x8 bounded net/http/h2_bundle.go:1481:31: Proved Lsh64x8 bounded cmd/compile/internal/ssa/rewriteARM64.go:18759:17: Proved Lsh64x64 bounded cmd/compile/internal/ssa/sparsemap.go:70:23: Proved Lsh32x64 bounded cmd/compile/internal/ssa/sparsemap.go:73:45: Proved Lsh32x64 bounded Change-Id: I58bb72f3e6f12f6ac69be633ea7222c245438142 Reviewed-on: https://go-review.googlesource.com/109776 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:Giovanni Bajo <rasky@develer.com>
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ChrisALiles authored
The motivation is avoid generating a pointer to the data being converted so it can be garbage collected. The change also slightly reduces binary size by shrinking call sites. Fixes #24286 Benchmark results: name old time/op new time/op delta ConvT2ESmall-4 2.86ns ± 0% 2.80ns ± 1% -2.12% (p=0.000 n=29+28) ConvT2EUintptr-4 2.88ns ± 1% 2.88ns ± 0% -0.20% (p=0.002 n=28+30) ConvT2ELarge-4 19.6ns ± 0% 20.4ns ± 1% +4.22% (p=0.000 n=19+30) ConvT2ISmall-4 3.01ns ± 0% 2.85ns ± 0% -5.32% (p=0.000 n=24+28) ConvT2IUintptr-4 3.00ns ± 1% 2.87ns ± 0% -4.44% (p=0.000 n=29+25) ConvT2ILarge-4 20.4ns ± 1% 21.3ns ± 1% +4.41% (p=0.000 n=30+26) ConvT2Ezero/zero/16-4 2.84ns ± 1% 2.99ns ± 0% +5.38% (p=0.000 n=30+25) ConvT2Ezero/zero/32-4 2.83ns ± 2% 3.00ns ± 0% +5.91% (p=0.004 n=27+3) Change-Id: I65016ec94c53f97c52113121cab582d0c342b7a8 Reviewed-on: https://go-review.googlesource.com/102636Reviewed-by:
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Giovanni Bajo authored
When a loop has bound len(s)-delta, findIndVar detected it and returned len(s) as (conservative) upper bound. This little lie allowed loopbce to drop bound checks. It is obviously more generic to teach prove about relations like x+d<w for non-constant "w"; we already handled the case for constant "w", so we just want to learn that if d<0, then x+d<w proves that x<w. To be able to remove the code from findIndVar, we also need to teach prove that len() and cap() are always non-negative. This CL allows to prove 633 more checks in cmd+std. Most of them are cases where the code was already testing before accessing a slice but the compiler didn't know it. For instance, take strings.HasSuffix: func HasSuffix(s, suffix string) bool { return len(s) >= len(suffix) && s[len(s)-len(suffix):] == suffix } When suffix is a literal string, the compiler now understands that the explicit check is enough to not emit a slice check. I also found a loopbce test that was incorrectly written to detect an overflow but had a off-by-one (on the conservative side), so it unexpectly passed with this CL; I changed it to really trigger the overflow as intended. Change-Id: Ib5abade337db46b8811425afebad4719b6e46c4a Reviewed-on: https://go-review.googlesource.com/105635 Run-TryBot: Giovanni Bajo <rasky@develer.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:David Chase <drchase@google.com>
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Giovanni Bajo authored
To be effective, this also requires being able to relax constraints on min/max bound inclusiveness; they are now exposed through a flags, and prove has been updated to handle it correctly. Change-Id: I3490e54461b7b9de8bc4ae40d3b5e2fa2d9f0556 Reviewed-on: https://go-review.googlesource.com/104041 Run-TryBot: Giovanni Bajo <rasky@develer.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Giovanni Bajo authored
Test both minimum and maximum bound, and prepare formatting for more advanced tests (inclusive / esclusive bounds). Change-Id: Ibe432916d9c938343bc07943798bc9709ad71845 Reviewed-on: https://go-review.googlesource.com/104040 Run-TryBot: Giovanni Bajo <rasky@develer.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Giovanni Bajo authored
prove now is able to do what loopbce used to do. Passes toolstash -cmp. Compilebench of the whole serie (master 9967582f): name old time/op new time/op delta Template 208ms ±18% 198ms ± 4% ~ (p=0.690 n=5+5) Unicode 99.1ms ±19% 96.5ms ± 4% ~ (p=0.548 n=5+5) GoTypes 623ms ± 1% 633ms ± 1% ~ (p=0.056 n=5+5) Compiler 2.94s ± 2% 3.02s ± 4% ~ (p=0.095 n=5+5) SSA 6.77s ± 1% 7.11s ± 2% +4.94% (p=0.008 n=5+5) Flate 129ms ± 1% 136ms ± 0% +4.87% (p=0.016 n=5+4) GoParser 152ms ± 3% 156ms ± 1% ~ (p=0.095 n=5+5) Reflect 380ms ± 2% 392ms ± 1% +3.30% (p=0.008 n=5+5) Tar 185ms ± 6% 184ms ± 2% ~ (p=0.690 n=5+5) XML 223ms ± 2% 228ms ± 3% ~ (p=0.095 n=5+5) StdCmd 26.8s ± 2% 28.0s ± 5% +4.46% (p=0.032 n=5+5) name old user-ns/op new user-ns/op delta Template 252M ± 5% 248M ± 3% ~ (p=1.000 n=5+5) Unicode 118M ± 7% 121M ± 4% ~ (p=0.548 n=5+5) GoTypes 790M ± 2% 793M ± 2% ~ (p=0.690 n=5+5) Compiler 3.78G ± 3% 3.91G ± 4% ~ (p=0.056 n=5+5) SSA 8.98G ± 2% 9.52G ± 3% +6.08% (p=0.008 n=5+5) Flate 155M ± 1% 160M ± 0% +3.47% (p=0.016 n=5+4) GoParser 185M ± 4% 187M ± 2% ~ (p=0.310 n=5+5) Reflect 469M ± 1% 481M ± 1% +2.52% (p=0.016 n=5+5) Tar 222M ± 4% 222M ± 2% ~ (p=0.841 n=5+5) XML 269M ± 1% 274M ± 2% +1.88% (p=0.032 n=5+5) name old text-bytes new text-bytes delta HelloSize 664k ± 0% 664k ± 0% ~ (all equal) CmdGoSize 7.23M ± 0% 7.22M ± 0% -0.06% (p=0.008 n=5+5) name old data-bytes new data-bytes delta HelloSize 134k ± 0% 134k ± 0% ~ (all equal) CmdGoSize 390k ± 0% 390k ± 0% ~ (all equal) name old exe-bytes new exe-bytes delta HelloSize 1.39M ± 0% 1.39M ± 0% ~ (all equal) CmdGoSize 14.4M ± 0% 14.4M ± 0% -0.06% (p=0.008 n=5+5) Go1 of the whole serie: name old time/op new time/op delta BinaryTree17-16 5.40s ± 6% 5.38s ± 4% ~ (p=1.000 n=12+10) Fannkuch11-16 4.04s ± 3% 3.81s ± 3% -5.70% (p=0.000 n=11+11) FmtFprintfEmpty-16 60.7ns ± 2% 60.2ns ± 3% ~ (p=0.136 n=11+10) FmtFprintfString-16 115ns ± 2% 114ns ± 4% ~ (p=0.175 n=11+10) FmtFprintfInt-16 118ns ± 2% 125ns ± 2% +5.76% (p=0.000 n=11+10) FmtFprintfIntInt-16 196ns ± 2% 204ns ± 3% +4.42% (p=0.000 n=10+11) FmtFprintfPrefixedInt-16 207ns ± 2% 214ns ± 2% +3.23% (p=0.000 n=10+11) FmtFprintfFloat-16 364ns ± 3% 357ns ± 2% -1.88% (p=0.002 n=11+11) FmtManyArgs-16 773ns ± 2% 775ns ± 1% ~ (p=0.457 n=11+10) GobDecode-16 11.2ms ± 4% 11.0ms ± 3% -1.51% (p=0.022 n=10+9) GobEncode-16 9.91ms ± 6% 9.81ms ± 5% ~ (p=0.699 n=11+11) Gzip-16 339ms ± 1% 338ms ± 1% ~ (p=0.438 n=11+11) Gunzip-16 64.4ms ± 1% 65.2ms ± 1% +1.28% (p=0.001 n=10+11) HTTPClientServer-16 157µs ± 7% 160µs ± 5% ~ (p=0.133 n=11+11) JSONEncode-16 22.3ms ± 4% 23.2ms ± 4% +3.79% (p=0.000 n=11+11) JSONDecode-16 96.7ms ± 3% 96.6ms ± 1% ~ (p=0.562 n=11+11) Mandelbrot200-16 6.42ms ± 1% 6.40ms ± 1% ~ (p=0.365 n=11+11) GoParse-16 5.59ms ± 7% 5.42ms ± 5% -3.07% (p=0.020 n=11+10) RegexpMatchEasy0_32-16 113ns ± 2% 113ns ± 3% ~ (p=0.968 n=11+10) RegexpMatchEasy0_1K-16 417ns ± 1% 416ns ± 3% ~ (p=0.742 n=11+10) RegexpMatchEasy1_32-16 106ns ± 1% 107ns ± 3% ~ (p=0.223 n=11+11) RegexpMatchEasy1_1K-16 654ns ± 2% 657ns ± 1% ~ (p=0.672 n=11+8) RegexpMatchMedium_32-16 176ns ± 3% 177ns ± 1% ~ (p=0.664 n=11+9) RegexpMatchMedium_1K-16 56.3µs ± 3% 56.7µs ± 3% ~ (p=0.171 n=11+11) RegexpMatchHard_32-16 2.83µs ± 5% 2.83µs ± 4% ~ (p=0.735 n=11+11) RegexpMatchHard_1K-16 82.7µs ± 2% 82.7µs ± 2% ~ (p=0.853 n=10+10) Revcomp-16 679ms ± 9% 782ms ±29% +15.16% (p=0.031 n=9+11) Template-16 118ms ± 1% 109ms ± 2% -7.49% (p=0.000 n=11+11) TimeParse-16 474ns ± 1% 462ns ± 1% -2.59% (p=0.000 n=11+11) TimeFormat-16 482ns ± 1% 494ns ± 1% +2.49% (p=0.000 n=10+11) name old speed new speed delta GobDecode-16 68.7MB/s ± 4% 69.8MB/s ± 3% +1.52% (p=0.022 n=10+9) GobEncode-16 77.6MB/s ± 6% 78.3MB/s ± 5% ~ (p=0.699 n=11+11) Gzip-16 57.2MB/s ± 1% 57.3MB/s ± 1% ~ (p=0.428 n=11+11) Gunzip-16 301MB/s ± 2% 298MB/s ± 1% -1.07% (p=0.007 n=11+11) JSONEncode-16 86.9MB/s ± 4% 83.7MB/s ± 4% -3.63% (p=0.000 n=11+11) JSONDecode-16 20.1MB/s ± 3% 20.1MB/s ± 1% ~ (p=0.529 n=11+11) GoParse-16 10.4MB/s ± 6% 10.7MB/s ± 4% +3.12% (p=0.020 n=11+10) RegexpMatchEasy0_32-16 282MB/s ± 2% 282MB/s ± 3% ~ (p=0.756 n=11+10) RegexpMatchEasy0_1K-16 2.45GB/s ± 1% 2.46GB/s ± 2% ~ (p=0.705 n=11+10) RegexpMatchEasy1_32-16 299MB/s ± 1% 297MB/s ± 2% ~ (p=0.151 n=11+11) RegexpMatchEasy1_1K-16 1.56GB/s ± 2% 1.56GB/s ± 1% ~ (p=0.717 n=11+8) RegexpMatchMedium_32-16 5.67MB/s ± 4% 5.63MB/s ± 1% ~ (p=0.538 n=11+9) RegexpMatchMedium_1K-16 18.2MB/s ± 3% 18.1MB/s ± 3% ~ (p=0.156 n=11+11) RegexpMatchHard_32-16 11.3MB/s ± 5% 11.3MB/s ± 4% ~ (p=0.711 n=11+11) RegexpMatchHard_1K-16 12.4MB/s ± 1% 12.4MB/s ± 2% ~ (p=0.535 n=9+10) Revcomp-16 370MB/s ± 5% 332MB/s ±24% ~ (p=0.062 n=8+11) Template-16 16.5MB/s ± 1% 17.8MB/s ± 2% +8.11% (p=0.000 n=11+11) Change-Id: I41e46f375ee127785c6491f7ef5bd35581261ae6 Reviewed-on: https://go-review.googlesource.com/104039 Run-TryBot: Giovanni Bajo <rasky@develer.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Giovanni Bajo authored
Reuse findIndVar to discover induction variables, and then register the facts we know about them into the facts table when entering the loop block. Moreover, handle "x+delta > w" while updating the facts table, to be able to prove accesses to slices with constant offsets such as slice[i-10]. Change-Id: I2a63d050ed58258136d54712ac7015b25c893d71 Reviewed-on: https://go-review.googlesource.com/104038 Run-TryBot: Giovanni Bajo <rasky@develer.com> Reviewed-by:
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Giovanni Bajo authored
When a branch is followed, we apply the relation as described in the domain relation table. In case the relation is in the positive domain, we can also infer an unsigned relation if, by that point, we know that both operands are non-negative. Fixes #20393 Change-Id: Ieaf0c81558b36d96616abae3eb834c788dd278d5 Reviewed-on: https://go-review.googlesource.com/100278 Run-TryBot: Giovanni Bajo <rasky@develer.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Giovanni Bajo authored
Implement it through a partial order datastructure, which keeps the relations between SSA values in a forest of DAGs and is able to discover contradictions. In make.bash, this patch is able to prove hundreds of conditions which were not proved before. Compilebench: name old time/op new time/op delta Template 371ms ± 2% 368ms ± 1% ~ (p=0.222 n=5+5) Unicode 203ms ± 6% 199ms ± 3% ~ (p=0.421 n=5+5) GoTypes 1.17s ± 4% 1.18s ± 1% ~ (p=0.151 n=5+5) Compiler 5.54s ± 2% 5.59s ± 1% ~ (p=0.548 n=5+5) SSA 12.9s ± 2% 13.2s ± 1% +2.96% (p=0.032 n=5+5) Flate 245ms ± 2% 247ms ± 3% ~ (p=0.690 n=5+5) GoParser 302ms ± 6% 302ms ± 4% ~ (p=0.548 n=5+5) Reflect 764ms ± 4% 773ms ± 3% ~ (p=0.095 n=5+5) Tar 354ms ± 6% 361ms ± 3% ~ (p=0.222 n=5+5) XML 434ms ± 3% 429ms ± 1% ~ (p=0.421 n=5+5) StdCmd 22.6s ± 1% 22.9s ± 1% +1.40% (p=0.032 n=5+5) name old user-time/op new user-time/op delta Template 436ms ± 8% 426ms ± 5% ~ (p=0.579 n=5+5) Unicode 219ms ±15% 219ms ±12% ~ (p=1.000 n=5+5) GoTypes 1.47s ± 6% 1.53s ± 6% ~ (p=0.222 n=5+5) Compiler 7.26s ± 4% 7.40s ± 2% ~ (p=0.389 n=5+5) SSA 17.7s ± 4% 18.5s ± 4% +4.13% (p=0.032 n=5+5) Flate 257ms ± 5% 268ms ± 9% ~ (p=0.333 n=5+5) GoParser 354ms ± 6% 348ms ± 6% ~ (p=0.913 n=5+5) Reflect 904ms ± 2% 944ms ± 4% ~ (p=0.056 n=5+5) Tar 398ms ±11% 430ms ± 7% ~ (p=0.079 n=5+5) XML 501ms ± 7% 489ms ± 5% ~ (p=0.444 n=5+5) name old text-bytes new text-bytes delta HelloSize 670kB ± 0% 670kB ± 0% +0.00% (p=0.008 n=5+5) CmdGoSize 7.22MB ± 0% 7.21MB ± 0% -0.07% (p=0.008 n=5+5) name old data-bytes new data-bytes delta HelloSize 9.88kB ± 0% 9.88kB ± 0% ~ (all equal) CmdGoSize 248kB ± 0% 248kB ± 0% -0.06% (p=0.008 n=5+5) name old bss-bytes new bss-bytes delta HelloSize 125kB ± 0% 125kB ± 0% ~ (all equal) CmdGoSize 145kB ± 0% 144kB ± 0% -0.20% (p=0.008 n=5+5) name old exe-bytes new exe-bytes delta HelloSize 1.43MB ± 0% 1.43MB ± 0% ~ (all equal) CmdGoSize 14.5MB ± 0% 14.5MB ± 0% -0.06% (p=0.008 n=5+5) Fixes #19714 Updates #20393 Change-Id: Ia090f5b5dc1bcd274ba8a39b233c1e1ace1b330e Reviewed-on: https://go-review.googlesource.com/100277 Run-TryBot: Giovanni Bajo <rasky@develer.com> Reviewed-by:
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Josh Bleecher Snyder authored
There are several things combined in this change. First, eliminate the gobitvector type in favor of adding a ptrbit method to bitvector. In non-performance-critical code, use that method. In performance critical code, though, load the bitvector data one byte at a time and iterate only over set bits. To support that, add and use sys.Ctz8. name old time/op new time/op delta StackCopyPtr-8 81.8ms ± 5% 78.9ms ± 3% -3.58% (p=0.000 n=97+96) StackCopy-8 65.9ms ± 3% 62.8ms ± 3% -4.67% (p=0.000 n=96+92) StackCopyNoCache-8 105ms ± 3% 102ms ± 3% -3.38% (p=0.000 n=96+95) Change-Id: I00b80f45612708bd440b1a411a57fa6dfa24aa74 Reviewed-on: https://go-review.googlesource.com/109716 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
getArgInfo is called a lot during stack copying. In the common case it doesn't do much work, but it cannot be inlined. This change works around that. name old time/op new time/op delta StackCopyPtr-8 108ms ± 5% 96ms ± 4% -10.40% (p=0.000 n=20+20) StackCopy-8 82.6ms ± 3% 78.4ms ± 6% -5.15% (p=0.000 n=19+20) StackCopyNoCache-8 130ms ± 3% 122ms ± 3% -6.44% (p=0.000 n=20+20) Change-Id: If7d8a08c50a4e2e76e4331b399396c5dbe88c2ce Reviewed-on: https://go-review.googlesource.com/108945 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Austin Clements authored
Currently, when the runtime looks up the stack map for a frame, it uses frame.continpc - 1 unless continpc is the function entry PC, in which case it uses frame.continpc. As a result, if continpc is the function entry point (which happens for deferred frames), it will actually look up the stack map *following* the first instruction. I think, though I am not positive, that this is always okay today because the first instruction of a function can never change the stack map. It's usually not a CALL, so it doesn't have PCDATA. Or, if it is a CALL, it has to have the entry stack map. But we're about to start emitting stack maps at every instruction that changes them, which means the first instruction can have PCDATA (notably, in leaf functions that don't have a prologue). To prepare for this, tweak how the runtime looks up stack map indexes so that if continpc is the function entry point, it directly uses the entry stack map. For #24543. Change-Id: I85aa818041cd26aff416f7b1fba186e9c8ca6568 Reviewed-on: https://go-review.googlesource.com/109349Reviewed-by:
Rick Hudson <rlh@golang.org>
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- 28 Apr, 2018 2 commits
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bill_ofarrell authored
This instruction was introduced on the z14 to accelerate "limbified" multiplications for certain cryptographic algorithms. This change allows it to be used in Go assembly. Change-Id: Ic93dae7fec1756f662874c08a5abc435bce9dd9e Reviewed-on: https://go-review.googlesource.com/109695 Run-TryBot: Michael Munday <mike.munday@ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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fanzha02 authored
Current optab entries are unordered, because the new instructions are added at the end of the optab. The patch reorders them by comments in optab, such as arithmetic operations, logical operations and a series of load/store etc. The patch removes the VMOVS opcode because FMOVS already has the same operation. Change-Id: Iccdf89ecbb3875b9dfcb6e06be2cc19c7e5581a2 Reviewed-on: https://go-review.googlesource.com/109896 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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- 27 Apr, 2018 12 commits
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Richard Musiol authored
Return a non-zero exit code if the WebAssembly host fails to compile the WebAssmbly bytecode to machine code. Change-Id: I774309db2872b6a2de77a1b0392608058414160d Reviewed-on: https://go-review.googlesource.com/110097Reviewed-by:
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Ben Shi authored
ARM64 supports efficient instructions which combine shift, addition, load/store together. Such as "MOVD (R0)(R1<<3), R2" and "MOVWU R6, (R4)(R1<<2)". This CL optimizes the compiler to emit such efficient instuctions. And below is some test data. 1. binary size before/after binary size change pkg/linux_arm64 +80.1KB pkg/tool/linux_arm64 +121.9KB go -4.3KB gofmt -64KB 2. go1 benchmark There is big improvement for the test case Fannkuch11, and slight improvement for sme others, excluding noise. name old time/op new time/op delta BinaryTree17-4 43.9s ± 2% 44.0s ± 2% ~ (p=0.820 n=30+30) Fannkuch11-4 30.6s ± 2% 24.5s ± 3% -19.93% (p=0.000 n=25+30) FmtFprintfEmpty-4 500ns ± 0% 499ns ± 0% -0.11% (p=0.000 n=23+25) FmtFprintfString-4 1.03µs ± 0% 1.04µs ± 3% ~ (p=0.065 n=29+30) FmtFprintfInt-4 1.15µs ± 3% 1.15µs ± 4% -0.56% (p=0.000 n=30+30) FmtFprintfIntInt-4 1.80µs ± 5% 1.82µs ± 0% ~ (p=0.094 n=30+24) FmtFprintfPrefixedInt-4 2.17µs ± 5% 2.20µs ± 0% ~ (p=0.100 n=30+23) FmtFprintfFloat-4 3.08µs ± 3% 3.09µs ± 4% ~ (p=0.123 n=30+30) FmtManyArgs-4 7.41µs ± 4% 7.17µs ± 1% -3.26% (p=0.000 n=30+23) GobDecode-4 93.7ms ± 0% 94.7ms ± 4% ~ (p=0.685 n=24+30) GobEncode-4 78.7ms ± 7% 77.1ms ± 0% ~ (p=0.729 n=30+23) Gzip-4 4.01s ± 0% 3.97s ± 5% -1.11% (p=0.037 n=24+30) Gunzip-4 389ms ± 4% 384ms ± 0% ~ (p=0.155 n=30+23) HTTPClientServer-4 536µs ± 1% 537µs ± 1% ~ (p=0.236 n=30+30) JSONEncode-4 179ms ± 1% 182ms ± 6% ~ (p=0.763 n=24+30) JSONDecode-4 843ms ± 0% 839ms ± 6% -0.42% (p=0.003 n=25+30) Mandelbrot200-4 46.5ms ± 0% 46.5ms ± 0% +0.02% (p=0.000 n=26+26) GoParse-4 44.3ms ± 6% 43.3ms ± 0% ~ (p=0.067 n=30+27) RegexpMatchEasy0_32-4 1.07µs ± 7% 1.07µs ± 4% ~ (p=0.835 n=30+30) RegexpMatchEasy0_1K-4 5.51µs ± 0% 5.49µs ± 0% -0.35% (p=0.000 n=23+26) RegexpMatchEasy1_32-4 1.01µs ± 0% 1.02µs ± 4% +0.96% (p=0.014 n=24+30) RegexpMatchEasy1_1K-4 7.43µs ± 0% 7.18µs ± 0% -3.41% (p=0.000 n=23+24) RegexpMatchMedium_32-4 1.78µs ± 0% 1.81µs ± 4% +1.47% (p=0.012 n=23+30) RegexpMatchMedium_1K-4 547µs ± 1% 542µs ± 3% -0.90% (p=0.003 n=24+30) RegexpMatchHard_32-4 30.4µs ± 0% 29.7µs ± 0% -2.15% (p=0.000 n=19+23) RegexpMatchHard_1K-4 913µs ± 0% 915µs ± 6% +0.25% (p=0.012 n=24+30) Revcomp-4 6.32s ± 1% 6.42s ± 4% ~ (p=0.342 n=25+30) Template-4 868ms ± 6% 878ms ± 6% +1.15% (p=0.000 n=30+30) TimeParse-4 4.57µs ± 4% 4.59µs ± 3% +0.65% (p=0.010 n=29+30) TimeFormat-4 4.51µs ± 0% 4.50µs ± 0% -0.27% (p=0.000 n=27+24) [Geo mean] 695µs 689µs -0.92% name old speed new speed delta GobDecode-4 8.19MB/s ± 0% 8.12MB/s ± 4% ~ (p=0.680 n=24+30) GobEncode-4 9.76MB/s ± 7% 9.96MB/s ± 0% ~ (p=0.616 n=30+23) Gzip-4 4.84MB/s ± 0% 4.89MB/s ± 4% +1.16% (p=0.030 n=24+30) Gunzip-4 49.9MB/s ± 4% 50.6MB/s ± 0% ~ (p=0.162 n=30+23) JSONEncode-4 10.9MB/s ± 1% 10.7MB/s ± 6% ~ (p=0.575 n=24+30) JSONDecode-4 2.30MB/s ± 0% 2.32MB/s ± 5% +0.72% (p=0.003 n=22+30) GoParse-4 1.31MB/s ± 6% 1.34MB/s ± 0% +2.26% (p=0.002 n=30+27) RegexpMatchEasy0_32-4 30.0MB/s ± 6% 30.0MB/s ± 4% ~ (p=1.000 n=30+30) RegexpMatchEasy0_1K-4 186MB/s ± 0% 187MB/s ± 0% +0.35% (p=0.000 n=23+26) RegexpMatchEasy1_32-4 31.8MB/s ± 0% 31.5MB/s ± 4% -0.92% (p=0.012 n=25+30) RegexpMatchEasy1_1K-4 138MB/s ± 0% 143MB/s ± 0% +3.53% (p=0.000 n=23+24) RegexpMatchMedium_32-4 560kB/s ± 0% 553kB/s ± 4% -1.19% (p=0.005 n=23+30) RegexpMatchMedium_1K-4 1.87MB/s ± 0% 1.89MB/s ± 3% +1.04% (p=0.002 n=24+30) RegexpMatchHard_32-4 1.05MB/s ± 0% 1.08MB/s ± 0% +2.40% (p=0.000 n=19+23) RegexpMatchHard_1K-4 1.12MB/s ± 0% 1.12MB/s ± 5% +0.12% (p=0.006 n=25+30) Revcomp-4 40.2MB/s ± 1% 39.6MB/s ± 4% ~ (p=0.242 n=25+30) Template-4 2.24MB/s ± 6% 2.21MB/s ± 6% -1.15% (p=0.000 n=30+30) [Geo mean] 7.87MB/s 7.91MB/s +0.44% Change-Id: If374cb7abf83537aa0a176f73c0f736f7800db03 Reviewed-on: https://go-review.googlesource.com/108735Reviewed-by:
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Cherry Zhang authored
The init function and runtime.addmoduledata were not added when building plugin, which caused the runtime could not find the module. Testplugin is still not enabled on linux/arm64 (https://go.googlesource.com/go/+/master/src/cmd/dist/test.go#948) because the gold linker on the builder is too old, which fails with an internal error (see issue #17138). I tested locally and it passes. Fixes #24940. Updates #17138. Change-Id: I26aebca6c38a3443af0949471fa12b6d550e8c6c Reviewed-on: https://go-review.googlesource.com/109917 Run-TryBot: Cherry Zhang <cherryyz@google.com> Reviewed-by:
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Milan Knezevic authored
mips64 softfloat support is based on mips implementation and introduces new enviroment variable GOMIPS64. GOMIPS64 is a GOARCH=mips64{,le} specific option, for a choice between hard-float and soft-float. Valid values are 'hardfloat' (default) and 'softfloat'. It is passed to the assembler as 'GOMIPS64_{hardfloat,softfloat}'. Change-Id: I7f73078627f7cb37c588a38fb5c997fe09c56134 Reviewed-on: https://go-review.googlesource.com/108475Reviewed-by: -
Josh Bleecher Snyder authored
Hex before: d0 a1 Hex after: 43 Not sure where that came from. Change-Id: I189e7e21f8faf480ba72846b956a149976f720f8 Reviewed-on: https://go-review.googlesource.com/109777Reviewed-by:
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Zhou Peng authored
Change-Id: I561640768c43491288e7f5bd1a34247787793dab Reviewed-on: https://go-review.googlesource.com/109935Reviewed-by:
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Yasuhiro Matsumoto authored
Fixes #24999 Change-Id: Ie0bb6a6e0fa3992cdd272d42347af65ae7c95463 Reviewed-on: https://go-review.googlesource.com/108755 TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Alex Brainman <alex.brainman@gmail.com>
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Daniel Martí authored
As a follow-up to the first README for cmd/compile/internal/ssa. Since this is the parent package for all the compiler packages, this README serves as an overview of the compiler and its packages. As more READMEs are added for specific parts with more detail, such as ssa's, they can be linked from this one. Thanks to Iskander Sharipov, Josh Bleecher Snyder, Matthew Dempsky, Alberto Donizetti, and Robert Griesemer for helping with all the details in this document. Change-Id: I820a535e25dce86ccc667ce1c6e92b75fc32f3af Reviewed-on: https://go-review.googlesource.com/103935Reviewed-by:
Martin Möhrmann <moehrmann@google.com> Reviewed-by:
Matthew Dempsky <mdempsky@google.com>
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Josh Bleecher Snyder authored
Not a big win, but cheap. name old alloc/op new alloc/op delta Template 34.4MB ± 0% 34.4MB ± 0% -0.20% (p=0.000 n=15+15) Unicode 29.2MB ± 0% 29.3MB ± 0% +0.17% (p=0.000 n=15+15) GoTypes 113MB ± 0% 113MB ± 0% -0.22% (p=0.000 n=15+15) Compiler 509MB ± 0% 508MB ± 0% -0.11% (p=0.000 n=15+14) SSA 1.46GB ± 0% 1.46GB ± 0% -0.08% (p=0.000 n=14+15) Flate 23.8MB ± 0% 23.7MB ± 0% -0.22% (p=0.000 n=15+15) GoParser 27.9MB ± 0% 27.8MB ± 0% -0.21% (p=0.000 n=14+15) Reflect 77.2MB ± 0% 77.0MB ± 0% -0.27% (p=0.000 n=14+15) Tar 34.0MB ± 0% 33.9MB ± 0% -0.21% (p=0.000 n=13+15) XML 42.6MB ± 0% 42.5MB ± 0% -0.15% (p=0.000 n=15+15) [Geo mean] 75.8MB 75.7MB -0.15% name old allocs/op new allocs/op delta Template 322k ± 0% 320k ± 0% -0.60% (p=0.000 n=15+15) Unicode 337k ± 0% 336k ± 0% -0.23% (p=0.000 n=12+15) GoTypes 1.13M ± 0% 1.12M ± 0% -0.58% (p=0.000 n=15+14) Compiler 4.67M ± 0% 4.65M ± 0% -0.38% (p=0.000 n=14+15) SSA 11.7M ± 0% 11.6M ± 0% -0.25% (p=0.000 n=15+15) Flate 216k ± 0% 214k ± 0% -0.67% (p=0.000 n=15+15) GoParser 271k ± 0% 270k ± 0% -0.57% (p=0.000 n=15+15) Reflect 927k ± 0% 920k ± 0% -0.72% (p=0.000 n=13+14) Tar 318k ± 0% 316k ± 0% -0.57% (p=0.000 n=15+15) XML 376k ± 0% 375k ± 0% -0.46% (p=0.000 n=14+14) [Geo mean] 731k 727k -0.50% Change-Id: I1417c5881e866fb3efe62a3d0fbe1134275da31a Reviewed-on: https://go-review.googlesource.com/109755 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
I forgot this in CL 109358. Change-Id: Ia5e8bd9cf43393f098b101a0d6a0c526e3e4f101 Reviewed-on: https://go-review.googlesource.com/109775 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Kevin Burke authored
If the vetted function supplies zero arguments, previously you would get an error message like this: Printf format %v reads arg #1, but call has only 0 args "has only 0 args" is an odd construction, and "has 0 args" sounds better. Getting rid of "only" in all cases simplifies the code and reads just as well. Change-Id: I4706dfe4a75f13bf4db9c0650e459ca676710752 Reviewed-on: https://go-review.googlesource.com/109457 Run-TryBot: Kevin Burke <kev@inburke.com> Run-TryBot: David Symonds <dsymonds@golang.org> Reviewed-by:David Symonds <dsymonds@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Daniel Martí authored
Simplify some C-style loops with range statements, and move some declarations closer to their uses. While at it, ensure that all the SymbolType consts are typed. Change-Id: I04b06afb2c1fb249ef8093a0c5cca0a597d1e05c Reviewed-on: https://go-review.googlesource.com/105217 Run-TryBot: Daniel Martí <mvdan@mvdan.cc> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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